ACiQ 2.5 Ton 16.8 SEER2 High Efficiency Central Heat Pump System | Inv – Mini Split Systems Direct
DUCTED AIR HANDLER 12K-60K UNITS INSTALLATION MANUAL Models Covered: ACiQ-12-AHD ACiQ-18-AHD ACiQ-24-AHD ACiQ-30-AHD ACiQ-36-AHD ACiQ-42-AHD ACiQ-48-AHD ACiQ-60-AHD WARNING: DO NOT destroy or lose this manual. Please read the manual thoroughly. Also, store the manual in a place that allows for easy retrieval and future reference. As a result of continuous product improvement, the specification and design of this product are subject to change without advanced notice. Consult your manufacturer or your dealer for further details regarding this product. The images and illustrations within this this manual are for reference only. The actual shape and size of your product may vary. VERSION DATE: 1-25-25 CONTENTS SAFETY PRECAUTIONS 02 ACCESSORIES 16 INDOOR UNIT INSTALLATION 17 REFRIGERANT PIPING CONNECTION 27 INSTALLATION OF ELECTRIC AUXILIARY HEAT MODULE (ONLY FOR HEAT FUNCTION MODELS) 31 CONFIRMATION OF INDOOR UNIT 33 OUTDOOR UNIT INSTALLATION 35 WIRING PRECAUTIONS 39 SPECIFICATION 52 AIR EVACUATION 54 NOTE ON ADDING REFRIGERANT 55 TEST RUN 56 Read this manual Inside you'll find many helpful hints on how to use and maintain your air conditioner properly. Just a little preventive care on your part can save you a great deal of time and money over the life of your air conditioner. These instructions may not cover every possible condition of use, so common sense and attention to safety is required when installing, operating and maintaining this product. 01 SAFETY PRECAUTIONS It is really important you read Safety Precautions Before Operation and Installation Incorrect installation due to ignoring instructions can cause serious damage or injury. The seriousness of potential damage or injuries is classified as either a WARNING or CAUTION. Explanation of Symbols WARNING This symbol indicates the possibility of personal injury or loss of life. CAUTION This symbol indicates the possibility of property damage or serious consequences. ELECTRICAL WARNINGS ° Only use the specified wire. If the wire is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified persons in order to avoid a hazard. ° The product must be properly grounded at the time of installation, or electric shock may occur. ° For all electrical work, follow all local and national wiring standards, regulations, and the Installation Manual. Connect cables tightly, and clamp them securely to prevent external forces from damaging the terminal. Improper electrical connections can overheat and cause fire, and may also cause shock. All electrical connections must be made according to the Electrical Connection Diagram located on the panels of the indoor and outdoor units. ° All wiring must be properly arranged to ensure that the control board cover can close properly. If the control board cover is not closed properly, it can lead to corrosion and cause the connection points on the terminal to heat up, catch fire, or cause electrical shock. ° Disconnection must be incorporated in the fixed wiring in accordance with the NEC, CEC or local codes. ° Do not share the electrical outlet with other appliances. Unit must be installed on dedicated electrical circuit. 02 WARNINGS FOR PRODUCT INSTALLATION ° Turn o the air conditioner and disconnect the power before performing any installation or repairs. Failure to do so can cause electric shock. ° Installation must be performed by an authorized dealer or specialist according to the installation instructions. Improper installation can cause water damage, electrical hazard or fire. Contact an authorized service technician for repair or maintenance. ° This appliance shall be installed in accordance with national wiring regulations. Only use the included accessories, parts, and specified parts for installation. ° Using non-standard parts can cause water leakage, electrical shock, fire, and can cause the unit to fail. ° Install the unit in a firm location that can support the unit's weight. If the chosen location cannot support the unit's weight, or the installation is not done properly, the unit may drop and cause serious injury and damage. ° Install drainage piping according to the instructions in this manual. Improper drainage may cause water damage to your home and property. ° For units that have an auxiliary electric heater, do not install the unit within 1 meter (3 feet) of any combustible materials. ° For the units that have a wireless network function, the USB device access, replacement, maintenance operations must be carried out by professional sta . ° Do not install the unit in a location that may be exposed to combustible gas leaks. If combustible gas accumulates around the unit, it may cause fire. ° Do not turn on the power until all work has been completed. ° When moving or relocating the air conditioner, consult experienced service technicians for disconnection and reinstallation of the unit. ° How to install the appliance to its support, please read the information for details in "indoor unit installation" and "outdoor unit installation" sections. TAKE NOTE OF FUSE SPECIFICATIONS The air conditioner's circuit board (PCB) is designed with a fuse to provide overcurrent protection. The specifications of the fuse are printed on the circuit board , for example : T3.15AL/250VAC, T5AL/250VAC, T3.15A/250VAC, T5A/250VAC, T20A/250VAC, T30A/250VAC,etc. NOTE: Only the blast-proof ceramic fuse can be used. WARNINGS FOR CLEANING AND MAINTENANCE ° Turn o the device and disconnect the power before cleaning. Failure to do so can cause electrical shock. ° Do not clean the air conditioner with excessive amounts of water. ° Do not clean the air conditioner with combustible cleaning agents. Combustible cleaning agents can cause fire or deformation. 03 WARNING FOR USING FLAMMABLE REFRIGERANT 1. Installation (Space) - That the installation of pipe-work shall be kept to a minimum. - That pipe-work shall be protected from physical damage. - Where refrigerant pipes shall be compliance with national gas regulations. - That mechanical connections shall be accessible for maintenance purposes. - In cases that require mechanical ventilation, ventilation openings shall be kept clear of obstruction. - When disposing of the product is used, be based on national regulations, properly processed. 2. Servicing - Any person who is involved with working on or breaking into a refrigerant circuit should hold a current valid certificate from an industry-accredited assessment authority, which authorises their competence to handle refrigerants safely in accordance with an industry recognized assessment specification. 3. Maintenance and repair requiring the assistance of other skilled personnel shall be carried out under the supervision of the person competent in the use of flammable refrigerants. 4. Do not use any means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer. 5. The appliance shall be stored in a room without continuously operating ignition sources (for example: open flames, an operating gas appliance or an operating electric heater). 6. Be more careful that foreign matter(oil, water,etc) does not enter the piping. Also, when storing the piping, securely seal the opening by pinching, taping, etc. 7. Do not pierce or burn. 8. Be aware that refrigerants may not contain an odor. 9. All working procedure that a ects safety means shall only be carried by competent persons. 10. Appliance shall be stored in a well ventilated area where the room size corresponds to the room area as specifiec for operation. 11. The appliance shall be stored so as to prevent mechanical damage from occurring. 12. Joints shall be tested with detection equipment with a capability of 5 g/year of refrigerant or better, with the equipment in standstill and under operation or under a pressure of at least these standstill or operation conditions after installation. Detachable joints shall NOT be used in the indoor side of the unit (brazed, welded joint could be used). 04 NOTE ABOUT FUSE SPECIFICATIONS · The air conditioner's circuit board (PCB) may be designed with a fuse to provide overcurrent protection. This fuse must be replaces with identical component. · The specifications of the fuse, if equipped, are printed on the circuit board, examples of such are T5A/250VAC and T10A/250VAC. NOTE ABOUT FLUORINATED GASSES (NOT APPLICABLE TO THE UNIT USING R290 REFRIGERANT) · This air-conditioning unit contains fluorinated greenhouse gasses. For specific information on the type of gas and the amount, please refer to the relevant label on the unit itself or the "Owner's Manual - Product Fiche " in the packaging of the outdoor unit. (European Union products only). · Installation, service, maintenance and repair of this unit must be performed by a certified technician. · Product uninstallation and recycling must be performed by a certified technician. · When the unit is checked for leaks, proper record-keeping of all checks is strongly recommended. The allowed static pressure range of the air conditioner on site is 0-0.80 in.wc.(0-200 Pa). The data below represents the static pressures at full required air flow used for AHRI testing. 12K-24K 30K-36K 42K-60K PRESSURE (After January 1, 2023) 0.5 in.wc.(125Pa) 0.5 in.wc.(125Pa) 0.5 in.wc.(125Pa) NOTE The maximum functional total external static pressure can not exceed 0.80 in.wc. or 200 Pa. The airflow reduces significantly beyond 0.80 in.wc. or 200Pa. System design should allow for the increased resistance of filters as they become dirty. Room size restriction The appliances are connected via an air duct system to one or more rooms, the bottom of the air outlet of the air duct in the room should be at a height 7.3ft/2.2m from the floor. In UL/CSA 60335-2-40, the R454B refrigerant belongs to mildly flammable refrigerants, which will limit the room area of the system service. Similarly, the total amount of refriger ant in the system should be less than or equal to the maximum allowable refrigerant charge, which depends on the room area serviced by the system. 05 NOTE The nouns in this section are explained as follows : Mc: The actual refrigerant charge in the system. A: the actual room area where the appliance is installed. Amin: The required minimum room area. Mmax: The allowable maximum refrigerant charge in a room. Qmin: The minimum circulation airllow. Anvmin The minimum opening area for connected rooms. TAmin: The total area of the conditioned space (For appliances serving one or more rooms with an air dut system). TA: The total area of the conditioned space connected by air ducts. Refrigerant charge and room area limitations For the purpose of determination of room area (A) when used to calculate the maximum allowable refrigerant charge (mmax) in an unventilated space, the following shall apply. The room area (A) shall be defined as the room area enclosed by the projection to the floor of the walls, partitions and doors of the space in which the appliance is installed. Spaces connected by only drop ceilings, ductwork, or similar connections shall not be considered a single space. For units mounted higher than 6.0ft/1.8m, spaces divided by partition walls which are no higher than 5.3ft/1.6m shall be considered a single space. For fixed appliances, rooms on the same floor and connected by an open passageway between the spaces can be considered a single room when determining compliance to Amin, if the passageway complies with all of the following. · It is a permanent opening. · It extends to the floor. · It is intended for people to walk through. For fixed appliances, the area of the adjacent rooms, on the same floor, connected by permanent opening in the walls and/or doors between occupied spaces, including gaps between the wall and the floor, can be considered a single room when determining compliance to Amin, provided all of the following are met. · The space shall have appropriate openings according to Sec.2. · The minimum opening area for natural ventilation Anvmin shall not be less than the following: Height of outlet/m 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 A/m² 5 6 7 8 9 10 11 12 13 14 15 16 17 Mc/kg 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 Mmax/kg 2.685 2.941 3.177 3.396 3.602 3.797 3.983 4.160 4.330 4.493 4.651 4.803 4.951 Anvmin/m² 0.045 0.042 0.038 0.035 0.031 0.028 0.024 0.020 0.016 0.013 0.009 0.005 0.001 06 Note: Take the Mc =5.0kg as an example. For appliances serving one or more rooms with an air duct system, the room area calculation shall be determined based on the total area of the conditioned space (TA) connected by ducts taking into consideration that the circulating airflow distributed to all the rooms by the appliance integral indoor fan will mix and dilute the