mars VXP-SA Series Multi Position Air Handler Owner's Manual

Before operating or installing the air handler, it is crucial to
read and understand the Safety Precautions outlined in the owner’s
manual. Failure to follow these instructions may result in serious
damage or injury.

Electrical Warnings:

Ensure proper electrical connections are made according to the
specifications provided in the manual to prevent electrical
hazards.

Cleaning and Maintenance:

Use recommended cleaning agents to prevent fire or deformation
of the unit. Regular maintenance is essential for optimal
performance.

Refrigerant Usage:

Refer to the manual for the correct R454B refrigerant charge
amount. Use of flammable refrigerants should be avoided to prevent
safety risks.

Frequently Asked Questions (FAQ):

Q: Can children operate the air handler?

A: This appliance is not intended for use by individuals with
reduced capabilities or lack of experience. Children should be
supervised at all times around the unit.

Q: What should I do if there is a warning symbol
displayed?

A: If a warning symbol appears, refer to the owner’s manual for
guidance on how to proceed. Do not ignore any warning
indicators.

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OWNER MANUAL

VXP-SA Series

Multi-Position Air Handler

B-VXP18SA-1 B-VXP24SA-1 B-VXP30SA-1

B-VXP36SA-1 B-VXP48SA-1 B-VXP60SA-1

w IMPORTANT NOTE,
Read this manual carefully before installing or operating your new air conditioning unit. Make sure to save this manual for future reference.
517.787.2100 · www.marsdelivers.com

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CONTENTS

VXP Series – Owner’s Manual

SAFETY PRECAUTIONS································································································································································ 02 INDOOR UNIT PARTS AND MAJOR FUNCTIONS······························································································ 12 CARE AND MAINTENANCE ····················································································································································· 14 TROUBLESHOOTING ······································································································································································· 16

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.
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VXP Series – Owner’s Manual
Safety Precautions

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It is really important that 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 personnel injury or loss of life.
CAUTION
This symbol indicates the possibility of property damage or serious consequences.

A WARNING
This appliance is not intended for use by persons(including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety. Children should be supervised to ensure that they do not play with the appliance.
A WARNING FOR PRODUCT USE
· Turn off the air condtioner and disconnect the power before performing any cleaning, installation or repairing. Failure to do so can cause electric shock.
· If an abnormal situation arises (like a burning smell), immediately turn off the unit and disconnect the power. Call your dealer for instructions to avoid electric shock, fire or injury.
· Do not insert fingers, rods or other objects into the air inlet or outlet. This may cause injury, since the fan may be rotating at high speeds.
· Do not use flammable sprays such as hair spray, lacquer or paint near the unit. This may cause fire or combustion.
· Do not operate the air conditioner in places near or around combustible gases. Emitted gas may collect around the unit and cause explosion.
· Do not operate your air conditioner in a wet room such as a bathroom or laundry room. Too much exposure to water can cause electrical components to short circuit.
· Do not expose your body directly to cool air for a prolonged period of time. · Do not allow children to play with the air conditioner. Children must be
supervised around the unit at all times. · If the air conditioner is used together with burners or other heating devices,
thoroughly ventilate the room to avoid oxygen deficiency. · In certain functional environments, such as kitchens, server rooms, etc., the use
of specially designed air-conditioning units is highly recommended.
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A ELECTRICAL WARNINGS

VXP Series – Owner’s Manual

· 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 electric shock.
· Disconnection must be incorporated in the fixed wiring in accordance with the wiring rules.
· Do not share the electrical outlet with other appliances. Improper or insufficient power supply can cause fire or electric shock.
· If connecting power to fixed wiring, an all-pole disconnection device which has at least 3mm clearances in all poles, and have a leakage current that may exceed l0mA, the residual current device (RCD) having a rated residual operating current not exceeding 30mA, and disconnection must be incorporated in the fixed wiring in accordance with the wiring rules.
CLEANING AND MAINTENANCE WARNINGS

· Turn off the device and disconnect the power before cleaning. Failure to do so can cause electric 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.
& CAUTION

· Turn off the air conditioner and disconnect the power if you are not going to use it for a long time.
· Turn off and unplug the unit during storms. · Make sure that water condensation can drain unhindered from the unit. · Do not operate the air conditioner with wet hands. This may cause electric shock.
· Do not use device for any other purpose than its intended use.
· Do not climb onto or place objects on top of the outdoor unit.
· Do not allow the air conditioner to operate for long periods of time with doors or windows open, or if the humidity is very high.

