HITACHI RAS-08HT Split Inverter Type Room Air Conditioner Installation Guide

Installation Instructions

Split Inverter Type
Room Air Conditioner

Before installing the air conditioner, read this instruction manual thoroughly and keep it well for reference in the future.

Cooling Type Series

Indoor Units
RAS-08HT
RAS-10HT
RAS-15HT
RAS-19HT
RAS-24HT
RAS-30HT| Outdoor Units
RAC-08HTP
RAC-10HTP
RAC-15HTP
RAC-19HTP
RAC-24HTP
RAC-30HTP

 Installation Notices

Caution

(Failure to observe the following items may cause serious consequences or damage to the objects)

• Dealers must explain in details the operations to their customers according to this manual.
• Wireless remote controller and parts are packed in the packing box supplied with the indoor unit.
• Before installing, check if the power supply and circuitry are normal and make sure the voltage is within ±10% of the voltage rating.
• The distance of in the installation diagram is to ensure space for the air conditioner’s performance. For convenience of service and maintenance in the future, install the air conditioner in the place with sufficient space in the vicinity.
• Care should be taken in cutting, extension and bending of the refrigerant piping and not to break the pipes. As this air conditioner uses new recyclable refrigerant, “R410A” be sure to follow three principles – keeping the refrigeration system dry, clean, and air tight, when installing the refrigerant piping.

Warning

(Failure to observe the following items may cause injury or death)

• Installation of air conditioner and electrical wiring must be handled by authorized installer only, do not attempt to handle them by yourselves (Handling charges are additional.)
• Before installing, read the installation instructions thoroughly and correctly.
• Use only those specified accessories when installing, otherwise, it may cause the unit body to fall, water leakage, current leakage and fire, etc.
• When discharging, refrigerant is required during installation, be sure to use an air vent and air breather, as refrigerant will produce toxic gas once it mixes with hot air.
• When performing wiring work, be sure to follow the electrical codes and installation instructions, and also be sure to use the power loops exclusively for the air conditioner.
• When installing or moving the units, the refrigeration system (piping) must not mix with refrigerant R22 or air, except refrigerant R410A. If air is mixed in, the system capacity will reduce, causing abnormal high pressure in the refrigeration system that may lead to copper tube breaking and failure to occur.

Earth wire and earth leakage circuit breaker.

To prevent current leakage:

• To avoid carelessness from power companies or other accidents that cause over current to get into the unit via the earth wire resulting in damage to the unit, be sure to install a circuit breaker. Refer to the dealers (the qualified technicians) for details.

• To prevent electric shock in case of current leakage, the outdoor unit must be connected with an earth wire with wire specification of 2.5mm² to 6mm².
  (When hooking up the earth wire, the installer must first handle the end tip of the wire. After crimping the wire with a ring terminal, make sure to screw down the earth wire tightly to complete grounding at the place marked with a grounding sign near the access panel combination or the valve base combination.)

• When installing near places with high humidity such as bathing facilities, damp, humid places, basements, and places with frequent water accumulation, be sure to install a circuit breakers preventing leakage. Refer to the dealers (the qualified technicians) for details.

NOTICE

1. To ensure your safety, this product must not be used in the highly humid areas such as laundry room and bathroom, etc.
2. The earth wire must not be connected to the following positions:
   • Water pipes: If there is a plastic pipe in the pipelines, do not connect the earth wire to the pipeline.
   • Gas pipes: There is risk of explosion after ignited.
   • Ungrounded neutral lines in the electrical circuit panel, earth wires of the telephone line and lightning rods, etc, which may have large amount of current flowing through tending to cause danger when lightning strikes or by other factors.

Selection of installation locations (Confirm the location before

installation)

Indoor

• The units must be installed at the places where sufficient supports are available, vibration-free, firm and stable places. 
• There are no heat sources, fumes in the vicinity and no barriers around the air outlet. 
• There should have some clearance in the distance as indicated by in the diagram ( page 4) on the top, left and right sides of the unit. 
• Places where it is convenient for the unit to drain water and to connect piping of the outdoor units 
• To avoid noise effect, keep the unit and the remote controller 1m or above away from TV and radio, etc. 
• To avoid errors in the remote controller; keep the controller away from high frequency machines and wireless machines with high power output. 
• Make sure the pullout direction of the pipes:
  There are four pullout directions for the pipes – straight backward, downward, leftward and rightward.

