HITACHI

This manual is exclusively prepared for R410A indoor unit. Please read this manual in conjunction with corresponding manual for outdoor unit.

IMPORTANT: READ AND UNDERSTAND THIS MANUAL BEFORE USING THIS HEAT-PUMP AIR CONDITIONER. KEEP THIS MANUAL FOR FUTURE REFERENCE.

P01588Q

ORIGINAL INSTRUCTIONS

Declaration of Conformity (Manufacturer's Declaration)

Qingdao Hisense Hitachi Air-conditioning Systems Co., Ltd.
Add: 218, Qianwangang Road, Economic & Technical Development Zone, Qingdao, P.R. China
declares under its sole responsibility that the air conditioning models to which this declaration relates:

RPIZ-0.8~2.5HNATNQ

are in conformity with the following standard(s) or other normative document(s), provided that these are used in accordance with our instructions:

following the provisions of:

• EN 60335-1
• EN 60335-2-40
• EN 62233
• EN 55014-1
• EN 61000-3-2
• EN 61000-3-3
• EN 55014-2
• 2006/42/EC
• 2014/30/EU
• 2012/19/EU
• 2011/65/EU
• 2014/35/EU
• 2014/517/EU
• 2009/125/EC
• 2006/1907/EC

Directives, as amended.

Manufacturing number and manufacturing year: refer to model Nameplate.

Notes:
This declaration becomes invalid, if technical or operational modifications are introduced without the manufacturers consent.

Johnson Controls Inc. is authorised to Compile the Technical Construction File.
Ad. : Westendhof 3,45143 Essen, Germany .

HITACHI

Name, Surname : Li Hu
Position/ Title : Director
Date : September 09, 2018

IMPORTANT NOTICE

Signal words (DANGER, WARNING and CAUTION) are used to indicate hazard seriousness. Definitions of the hazard levels are provided below with respective signal words.

! DANGER : Immediate hazard that WILL result in severe personal injury or death.

! WARNING : Hazards or unsafe practices that COULD result in severe personal injury or death.

! CAUTION : Hazards or unsafe practices which COULD result in minor personal injury or damage to property damage.

NOTE : Useful information for operation and/or maintenance.

• This manual should be considered as a permanent part of the air conditioning equipment. Please keep it properly.
• This manual describes and introduces this heat pump air conditioner in a unified manner, so it's applicable for your and other air conditioners.
• Hitachi pursues a policy of continuous improvement in design and performance of products. The right is therefore reserved to change specifications without notice.
• Our company shall not be held responsible for any occasional damage to the air conditioner that arises during its operation in specific environment. This air conditioner is designed for standard air conditioning only. Do not use it for other purposes such as drying cloth, refrigerating foods or for any other cooling or heating processes. Please don't install the air conditioner in the following environments. Otherwise, fire, machine deformation or failure may arise.
  • Places with spatter of oil (including machine oil).
  • Places with inflammable gases.
  • Places with sulfurated gases or silicon (e.g. hot spring, etc.).
  • Coastal areas with much salt or places exposed to strong acids or bases that may cause corrosion to machine.
• Do not have the air outlet directly faced towards animals or plants, since this may bring about an adverse effect thereon.
• The installation and service engineering have to comply with local standards, laws and regulations.
• As an "appliance inaccessible to the public", the installation height of indoor unit of the air conditioner shall be at least 2.5m.
• This air conditioner can only be installed by dealers or professionals. The installation by user may lead to water leakage, electric shock or fire.
• In case of any question, please consult the dealer or the service center designated by our company.
• For environmental protection, please don't dispose of the product casually. Our company can provide recycling service based on relevant regulations, and provide replacement parts according to relevant standards.
• This heat pump air conditioner has been designed for the following temperatures. Be sure to operate the heat pump air conditioner within this range.

* This temperature may vary with outdoor unit.
DB: Dry Bulb, WB: Wet Bulb

Refer to the instruction manual for complete machine (outdoor unit) for information about the product standards to which the indoor unit is subject.

CHECKING PRODUCT RECEIVED

• Upon receipt of this product, check it for any shipping damage. Claims for damage, either apparent or concealed, should be filed immediately with the shipping company.
• Check the model number, electrical parameters (power supply, voltage, and frequency) and accessories to determine if they are correct. Please contact your local dealer in case of problem.
• Our company shall not be held responsible for any consequence arising from the modification to equipment without our written consent.