leaking refrigerant before entering any room. Opening conditions for connected rooms When the openings for connected rooms are required, the following conditions shall be applied. · The area of any openings above 300mm from the floor shall not be considered in determining compliance with Anvmin. · At least 50% of the required opening area Anvmin shall be below 200mm from the floor. · The bottom of the lowest openings shall not be higher than the point of release when the unit is installed and not more than 100mm from the floor. · Openings are permanent openings which cannot be closed. For openings extending to the floor the height shall not be less than 20mm above the surface of the floor covering · A second higher opening shall be provided. The total size of the second opening shall not be less than 50% of minimum opening area for Anvmin and shall be at least 1.5 m above the floor. NOTE: The requirement for the second opening can be met by drop ceilings, ventilation ducts, or similar arrangements that provide an airflow path between the connected rooms. · The room into which refrigerant can leak, plus the connected adjacent room(s) shall have a total area of not less than TAmin. · The room area in which the unit is installed shall be not less than 20 %TAmin. For R454B refrigerant charge amount and minimum room area: The machine you purchased may be one of the types in the table below. The indoor and outdoor units are designed to be used together. Please check the machine you purchased.The minimum room area of operating or storage should be as specified in the following table 07 Products series Model 12K(208/230V) Indoor unit ACIQ-12-AHD Outdoor unit ACIQ-12-EHPD 18K(208/230V) ACIQ-18-AHD ACIQ-18-EHPD ACIQ-18-HPD 24K(208/230V) ACIQ-24-AHD ACIQ-24-EHPD ACIQ-24-HPD 2GenAHU 30K(208/230V) 36K(208/230V) ACIQ-30-AHD ACIQ-36-AHD ACIQ-30-EHPD ACIQ-30-HPD ACIQ-36-EHPD ACIQ-36-HPD 42K(208/230V) ACIQ-42-AHD ACIQ-42-HPD 48K(208/230V) ACIQ-48-AHD ACIQ-48-EHPD ACIQ-48-HPD 60K(208/230V) ACIQ-60-AHD ACIQ-60-EHPD ACIQ-60-HPD Mc or MREL [oz/kg] =62.7/1.776 63.5/1.8 70.5/2 77.6/2.2 84.6/2.4 91.7/2.6 98.8/2.8 105.8/3 112.9/3.2 119.9/3.4 127/3.6 TAmin [ft²/m²] 12/1.1 60/5.53 66/6.14 73/6.76 79/7.37 86/7.99 93/8.6 99/9.21 106/9.83 112/10.44 119/11.06 Mc or MREL [oz/kg] 134/3.8 141.1/4 148.1/4.2 155.2/4.4 162.2/4.6 169.3/4.8 176.4/5 183.4/5.2 190.5/5.4 197.5/5.6 204.6/5.8 TAmin [ft²/m²] 126/11.67 132/12.29 139/12.9 145/13.51 152/14.13 159/14.74 165/15.36 172/15.97 179/16.58 185/17.2 192/17.81 Mc or MREL [oz/kg] 211.6/6.0 218.7/6.2 225.8/6.4 232.8/6.6 239.9/6.8 246.9/7.0 254/7.2 261/7.4 268.1/7.6 275.1/7.8 282.2/8.0 TAmin [ft²/m²] 198/18.43 205/19.04 212/19.66 218/20.27 225/20.88 231/21.5 238/22.11 245/22.73 251/23.34 258/23.96 264/24.57 Mc or MREL [oz/kg] 289.2/8.2 296.3/8.4 303.4/8.6 310.4/8.8 317.5/9.0 324.5/9.2 331.6/9.4 338.6/9.6 345.7/9.8 352.7/10.0 TAmin [ft²/m²] 271/25.18 278/25.8 284/26.41 291/27.63 298/27.64 304/28.26 311/28.87 317/29.48 324/30.10 331/30.71 Area formula TAmin is the required minimum room area in ft2/m2 Mc is the actual refrigerant charge in the system in oz/kg MREL is the refrigerant releaseable charge in oz/kg hinst is the height of the bottom of the appliance relative to the floor of the room after installation. WARNING: The minimum room area or minimum room area of conditioned space is based on releasable charge and total system refrigerant charge. When the unit detects a refrigerant leak, the minimum airflow of the indoor unit is as follows: Model 12K-18K 24K 30K 36K 42K-48K 60K Nominal 400CFM 400CFM 447CFM 541CFM 706CFM 824CFM air volume (680m³/h) (680m³/h) (760m³/h) (920m³/h) (1200m³/h) (1400m³/h) 08 1. Installation(where refrigerant pipes are allowed) - Any person who is involved with working on or breaking into a refrigerant circuit should hold a current valid certificate from an industry-accredited assessment authority, which authorizes their competence to handle refrigerants safely in accordance with an industry recognized assessment specification. - Maintenance and repair requiring the assistance of other skilled personnel shall be carried out under the supervision of the person competent in the use of flammable refrigerants. - That the installation of pipe-work shall be kept to a minimum. - That pipe-work shall be protected from physical damage. - Where refrigerant pipes shall be compliance with national gas regulations. - That mechanical connections shall be accessible for maintenance purposes. - Be more careful that foreign matter(oil, water,etc) does not enter the piping. Also, when storing the piping, securely seal the opening by pinching, taping, etc. - All working procedure that a ects safety means shall only be carried by competent persons. - Appliance shall be stored in a well ventilated area where the room size corresponds to the room area as specified for operation. - Joints shall be tested with detection equipment with a capability of 5 g/year of refrigerant or better, with the equipment in standstill and under operation or under a pressure of at least these standstill or operation conditions after installation. Detachable joints shall NOT be used in the indoor side of the unit (brazed, welded joint could be used). - In cases that require mechanical ventilation, ventilation openings shall be kept clear of obstruction. - LEAK DETECTION SYSTEM installed. Unit must be powered except for service. For the unit with refrigerant sensor, when the refrigerant sensor detects refrigerant leakage, the indoor unit will display a error code and emit a buzzing sound, the compressor of outdoor unit will immediately stop, and the indoor fan will start running. The service life of the refrigerant sensor is 15 years. When the refrigerant sensor malfunctions, the indoor unit will display the error code "FHCC". The refrigerant sensor can not be repaired and can only be replaced by the manufacturer. It shall only be replaced with the sensor specified by the manufacturer. 2. When a FLAMMABLE REFRIGERANT is used, the requirements for installation space of appliance and/or ventilation requirements are determined according to - the mass charge amount(M) used in the appliance, - the installation location, - the type of ventilation of the location or of the appliance. - piping material, pipe routing, and installation shall include protection from physical damage in operation and service, and be in compliance with national and local codes and standards, such as ASHRAE 15, IAPMO Uniform Mechanical Code, ICC International Mechanical Code, or CSA B52. All field joints shall be accessible for inspection prior to being covered or enclosed. - that protection devices, piping, and fittings shall be protected as far as possible against adverse environmental e ects, for example, the danger of water collecting and freezing in relief pipes or the accumulation of dirt and debris; - that piping in refrigeration systems shall be so designed and installed to minimize the likelihood of hydraulic shock damaging the system; - that steel pipes and components shall be protected against corrosion with a rustproof coating before applying any insulation; - that precautions shall be taken to avoid excessive vibration or pulsation; - the minimum floor area of the room shall be mentioned in the form of a table or a single figure without reference to a formula; - after completion of field piping for split systems, the field pipework shall be pressure tested with an inert gas and then vacuum tested prior to refrigerant charging, according to the following requirements: 09 a. The minimum test pressure for the low side of the system shall be the low side design pressure and the minimum test pressure for the high side of the system shall be the high side design pressure, unless the high side of the system can not be isolated from the low side of the system in which case the entire system shall be pressure tested to the low side design pressure. b. The test pressure after removal of pressure source shall be maintained for at least 1 h with no decrease of pressure indicated by the test gauge, with test gauge resolution not exceeding 5% of the test pressure. c. During the evacuation test, after achieving a vacuum level specified in the manual or less, the refrigeration system shall be isolated from the vacuum pump and the pressure shall not rise above 1500 microns within 10 min. The vacuum pressure level shall be specified in the manual, and shall be the lessor of 500 microns or the value required for compliance with national and local codes and standards, which may vary between residential, commercial,and industrial buildings. - field-made refrigerant joints indoors shall be tightness tested according to the following requirements: The test method shall have a sensitivity of 5 grams per year of refrigerant or better under a pressure of at least 0.25 times the maximum allowable pressure. No leak shall be detected. 3 . Qualification of workers Any maintenance, service and repair operations must be required qualification of the working personnel. Every working procedure that a ects safety means shall only be carried out by competent persons that joined the training and achieved competence should be documented by a certificate. The training of these procedures is carried out by national training organizations or manufacturers that are accredited to teach the relevant national competency standards that may be set in legislation. All training shall follow the ANNEX HH requirements of UL 60335-2-40 4th Edition. Examples for such working procedures are: · breaking into the refrigerating circuit; · opening of sealed components; · opening of ventilated enclosures. 4. Checks to the area Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensure that the risk of ignition is minimised. For repair to the refrigerating system, the following precautions shall be complied with prior to conducting work on the system. 5. Work procedure Works shall be undertaken under a controlled procedure so as to minimise the risk of a flammable gas or vapour being present while the work is being performed. 6. General work area All maintenance sta and others working in the local area shall be instructed on the nature of work being carried out. work in confined spaces shall be avoided. 7. Checking for presence of refrigerant The area shall be checked with an appropriate refrigerant detector prior to and during work, to ensure the technician is aware of potentially flammable atmospheres. Ensure that the leak detection equipment being used is suitable for use with flammable refrigerants, i.e. no sparking, adequately sealed or intrinsically safe. 8. Presence of fire extinguisher If any hot work is to be conducted on the refrigeration equipment or any associated parts, appropriate fire extinguishing equipment shall be available to hand. Have a dry power or CO2 fire extinguisher adjacent to the charging area. 10 9. No ignition sources No person carrying out work in relation to a REFRIGERATING SYSTEM which involves exposing any pipe work shall use any sources of ignition in such a manner that it may lead to the risk of fire or explosion. All possible ignition sources, including cigarette smoking, should be kept su ciently far away from the site of installation, repairing, removing and disposal, during which refrigerant can possibly be released to the surrounding space. Prior to work taking place, the area around the equipment is to be surveyed to make sure that there are no flammable hazards or ignition risks. "No Smoking" signs shall be displayed. 10. Ventilated area Ensure that the area is in the open or that it it adequately ventilated before breaking into the system or conducting any hot work. A degree of ventilation shall continue during the period that the work is carried out. The ventilation should safely disperse any released refrigerant and preferably expel it externally into the atmosphere. 11. Checks to the refrigeration equipment Where electrical components are being changed, they shall be fit for the purpose and to the correct specification. At all times the manufacturer's maintenance and service guidelines shall be followed. If in doubt consult the manufacturer's technical department for assistance. The following checks shall be applied to installations using FLAMMABLE REFRIGERANTS: the actual refrigerant charge is in accordance with the room size within which the refrigerant containing parts are installed; the ventilation machinery and outlets are operating adequately and are not obstructed; if an indirect refrigerating circuit is being used, the secondary circuits shall be checked for the presence of refrigerant; marking to the equipment continues to be visible and legible, marking and signs that are illegible shall be corrected; refrigeration pipe or components are installed in a position where they are unlikely to be exposed to any substance which may corrode refrigerant containing components, unless the components are constructed of materials which are inherently resistant to being corroded or are suitably protected against being so corroded. 