1. Pulling rightward
2. Pulling straight
3. Pulling downward
4. Pulling leftward

Outdoor

• Do not install the unit at the places easy to expose rain or direct sunlight, but at the places where there are frequent airflows. 
• The airflow must not face directly to animals and plants. 
• On the top, left, right, front and rear sides of the unit, there must leave clearance in the distance as indicated in the diagram ( page 4). At least two sides should be open, where one side is for the outflow. 
• The outflow air and noises must not annoy neighbors. 
• The units must not be installed at the places where flammable gas, vapor, dust and fumes are available. 
• The drain hose must be kept unclogged. 
• The outdoor units must be installed at the places capable of sustaining heavy weight, otherwise, the noise and vibration will be amplified, tending to cause the unit to fall or personal injury.

Installation dimensions of outdoor units(mm)

Models

| A| B| C| D|

E

---|---|---|---|---|---
RAC-08HTP|

554

| 335| 148| 45|

279

RAC-10HTP
RAC-15HTP
RAC-19HTP|

509

| 335| 214| 100|

237

RAC-24HTP|

530

| 335| 287| 175|

245

RAC-30HTP

1. drain hose

Wiring Diagram

The color of connection wires between the indoor and outdoor units must match and must not be mixed during installation

1. Indoor Unit

2. Power supply
   Single Phase
   230V

3. Earth Wire

4. Outdoor Unit

5. Connection Wire

6. Be sure to use 1.25mm² stranded wire + flat insulation terminal

NOTICE

• Do not use the connection wires together with the same cable for the power supply wire to prevent signal interference that may cause errors.

Required Tools for Installation

• Screw driver
• Tape measure
• Knife
• aw
• Ø65, Ø5mm Drill bit
• Allen wrench (diameter, 5mm)
• Adjustable wrench and torque wrench
• R134a (R410A) Gas leakage tester or soapsuds
• Tubing cutter
• Flaring tools (for R410A only)
• Adhesive-free tape
• Pliers
• Vacuum pump (for R410A only)
• Electronic scale

SCAN ME

Scan this QR code with your mobile device to see further instructions on how to maximize the functions of your air conditioner and for other related information.

Models

| Gas pipe| Liquid pipe| Connection Wires Specification| Power Supply Wire Specification| Fuse Capacity
---|---|---|---|---|---
RAS-08HT / RAC-08HTP| Ø 9.53| Ø 6.35| 1.25mm² Stranded Wire + Blade terminal| Ø 2.0mm Single-core Hard Wire or 3.5mm² Stranded Wire|

10A

RAS-10HT / RAC-10HTP

RAS-15HT / RAC-15HTP| Ø 12.7|

15A

RAS-19HT / RAC-19HTP

RAS-24HT / RAC-24HTP| Ø 15.88|

20A

RAS-30HT / RAC-30HTP

NOTICE

• Be sure to use new refrigerant pipe for piping (replace the R22 used pipe with new pipe, recycling the old R22 pipe after cleaning is prohibited).
• Pipe size to be adopted for installation shall be as per specified specification, pipes with different size with the indoor unit is prohibited for piping.
• It is required for unit installation that two open installation faces are reserved with one of them for unit air outlet.
• Installation distance between the indoor unit and other appliances, such as the fluorescent lamp, television, radio and so on, shall be above 1 meter to prevent the signal interference.

Handling condensate from the outdoor unit

1. Above 70mm

2. Hanging first

3. Press in

• The outdoor unit base is provided with a drain hole for condensed water.

• To drain condensed water by using the drain hole, lift the unit about 70mm or more above the ground, and then fit the drain elbow as shown in the above diagram. Screw it tight in clockwise direction
  at an angle about 40°.

• Install the outdoor unit on Series. Check that the condensed water can drain normally.

• The drainpipe (VP16) should be supplied locally.

Maximum allowable height of tilt for the indoor and outdoor unit

Models|

a (mm)

---|---
RAS-08HT
RAS-10HT
RAS-15HT|

7

RAS-19HT
RAS-24HT
RAS-30HT|

10

1. Not higher than a

NOTICE

The condensed water drain tray for the indoor unit can be fitted from the left or right side. Hence, the installation plate must be kept in a Series when fixing it, or the side fitted with the drain line must be slightly tilted downward. Otherwise, the condensed water may spill out.