TABLE OF CONTENTS

1. Safety Precautions
2. Tools & Instruments for Installation
3. Transportation & Handling
   • 3.1 Transportation
   • 3.2 Handling of Indoor Unit
4. Installation of Indoor Unit
   • 4.1 Factory-Supplied Accessories
   • 4.2 Initial Check
   • 4.3 Installation
5. Refrigerant Piping Work
   • 5.1 Piping Materials
   • 5.2 Piping Connection
6. Drain Pipe
7. Electrical Wiring
   • 7.1 General Check
   • 7.2 Wiring
   • 7.3 Field Wire Size for Power Source Line
8. Test Run
9. Protection and Control Devices
10. Field Operation
    • 10.1 Setting of DIP Switch
    • 10.2 Setting of Fan Speed

1. Safety Precautions

! DANGER

• Do not perform installation work, refrigerant piping work, drain piping and electrical wiring connection without referring to the installation manual.
• Check that the ground wire is securely connected.
• Connect a fuse of specified capacity.

! CAUTION

• Do not install the indoor unit, outdoor unit, remote control switch and cable within approximately 3 meters from strong electromagnetic wave radiators such as medical equipment.

2. Tools & Instruments for Installation

Note: When in immediate contact with refrigerant, please use the installation tools and instruments dedicated to the new refrigerant.

3. Instructions for Transportation & Handling

! DANGER

Since the pressure of new refrigerant R410A is 1.4 times that of traditional refrigerant, its performance is susceptible to impurities like moisture, scale and grease, etc. It's essential to remove the moisture, dust, other refrigerants or refrigerant oils from the refrigeration system. Hence, the failure to use specified materials and tools may result in explosion, personal injury, refrigerant leakage, electrical failure or fire.

3.1 Transportation

Transport the product as close to the installation location as practical before unpacking.

! CAUTION

Do not put any material on the product.

3.2 Instructions for Handling

! WARNING

Do not put any foreign material into the indoor unit and check to ensure that none exists in the indoor unit before the installation and test run. Otherwise, a fire or failure, etc. may occur.

! CAUTION

Be careful not to cause damage to insulation materials of the unit surface when it's lifted.

4. Installation of Indoor Unit

Install the indoor unit as per national standard.

! DANGER

Do not install the indoor unit in a flammable environment since this may cause fire or an explosion.

! WARNING

Do not install the indoor unit outdoors. If installed outdoors, an electric hazard or electric leakage will occur.

4.1 Factory-Supplied Accessories

Check to ensure that the following accessories are packed with indoor unit.

Please refer to the packing list on the end page of this manual for standard accessories.

If any of these accessories are not packed with the unit, please contact your dealer.

4.2 Initial Check

Install the indoor unit in a space for easy operation and maintenance as shown in Fig. 4.1.

Models 0.8~2.5

Fig. 4.1 Space around Indoor Unit

• The indoor unit must be installed at an appropriate location so that the indoor temperature can be evenly distributed.
• There should be no obstruction of air flow at the vent.
• Do not install the indoor unit in a machinery shop or kitchen where vapor from oil or its mist flows to the indoor unit. Once the oil deposits on the heat exchanger, it may impair the performance of indoor unit and cause damage to plastic parts therein.
• Pay attention to the following points when the indoor unit is installed in a hospital or other facilities where there are electronic waves from medical equipment, etc.
  • (A) Do not install the indoor unit where the electromagnetic wave is directly radiated to the electrical box, remote control cable or remote control.
  • (B) Install the indoor unit and components as far as practical or at least 3 meters from the electromagnetic wave radiator.
  • (C) Install the remote control switch in an iron box. Arrange the remote control cable in an iron tube. Ground the iron box and iron tube.
  • (D) Install a noise filter when the power supply emits harmful noises.
• To avoid any corrosive action to the heat exchangers, do not install the indoor unit in an acid or alkaline environment.

4.3 Installation

4.3.1 Suspension Bolts

1. Select appropriate location and direction for installation, and pay careful attention to the space for the piping, wiring and maintenance.
2. Cut out the area for the indoor unit in the false ceiling and install suspension bolts, as shown in Fig. 4.2.

Fig. 4.2 Mounting the Suspension Bolts

For Concrete Slab

For Steel Beam

For Wooden Beam

4.3.2 Connection Points of Suspension Bolts and Pipes

1. Indicate the location of suspension bolt, and the connection points of refrigerant pipe and drain pipe.
2. Installation dimensions are shown in Fig. 4.3.

Models 0.8~2.5

Fig. 4.3 Suspension Bolt

4.3.3 Mounting the Indoor Unit

1. Mount the indoor unit as shown in Fig. 4.4.

Mount field-supplied parts
Suspension bolt 4-M10 or W3/8
Nut 8-M10 or W3/8
Washer 8-M10 or W3/8

Fig. 4.4 Installation of Indoor Unit

4.3.4 Leveling of Indoor Unit

1. Check to ensure the top surface is level, and measure the max. top surface inclination degree.

Fig. 4.7 Top Surface Inclination Degree

(2) As shown in Fig. 4.7, the rear part of indoor unit is slightly lower than its front part (by 0~5mm) so as to facilitate drainage.