12. Checks to electrical devices Repair and maintenance to electrical components shall include initial safety checks and component inspection procedures. If a fault exists that could compromise safety, then no electrical supply shall be connected to the circuit until it is satisfactorily dealt with. If the fault cannot be corrected immediately but it is necessary to continue operation, and adequate temporary solution shall be used. This shall be reported to the owner of the equipment so all parties are advised. Initial safety checks shall include: that capacitors are discharged: this shall be done in a safe manner to avoid possibility of sparking; that there no live electrical components and wiring are exposed while charging, recovering or purging the system; that there is continuity of earth bonding; Sealed electrical components shall be replaced if it's damage; Intrinsically safe components must be replaced if it's damage. 13. Wiring Check that wiring will not be subject to wear, corrosion, excessive pressure, vibration, sharp edges or any other adverse environmental e ects. The check shall also take into account the e ects of aging or continual vibration from sources such as compressors or fans. 11 14. Detection of flammable refrigerants Under no circumstances shall potential sources of ignition be used in the searching for or detection of refrigerant leaks. A halide torch(or any other detector using a naked flame) shall not be used. The following leak detection methods are deemed acceptable for refrigerant systems. Electronic leak detectors may be used to detect refrigerant leaks but, in the case of FLAMMABLE REFRIGERANTS, the sensitivity may not be adequate, or may need re-calibration. (Detection equipment shall be calibrated in a refrigerantfree area.) Ensure that the detector is not a potential source of ignition and is suitable for the refrigerant used. Leak detection equipment shall be set at a percentage of the LFL of the refrigerant and shall be calibrated to the refrigerant employed, and the appropriate percentage of gas (25 % maximum) is confirmed. Leak detection fluids are also suitable for use with most refrigerants but the use of detergents containing chlorine shall be avoided as the chlorine may react with the refrigerant and corrode the copper pipe-work. NOTE Examples of leak detection fluids are - bubble method. If a leak is suspected, all naked flames shall be removed/extinguished. If a leakage of refrigerant is found which requires brazing, all of the refrigerant shall be recovered from the system, or isolated (by means of shut o valves) in a part of the system remote from the leak. See the following instructions of removal of refrigerant. 15. Removal and evacuation When breaking into the refrigerant circuit to make repairs - or for any other purpose conventional procedures shall be used. However, for flammable refrigerants it is important that best practice be followed, since flammability is a consideration. The following procedure shall be adhered to: safely remove refrigerant following local and national regulations; evacuate; purge the circuit with inert gas (optional for A2L); evacuate (optional for A2L); continuously flush or purge with inert gas when using flame to open circuit; and open the circuit. The refrigerant charge shall be recovered into the correct recovery cylinders if venting is not allowed by local and national codes. For appliances containing flammable refrigerants, the system shall be purged with oxygen-free nitrogen to render the appliance safe for flammable refrigerants. This process might need to be repeated several times. Compressed air or oxygen shall not be used for purging refrigerant systems. For appliances containing flammable refrigerants, refrigerants purging shall be achieved by breaking the vacuum in the system with oxygen-free nitrogen and continuing to fill until the working pressure is achieved, then venting to atmosphere, and finally pulling down to a vacuum (optional for A2L). This process shall be repeated until no refrigerant is within thesystem (optional for A2L). When the final oxygen-free nitrogen charge is used, the system shall be vented down to atmospheric pressure to enable work to take place. The outlet for the vacuum pump shall not be close to any potential ignition sources, and ventilation shall be available. 12 17. Charging procedures In addition to conventional charging procedures, the following requirements shall be followed: Works shall be undertaken with appropriate tools only (In case of uncertainty, please consult the manufacturer of the tools for use with flammable refrigerants) Ensure that contamination of di erent refrigerants does not occur when using charging equipment. Hoses or lines shall be as short as possible to minimize the amount of refrigerant contained in them. Cylinders shall be kept upright. Ensure that the refrigeration system is earthed prior to charging the system with refrigerant. Label the system when charging is complete(if not already). Extreme care shall be taken not to overfill the refrigeration system. Prior to recharging the system it shall be pressure tested with oxygen free nitrogen (OFN). The system shall be leak tested on completion of charging but prior to commissioning. A follow up leak test shall be carried out prior to leaving the site. 18. Decommissioning Before carrying out this procedure, it is essential that the technician is completely familiar with the equipment and all its detail. It is recommended good practice that all refrigerants are recovered safely. Prior to the task being carried out, an oil and refrigerant sample shall be taken in case analysis is requiredprior to re-use of recovered refrigerant. It is essential that electrical power is available before the task iscommenced. a) Become familiar with the equipment and its operation. b) Isolate system electrically c) Before attempting the procedure ensure that: mechanical handling equipment is available, if required, for handling refrigerant cylinders; all personal protetive equipment is available and being used correctly; the recovery process is supervised at all times by a competent person; recovery equipment and cylinders conform to the appropriate standards. d) Pump down refrigerant system, if possible. e) If a vacuum is not possible, make a manifold so that refrigerant can be removed from various parts of the system. f) Make sure that cylinder is situated on the scales before recovery takes place. g) Start the recovery machine and operate in accordance with instructions. h) Do not overfill cylinders (no more than 80 % volume liquid charge) i) Do not exceed the maximum working pressure of the cylinder, even temporarily. j) When the cylinders have been filled correctly and the process completed, make sure that the cylinders and the equipment are removed from site promptly and all isolation valves on the equipment are closed o . k) Recovered refrigerant shall not be charged into another refrigeration system unless it has been cleaned and checked. 19. Labeling Equipment shall be labelled stating that it has been de-commissioned and emptied of refrigerant. The label shall be dated and signed. For appliances containing FLAMMABLE REFRIGERANTS, ensure that there are labels on the equipment stating the equipment contains FLAMMABLE REFRIGERANT. 13 20. Recovery When removing refrigerant from a system, either for servicing or decommissioning, it is recommended good practice that all refrigerants are removed safely. When transferring refrigerant into cylinders, ensure that only appropriate refrigerant recovery cylinders are employed. Ensure that the correct number of cylinders for holding the total system charge is available. All cylinders to be used are designated for the recovered refrigerant and labelled for that refrigerant (i. e. special cylinders for the recovery of refrigerant). Cylinders shall be complete with pressure-relief valve and associated shut-o valves in good working order. Empty recovery cylinders are evacuated and, if possible,cooled before recovery occurs. The recovery equipment shall be in good working order with a set of instructions concerning the equipment that is at hand and shall be suitable for the recovery of the flammable refrigerant. If in doubt, the manufacturer should be consulted. In addition, a set of calibrated weighing scales shall be available and in good working order. Hoses shall be complete with leak-free disconnect couplings and in good condition. The recovered refrigerant shall be processed according to local legislation in the correct recovery cylinder, and the relevant waste transfer note arranged. Do not mix refrigerants in recovery units and especially not in cylinders. If compressors or compressor oils are to be removed, ensure that they have been evacuated to an acceptable level to make certain that flammable refrigerant does not remain within the lubricant. The compressor body shall not be heated by an open flame or other ignition sources to accelerate this process. When oil is drained from a system, it shall be carried out safely. 21. Unventilated areas - An unventilated area where the appliance using FLAMMABLE REFRIGERANTS is installed shall be so constructed that should any refrigerant leak, it will not stagnate so as to create a fire or explosion hazard. - If appliances connected via an air duct system to one or more rooms with A2L REFRIGERANTS are installed in a room with an area less than Amin,that room shall be without continuously operating open flames (e.g. an operating gas appliance) or other POTENTIAL IGNITION SOURCES (for e.g. an operating electric heater, hot surfaces). A flame-producing device may be installed in the same space if the device is provided with an e ective flame arrest - Auxiliary devices which may be a POTENTIAL IGNITION SOURCE shall not be installed in the duct work. Examples of such POTENTIAL IGNITION SOURCES are hot surfaces with a temperature exceeding 700 °C and electric switching devices. - Only auxiliary devices(such as certificated heater kit) approved by the appliance manufacturer or declared suitable with the refrigerant shall be installed in connecting ductwork. - For duct connected appliances, false ceilings or drop ceilings may be used as a return air plenum if a REFRIGERANT DETECTION SYSTEM is provided in the appliance and any external connections are also provided with a sensor immediately below the return air plenum duct joint. - REFRIGERANT SENSORS for REFRIGERANT DETECTION SYSTEMS Shall Only be replaced with sensors specified by the appliance manufacture. - LEAK DETECTION SYSTEM installed. Unit must be powered except for service. 14 22. Transportation, marking and storage for units that employ flammable refrigerants a. General The following information is provided for units that employ FLAMMABLE REFRIGERANTS. b. Transport of equipment containing flammable refrigerants Attention is drawn to the fact that additional transportation regulations may exist with respect to equipment containing flammable gas. The maximum number of pieces of equipment or the configuration of the equipment permitted to be transported together will be determined by the applicable transport regulations. c. Marking of equipment using signs Signs for similar appliances used in a work area are generally addressed by local regulations and give the minimum requirements for the provision of safety and/or health signs for a work location. All required signs are to be maintained and employers should ensure that employees receive suitable and su cient instruction and training on the meaning of appropriate safety signs and the actions that need to be taken in connection with these signs. The e ectiveness of signs should not be diminished by too many signs being placed together. Any pictograms used should be as simple as possible and contain only essential details. d. Disposal of equipment using flammable refrigerants See national regulations. e. Storage of equipment/appliances The storage of the appliance should be in accordance with the applicable regulations or instructions,whichever is more stringent. f. Storage of packed (unsold) equipment Storage package protection should be constructed in such a way that mechanical damage to the equipment inside the package will not cause a leak of the REFRIGERANT CHARGE. The maximum number of pieces of equipment permitted to be stored together will be determined by local regulations. Explanation of symbols displayed on the indoor unit or outdoor unit This symbol shows that this appliance used a flammable WARNING refrigerant. If the refrigerant is leaked and exposed to an external ignition source, there is a risk of fire. This symbol shows that the operation manual should be CAUTION read carefully. CAUTION CAUTION This symbol shows that a service personnel should be handling this equipment with reference to the installation manual. This symbol shows that information is available such as CAUTION the operating manual or installation manual. 