1. Not higher than 10 mm

Indoor Units Installation Instructions

Removal of access panel of the indoor unit

1. Fixing screw

2. Screw cover dig here slightly to remove

3. Access panel

Step 1:
Remove the fixing screws of the screw cover beneath the unit and the access panel.

Step 2:
Support the access panel under the base with two hands and apply pressure inward on the “ ” of two sides, until the hook inside the access panel is released from the base.
(A clear sound of “da” can be heard when the hook is released.)

Step 3:
After the hooks on both sides are released, the access panel beneath the unit can be removed downward with both hands. After the access panel is removed, there has more space for wiring and piping work.

Assembly of access panel of the indoor unit

1. Access panel

2. Screw cover

Additional fixing to the installation plate and the base

Note: To let the indoor unit attach closely to the wall, the base and the installation plate can be tightened and secured by using the item (2) screw after piping work is completed, and then assembly the access panel.

Step 1:
Align the round fixing axis with the rectangular hole below the base and insert it all the way upward.

Step 2:
Align the hooks on both sides with the guiding slots on the base and push slightly upward from the bottom of the access panel until the base engages in the access panel and the surfaces are flush. (A clear “da” sound can be heard when the hook is engaged.)

Step 3:
Tighten the fixing screw that fixes the access panel to the bottom of the unit.

Step 4:
Press the screw cover into the access panel.

(a) Base
(1) Installation plate
(2) Screw

1 Fitting the installation plate

• Secure the installation plate by using the intermediate post between walls.

Secure it with 4 or more special screws

1. Special screw
2. Level
3. Installation plate
4. Piping hole
5. Plummet
6. Thread
7. Inscription

• When fitting the installation plate, the figures printed on the bottom of the packaging carton of the unit can be used to position.

1. Contour of the shape of the indoor unit

2. Series
   08~15

3. Series
   19~24

unit : mm

Models

| a|

b

---|---|---
RAS-08HT
RAS-10HT|

82

|

88

RAS-15HT|

93

|

88

RAS-19HT
RAS-24HT
RAS-30HT|

88

|

88

• Installation procedure for fitting the installation plate on the wall.

1. Drilling on the wall.

2. Aligning with the hole on the installation plate.

1. Wall
2. Knock in or screw in
3. Special screw
4. Installation plate

3. Secure the installation plate on the wall by using Item (2) special screws.

1. Ceiling
2. Above 70mm
3. Special screw
   (The diagram is an instance of RAS-08HT)

2 Drilling the wall and fitting the tube guard

• When drilling a hole of Ø65mm in diameter, keep the outdoor side slightly downward and drill it with a small slope.
• Cut the tube guard based on the thickness of the wall to be installed.
• The clearance of pipe plugs must be sealed completely to prevent rain from penetrating indoor.

1. Indoor side
2. Outdoor side
3. Putty
4. Pipe plug
5. Wall
6. Tube guard

NOTICE

When connecting the wires, do not let the wires come in touch with the metal grids inside the wall; In addition, if the wires run through a hollow wall, there is risk of being bitten by rats and causes danger. Be sure to use the tube guard.

3 Preparation for installing the indoor unit

• To pull down the pipes directly:
  1. Remove the access panel, then pull out the connection wires and joint them.
  2. Pull out the pipes, connection wires and the drain hose.

• To pull the pipes horizontally, replace and fit the drain hose and drain cap as shown below. In addition, the drain hose must be inserted all the way in.

• Turn and remove the drain cap by using a plier (this method is easier to remove the cap) as shown in the right diagram.

• To pull the pipes leftward or rightward and downward, use tools such as a saw to cut and remove the plugs or access panel as shown below and then trim the burr.

1. Plug

2. Access panel

3. Connection wire, pipes and drain hose must be secured using a tape.

4. Drain cap

5. Pull it out from access panel

6. Drain hose

NOTICE

• The drain cap and drain hose must be inserted completely, or the condensed water may spill over.

1. Insert it to here
2. Drain cap
3. Drain hose

4 Installation of the indoor unit

A. To install the indoor unit after jointing the refrigerant lines:

• The junction of pipes must be wrapped with insulation materials for fittings.
• Connect the power lines.
• After arranging the connection wires and pipes, place them in the space at the bottom of indoor unit and secure them with tie wraps.
• The insulation pipes must be wound by tape at every 120mm.