(3) Tighten the suspension nut upon completion of adjustment. It’s essential to apply thread locker to prevent the nut getting loose.

! CAUTION

Please cover the machine with plastic cloth during installation so as to keep it clean.

4.3.5 Air Duct Connection

Air duct is connected to indoor unit via canvas hose to effectively isolate noise and vibration. Indoor unit is designed with flange with hole connectible to air duct.

(Example)

Fig. 4.8 Air Duct Connection

5. Refrigeration Piping

Use refrigerant R410A in the refrigerant cycle. Do not charge oxygen, acetylene or other flammable and poisonous gases into the refrigerant cycle when performing a leakage test or an air-tight test. These gases are extremely dangerous and can cause an explosion. It is recommended nitrogen be used for those tests.

! DANGER

5.1 Piping Materials

1. Prepare locally-supplied copper pipes.
2. Select clean copper pipes. Make sure there is no dust and moisture inside. Blow the inside of the pipes with nitrogen or dry air, to remove any dust or foreign matters before connecting pipes.
3. Select copper pipes based on Fig. 5.2.

Fig. 5.1 Pipe Connection Points

Fig. 5.2 Pipe Diameter

Since the nut cap connected at gas pipe is designed exclusively for R410A, the piping flaring connected for off-factory installation is adjusted as compared with R22 and R407C. Please perform the processing operation based on the dimensions shown below: (See Fig. 5.3)

Fig. 5.3 Flaring

5.2 Piping Connection

(1) The connection point and diameter of piping are shown in Figs. 5.1 and 5.2.

(2) As shown in Fig. 5.4, two spanners shall be used for tightening the nut.

Fig. 5.4 Nut tightening torque

(3) Insulate the refrigeration piping with field-supplied insulating pipe upon completion of refrigerant pipe connection. See Fig. 5.5.

Fig. 5.5 Insulation on Pipes

! CAUTION

• Cap the end of the pipe when the pipe is to penetrate a hole.
• Do not put pipes on the ground directly without a cap or vinyl tape arranged at the end of the pipe.

(4) Discharging and Charging Refrigerant

Follow the Installation & Maintenance Manual for outdoor unit.

Excessive and inadequate refrigerant is a leading cause of system anomaly. Please inject the right amount of refrigerant.

! CAUTION

6. Drain Pipe

(1) The position of the drain pipe connection is shown in Fig. 6.1.

(2) Prepare a polyvinyl chloride pipe with a 32mm outer diameter.

(3) Fasten the tubing to the drain hose with the adhesive agent and the factory-supplied clamp. The drain pipe must be performed with a down-slope pitch of 1/25 to 1/100.

(4) Insulate the drain pipe after connecting the drain hose.

! CAUTION

Where the relative humidity of air inlet or ambient air exceeds 80%, an auxiliary water pan shall be fabricated at installation site and placed under the indoor unit, as shown in Fig. 6.2.

Fig. 6.2 Water Pan

! CAUTION

• The drain pipe installed shall slope down; otherwise, the condensate may flow back and leak into the room when the indoor unit is turned off.
• The drain pipe shall not be connected with sewage pipe or other drain pipes.
• Where the main drain is connected to other indoor units, each indoor unit must be higher than the main. Select drain pipes in ample size depending on the refrigerating capacity and quantity of indoor units.
• Check if water flows without obstruction following the procedure shown below after the proper connection of wires and drain pipes.
  • a. Turn on the power.
  • b. Fill the water pan with 2L or 2.5L of water.
  • c. Check and ensure the water flows without obstruction and no leakage exists. Pour 2L of water if no water flows out of pipe end.

7. Wiring

7.1 General Check

• Make sure that the field-selected electrical components (main power switches, circuit breakers, wires, conduit connectors and wire terminals) comply with the National Electrical Code.
• Check to ensure that the power supply voltage is within ±10% of the rated voltage. The system can’t be started in the case of excessively low supply voltage.
• Check the power capacity.
• Ensure the ground wire is connected.
• Install the main switch with a space of 3.5mm or more between phases.
• The external static pressure of this indoor unit is 10Pa at delivery, and the 10Pa plug (white) of motor is connected to the PCN18 terminal of substrate. To set the external static pressure to 30Pa, please connect the 30Pa plug (red) of motor to the PCN18 terminal of substrate as shown in the figure below.

7.2 Electrical Wiring Connection

(1) Connect the remote control wire to the PCB in electrical box through the connection hole on electrical box.

(2) Connect the power supply and earth wires to the terminals in the electrical box.

(3) Connect the wires between the indoor unit and the outdoor unit to the terminals in electrical box.

(4) Tightly clamp the wires with wire tie in the electrical box.