15 ACCESSORIES The air conditioning system comes with the following accessories. Use all of the installation parts and accessories to install the air conditioner. Improper installation may result in water leakage, electrical shock and fire, or equipment failure. Accessories (Packed with the indoor unit) Manual Cable ties 6 Insulation sleeve Flare nut Braze to flare adapter Remote controller (purchase separately) Battery (purchase separately) Wired remote controller (purchase separately) NOTICE The wired system control functions as an IR receiver for the handheld remote, if the remote is not used it must be retained with the indoor unit to adjust parameters, and for troubleshooting. 16 INDOOR UNIT INSTALLATION CAUTION Install the indoor and outdoor units, cables and wires at least 3-1/5ft (1m) from televisions or radios to prevent static or image distortion. Depending on the appliances, a 3-1/5ft (1m) distance may not be su cient. The Indoor unit must be electrically grounded per national and local electrical code. Select the installation location of indoor units WARNING DO NOT LOCATIONS: DO NOT install the indoor unit in a moist environment. Excessive moisture can corrode the equipment, electrical components, and cause electrical shorts. Areas with strong Coastal areas electromagnetic with high salt waves. content in the air. Areas with oil drilling or fracking. Areas that store flammable materials or gas. Areas where there may be detergent or other corrosive gases in the air, such as bathrooms, or laundry rooms. Areas where the air inlet and outlet may be obstructed. Danger of explosion. Keep flammable materials and vapors, such as gasoline, away from air handler. WARNING MUST BE INSTALLED IN A LOCATION THAT MEETS THE FOLLOWING REQUIREMENTS: A stable position At least 18in(46cm) Securely install the indoor unit on a structure that can support its weight. If the structure is too weak, the unit may fall and cause personal injury, unit and property damage, or death. Place air handler so that heating elements are at least 18 inches (46 cm) above the floor for a garage installation. Failure to follow these instructions can result in death, explosion, or fire. spaciousness Must support the weight of the indoor unit. Enough room for installation and maintenance. Enough room for the connecting pipe and drainpipe. The structure that the equipment is suspended from must support the weight of the indoor unit. 17 WARNING There must be an airtight seal between the bottom of the air handler and the return air plenum. Use fiberglass sealing strips, foil duct tape, caulking, or equivalent sealing method between the plenum and the air handler cabinet to ensure a tight seal. Return air must not be drawn from a room where this air handler or any gas-fueled appliance (i.e., water heater), or carbon monoxide-producing device (i.e., wood fireplace) is installed. Preparation and precautions for indoor unit installation Coil compartment (Access panel Removed) Recommended Distances Between the Indoor Unit The distance between the mounted indoor unit should meet the specifications illlustrated in the following diagram. Horizontal installations Horizontal drain pan Upflow drain pan Minimum clearance of 1 in(25.4mm) all sides WARNING · Please apply sealant around the places where the wires, refrigerant pipes and condensate pipes enter the cabinet. · Use duct tape or flexible sealant to seal closed anyspace around the holes where the drain lines exit the cabinet. Warm air must not be allowed to enter throughany gaps or holes in the cabinet. Air outlet Flexible duct collar 4.9ft/1.5m The outlet side pipe length 4.9ft/1.5m. Vertical installations or NOTICE · Remove all accessories and packing in the air outlet before installation. Fixing instructions: When installed vertically (upward or downward), the lower end of the air outlet needs to be connected to the L-shaped metal air duct and fastened by screws If return air is to be ducted,install duct flush with floor. Set unit on floor over opening.All return air must pass through the coil. 18 Indoor unit parts installation size C B A Model(Btu/h) Dimensions Length of A inch mm Length of B inch mm Length of C inch mm Length of D inch mm Length of E inch mm 12K/18K/24K 45 1143 21 533 17-1/2 445 15-3/4 400 10-1/4 260 30K/36K 49 1245 21 533 21-1/50 534 19-5/16 490 10-1/4 260 42K/48K/60K 53 1346 21 533 24-1/2 622 22-27/32 580 10-1/4 260 Recommended size of filter (unit: inch/mm) (unit: inch/mm) NOTE: The user needs to purchase a standard filter that meets the requirements of UL900. If you have questions about the selection of filters, consult the manufacturer. Model(Btu/h) Length of W Length of D Length of t inch mm inch mm inch mm 18K-24K 16 406.4 20 508 1 25.4 30K-36K 20 495.3 20 508 1 25.4 48K-60K 23 584.2 20 508 1 25.4 19 Installation Position Requirements Vertical installations NOTICE FOR DUCT CONNECTIONS Horizontal installations It should be assembled It should be insulated accordance to the and use a Vapor Barrier. instructions. It should be Flexible suspension mounted and not fastened It should be fabricated and installed in accordance with local and/or national codes. More Requirements · Air supply and return may be handled in one of several ways best suited to the installation (See table for dimensions for duct inlet and outlet connections). The vast majority of problems encountered with combination cooling systems can be linked to improperly designed or installed duct systems. It is therefore highly important to the success of an installation that the duct system be properly designed and installed. Use flexible duct collars to minimize the transmission of vibration/noise into the conditioned space. Where return air duct is short, or where sound could potentially to be a problem, sound absorbing liner should be used inside the duct. · Duct must be insulated where it runs through an unconditioned space during the cooling season. The use of a vapor barrier is recommended to prevent absorption of moisture from the surrounding air into the insulation. · The supply air duct connection should be properly sized by use of a transition to match unit opening. · All ducts should be suspended using flexible hangers and never fastened directly to the structure. This unit is not designed for nonducted (freeblow) applications. · Duct work should be fabricated and installed in accordance with local and/or national codes. 20 CAUTION A field-fabricated secondary drain pan, with a drain pipe to the outside of the building, is required in all installations over a finished living space or in any area that may be damaged by overflow from the main drain pan. In some localities, local codes may require a secondary drain pan for any horizontal installation. Selection of installation direction Di erent installation directions The units can be installed in a vertical (down and up)and Horizontal(right and left) configuration. NOTICE · For horizontal installation a secondary drain pancnot suppliedmust be installed. Vertical up Horizontal At least 5in(127mm) Airflow direction of di erent installation directions Horizontal left Upflow Downflow Horizontal right NOTICE · Vertical up and horizontal left installation does not need to change the direction of evaporator. 21 Connecting the wire and pipes(pipes and drainage pipes) Please follow these steps to perform Vertical down installation and Horizontal right installation: Step 1 Open the upper cover. Step 2 Open the cover of the electronic control box. Step 3 Connect the wire according to the wiring diagram. Step 4 Connect the pipes and install the drainage pipes. Down flow and horizontal right instructions NOTICE The unit may be installed in one of the upflow, downflow, horizontal left or horizontal right orientations. Then remove the second cover plate. Step 1 Remove the filter door, then take the filter o . Step 2 Remove the upper cover assembly. Remove the bottom cover first. Step 3 Remove evaporator cover plate. 22 Step 4 Indication of the position of each temperature sensor of the evaporator: 12-24K model Step 5 Unplug temperature sensors T1, T2, T2A, T2B, refrigerant detection sensor and electronic expansion valve (EEV) from the control board. T1: IDU room temp. sensor(T1) T2: IDU coil temp. sensor(T2) T2A: Evaporator coil temperature sensor(T2A) T2B: Evaporator coil inlet temperature sensor(T2B) T2B T1 30-36K model T2B T1 42-60K model T2B T2 EEV T2A T2 T2A&T2B T2 EEV refrigerant detection sensor T1 EEV Step 6 T2A Remove T1, T2, T2A, T2B, EEV, refrigerant detection sensor wire ties. T2 EEV T2A T1 Refrigerant detection sensor 23 Step 6 Take out the evaporator and drain pan and rotate 180° (when your equipment need to be vertical downed configuration). Step 9 Reinstall T1, T2, T2A, T2B sensor plugs and electronic expansion valve (EEV) and tie up the sensor wires. Step 7 Adjust the mounting parts position according to the direction of equipment. Cut the foam gasket. Remove knockouts as shown in the figure. Step 8 Reinstall the evaporator and drain pan. Hook the wire into the buckle and go down from the wire slot. Replace foam gasket over wires. NOTICE The wire body needs to pass through the wire groove from the drain pan and be stuck on the hook of the drain pan. 24 Step 10 The evaporator is assembled in place. Step 11 Use cable ties to fix the room temperature sensor as shown in the figure. cable ties Step 13 Connect the wire according to the wiring diagram. Step 14 Reassenble the upper cover and Reinstall the filter, filter cover plate. Step 12 Reinstall evaporator cover plate. Step 15 Connect the pipes and install the drainage pipes. CAUTION FOR ALL PIPES INSTALLATION · Insulate all piping to prevent condensation, which could lead to water damage. · The drainpipe is used to drain water away from the unit. If the drainpipe is bent or installed incorrectly, water may leak and cause a water-level switch malfunction. · In HEAT mode, the outdoor unit will discharge water. Ensure that the drain hose is placed in an appropriate area to avoid water damage and icy conditions on walkways. · DO NOT pull the drainpipe forcefully. This could disconnect it. NOTICE If installed above a finished living space, a secondary drain pan (as required by many building codes), must be installed under the entire unit and its condensate drain line must be routed to a location such that the user will see the condensate discharge. 25 NOTICE ON PURCHASING PIPES Installation requires pvc pipe or other suitable material per local and national codes, which can be obtained at your local hardware store or dealer. WARNING · After removal of drain pan plug(s), check drain hole(s) to verify that drain opening is fully open and free of any debris. Also check to make sure that no debris has fallen into the drain pan during installation that may plug up the drain opening. Seal around the exiting drain pipe, liquid and suction lines to prevent infiltration of humid air. · On units of this type, where the blower "draws" rather than "blows" air through the coil, traps must be installed in the condensate drain lines (primary and auxiliary, if used). Traps prevent the blower from drawing air through the drain lines into the air supply. Vertical Installations These units operate with a negative pressure at the drain connections and a drain trap is required. The trap needs to be installed as close to the unit as possible. Make sure the top of the trap is below the connection to the drain pan to allow complete drainage of the pan. Vertical discharge Primary drain Main drain hole The second drain hole >2in(50mm) >2in(50mm) >2in(50mm) NOTICE Horizontal runs must also have an anti-siphon air vent(standpipe) install ahead of the horizontal run to eliminate air trapping. NOTE ON DRAINPIPE INSTALLATION · The Figure shows how to trap or plug all drains during vertical discharge. · The Figure shows how to trap or plug all drains during right-hand discharge. · The seal plug are supplied as accessories and should be screwed tightly only by hand. · Incorrect installation could cause water to flow back into the unit and flood CAUTION · The drainpipe outlet should be at least 5cm(1.9in) above the ground. If it touches the ground, the unit may become blocked and malfunction. 