1. Insulation material for fittings

B. To install the indoor unit before jointing the refrigerant pipes:

• Refrigerant lines and connection wires must be tied together.
• For the length of the refrigerant lines to be reserved, refer to the right diagram.
• For the length of connection wires to be reserved, refer to the table below.

Models

|

L

---|---
RAS-08HT
RAS-10HT|

70

RAS-15HT|

95

RAS-19HT
RAS-24HT
RAS-30HT|

110

C. Installation

• Hang the indoor unit onto the installation plate.
• Keep the bottom of the inside unit moving forward about 15 cm by using the tie wrap on the back of indoor unit to support against the wall.
• Remove the access panel at the bottom of the indoor unit.
• Insert the drain hose in the hole on the wall.
• After pipes are jointed, the junctions should be wrapped with insulation materials for fittings.
• Jointing connection wires.
• After arranging the connection wires and pipes, place them in the space at the bottom of indoor unit and secure them with tie wraps.
• The pawl at the bottom of indoor unit must securely engage the hook of the installation plate.
• Finally replace the access panel on the unit.

NOTICE

When wrapping too forcibly the insulation material for fitting by a tape, the insulation effect will reduce and causes condensation.

1. Pipe

2. Wrapping too forcibly with a tape

3. Insulation pipe

4. Tie wrap

The front end of the refrigerant pipe must be positioned at the location inscribed with marks.

1. Installation plate

2. Tie wrap

3. Access panel

4. About 15cm

5. Pawl

6. Hook

7. Insulation material for fittings

8. Pipe

9. Connection wire

10. When jointing a pipe, it must be pulled forward to make piping easier.

11. Drain hose

12. Tube guard

13. Tie wrap

14. Junction

D. Draining precautions

• The drain hose must not point up.

Water sump

• The drain hose must not be bent in waves.

Water sump

• The front end of the drain hose must not be dipped in water.

1. Ditch

• The front end of the drain hose must not point up.

1. Water sump

• When pulling horizontally, the front end of drain hose must not be higher.

Front end

5 Jointing pipes

(1) Remove the cap nut.
(Helium in the indoor unit will be discharged)

(2) When jointing pipes, align the pipes with hands and screw them to the end.
(Before jointing, apply some refrigerating oil at the flare opening.)

[Tighten to the end with hands]

(3) After tightening with wrench, slightly rotating backward and tighten with torque wrench. For small diameter pipes, to avoid screwing too tightly, use a torque wrench.

1. Don’t screw all the way in a sudden, but screw slowly until they are tight.
2. Flare nut
3. Piping of indoor unit

[Tightening torque]

|

Outer diameter(Φ)

|

Torque (kgf-cm)

---|---|---
Liquid diameter pipes|

6.35(1/4″)

|

140~190

Gas diameter pipes|

9.53(3/8″)

|

350~450

Gas diameter pipes|

12.7(1/2″)

|

450~550

Gas diameter pipes|

15.88(5/8″)

|

500~600

NOTICE

• Care should be taken when bending the pipes.

6 Jointing of connection wires and securing method

(1) Run the connection wire from the back of unit to the front.
(2) Lift up the panel. (See page 4 in the user manual for instructions)
(3) After removing the screws fixing the electric access panel, lift up the electric access panel and joint the connection wires.
(4) Use Φ1.25mm stranded wire + flat insulation terminal to connect the connection wires.
(5) The flat insulation terminal after inserted in the terminal board, it must be secured by tightening the screw. Make sure that each wire is secured and will not be pulled out; otherwise, the terminal board may be burned out resulting in the unit incapable of working, as shown in the right diagram.

1. (10) Flat insulation terminal

2. 6mm (stripped length)

3. Stranded wire

4. Secure with crimping tools

5. To remove the connection wires, unscrew the screws.

6. Flat insulation terminal

7. Covering

Stripped length of the connection wire.

1. stranded wire

2. Inner covering

3. Outer covering

4. The screw must be tightened to secure fixed the flat insulation terminal

5. Connection wire

6. CD terminal board

NOTICE

• Be sure to use the power loop exclusively for the air conditioner only.
• For installation method of the connection wires, refer to technical reference related to electric facilities.
• Before energizing the connection wires between the indoor and outdoor units, the earth wire of the outdoor unit must first be earthed. Conversely, the connection wire between the indoor and outdoor units should first be removed before the outdoor earth wire is removed.
• Do not use the same cable for the connection wires and the power supply wire to prevent signal interference that can cause errors.