A WARNING FOR USING FLAMMABLE REFRIGERANTS

· Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer.
· 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).
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VXP Series – Owner’s Manual

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· Do not pierce or burn. · Be aware that refrigerants may not contain an odor. · 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 manufacture. It shall only be replaced with the sensor specified by the manufacture.

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:

P1its

Model
18K(208/230V)

24K(208/230V)

30K(208/230V) 24V
36K(208/230V)

48K(208/230V) 60K(208/230V)

Indoor unit
B-VXP18SA-1 B-VXP24SA-1 B-VXP30SA-1 B-VXP36SA-1 B-VXP48SA-1 B-VXP60SA-1

Outdoor unit
A-VXP18SA-1
A-VXP24SA-1 A-VXP30SA-1 A-VXP36SA-1 A-VXP48SA-1 A-VXP60SA-1

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VXP Series – Owner’s Manual

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
[ft 2/m 2 ] 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
[ft 2/m 2 ] 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.

VXP Series – Owner’s Manual

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1. lnstallation(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 authorises their competence to handle refrigerants safely in accordance with an industry recognised 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. – Appliance shall be stored in a well ventilated area where the room size corresponds to the room area as specifiec for operation. – Appliance shall be stored in a well ventilated area where the room size corresponds to the room area as specifiec 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.

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 effects, 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:
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.

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VXP Series – Owner’s Manual

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.
— Any servicing shall be performed only as recommended by the manufacturer.

3 . Qualification of workers Any maintenance, service and repair operations must be required qualification of the working personnel. Every working procedure that affects 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.

Information Servicing
1. 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.
2. 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.
3. General work area All maintenance staff and others working in the local area shall be instructed on the nature of work being carried out. work in confined sapces shall be avoided.
4. C hecking 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.
5. 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.
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VXP Series – Owner’s Manual

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6. 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 sufficiently 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.

7. 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.

8. C hecks 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.

9. 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.

10. Sealed electrical components shall be replaced if it’s damage

11. Intrinsically safe components must be replaced if it’s damage

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VXP Series – Owner’s Manual

12. Cabling
Check that cabling will not be subject to wear, corrosion, excessive pressure, vibration, sharp edges or any other adverse environmental effects. The check shall also take into account the effects of aging or continual vibration from sources such as compressors or fans.

13. 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 refrigerant-free 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, – fluorescent method agents. 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 off valves) in a part of the system remote from the leak. See the following instructions of removal of refrigerant.
14. 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.
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VXP Series – Owner’s Manual

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15. 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 different 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.

16. 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 required prior to re-use of recovered refrigerant. It is essential that electrical power is available before the task is commenced. 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 off. k) Recovered refrigerant shall not be charged into another refrigeration system unless it has been cleaned and checked.

17. Labelling 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.

18. 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

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VXP Series – Owner’s Manual

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-off 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.

19. Transportation, marking and storage for units
1. Transport of equipment containing flammable refrigerants Compliance with the transport regulations
2. Marking of equipment using signs Compliance with local regulations
3. Disposal of equipment using flammable refrigerants Compliance with national regulations
4. Storage of equipment/appliances The storage of equipment should be in accordance with the manufacturer’s instructions.
5. Storage of packed (unsold) equipment Storage package protection should be constructed such 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

A2L WARNING

CAUTION

This symbol shows that this appliance used a flammable 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 read carefully.

Ci]

CAUTION CAUTION

This symbol shows that a service personnel should be handling this equipment with reference to the installation manual.

CAUTION

This symbol shows that information is available such as the operating manual or installation manual.

VXP Series – Owner’s Manual

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INDOOR UNIT PARTS AND MAJOR FUNCTIONS

1.1 UNIT PARTS Air outlet
QQQ

FII.Tmt C0YIR
/) Q i Air inlet

1.2 OPERATING CONDITIONS

Use the system under the following temperatures for safe and effective operation. If the air conditioner is used under different conditions, it may malfunction or become less efficient.