26 REFRIGERANT PIPING CONNECTION WARNING All field piping must be completed by a licensed technician and must comply with the local and national regulations. · When the air conditioner is installed in a small room, measures must be taken to prevent the refrigerant concentration in the room from exceeding the safety limit in the event of refrigerant leakage. If the refrigerant leaks and its concentration exceeds its proper limit, hazards due to lack of oxygen may result. · When installing the refrigeration system, ensure that air, dust, moisture or foreign substances do not enter the refrigerant circuit. Contamination in the system may cause poor operating capacity, high pressure in the refrigeration cycle, explosion or injury. · Ventilate the area immediately if there is refrigerant leakage during the installation. Leaked refrigerant gas is both toxic and may be flammable. Ensure there is no refrigerant leakage after completing the installation work. Notes on pipe length and elevation The maximum length and drop height based on models.(Unit:ft./m) Capacity (Btu/h) MaxLength of piping ft. m Maximum drop height ft. m 12K/18K 98.4 30 65.6 20 24K/30K 164 50 82 25 36K/42K/48K/60K 246 75 98.4 30 Ensure that the length of the refrigerant pipe, the number of bends, and the drop height between the indoor and outdoor units meets the requirements shown in the table next to it NaNmaeme MModoedl el 12K/18K Connecting pipe assembly 24K 30K 36K 42K/48K 60K PipPiepessppeecciifificcaatiotnion LiLqiquuiid SSididee GaGsasSSiiddee Ø3/8in(Ø9.52mm) Ø3/4in(Ø19mm) Ø3/8in(Ø9.52mm) Ø3/4in(Ø19mm) Ø3/8in(Ø9.52mm) Ø3/8in(Ø9.52mm) Ø3/4in(Ø19mm) Ø3/4in(Ø19mm) Ø3/8in(Ø9.52mm) Ø3/4in(Ø19mm) Ø3/8in(Ø9.52mm) Ø3/4in(Ø19mm) Remark Pipes are not included in the accessories and you need to purchase it separately from the local dealer. CAUTION Oil traps If oil flows back into the outdoor unit's compressor, this might cause liquid compression or deterioration of oil return. Oil traps in the rising gas piping can prevent this. An oil trap should be installed every 20ft(6m) of vertical suction line riser (36000Btu/h unit). An oil trap should be installed every 32.8ft(10m) of vertical suction line riser (36000Btu/h unit). Oil trap Gas piping Indoor unit/ Outdoor unit Indoor unit/ Outdoor unit 20ft(6m) (<36000Btu/h unit) 32.8ft(10m) Liquid piping(36000Btu/h unit) 20ft(6m) (<36000Btu/h unit) 32.8ft(10m) (36000Btu/h unit) 27 Connection Instructions--Refrigerant Piping CAUTION · Insulate both the gas and liquid piping to prevent condensation. Air Handler Air Handler Unit Adapter Required at Air Outdoor Unit Model Connection(in.flare) Handler Unit (in.flare to braze) Model Liquid 12K/18K/24K/ 3/8 30K/36K/ 42K/48K/60K Gas 3/4 3/8 are¹3/8braze 3/4 are¹3/4braze 12K/18K (Standard Heat) 18K (Ext. Heat) 30K/36K/42K/ 60K Outdoor Unit Connection (in.flare) Liquid 3/8 Gas 5/8 Liquid 3/8 Gas 3/4 Adapter Required at Outdoor Unit (in.flare to flare or braze) 3/8 are¹3/8braze 5/8 are¹3/4 are 5/8 are¹3/4braze 3/8 are¹3/8braze 3/4 are¹3/4braze Step 1: Cut pipes When preparing refrigerant pipes, take extra care to cut and flare them properly. This will ensure e cient operation and minimize the need for future maintenance. Measure the distance between the · indoor and outdoor units. Using a pipe cutter, cut the pipe a · little longer than the measured distance. Make sure that the pipe is cut at a · perfect 90° angle. Step 2: Remove burrs Burrs can a ect the air-tight seal of refrigerant piping connection. They must be completely removed. · Hold the pipe at a downward angle to prevent burrs from falling into the pipe. · Using a reamer or deburring tool, remove all burrs from the cut section of the pipe. Pipe Reamer Point down 90° Oblique Rough Warped DO NOT DEFORM PIPE WHILE CUTTING Be extra careful not to damage, kink, or deform the pipe while cutting. This will drastically reduce the heating performance. Step 3: Flare pipe ends Proper flaring is essential to achieve an airtight seal. · After removing burrs from cut pipe, seal the ends with PVC tape to prevent foreign materials from entering the pipe. · Sheath the pipe with insulating material. · Place flare nuts on both ends of pipe. Make sure they are facing in the right direction, because you can't put them on or change their direction after flaring. Flare nut Copper pipe · Remove PVC tape from ends of pipe when ready to perform flaring work. 28 · Clamp flare from on the end of the pipe. The end of the pipe must extend beyond the flare form. Flare form Outdoor unit Liquid side piping (Smaller diameter) (Bigger Pipe · Place flaring tool onto the form. · Turn the handle of the flaring tool clockwise until the pipe is fully flared. PIPING EXTENSION BEYOND FLARE FORM Pipe gauge Tightening torque 3/8in 32-39 N.m (9.52mm) (320-390kgf.cm) Flare dimension(A) Min. Max. 0.52in 0.53in (13.2mm) (13.5mm) 5/8in 57-71 N.m 0.76in 0.78in (16mm) (570-710kgf.cm) (19.2mm) (19.7mm) 3/4in 67-101 N.m 0.91in 0.93in (19mm) (670-1010kgf.cm) (23.2mm) (23.7mm) Flare shape · Remove the flaring tool and flare form, then inspect the end of the pipe for cracks and even flaring. Step 4: Connect pipes Connect the copper pipes to the indoor unit first, then connect it to the outdoor unit. You should first connect the low-pressure pipe, then the highpressure pipe. · When connecting the flare nuts, apply a thin coat of refrigeration oil to the flared ends of the pipes. · Align the center of the two pipes that you will connect. · Tighten the flare nut snugly by hand. · Using a wrench, grip the nut on the unit tubing. · While firmly gripping the nut, use a torque wrench to tighten the flare nut according to the torque values in above table. NOTICE Use both a spanner and a torque wrench when connecting or disconnecting pipes to/from the unit. Torque wrench CAUTION Ensure to wrap insulation around the piping. Direct contact with the bare piping may result in burns or frostbite. · Make sure the pipe is properly connected. Over tightening may damage the bell mouth and under tightening may lead to leakage. NOTICE MINIMUM BEND RADIUS Carefully bend the tubing in the middle according to the diagram below. DO NOT bend the tubing more than 90° or more than 3 times. Use appropriate tool min-radius 3.9in(100mm) · After connecting the copper pipes to the indoor unit, wrap the power cable, signal cable and the piping together with binding tape. NOTICE DO NOT intertwine or cross the signal cable with any other wiring. 29 · Thread this pipeline through the wall and connect it to the outdoor unit. · Insulate all the piping, including the valves of the outdoor unit. · Open the stop valves of the outdoor unit to start the flow of the refrigerant between the indoor and outdoor unit. CAUTION Check to make sure there is no refrigerant leak after completing the installation work. If there is a refrigerant leak, ventilate the area immediately and evacuate the system (refer to the Air Evacuation section of this manual). Air-Handler Air Conditioners Refrigerant Piping Connection Correct Refrigerant piping Connecting installation methods Plan 1 After the unit is installed, wrap the piping and brass fitting with foam tape. Plan 2 Braze connection Insulation sleeve You need to wrap all the connected copper pipes, nuts and other metal parts into the sponge. 30 INSTALLATION OF ELECTRIC AUXILIARY HEAT MODULE (ONLY FOR HEAT FUNCTION MODELS) NOTICE Installation must be performed by an licensed contractor. Please make necessary precaution when performing the installation operation. Accessories Name Manual Foam gasket Screws Quantity Name Quantity 2 Silicone breaker cover 1 1 Electric auxiliary heating wiring diagram 1 7 Circuit breaker label 1 Model size selection For installations requiring supplemental heating, the optional Electric Auxiliary Heat Module is available in sizes from 3kW to 25kW to accommodate appropriate sizing given the specific heat load and electrical requirements of each installation. Please refer to the table below for selection of available sizes of each outdoor unit model, being sure to avoid improper matching. OUTDOOR UNIT MODEL 12K/18K 24K 30K 36K 42K/48K 60K NOTICE Only use matched modules certified for use with model. Please refer to the Electric Auxiliary Heat Model specification for additional details to ensure proper selection and installation. Preparations for Installation Before installation, please confirm the electric auxiliary heat module and supplied accessories are complete and free of any damage. Do not attempt to install if damage is present. Electric Auxiliary Heat Module installation and Wiring Operation Step 1 Open the upper cover. Step 2 Use tools to remove the knock-out holes of upper cover. 31 Step 3 Remove the terminal block and power wires, loosen the screws, and remove the electric auxiliary heating cover.Remove the power cable terminal CN11 on the mainboard. Step 5 Tighten the mounting screws. screws. Step 4 Install the electric auxiliary heating assembly the front, and note that the support assembly must lock into the support holes in the back of the cabint. shell assembly hole Step 6 Wire according to the wiring nameplate. Apply the wiring diagram to the inside cover wiring is completed for future reference and maintenance.Plug the electric heating plugs CN11 and CN12 into the main board. Step 7 Install the upper cover,and the silicone breaker cover. This figure shows the top view perspective Step 8 After installing the electric auxiliary heat module, apply the circuit breaker label near the silicone breaker cover that was just applied. NOTE: The circuit breaker cannot be operated by user. 32 CONFIRMATION OF INDOOR UNIT NOTICE Electric auxiliary heating wiring diagram packed with the accessories. If branch circuit wire lenght exceeds 100 ft, consult NEC 210-19a to determine maximum wire length. Use 2% voltage drop. After the electric heating wiring is connected, please confirm before power on: · Check all wiring and ensure secure connection of all wiring. · Ensure that wire size is properly selected per NEC or local codes. Specifications Number of circuit breakers Number of relays Number of power cord groups Number of power cord grounding screws Units without electrical heat UNIT SIZE 12K/18K 24K 30K 36K 42K/48K 60K VOITS-PHASE 115/208/230V-1 115/208/230V-1 115/208/230V-1 115/208/230V-1 115/208/230V-1 115/208/230V-1 Rated current 115V: 4.4A 208/230V: 3.0A 115V: 4.4A 208/230V: 3.0A 115V: 6.4A 208/230V: 4.5A 115V: 6.4A 208/230V: 4.5A 115V: 11.5A 208/230V: 8.3A 115V: 11.5A 208/230V: 8.3A MCA (Minimum Circuit Ampacity) 115V: 5.5A 208/230V: 4.0A 115V: 5.5A 208/230V: 4.0A 115V: 8.0A 208/230V: 6.0A 115V: 8.0A 208/230V: 6.0A 115V: 14.5A 208/230V: 11.0A 115V: 14.5A 208/230V: 11.0A BRANCH CIRCUIT MIN WIRE SIZE AWG* 14# FUSE/CKT BKR AMPS 14# 14# 14# 14# 14# Use copper wire only to connect unit. If other than uncoated (non-plated) 75°C copper wire (solid wire for 10 AWG and smaller, stranded wire for larger than 10 AWG) is used consult applicable tables of the National Electric Code (ANSI/NFPA 70). NOTICE The specification may be di erent between di erent models ,please refer to indoor unit's nameplate. Choose the cable type according to the local electrical codes and regulations. Please choose the right cable size according to the Minimum Circuit Ampacity indicated on the nameplate of the unit. 33 EAH-03C(UL) EAH-05C(UL) EAH-08C(UL) EAH-10C(UL) EAH-15C(UL) EAH-20C(UL) EAH-25C(UL) OUTDOOR UNIT INSTALLATION NOTICE Install the unit by following local switchs and regulations , there may be di er slightly between di erent regions. Select the installation location of outdoor units Before installing the outdoor unit, you must choose an appropriate location. The following are standards that will help you choose an appropriate location for the unit. Proper installation locations meet the following standards: Firm and solid--the location can support the unit and will not vibrate. Noise from the unit will not disturb other people. Good air circulation and ventilation. Where snowfall is anticipated, take appropriate measures to prevent ice buildup and coil damage. or4min(o1r0e0mm) 20in(500mm) or more when front and sides of the unit are clear 15cm(6in) The outdoor unit must be installed on risers of at least 15cm(6in) in height or per local code to get unit above local mean snow fall. or4min(o1r0e0mm) 20in(500mm) or more when front and sides of the unit are clear 20in(500mm) or more when any 2 sides of left, right and rear of the unit are clear 4oinr(m10o0rme m) o1r4mino(3re50mm) 20in(500mm) or more when any 2 sides of left, right and rear of the unit are clear Meets all spatial requirements shown in Installation Space Requirements above. 