(5) Upon completion of wiring connection, seal the wire interface with sealing material to keep condensate water and insects off.

! WARNING

• Turn OFF the main power switches to the indoor unit and outdoor unit before electrical wiring or periodical check, and wait for at least three minutes.
• Check to ensure the indoor and outdoor fans have stopped before electrical wiring or periodical check.
• Protect the wires, drain pipes, electrical parts, etc. from rats or other small animals. If not protected, rats may gnaw at unprotected parts, which may lead to a fire.
• Avoid the contact of wires with the refrigerant piping, sheet metal edges and electrical components in unit. Otherwise, the wires may get damaged or even cause a fire.
• Use ELB with medium sensing rate (earth leakage breaker with action time being equal to 0.1 seconds or less). The failure to do so may result in electric shock or fire.
• The wires must be firmly secured. External force applied to terminals may cause a fire.
• Never connect the power terminal block for air conditioner to power cord. At the indoor unit side of air conditioner, power wiring can be extended through a power distribution box. Be sure to calculate the wiring capacity carefully, since excessively low wiring capacity may frequently cause fire.
• Do not start the system before all check points are thoroughly checked.

! CAUTION

• Wrap the wires with adhesive tape or other materials and plug the wiring connection hole with seal material to protect the product from any condensate water or insects.
• The electrical box entrance hole shall be designed with wire clamp that must be tightened to address tension requirements when penetrated by wires.
• Secure the remote controller wire in electrical box with wire tie.
• Tighten screws to the following torques.
  M4: 1.0~1.3 N·m
  M5: 2.0~2.4 N·m
  M6: 4.0~5.0 N·m
  M8: 9.0~11.0 N·m
  M10: 18.0~23.0 N·m

Fig. 7.1 Electrical Wiring Connection for Indoor Unit

7.3 Specifications of Power Cords for Field Connection, Electrical Parameters of Indoor Unit, and Wire Size

Note:

• (1) Field wiring shall be in conformity to local laws and regulations, and all wiring operations must be performed by qualified professionals.
• (2) Refer to relevant standards for above-noted power cord size.
• (3) Where power cord is connected through junction box in series, be sure to determine the total current and choose wires based on the table above.
• (4) As a minimum, the chosen power cord shall be compliant with requirements on neoprene sheathed wire #57 as stated in IEC 60245-1, while the power cord shall be made from copper conductor.
• (5) The wiring specifications for weak-current communication circuit shall not be lower than that for RVV(S)P shielded wires or equivalent, and the shielding layer shall be grounded.
• (6) A switch that can ensure all-pole disconnection shall be installed between power supply and air conditioning unit in such a manner that the contact spacing shall not be less than 3mm.
• (7) Once the power cord is damaged, the dealer or the professionals from designated maintenance department must be contacted in a timely manner for repair and replacement.
• (8) For the installation of power cord, the ground wire must be longer than the current-carrying conductor.

8. Test Run

Test run should be performed according to the Installation & Maintenance Manual.

! WARNING

• Do not operate the system until all the check points are cleared.
• (A) Check to ensure the electrical resistance between terminal and ground is more than 1 MΩ. If this is not the case, do not operate the system until the electrical leakage is found and repaired.
• (B) Check to ensure the stop valves of outdoor unit are fully opened, and then start the system.
• (C) Check to ensure the switch on main power source has been ON for more than 4 hours to warm the compressor by heater.

Pay attention to the following items while the system is running.

• (A) Do not touch any of the parts by hand at the discharge gas side, since the temperatures of compressor chamber and the pipes at the discharge side are higher than 90°C.
• (B) Do not push the button of the AC contactor. It will cause a serious accident.

9. Protection & Control Devices

Indoor Unit

10. Field Operation

10.1 Setting of Dip Switches

(1) DIP switch must be set with power sources of the indoor and outdoor units in OFF state. Otherwise, the settings are invalid.

(2) The DIP switches are located as shown in the figure below.

(3) 2 rotary switches and 5 dip switches are arranged on the PCB of indoor unit, and the dip switches must be set based on the following instructions before test run. The system shall not be started before the completion of dip switch setup.

(a) Numbering of indoor units (RSW1&DSW6): All indoor units must be numbered in sequence based on the diagram below. Outdoor units must be numbered from "0".

Setting of Indoor Unit

(b) Refrigeration system code No. (RSW2 & DSW5) is required to be set. All are set to OFF before delivery.

Setting of Refrigerant System

(c) Setting of capacity code (DSW3)
This switch is used to set indoor unit capacity. The capacity is set before delivery.

(d) Model code setting (DSW4)
The code is set before delivery.

(e) Safety reset (DSW7)
*Factory settings

! CAUTION

The power supply shall be turned off before the setup of DIP switch. Otherwise, the settings will be invalid.