INVERTER SPLIT TYPE

Room Temperature

COOL mode
16° C – 32° C (60 °F – 90 °F)

HEAT mode DRY mode

0 ° c – 30 ° c

10 ° c – 32° c

(32°F – 86°F) (50 °F – 90 °F)

Outdoor Temperature

-30 ° C – 50 ° C (-22°F – 122°F) (For Hyper Heat Series)
-25° C – 50 ° C (-13°F – 122°F) (For Regular Heat Series)

-30 ° C – 24 ° C (-22°F – 75°F) (For Hyper Heat Series)
-25° C – 24 ° C (-13°F – 75°F) (For Regular Heat Series)

0 ° c – 50 ° C (32°F – 122°F)

FOR OUTDOOR UNITS WITH AUXILIARY ELECTRIC HEATER
When outside temperature is below 0 ° C(32°F ), we strongly recommend keeping the outdoor unit powered at all times to prevent damage to equipment.

9 NOTICE Room relative humidity less than 80%. If the air conditioner operates in excess of this figure, the surface of the air conditioner may attract condensation.

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VXP Series – Owner’s Manual

TO FU RTH E R O PTI M I Z E T H E PERFORMANCE O F YOU R U N IT, DO T H E FOLLOWING:
· Keep doors and windows closed. · Limit energy usage by using TIM E R O N and TIM E R O F F functions. · Do not block air inlets or outlets. · Regularly inspect and clean air filters.

1.3 FEATURES
Refrigerant Leak Detection System
In the event of a refrigerant leak, the LCD screen will display ” E L0C” or ” E H Cl ” or ” E H C2 ” and the L E D indicator light will flash. The default temperature of the first power-on is set t o 60 ° F for refrigeration and 86 ° F for heating. When the temperature stops, the temperature is set at the room temperature at that time.
· NOTICE
· Under normal working conditions, the switch, wind speed and temperature can not be adjusted by remote control.
· Requirements of wire controller: Control A U X function for live heating.

1 .4 E N E RGY SAV I N G TI PS
· DO N OT set the unit to excessive temperature levels. · While cooling, close the curtains to avoid direct sunlight. · Doors and windows should be kept closed to keep cool or warm air in the room. · DO N OT place objects near the air inlet and outlet of the unit. · Replace the air filter every 30 to 90 days depending on thickness and M E RV.

Closing curtains during heating also helps keep the heat in

Doors and windows should be kept closed

VXP Series – Owner’s Manual
CARE AND MAINTENANCE

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CLEAN ING YOU R I NDOOR UNIT
A BEFORE CLEAN ING OR MAI NTENANCE
Always turn off your air conditioner system and disconnect its power supply before cleaning or maintenance.
· Contact an authorized service technician for repair or maintenance. Improper repair and maintenance may cause water leakage, electrical shock, or fire, and may void your warranty.
· Do not substitute a blown fuse with a higher or lower amperage rating fuse, as this may cause circuit damage or an electrical fire. Replacement Fuse must be identical to one removed.
· Make sure the drain hose is set up according to the instructions. Failure to do so could cause leakage and result in personal property damage, fire and electric shock.
· Make sure that all wires are connected properly. Failure to connect wires according to instructions can result in electrical shock or fire.
& CAUTION FOR ALL PI PES INSTALLATION
Only use a soft, dry cloth to wipe the unit clean. If the unit is especially dirty, you can use a cloth soaked in warm water to wipe it clean.
· Do not use chemicals or chemically treated cloths to clean the unit.
· Do not use benzene, paint thinner, polishing powder or other solvents to clean the unit. They can cause the plastic surface to crack or deform. Use of volatile cleaners may cause fire, resulting in injury or death.
· Do not use water hotter than 40° C (104 ° F ) to clean the front panel. This can cause the panel to deform or become discolored.
· Do not wash the unit under running water. Doing so creates an electrical hazard.
· Clean the unit using a damp, lint-free cloth and neutral detergent. Dry the unit with a dry, lint-free cloth.

9 NOTICE
Inspect and clean or replace air filter each month or as required.

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VXP Series – Owner’s Manual

& CAUTION
· Before changing the filter or cleaning, turn off the unit and disconnect its power supply.
· When removing filter, do not touch metal parts in the unit. The sharp metal edges can cut you.
· Do not use water to clean the inside of the indoor unit. This can destroy insulation and cause electrical shock.
· Do not expose filter to direct sunlight when drying. This can shrink the filter.
· Any maintenance and cleaning of outdoor unit should be performed by an authorized dealer or a licensed service provider.
· Any unit repairs should be performed by an authorized dealer or a licensed service provider.

Maintenance your AC.