 Outdoor unit installation instructions

1 Jointing the connection wires and the power supply wires

[For the fitting method of the connection wires, refer to the technical reference related to the electric facilities,]

• For handling of the junction of the connection wires, refer to the instructions of indoor units. (Refer to the diagrams below for the scheme after jointed)
• For specifications of the power supply wire and the connection wires, refer to the specification specified in the table of “Electric specification” on Page 3.
• Description of the jointing method:
  (1) Remove the upper cover (for RAC-08HTP~10HTP) or electric access panel (for RAC-15~30HTP) or service cap.
  (2) Joint each wire as specified in the diagram.
  (3) Replace the upper cover or the electric access panel or service cap and valve cap.

RAC-08~10HTP

1. The screws must be tightened securely
2. Power supply wire
3. Connection wire
4. Earth wire

RAC-15~19HTP

1. The screws must be tightened securely
2. Connection wire
3. Power supply wire
4. Earth wire

RAC-24~30HTP

1. The screws must be tightened securely
2. Earth wire
3. Power supply wire
4. Connection wire

• Instructions of power line (LN terminal board) tip handling and slicing

1. When using single-core wires

1. Covering
2. Core

2. When using Stranded wires

1. Stranded wires

2. Ring terminal

3. Secure with crimping tools

4. The screw must be tightened securely

5. Power supply wire

6. LN terminal board

7. When using single-core hard wires.
   no ring terminals are required.

• Instructions of splicing the connection wires (CD terminal board)

1. The screw must be tightened to secure fixed the flat insulation terminal

2. Connection wire

3. CD terminal board

4. (10) Flat insulation terminal

5. 6mm (stripped length)

6. Stranded wire

7. Secure with crimping tools

NOTICE

• Wire attachment must be firmly secure, poor tightening or misconnection is contributable to burn-down of the circuit board.
• Use stranded wire of 2.5~6.0mm² as the earth wire and the wire must be crimped with a ring terminal before attached to the earth wire screw. The screw must be tightened securely without loosening.

2 Preparing the pipes

• The pressure of refrigerant R410A is higher than that of R22, and thus the thickness of copper pipes must comply with that shown in the right table. The copper pipe of 0.7 mm thickness available on the market must not be used.
• Cutting and flaring operation of copper tubes.
  • Use pipe cutter to cut the copper pipe perpendicularly.

1. Tighten the pipe cutter to cut the copper pipe
2. Copper pipe
3. Pipe cutter
4. Rotate to right to feed the knife.
5. Handle

• * When deburring the copper pipe, point down to the pipe to avoid copper chips coming in the pipe.

1. Deburring tool
2. Ensure that the inside of copper tube has no scratches.

• * Perform the pipe flaring.

  • Check the pipe flares. Poor flaring will cause leakage when they are jointed.

1. Press die
2. Copper pipe

Thickness of copper pipes for general refrigerant pipes.

Nominal outer diameter (inch)

| Standard outer diameter (mm)| Thickness of copper tube (mm)
---|---|---
Ø1/4| Ø6.35|

0.8

Ø3/8

| Ø9.52| 0.8
Ø1/2| Ø12.7|

0.8

Ø5/8

| Ø15.88|

1.0

• * Before flaming the pipe with a flaming tool, do not forget to fit a flare nut.

1. Tighten the pipe cutter to cut the copper pipe
2. Flaring tool
3. Screw gripper
4. Copper pipe
5. Flare nut

[Size of overhang of copper pipe] (Strictly observe the size of overhang to  avoid leakage.)

|

A (mm)

---|---
Outer diameter(Ø)| Tool for R410A|

Tool for R22

6.35(1/4″)

| 0~0.5| 1.0
9.53(3/8″)| 0~0.5|

1.0

12.7(1/2″)

| 0~0.5| 1.0
15.88(5/8″)| 0~0.5|

1.0

• Example of poor flaring:

Incomplete deburring

1. Scratches

Copper chips scratch the inside

Under flaring

Over flaring

Cracking

3 Precautions for refrigerant piping

1. Pipe

2. Burr

3. Deburring tool

4. Copper chips and copper powder come in the pipe

|

1. Cap and plastic bag

2. Tying with a rubber band

3. Rain enters the pipe

---|---

1. Indoor

2. Outdoor

3. Sealed

4. Foreign matters and water enters

5. Outdoor

6. Indoor

7. Rubber band

8. Cap and plastic

9. Without touching the ground

10. Ground

11. Ground

12. Foreign matters and water enters

|

1. Wall

2. Cap and plastic

3. Tying with a rubber band

4. Sand enters the pipe

4 Jointing the pipes

Notice: Before joining the pipes, apply some refrigerating oil at the flare opening to ensure no leakage from the joint.