4oinr(1m0o0rme m) o1r4mino(3re50mm) 35 DO NOT install unit in the following locations: Near an obstacle that will block air inlets and outlets. In a location that is exposed to large amounts of dust. Near animals or plants that will be harmed by hot air discharge. Near any source of combustible gas Near a public street, crowded areas, or where noise from the unit will disturb others. CAUTION: SPECIAL CONSIDERATIONS FOR EXTREME WEATHER If the unit is exposed to heavy wind: Install unit so that air outlet fan is at a 90° angle to the direction of the wind. If needed, build a barrier in front of the unit to protect it from extremely heavy winds. See Figures below. If the unit is frequently exposed to heavy rain or snow: Build a shelter above the unit to protect it from the rain or snow. Be careful not to obstruct air flow around the unit. Strong wind Wind Baffle Shelter Strong wind 90° angle to the direction of the wind Strong wind Build a wind Ba e to protect the unit Build a shelter to protect the unit Install drain joint(Heat pump unit only) Before bolting the outdoor unit in place, you must install the drain joint at the bottom of the unit. Note that there are two di erent types of drain joints depending on the type of outdoor unit. lf the drain joint comes with a rubber seal(see Fig.A ), do the following: 1. Fit the rubber seal on the end of the drain joint that will connect to the outdoor unit. 2. Insert the drain joint into the hole in the base pan of the unit. 3. Rotate the drain joint 90° until it clicks in place facing the front of the unit. 4. Connect a drain hose extension (not included) to the drain joint to redirect water from the unit during heating mode. If the drain joint doesn't come with a rubber seal (see Fig. B ), do the following: 1. Insert the drain joint into the hole on the base pan, press firmly to ensure it is properly installed and will not become loose. 2. Connect a drain hose extension (not included) to the drain joint to redirect water from the unit during heating mode. 36 IN COLD CLIMATES In cold climates, make sure that the drain hose is as vertical as possible to ensure swift water drainage.If water drains too slowly, it can freeze in the hose and flood the unit. Anchor outdoor unit The outdoor unit can be anchored to the ground or to a wall-mounted bracket with bolt(M10). Prepare the installation base of the unit according to the dimensions below. Outdoor Unit Types and Specifications or4min(o1r0e0mm) 20in(500mm) or more when front and sides of the unit are clear 4oinr(1m0o0rme m) 20in(500mm) H or more when any 2 sides of left, right and rear of the unit are clear o1r4mino(3re50mm) H A D B W W Front view 37 Top view W inch 31-11/16 35 37-1/4 38-19/32 37-1/2 Outdoor Unit Dimensions H D mm inch mm inch mm 805 21-13/16 554 13 330 890 26-1/2 673 13-15/32 342 946 31-29/32 810 16-5/32 410 980 38-3/8 975 16-11/32 415 952 52-1/2 1333 16-11/32 415 Mounting Dimensions A B inch mm inch mm 20-1/8 511 12-1/2 317 26-1/8 663 13-15/16 354 26-1/2 673 15-7/8 403 24-1/4 616 15-5/8 397 24-35/36 634 15-29/32 404 (unit: inch/mm) H o9r.8mino(r2e50mm) o9r.8mino(2re50mm) 59ino(1r5m00ormem) 23.6oinr 6m0o0remm) 118in(3000mm) or more L A Rows of series installation The relations between H, A and L are as follows. L A L H L 1/2H 1/2H < L H 9-13/16in(250mm) or more 11-13/16in(300mm) or more L > H Can not be installed If you will install the unit on the ground or on a concrete mounting platform, DO THE FOLLOWING: ° Mark the positions for four expansion bolts based on dimensions chart. ° Pre-drill holes for expansion bolts. ° Place a nut on the end of each expansion bolt. ° Hammer expansion bolts into the pre-drilled holes. ° Remove the nuts from expansion bolts, and place outdoor unit on bolts. ° Put washer on each expansion bolt, then replace the nuts. ° Using a wrench, tighten each nut until snug. WARNING WHEN DRILLING INTO CONCRETE, EYE PROTECTION IS RECOMMENDED AT ALL TIMES. If you will install the unit on a wall-mounted bracket, DO THE FOLLOWING: ° Mark the position of bracket holes based on dimensions chart. ° Pre-drill the holes for the expansion bolts. ° Place a washer and nut on the end of each expansion bolt. ° Thread expansion bolts through holes in mounting brackets, put mounting brackets in position, and hammer expansion bolts into the wall. ° Check that the mounting brackets are level. ° Carefully lift unit and place its mounting feet on brackets. ° Bolt the unit firmly to the brackets. ° If allowed, install the unit with rubber isolator pads o reduce vibrations and noise. CAUTION Make sure that the wall is made of solid brick, concrete, or of similarly strong material. The wall must be able to support at least four times the weight of the unit. 38 WIRING PRECAUTIONS WARNING BEFORE PERFORMING ANY ELECTRICAL WORK, READ THESE WARNINGS. ° All wiring must comply with local and national electrical codes, regulations and must be installed by a licensed electrician. ° All electrical connections must be made according to the Electrical Connection Diagramlocated on the panels of the indoor and outdoor units. ° If there is a serious safety issue with the power supply, stop work immediately. Explain your reasoning to the client, and refuse to install the unit until the safety issue is properly resolved. ° Power voltage should be within 90-110% of rated voltage. Insu cient power supply can cause malfunction, electrical shock, or fire. ° Installation of an external surge suppressor at the outdoor disconnect is recommended. ° If connecting power to fixed wiring, a switch or circult breaker that disconnects all poles and has a contact separation of at least 1/8in (3mm) must be incorporated in the fixed wiring. The qualified technician must use an approved circuit breaker or switch. ° Only connect the unit to an individual branch circuit. Do not connect another appliance to that Circuit. ° Make sure to properly ground the air conditioner. ° Every wire must be firmly connected. Loose wiring can cause the terminal to overheat, resulting in product malfunction and possible fire. ° Do not let wires touch or rest against refrigerant tubing, the compressor, or any moving parts within the unit. ° To avoid getting an electric shock, never touch the electrical components soon after the power supply has been turned o . After turning o the power, always wait 10 minutes or more before you touch the electrical components. ° Make sure that you do not cross your electrical wiring with your signal wiring. This may cause distortion, interference or ° possibly damage to circuit boards. ° No other equipment should be connected to the same power circuit. ° Connect the outdoor wires before connecting the indoor wires. WARNING BEFORE PERFORMING ANY ELECTRICAL OR WIRING WORK, TURN OFF THE MAIN POWER TO THE SYSTEM. Wiring overview Circuit breaker Circuit breaker Circuit breaker Electrical heater unit power wires NOTICE The diagrams are for explanation purpose only. Your machine may be slightly di erent. The acyual diagram shall prevail. 39 OUTDOOR UNIT WIRING WARNING Before performing any electrical or wiring work, turn o the main power to the system. Step 1: Prepare the cable for connection. 1. You must first choose the right cable size. 2. Using wire strippers, strip the rubber jacketfrom both ends of the signal cable to reveal approximately 5.9in(150mm) of wire. 3. Strip the insulation from the ends. 4. Stranded wire requires u-lugs or ring terminals to be crimped onto the ends of the wire. NOTICE ° When connecting the wires, strictly follow the wiring diagram found inside the electrical box cover. ° Choose the cable type according to the local electrical switchs and regulations. ° Please choose the right cable size according to the Minimum Circuit Ampacity indicated on the nameplateof the unit. Step 2: Remove the electric cover. Remove the electric cover of the outdoor unit. If there is no cover on the outdoor unit, take o the bolts from the maintenance board and remove the protection board. Cover 208/230V~60Hz Power Supply S1 S2 OUTDOOR UNIT Nonpolar RS-485 communication Low voltage L1 L2 Outdoor Unit Power Supply 208/230V 4. Clamp down the cable with the cable clamp. 5. Insulate unused wires with electrical tape. Keep them away from any electrical or metal parts. 6. Reinstall the cover of the electric control box. In North America 1. Remove the wire cover from the unit by loosening the 3 screws. 2. Remove caps on the conduit panel. 3. Mount the conduit tubes(not included) on the caonduit panel. 4. Properly connect both the power supply and low voltage lines to the corresponding terminals on the terminal block. 5. Ground the unit in accordance with local switchs. 6. Be sure to size each wire allowing several inches longer than the required length for wiring. Screw Step 3: Connect the u-lugs to the terminals Match the wire colors/labels with the labels on the terminal block. Firmly screw the u-lug of each wire to its corresponding terminal. L1 L2 L1 L2 TO POWER SOURCE TO POWER SOURCE B W D R C Y1 Y2 L S2 S1 B W D R C Y1 Y2 L S2 S1 Terminal block (O40vmerm1-)9/16in Connecting cable G Power supply cord Conduit panel Wire Cover Please select the appropriate through-hole according to the diameter of the wire. WARNING ISOLATE THE POWER SUPPLY LEADS AND COMMUNICATION LEADS BY THE STRAIN RELIF AND KEEP POWER SUPPLY LEADS AWAY FROM COMMUNICATION LEADS. Outdoor Unit A Outdoor Unit B 40 INDOOR UNIT WIRING CAUTION · While connecting the wires, please strictly follow the wiring diagram. · The refrigerant circuit can become very hot. Keep the interconnection cable away from the copper tube. Step 1: Prepare the cable for connection. 1. Using wire strippers, strip the insulating jacket from both ends of the signal cable to reveal about 5.9in(150mm) of the wire. 2. Strip the insulation from the ends of the wires. Step 2: Open the front panel of the indoor unit. Using a screwdriver,remove the cover of the electric control box on your indoor unit. Step 3: Connect the wires to the terminals. 1. Thread the power cable and the signal cable through the wire outlet 2. Match the wire colors/labels with the labels on the terminal block. Firmly screw the wires of each wire to its corresponding terminal. Refer to the Serial Number and Wiring Diagram located on the cover of the electric control box. Terminal block wiring. When using 208V or 230V,connect L1 and L2. When using 115V,connect L1 and L2 (L2 is used as N). Class2 wire Power wire TO POWER SOURCE OR OUTDOOR 115/208/230V~60Hz Power Supply Wiring diagram WARNING ISOLATE THE POWER SUPPLY LEADS AND COMMUNICATION LEADS BY THE STRAIN RELIF AND KEEP POWER SUPPLY LEADS AWAY FROM COMMUNICATION LEADS. 3. Clamp down the cable with the cable clamp. The cable must not be loose or pull on the u-lugs. 4. Reattach the electric box cover. 5. Clamp down the cable with the cable clamp. The cable must not be loose or pull on the u-lugs. 6. Reattach the electric box cover CAUTION · While connecting the wires, please strictly follow the wiring diagram. · The refrigerant circuit can become very hot. Keep the interconnection cable away from the copper tube. · The holes on cover of the electronic control box must be threaded through with armored wires. WARNING The motor has two pairs of plugs. The red color indicates that the motor is connected to the plug when powered by 115V, and the white color indicates that the motor is connected to the plug when powered by 230V (default is connected to the white pair of plugs). When using a 208-230V power supply, this part remains unchanged; When using a 115V power supply, the motor wiring requires the use of a 115V motor pair plug. At this time, the white motor pair plug needs to be removed and the red motor pair plug needs to be connected. When the motor is plugged in red, the internal power supply must be 115V. If it is powered by a 208-230V power supply, the motor will be damaged. L1 L2 Indoor Unit Power Supply 115/208/230V S1 S2 Nonpolar RS-485 communication Low voltage INDOOR UNIT 41 INSTALLATION GUIDE FOR AHU USING 115V POWER SUPPLY Step 1: Remove the two screws Open the upper cover Step 2: When using 115V power supply, the fan motor wiring requires the use of 115V fan motor pair plug. At this time, the white fan motor pair plug needs to be removed and the red fan motor pair plug needs to be connected. Step 5: Remove the blue connector from the control board CN12. EEV T2A&T2B T2 refrigerant detection sensor CN12 CN11 T1 Step 6: Remove the red connector from the 24V transformer. Step 3: Unplug temperature sensors T1, T2, T2A, T2B,refrigerant detection sensor and electronic expansion valve (EEV),and fan motor power pair plugcCN11 from the control board. T1: IDU room temp. sensor(T1) T2: IDU coil temp. sensor(T2) T2A: Evaporator coil temperature sensor(T2A) T2B: Evaporator coil inlet temperature sensor(T2B) CN12 CN11 Step 7: Take the 24V transformer connection wire out from the accessory package. Connect the red connector to the 24V transformer and the blue connector to the control board CN12. Step 4: Remove the two screws in electric cabinet.And take out electric cabinet. 