Maintenance Long Periods of Non-Use
If you plan not to use your air conditioner for an extended period of time, do the following:

Maintenance Pre-Season Inspection
After long periods of non-use, or before periods of frequent use, do the following:

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Clean a l l filters

Tu rn o n FA N function u n t i l unit d ries out com p l etely

Check for damaged wi res

Check for leaks

M a ke s u re noth i n g is b l o c k i n g all air inlets and outlets
r
Clean a l l filters
15

VXP Series – Owner’s Manual

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TROU BLES H OOTI N G

A SAFETY PRECAUTIONS

If any of the following conditions occurs, turn off your unit immediately! · You smell a burning odor. · The unit emits loud or abnormal sounds. · A power fuse blows or the circuit breaker frequently trips. · Water or other objects fall into or out of the unit.
D O N O T ATT E M PT TO F I X T H ES E YO U RS E L F ! C O N TACT A N A U T H O R I Z E D SERVICE PROVIDER I M M E D IATELY!

Common Issues

The fol l owing problems a re not a malfu nction and i n most situations w i l l not requ i re repa i rs.

Issue

Possible Causes

Unit does not turn on when pressing O N/O F F button

The U n it has a 3-minute protection featu re that prevents the u n it from overloading. The unit cannot be restarted within three minutes of being turned off.
Coo l i ng and H eating Models: I f t h e O peration l i g ht and PRE-DEF (Pre-heati ng/ Defrost) indicators a re lit u p, t h e outdoor tem peratu re i s too cold and t h e u n it’s anti-cold wind is activated in order to defrost the unit. In Cooling-only Models: If the “Fan Only” indicator is l it up, the outdoor tem peratu re is too cold and the u n it’s anti-freeze protection is activated in order to defrost the unit.

The unit changes from CO O L/H EAT m o d e t o FAN mode

The u n it may change its setting to prevent frost from form ing on the u n it. Once the tem peratu re i ncreases, the unit will start operating i n the previously selected mode again.
The set temperatu re has been reached, at which point the unit turns off the compressor. The unit will continue operating when the tem perature fluctuates again.

The indoor unit emits white mist

I n h u m i d reg ions, a large tem peratu re difference between t h e room’s ai r and the conditioned air can cause white mist.

Both the indoor and outdoor units emit white mist

W h e n t h e u n it resta rts i n H EAT mode after defrosti ng, wh ite m ist m a y be emitted due to moisture generated from the defrosting process.

The indoor unit makes noises

A squeaking sound is heard when the system is OFF or in COOL mode. The noise is also heard when the drain pump (optional) is in operation.
A squeaking sound may occur after running the u nit in H EAT mode due to expansion and contraction of the u n it’s plastic parts.

Low hissing sou nd d u ri n g o peration: T h i s is normal a n d is caused by refrigera nt gas flowing through both indoor and outdoor units.

Both the i n d o o r u n it Low hissing sou nd when the system sta rts, has j ust sto p ped ru n n i ng, or is

and outdoor u n it make noises

defrosti n g : T h i s noise is normal a n d is caused by the refrigerant gas sto p p i n g o r changing direction.

Squea king sound: Normal expansion and contraction of plastic and metal parts caused by tem peratu re changes during operation can cause squea king noises.

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VXP Series – Owner’s Manual

Issue
The outdoor unit makes noises
Dust is emitted from either the indoor or outdoor unit

Possible Causes
The unit will make different sounds based on its current operating mode.
The unit may accumulate dust during extended periods of non-use, which will be emitted when the unit is turned on. This can be mitigated by covering the unit during long periods of inactivity.

The unit emits a bad odor

The unit may absorb odors from the environment (such as furniture, cooking, cigarettes, etc.) which will be emitted during operations.
The unit’s filters have become moldy and should be cleaned.

The fan of the outdoor unit does not operate During operation, the fan speed is controlled to optimize product operation.

9 NOTICE
If problem persists, contact a local dealer. Provide them with a detailed description of the unit malfunction as well as your model number.

Troubleshooting

When troubles occur, please check the following points before contacting a repair company.

Problem

Possible Causes
Temperature setting may be higher than ambient room temperature

Solution
Lower the temperature setting

The heat exchanger on the indoor or outdoor unit is dirty

Clean the affected heat exchanger

Poor Cooling Performance

The air filter is dirty
The air inlet or outlet of either unit is blocked Doors and windows are open
Excessive heat is generated by sunlight Too many sources of heat in the room (people, computers, electronics, etc. )

Remove the filter and clean it according to instructions
Turn the unit off, remove the obstruction and turn it back on Make sure that all doors and windows are closed while operating the unit Close windows and curtains during periods of high heat or bright sunshine
Reduce amount of heat sources

Low refrigerant due to leak or long-term use

Check for leaks, re-seal if necessary and top off refrigerant

VXP Series – Owner’s Manual

Problem
The unit is not working

Possible Causes Power failure The power is turned off The fuse is burned out
The Unit’s 3-minute protection has been activated
Timer is activated

Solution Wait for the power to be restored Turn on the power Replace the fuse
Wait three minutes after restarting the unit Turn timer off

There’s too much or too little refrigerant in the system

Check for leaks and recharge the system with refrigerant.

The unit starts and stops frequently

Incompressible gas or moisture has entered the system.
System circuit is blocked

Poor heating performance

The compressor is broken
The voltage is too high or too low
The outdoor temperature is extremely low
Cold air is entering through doors and windows
Low refrigerant due to leak or long-term use

Evacuate and recharge the system with refrigerant
Determine which circuit is blocked and replace the malfunctioning piece of equipment
Replace the compressor
Install a manostat to regulate the voltage
Use auxiliary heating device
Make sure that all doors and windows are closed during use
Check for leaks, re-seal if necessary and top off refrigerant

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entury

L I M ITED EXP RESS WARRANTY

Congratulations on purchasing your new HVAC equi pment. It’s bee n designed for long l ife and re liable service, and is backed by one of the strongest warra nties i n the ind ustry. You r u n it a utomatical ly qual ifies for the warranty coverage l isted below, providing you keep your proof of purchase (recei pt) for the equi pment and meet the warranty conditions.

DURATI ON OF WA RRANTY & REGISTRATI ON
The warranty beg ins on the date of purchase by the original consumer. The consumer m ust retain a recei pted bill of sale as proof of warranty period. Without this proof, the express warranty beg ins on the date of shipment from the factory.

LIMITED TEN ( 1 0) YEAR EXPRESS WARRANTY MARS warrants all parts including the compressor of the VXP-SA Series Air Handler and Side D ischarge Condenser to be free from defects in workmanship and materials for normal use and mai ntenance for ten ( 1 0) years from the date of purchase by the original consumer for the original i n sta l l ati o n .
COMPRESSOR FA ILURE COVERAGE (RESIDENTIAL I NSTA LLATION) With registration with i n 60 days of purchase: If the compressor fails with i n t h e first year after purchase, u n it will be credited a t original purchase cost, including $300 labor allowance.
Without registration with i n the 60-day period: If the compressor fa ils with i n 90 days after purchase, unit will be credited a t original purchase cost, including $300 labor allowance. In both cases, the cred it(s) will be issued to an authorized Comfort-Aire/Century distributor, who has received prior authorization from Comfort-Aire/Century. The owner is responsible for any additional labor, freight or miscel laneous charges.
EXCEPTIONS T h e Lim ited Express Warranty does n o t cover normal mai ntenance-MARS recommends that reg ular i nspection/mai ntenance be performed at least once a season and proof of mai ntenance be kept. Add itional ly, labor charges, transportation charges for replacement parts, replacement of refrigerant or filters, any other service calls/repairs are not covered by this Lim ited Warranty. It also does not cover any portion or com ponent of the system that is not suppl ied by MARS, regardless of the cause of fai l u re of such portion or com ponent.
C O N D I T I O N S FOR WA RRA N TY COVERA G E U n it m ust b e operated accord ing t o MARS operati ng instructions incl uded with the u n it and can not have been subjected to accident, alteration, i m proper repair, neglect or misuse, or an act of God (such as a flood)
I nstallation was done by a trained, licensed or otherwise qual ified HVAC dealer/contractor
Performance can not be i m paired by use of any prod uct not authorized by MARS, or by any adj ustments or adaptations to com ponents
Serial n u m bers and/or rati ng plate have not been altered or removed
Damage has not been a result of i nadeq uate wiring or voltage conditions, use d u ring brown-out conditions, or ci rcu it i nterru ptions
Ai r flow around any section of the u n it has not been restricted
U n it remains in the original installation
U n it was not purchased over the i nternet