42 Step 7: Replace the electronic control box with the entire machine, fix it with screws, and insert the wire body properly. Plug temperature sensors T1, T2, T2A, T2B, refrigerant detection sensor and electronic expansion valve(EEV), and fan motor power pair plug(CN11) from the control board. CN12 CN11 Remove the two screws SPECIFIC WIRING METHODS WARNING Please refer to the wiring nameplate for the wiring method. Do not connect the power cord to the communication line, as this may damage the system. Connection method A: Refer to the wiring method of internal and external machine communication: Connection method B: To use a 24V thermostat, you need to refer to the following wiring: 43 Y/Y2 COM OY2 OY1 OB/O OW S4-2 Default on, DH function off. Turn switch off to activate DH function. S4-4 Default on, W1 and W2 shorted for single stage Aux heat operation. Turn off to separate stages. Y/Y2 COM OY2 OY1 OB/O OW S4-2 Default on, DH function off. Turn switch off to activate DH function. S4-4 Default on, W1 and W2 shorted for single stage Aux heat operation. Turn off to separate stages. Y/Y2 COM OY2 OY1 OB/O OW Y/Y2 COM OY2 OY1 OB/O OW S4-2 Default on, DH function off. Turn switch off to activate DH function. S4-4 Default on, W1 and W2 shorted for single stage Aux heat operation. Turn off to separate stages. Y/Y2 COM OY2 OY1 OB/O OW S4-4 Default on, W1 and W2 shorted for single stage Aux heat operation. Turn off to separate stages. Y/Y2 COM OY2 OY1 OB/O OW S4-2 Default on, DH function off. Turn switch off to activate DH function. Y/Y2 COM OY2 OY1 OB/O OW 44 Y/Y2 COM OY2 OY1 OB/O OW Optional function wiring: Condensate overflow switch: The unit will accommodate a remote condensate overflow switch. To enable, remove jumper J7, and connect the installer provided condensate overflow device to CN23 per below. When an overflow condition is present, the device should open connection signaling the unit to turn o the system. The fault warning: Alarm output: An alarm output (CN33) can be utilized if actions are required when a fault is present. This is a passive outlet port, so you will need to input a voltage signal. The relay is normally-open for normal operation, and closed when a fault condition is active. Humidifier control: To connect a humidifier, utilize the passive signal "WORK" output (CN23) port as well as the R and C wires on the controller, and wire the humidistat and humidifier per above wiring diagram. When the fan is running, the CN23 relay will be closed, which will allow power to the humidifier when the humidistat is below humidity setpoint. If the thermostat or zone controller has an HUM interface, connect the humidifier directly to the HUM and C ports. CN23 J7 45 UV,fresh air or ion generator wiring The WORK port is linked with the fan. When the fan is running, the relay is closed. Control logic Indoor unit connector Connector Purpose Low Demand High Demand LED display The control displays unit status as well as any active fault codes on the LED display. If the unit is functioning normally, the LED will display current temperature setpoint. When a fault code is active, the display will flash quickly the active fault code. Please refer to the fault code table located in the troubleshooting section of the manual for detailed fault code information. KEY1 Instructions (For Wired Controller only) ° Press KEY1 to enter the forced automatic mode, press KEY1 again to enter the forced cooling mode (LED display FC), and press KEY1 again to shut down. ° Long press KEY1 under forced cooling mode (LED display FC) 5s to enter forced defrost mode. DS Reserved Signal Outdoor unit connector Connector Purpose Low Demand High Demand Defrost control 46 DIP switch definitions Function Rotary switch Function DIP swich Static pressure DIP swich KEY1 Function DIP swich Led display NON-POLARITY WIRED CONTROLLER To CCM COMMUNICATION COMM. Bus TO OUTDOOR UNIT 47 Function DIP switch settings: The 24V thermostat mode needs to refer to the following settings: Function combination table of SW1-1 and SW1-4: SW1 Control type IDU and ODU Connection Note Wired controller / 24V thermostat (S1+S2) / 24V connection Auto Discovery Wired controller S1+S2 Scenario 2 000 is the default 000/001/010/ 011/100/101/110/111,internal machines with di erent abilities, electric heating and PSC classification for use. 24V Thermostat S1+S2 Scenario 1 24V Thermostat 24V connection Scenario 3 Indoor unit dial code No. Dial Code Control Scenario Function ON 1 SW1-2 1,2,3 Anti-cold blow protection option NO OFF [Default] YES Note 2 SW1-3 1,2,3 Single cooling / heating and and cooling options Cooling [Default] Cooling & Heating 3 SW2-1 1 4 SW2-1 2 5 SW2-2 2 6 SW2-3 2 7 SW2-4 1 8 SW2-4 2 9 Rotary Switch S3 1,2 10 SW3-1 1 11 SW3-2 12 SW3-3 13 SW3-3 14 SW3-4 SW4-1 15 SW4-2 SW4-3 16 SW4-4 1 1 2 1,3 1,2,3 2 17 S4-4 1,3 Compressor Running (demand working with heat pump+ Electric heat) Temperature di erential to activate first stage auxiliary heat(the GAP of T1 and Ts),Wire controller demand with heat pump+Electric heat working together Compressor slower speed 21 [Default] Faster Compressor [Default] 4 2 Only a ects compressor and W1 Electric heat on delay Electric auxiliary heating delay to start time YES 30 minutes [Default]NO [Default] 15 minutes Based on SW2-2 is ON Compressor Compressor/Auxiliary heat outdoor ambient lockout Set outdoor temperature Limitation (for auxiliary heating or compressor) The operation of heat pump is limited by the outdoor temperature, and the operation of auxiliary heat is not limited.The system makes judgments according to the following rules: 1) The compressor can be operated when the outdoor temperature is S3 DIP switch temperature +2 °C. 2) The compressor cannot be operated when the outdoor temperature is lower than the S3 DIP switch temperature. The operation of heat pump is limited by the outdoor temperature, and the operation of auxiliary heat is not limited.The system makes judgments according to the following rules: 1) The compressor can be operated when the outdoor temperature is S3 DIP switch temperature +2 °C. 2) The compressor cannot be operated when the outdoor temperature is lower than the S3 DIP switch temperature. [Default]The operation of heat pump is limited by the outdoor temperature, and the operation of auxiliary heat is not limited. The system makes judgments based on the following rules: 1) The compressor cannot be operated when the outdoor temperature is lower than the S3 DIP switch. 2) The compressor can be operated when the outdoor temperature is S3 DIP switch temperature +2 °C. SW2-4 and S3 need to [Default]Only one heat pump or auxiliary working together heat can be operated .The system makes judgments according to the following rules: 1) When the outdoor temperature is lower than the S3 DIP switch temperature,the compressor is not allowed to operated, but auxiliary heat is allowed to operated ; 2) When the outdoor temperature is S3 DIP switch temperature +2(°C), the compressor can be operated, but auxiliary heat cannot be operated. Table A Maximum continuous runtime allowed before system automatically stages up capacity to satisfy set point. This adds 1 to 5°F to the user set point in the calculated control point to increase capacity and satisfy user set point Cooling and heating Y/Y2 temperature di erential adjustment. Compressor Running (demand working with heat pump+ Electric heat) Temperature di erential to activate second stage auxiliary heating(the GAP of T1 and Ts)Wire controller demand with heat pump+Electric heat working together Fan speed of cooling mode when 24V Thermostat is applied for. Electric heat nominal CFM adjustment Temperature di erential to activate third stage auxiliary heating(the GAP of T1 and Ts)Wire controller demand with heat pump+ Electric heat working together 30 minutes [Default] 90 minutes Compressor slower speed Compressor slower speed [Default] Faster Compressor [Default] Faster Compressor 42 [Default] 6 3 Turbo High Available settings are 000/001/010/011. Each digit corresponds an indiviual swith position. For example [SW4-1 OFF, SW4-2 ON, SW4 -3 OFF] = 010 6°F(3°C) [Default]8°F(4°C) Only a ects compressor Only a ects compressor and W2 Only valid for product which has three stage auxiliary heating. Default ON [Default] For single stage supplemental heat,W1 and W2 are connected For dual stage supplemental heat, W1 and W2 are controlled independently. 48 18 S4-2 19 SW5-3 1,3 1,2,3 20 SW5-4 1,2,3 DH function selection L or Alarm relay selection R output selection [Default] Dehumidification control not available Dehumidification feature is enabled through thermostat L output 24V or alarm relay close only when refrigerant sensor fault or R454B [default] L output 24V or alarm relay refrigerant leakage be detected close when any fault be detected R stop ouput 24V when refrigerant [default] R keep ouput 24V even when sensor fault or R454B refrigerant refrigerant sensor fault or R454B leakage be detected refrigerant leakage be detected 24V Tstat, S1+S2 1 Control Scenario Wired Controller S1+S2 2 Full 24V 3 Address DIP switch: Address dialing S1+SW8: When the user uses the centralized controller, the address dialing is required. Network address: The address silkscreen is NET address, which is composed of a 16-bit address rotary code S1 plus a two-digit DIP switch SW8 [Set during engineering installation, no network function does not need to be set] When SW8 is 00 (the dialing code is not connected), the network address value is the value of S1; When SW8 is 10 (corresponding to the switch of the hardware connected to the 10K resistor), the network address value is S1 plus 16; Determined by dial code SW8 1-10K 2-5.1K When SW8 is 01 (corresponding to the dial code of the 5.1K resistor connected to the hardware is turned on), the network address value is the value of S1 plus 32; When SW8 is 11 (all dialing codes are on), the network address value is the value of S1 plus 48. S3 S3 ( ) 0 OFF 1 -22 2 -18 3 -15 4 -11 5 -8 6 -4 7 3 8 10 9 18 A 25 B 32 C 36 D 39 E 43 F 46 Table A S3 ( ) OFF -30 -28 -26 -24 -22 -20 -16 -12 -8 -4 0 2 4 6 8 Determined by dial code SW8 1-10K 2-5.1K Dial code selection Website address S1 + 48 S1 + 32 S1 + 16 S1 Outdoor unit DIP Switch setting Press the SW4 button 10S for force defrosting SW1 SW4 NO. Dial code Features ON OFF 1 SW1-1 Function to be defined 2 SW1-2 3 SW1-3 Communication dial code Strong cold and strong heat function 24V communication only 24V communication/ 485 communication The cooling/heating target The cooling/heating target pressure compensation value pressure compensation value is valid is invalid 4 SW1-4 Enhanced defrosting function Enhanced defrosting Default setting(standard defrost algorithm) 49 Air volume table Capacity External Static Pressure Range Fan speed 12K (1 ton) & 18K ( 1.5 Ton ) 0 - 0.80 in.wc. Cooling Turbo Cooling High Cooling Medium Cooling Low Heat Pump Turbo Heat Pump High Heat Pump Medium Heat Pump Low Electric auxiliary heat module 0(Default) Electric auxiliary heat module 1 Electric auxiliary heat module 2 24K( 2 Ton ) Electric auxiliary heat module 3 0 - 0.80 in.wc. Cooling Turbo Cooling High Cooling Medium Cooling Low Heat Pump Turbo Heat Pump High Heat Pump Medium Heat Pump Low Electric auxiliary heat module 0(Default) Electric auxiliary heat module 1 Electric auxiliary heat module 2 30K( 2.5 Ton ) 0 - 0.80 in.wc. Electric auxiliary heat module 3 Cooling Turbo Cooling High Cooling Medium Cooling Low Heat Pump Turbo Heat Pump High Heat Pump Medium Heat Pump Low Electric auxiliary heat module 0(Default) Electric auxiliary heat module 1 Electric auxiliary heat module 2 Electric auxiliary heat module 3 24V thermostat Electric auxiliary heat module DIP Switch 24V terminal engaged -- -- -- -- -- -- -- -- 10kW 10kW, 8kW 8kW 5kW, 3kW -- -- -- -- -- -- -- -- 15kW 15kW, 10kW 10kW, 8kW 5kW -- -- -- -- -- -- -- -- 15kW 15kW, 10kW 10kW, 8kW 5kW SW3-4=ON SW3-4=OFF -- -- -- -- -- -- SW4-1=OFF SW4-2=OFF SW4-3=OFF SW4-1=OFF SW4-2=OFF SW4-3=ON SW4-1=OFF SW4-2=ON SW4-3=OFF SW4-1=OFF SW4-2=ON SW4-3=ON SW3-4=ON SW3-4=OFF -- -- -- -- -- -- SW4-1=OFF SW4-2=OFF SW4-3=OFF SW4-1=OFF SW4-2=OFF SW4-3=ON SW4-1=OFF SW4-2=ON SW4-3=OFF SW4-1=OFF SW4-2=ON SW4-3=ON SW3-4=ON SW3-4=OFF -- -- -- -- -- -- SW4-1=OFF SW4-2=OFF SW4-3=OFF SW4-1=OFF SW4-2=OFF SW4-3=ON SW4-1=OFF SW4-2=ON SW4-3=OFF SW4-1=OFF SW4-2=ON SW4-3=ON Y2/Y Y2/Y Y1 -- -- B+Y2/Y, W Y1 -- W1, W2, AUX W1, W2, AUX W1, W2, AUX W1, W2, AUX Y2/Y Y2/Y Y1 -- -- B+Y2/Y, W Y1 -- W1, W2, AUX