REMEDY PROVI DED BY THE LIMITED EXPRESS WARRANTY The sole remedy under the Lim ited Wa rranty is replacement of the defective part. If replacement parts are req u i red with i n the period of this warranty, MARS replacement parts shall be used ; any warranty on the replacement part(s) shall not affect the appl icable original unit warranty. Ready access to the unit for service is the owner’s responsibility. Labor to diagnose and replace the defective part is not covered by this Lim ited Express Warranty. If for any reason the replacement part/product is no longer available d u ring the warranty period, MARS shall have the right to allow a credit i n the amount of the cu rrent suggested retai l price of the part/product instead of providing repair or replacement.
LIMITATION OF LIABI LITY
1 . There are no other express or impl ied warranties. MARS makes no warranty of merchantabil ity. We do not warrant that the unit is su itable for any particu lar pu rpose or can be used in buildings or rooms of any particu lar size or condition except as specifically provided i n this docu ment. There are no other warranties, express or i m plied, which extend beyond the description in this document.
2 . All warranties impl ied by law are l i m ited i n d u ration to the sevenyear term of the parts warranty. You r exclusive remedy is l i m ited to the replacement of defective parts. We wi l l not be liable for any consequential or incidenta l damages caused by any defect i n this u n it.
3 . This warranty gives you specific legal rights and you may also have other rig hts which vary from state to state. Some states do not allow l i m itation on how long an i m plied warranty lasts or do not al low the exclusion or lim itation of i ncidental or consequential damages, so the above lim itations or exclusions may not apply to you.
4 . No warranties are made for u n its sold outside the continental U n ited States and Canada. You r distributor or fi nal seller may provide a warranty on units sold outside these areas.
5 . MARS will not be liable for damages if our performance regarding warranty resol ution is delayed by events beyond our control including accident, alteration, abuse, war, govern ment restrictions, stri kes, fi re, flood , or other acts of God .
HOW TO OBTAIN WARRANTY SERVI CE OR PARTS If you have a warranty clai m , notify your installer prom ptly. If the i nstaller does not remedy your clai m , write to MARS, 1 900 Wellworth Ave. , Jackson Ml 49203. Enclose a report of i nspection by your i nstaller or service person . I nclude model n u m ber, serial n u m ber, a n d date o f purchase.

Owner respons i b i l ities are set forth i n the i nstruction manual-read it careful ly.

Please visit www.marsdelivers.com to register your new product
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– Deliwring Confidence

KEEP THIS I N FORMATION AS A RECORD OF YOU R P U RCHASE

INDOOR UNIT

OUTDOOR UNIT

I N STALLATI O N

Model Number Serial Number

I nstaller Name Phone No./Contact I nfo

Date of Purchase

Date I n stallation Completed

Remember to retai n your bill of sale as proof of warranty period .

VXP-SA_ WARRAN TY_S/2025

4/2025

Due to ongoing product i m provements, specifications and d i mensions are subject to change and correction without notice or incurring obligations. Determ i n i ng the
application and suitabil ity for use of any product is the responsi bil ity of the i nstaller. Additional ly, the installer is responsible for verifying d i mensional data on the actual product
prior to beginning any installation preparations.
In centive and rebate programs have precise requi rements as to prod uct performance and certification. Al l prod ucts meet appl icable regulations i n effect on date of manufacture;
however, certifications are not necessari ly g ranted for the life of a prod uct. Therefore, it is the responsi bil ity of the applicant to determ i ne whether a specific
model qual ifies for these incentive/rebate programs.
enlury
1 900 Wel lworth Ave . , Jackson , M l 49203 · P h . 5 1 7-787-2 1 00 · www. marsdel ivers. com
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Documents / Resources

mars VXP-SA Series Multi Position Air Handler [pdf] Owner's Manual
B-VXP18SA-1, B-VXP24SA-1, B-VXP30SA-1, B-VXP36SA-1, B-VXP48SA-1, B-VXP60SA-1, VXP-SA Series Multi Position Air Handler, VXP-SA Series, Multi Position Air Handler, Position Air Handler, Air Handler, Handler

References

User Manual

mars VXP-SA Series Multi Position Air Handler Owner’s Manual

VXP-SA Series Multi Position Air Handler

Specifications:

Product Usage Instructions:

Safety Precautions:

Electrical Warnings:

Cleaning and Maintenance:

Refrigerant Usage:

Frequently Asked Questions (FAQ):

Q: Can children operate the air handler?

Q: What should I do if there is a warning symbol
displayed?

Documents / Resources

References

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