W1, W2, AUX W1, W2, AUX W1, W2, AUX Y2/Y Y2/Y Y1 -- -- B+Y2/Y, W Y1 -- W1, W2, AUX W1, W2, AUX W1, W2, AUX W1, W2, AUX Wired controller DIP Switch Mode -- Cool -- Cool -- Cool -- Cool -- Heat -- Heat -- Heat -- Heat SW4-1=OFF SW4-2=OFF Heat + AUX, AUX SW4-3=OFF SW4-1=OFF SW4-2=OFF Heat + AUX, AUX SW4-3=ON SW4-1=OFF SW4-2=ON Heat + AUX, AUX SW4-3=OFF SW4-1=OFF SW4-2=ON Heat + AUX, AUX SW4-3=ON -- Cool -- Cool -- Cool -- Cool -- Heat -- Heat -- Heat -- Heat SW4-1=OFF SW4-2=OFF Heat + AUX, AUX SW4-3=OFF SW4-1=OFF SW4-2=OFF Heat + AUX, AUX SW4-3=ON SW4-1=OFF SW4-2=ON Heat + AUX, AUX SW4-3=OFF SW4-1=OFF SW4-2=ON Heat + AUX, AUX SW4-3=ON -- Cool -- Cool -- Cool -- Cool -- Heat -- Heat -- Heat -- Heat SW4-1=OFF SW4-2=OFF Heat + AUX, AUX SW4-3=OFF SW4-1=OFF SW4-2=OFF Heat + AUX, AUX SW4-3=ON SW4-1=OFF SW4-2=ON Heat + AUX, AUX SW4-3=OFF SW4-1=OFF SW4-2=ON Heat + AUX, AUX SW4-3=ON Airflow volume (CFM) 618 576 529 488 565 541 435 400 653 624 594 565 824 759 694 629 788 753 641 524 871 841 818 788 988 894 806 712 918 876 665 453 1088 1029 976 918 50 Air volume table Capacity External Static Pressure Range Fan Speed 36K c3 Ton 0 - 0.80 in.wc. Cooling Turbo Cooling High Cooling Medium Cooling Low Heat Pump Turbo Heat Pump High Heat Pump Medium Heat Pump Low Electric auxiliary heat module 0(Default) Electric auxiliary heat module 1 42K (3.5 ton) & 48K (4 ton) 0 - 0.80 in.wc. Electric auxiliary heat module 2 Electric auxiliary heat module 3 Cooling Turbo Cooling High Cooling Medium Cooling Low Heat Pump Turbo Heat Pump High Heat Pump Medium Heat Pump Low Electric auxiliary heat module 0(Default) Electric auxiliary heat module 1 Electric auxiliary heat module 2 60K c5 Ton 0 - 0.80 in.wc. Electric auxiliary heat module 3 Cooling Turbo Cooling High Cooling Medium Cooling Low Heat Pump Turbo Heat Pump High Heat Pump Medium Heat Pump Low Electric auxiliary heat module 0(Default) Electric auxiliary heat module 1 Electric auxiliary heat module 2 Electric auxiliary heat module 3 24V thermostat Electric auxiliary heat module DIP Switch 24V terminal engaged -- -- -- -- -- -- -- -- 20kW 15kW 10kW, 8kW 5kW, 8kW -- -- -- -- -- -- -- -- 20kW 15kW 10kW, 8kW 8kW -- -- -- -- -- -- -- -- 25kW 15kW, 20kW 10kW, 15kW 10kW SW3-4=ON SW3-4=OFF -- -- -- -- -- -- SW4-1=OFF SW4-2=OFF SW4-3=OFF SW4-1=OFF SW4-2=OFF SW4-3=ON SW4-1=OFF SW4-2=ON SW4-3=OFF SW4-1=OFF SW4-2=ON SW4-3=ON SW3-4=ON SW3-4=OFF -- -- -- -- -- -- SW4-1=OFF SW4-2=OFF SW4-3=OFF SW4-1=OFF SW4-2=OFF SW4-3=ON SW4-1=OFF SW4-2=ON SW4-3=OFF SW4-1=OFF SW4-2=ON SW4-3=ON SW3-4=ON SW3-4=OFF -- -- -- -- -- -- SW4-1=OFF SW4-2=OFF SW4-3=OFF SW4-1=OFF SW4-2=OFF SW4-3=ON SW4-1=OFF SW4-2=ON SW4-3=OFF SW4-1=OFF SW4-2=ON SW4-3=ON Y2/Y Y2/Y Y1 -- -- B+Y2/Y, W Y1 -- W1, W2, AUX W1, W2, AUX W1, W2, AUX W1, W2, AUX Y2/Y Y2/Y Y1 -- -- B+Y2/Y, W Y1 -- W1, W2, AUX W1, W2, AUX W1, W2, AUX W1, W2, AUX Y2/Y Y2/Y Y1 -- -- B+Y2/Y, W Y1 -- W1, W2, AUX W1, W2, AUX W1, W2, AUX W1, W2, AUX Wired controller DIP Switch Mode Airflow volume (CFM) -- Cool -- Cool -- Cool -- Cool -- Heat -- Heat -- Heat -- Heat SW4-1=OFF SW4-2=OFF Heat + AUX, AUX SW4-3=OFF SW4-1=OFF SW4-2=OFF Heat + AUX, AUX SW4-3=ON SW4-1=OFF SW4-2=ON Heat + AUX, AUX SW4-3=OFF SW4-1=OFF SW4-2=ON Heat + AUX, AUX SW4-3=ON -- Cool -- Cool -- Cool -- Cool -- Heat -- Heat -- Heat -- Heat SW4-1=OFF SW4-2=OFF Heat + AUX, AUX SW4-3=OFF SW4-1=OFF SW4-2=OFF Heat + AUX, AUX SW4-3=ON SW4-1=OFF SW4-2=ON Heat + AUX, AUX SW4-3=OFF SW4-1=OFF SW4-2=ON Heat + AUX, AUX SW4-3=ON -- Cool -- Cool -- Cool -- Cool -- Heat -- Heat -- Heat -- Heat SW4-1=OFF SW4-2=OFF Heat + AUX, AUX SW4-3=OFF SW4-1=OFF SW4-2=OFF Heat + AUX, AUX SW4-3=ON SW4-1=OFF SW4-2=ON Heat + AUX, AUX SW4-3=OFF SW4-1=OFF SW4-2=ON Heat + AUX, AUX SW4-3=ON 1188 1082 971 865 1112 1059 794 582 1306 1241 1176 1112 1600 1471 1282 1094 1471 1324 1141 976 1741 1653 1559 1471 1806 1582 1359 1135 1659 1582 1247 976 2171 2029 1894 1753 NOTICE The constant airflow volume motor is applied. So the airflow volume is constant at all ESP within stated range. 51 SPECIFICATIONS Cooling and Heating power specifications(Regular Heat Series) POWER (outdoor) OUTDOOR UNIT OUTDOOR UNIT POWER LINE OUTDOOR-INDOOR SIGNAL LINE THERMOSTAT SIGNAL LINE PHASE FREQUENCY AND VOLT MCA MOP LINE QUANTITY LINE DIAMETER(AWG) LINE QUANTITY LINE DIAMETER(AWG) LINE QUANTITY LINE DIAMETER(AWG) 12K/18K 16A 20A 14 24K 19A 20A 2+Ground 12 POWER (outdoor) OUTDOOR UNIT OUTDOOR UNIT POWER LINE OUTDOOR-INDOOR SIGNAL LINE THERMOSTAT SIGNAL LINE PHASE FREQUENCY AND VOLT MCA MOP LINE QUANTITY LINE DIAMETER(AWG) LINE QUANTITY LINE DIAMETER(AWG) LINE QUANTITY LINE DIAMETER(AWG) 36K 27A 30A 10 48K 36A 40A 2+Ground 8 30K 23A 25A 12 60K 39A 40A 8 NOTICE Line Diameter Sizing per NFPA 70 (2020), Table 310.15 (B) (16) Based on type NM-B Romex wire. Other sizing options are possible. Consult NFPA 70 or Licensed Electrician for alternate sizing. 52 Cooling and Heating power specifications(Hyper Heat Series) POWER (outdoor) OUTDOOR UNIT OUTDOOR UNIT POWER LINE OUTDOOR-INDOOR SIGNAL LINE THERMOSTAT SIGNAL LINE PHASE FREQUENCY AND VOLT MCA MOP LINE QUANTITY LINE DIAMETER(AWG) LINE QUANTITY LINE DIAMETER(AWG) LINE QUANTITY LINE DIAMETER(AWG) 18K 17A 20A 12 24K 19A 20A 2+Ground 12 POWER (outdoor) OUTDOOR UNIT OUTDOOR UNIT POWER LINE OUTDOOR-INDOOR SIGNAL LINE THERMOSTAT SIGNAL LINE PHASE FREQUENCY AND VOLT MCA MOP LINE QUANTITY LINE DIAMETER(AWG) LINE QUANTITY LINE DIAMETER(AWG) LINE QUANTITY LINE DIAMETER(AWG) 36K 32A 35A 10 42K/48K 38A 40A 2+Ground 8 30K 29.5A 30A 10 60K 40A 40A 8 NOTICE Line Diameter Sizing per NFPA 70 (2020), Table 310.15 (B) (16) Based on type NM-B Romex wire. Other sizing options are possible. Consult NFPA 70 or Licensed Electrician for alternate sizing. 53 AIR EVACUATION NOTICE When opening valve stems, turn the hexagonal wrench until it hits against the stopper. Do not try to force the valve to open further. Preparations and precautions Air and foreign matter in the refrigerant circuit can cause abnormal rises in pressure, which can damage the air conditioner, reduce its e ciency, and cause injury. Use a vacuum pump and manifold gauge to evacuate the refrigerant circuit, removing any non-condensable gas and moisture from the system. Evacuation should be performed upon initial installation and when unit is relocated. 6. Close the Low Pressure side of the manifold gauge, and turn o the vacuum pump. 7. Wait for 5 minutes, then check that there has been no change in system pressure. 8. If there is a change in system pressure, refer to Gas Leak Check section for information on how to check for leaks. If there is no change in system pressure, unscrew the cap from the packed valve (high pressure valve). 9. Insert hexagonal wrench into the packed valve (high pressure valve) and open the valve by turning the wrench in a 1/4 counterclockwise turn. Listen for gas to exit the system, then close the valve after 5 seconds. 10.Watch the Pressure Gauge for one minute to make sure that there is no change in pressure. The Pressure Gauge should read slightly higher than atmospheric pressure. 11. Remove the charge hose from the service port. Evacuation Instructions Flare nut 1. Connect the charge hose of the manifold gauge to service port on the outdoor unit's low pressure valve. 2. Connect another charge hose from the manifold gauge to the vacuum pump. 3. Open the Low Pressure side of the manifold gauge. Keep the High Pressure side closed. Cap 4. Turn on the vacuum pump to evacuate the system. 5. Run the vacuum for at least 15 minutes, or until the Compound Meter reads -750 Microns(-105Pa). valve body valve stem Outdoor unit Manifold Gauge -76cmHg 12. Using hexagonal wrench, fully open both the high pressure and low pressure valves. 13. Tighten valve caps on all three valves (service port, high pressure, low pressure) by hand. You may tighten it further using a torque wrench if needed. Compound gauge Pressure gauge Low pressure valve Pressure hose or Charge hose Low pressure valve High pressure valve Charge hose Vacuum pump 54 NOTE ON ADDING REFRIGERANT CAUTION DO NOT mix refrigerant types. Some systems require additional charging depending on pipe lengths. In North America, the standard pipe length is 25ft (7.5m). The refrigerant should be charged from the service port on the outdoor unit's low pressure valve. The additional refrigerant to be charged can becalculated using the following formula: Refrigerant 1/4in(6.35mm) 3/8in(9.52mm) R454B: (orifice tube in the indoor unit): (Total pipe length - standara pipe length) (Total pipe length - standara pipe length) ×30g(0.32oz)/m(ft) ×65g(0.7oz)/m(ft) 55 TEST RUN CAUTION Failure to perform the test run may result in unit damage, property damage, or personal injury. Before test run A test run must be performed after the entire system has been completely installed. Confirm the following points before performing the test: a) Indoor and outdoor units are properly installed. b) Piping and wiring are properly connected. c) No obstacles near the inlet and outlet of the unit that might cause poor performance or product malfunction. d) Refrigeration system does not leak. e) Drainage system is unimpeded and draining to a safe location. f) Insulation of piping and duct is properly installed. g) Grounding wires are properly connected. h) Length of the piping and additional refrigerant capacity have been recorded. i) Power voltage is the correct voltage for the air conditioner Test run instryctions 1. Open both the liquid and gas service valves. 2. Turn on the main power switch and allow the unit to warm up. 3. Set the air conditioner to COOL mode. 4. For the Indoor Unit a.Double check to see if the room temperature is being registered correctly. b.Ensure the manual buttons on the indoor unit works properly. c.Check to see that the drainage system is unimpeded and draining smoothly. d.Ensure there is no vibration or abnormal noise during operation. 5. For the Outdoor Unit a. Check to see if the refrigeration system is leaking. b. Make sure there is no vibration or abnormal noise during operation. c. Ensure the wind, noise, and water generated by the unit do not disturb your neighbors or pose a safety hazard. 6. Drainage Test a. Ensure the drainpipe flows smoothly. New buildings should perform this test before finishing the ceiling. b. Turn on the main power switch and run the air conditioner in COOL mode. c. Check to see that the water is discharged. It may take up to one minute before the unit begins to drain depending on the drainpipe. d. Make sure that there are no leaks in any of the piping. e. Stop the air conditioner. Turn o the main power switch and reinstall the test cover. NOTICE If the unit malfunctions or does not operate according to your expectations, please refer to the Troubleshooting section of Service Manual before calling customer service. 56 24V SIGNAL CHART Mode Priority G Y1 OFF FAN / 0 0 7 1 0 Cooling stage 1 * 1 Cooling stage 2 * * 6 Dehumidification 1 * 1 Dehumidification 2 * * Heat pump stage 1 * 1 Heat pump stage 2 * * 5 Heat pump stage 2 * * Electric auxiliary heat module 1 * 0 Electric auxiliary heat module 2 3 * 0 Electric auxiliary heat module 1 and 2 * 0 Heat pump stage 1 + Electric auxiliary heat module 1 * 1 Heat pump stage 1 + Electric auxiliary heat module 2 * 1 Heat pump stage 2 + Electric auxiliary heat module 1 * * Heat pump stage 2 + Electric auxiliary heat module 1 * * Heat pump stage 2 + Electric auxiliary heat module 2 * * Heat pump stage 2 + Electric 4 auxiliary heat module 2 * * Heat pump stage 1 + Electric auxiliary heat module 1 and 2 * 1 Heat pump stage 2 + Electric auxiliary heat module 1 and 2 * * Heat pump stage 2 + Electric auxiliary heat module 1 and 2 * * Emergency heat 1 * * Heating zone control * 1 Heating zone control 2 * * Heating zone control * * Note: 1: 24V signal 0: No 24V signal *: 1 or 0. The AHU will turn off if the 24V input cannot meet the table. Y/Y2 0 0 0 1 0 1 0 1 * 0 0 0 0 0 1 * 1 * 0 1 * * 0 1 * 24V input terminal B W W1 0 0 0 * 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 * 1 0 * 0 1 * 0 0 * 0 1 1 0 1 1 0 0 1 0 1 * 1 1 1 0 0 * 1 0 1 0 1 1 0 1 * 1 1 * * * 1 0 * 1 0 * * 1 * W2 E/AUX DH Fan speed Display 0 0 * OFF 00 0 0 * Low 01 0 0 1 Mid 02 0 0 1 High 03 0 0 0 Low 04 0 0 0 Low 05 0 0 1 Mid 06 0 0 1 High 07 0 0 1 High 0 0 * Turbo 08 1 0 * Turbo 1 0 * Turbo 09 0 0 1 Turbo 1 0 1 Turbo 0 0 1 Turbo 10 0 0 1 Turbo 1 0 1 Turbo 1 0 1 Turbo 1 0 1 Turbo 1 0 1 Turbo 11 1 0 1 Turbo * 1 * Turbo 12 * 0 0 Low * 0 0 Low 13 * 0 0 Low 57 The design and specifications are subject to change without prior notice for product improvement. Consult with the sales agency or manufacturer for details. Any updates to the manual will be uploaded to the service website, please check for the latest version. QS002I-AHU(24V)R454B 16122700A24750Pdftools SDK