• Remove the flare nut.
• Align and tighten the pipe end with hand.

[ Screw all the way down with hand]

• After tightening with a wrench, slightly screw backward and then tighten it using the torque wrench.

Do not tighten all the way in a sudden, but screw slowly and tight it

[Tightening torque]|

Outer diameter (Ø)

| Torque (kgf-cm)
---|---|---
Liquid diameter| 6.35(1/4″)|

140~190

Gas diameter

| 9.53(3/8″)| 350~450
Gas diameter| 12.7(1/2″)|

450~550

Gas diameter

| 15.88(5/8″)|

500~600

5 Vacuum Operation

• As the outdoor unit contains refrigerant without leakage , to maximize the unit’s performance, be sure to use the following vacuum pump method to vacuum the system after piping work of the indoor and outdoor units is finished.
• When vacuuming, it is not necessary to run the units.
• Before trial run, do not turn on the power to the air conditioner.

• Using the vacuum pump method

(1) Connect the vacuum pump with a composite pressure gauge as shown in the right diagram.
(2) It closes when the knob at Hi position, it fully opens when the knob at Lo position.
(3) Startup the vacuum pump.
(4) Now loosen the flare nut of the service valve on the small tube side and make sure air is sucked in, if yes, tighten the flare nut immediately.
(5) Keep the pump working for 10 to 15 minutes. When the composite pressure gauge indicates -0.1MPa (-76cmHg), fully close the knob Lo.
(6) Stop the vacuum pump.
(7) Remove the valve cap and fully open the spindles of the service valves of the small and large tube sides by turning the Allen wrench in the counterclockwise direction.
(8) Then, remove the charging tube and tighten the valve cap and service valve nut by the tool such as a wrench.

NOTICE

• When fitting the check valve, ensure that the arrow on the check valve points to the vacuum pump.
• When power outage happens during vacuuming, open the discharge vent of the composite pressure gauge to let it reach normal pressure. Then, tighten the vent to re-do vacuuming.

•  Service valve operating precautions

(1) Screw the spindle until it clutches, excess force will cause failure.
(2) Tightening torques for the valve head nut and the valve core nut are shown in the right table.

• Check gas leakage

Use soap suds or “gas leakage tester R134A (R410A)” to check if refrigerant leaks from the joint of the flare nut, if yes, tighten the nut to avoid leakage. Wipe off the soap suds after check.

NOTICE

Be sure to use the vacuum pump exclusively for R410A or install an oil check valve (solenoid valve) to prevent unidentified refrigerating oil from entering in the unit, resulting in damage to parts and failure to the unit. Strictly observe this!

• Using the refrigerant left in the unit is prohibited be sure to use the composite pressure gauge and refrigerant charging hose exclusively for R410A.

1. Charging hose

2. Discharge vent

3. Knob Switch Lo

4. -0.1Mpa

5. Composite pressure gauge

6. Knob Switch Hi

7. Charging hose

8. Ball valve switch

9. Pump check valve

10. Vacuum pump

11. Flare nut

12. Service valve (Gas pipe)

13. Ball valve switch

14. Service valve (Liquid pipe)

15. Flare nut

16. Allen wrench

17. Service valve

18. Valve cap

19. Service valve nut

6 Test run and other precautions

1 Test run check

• After installation, check the piping, wiring, length of connection wires and power supply wire inserted in the terminal board and their polarities (or signs) are correct.
• This product will absorb the noises produced by static electric charge, be sure to connect the earth wire.
• To avoid current leakage, be sure to install a “high sensitivity, high speed earth leakage circuit (for inverter).”

2 Test run

• After installation, check the piping, wiring, length of connection wires and power supply wire inserted in the terminal board and their polarities (or signs) are correct.
• This product will absorb the noises produced by static electric charge, be sure to connect the earth wire.
• To avoid current leakage, be sure to install a “high sensitivity, high speed earth leakage circuit (for inverter).”

3 Installation of a remote controller holder

• The remote controller can be attached to the wall, column or table by using the remote controller holder.
• If the remote controller is to be operated on the holder, make sure that the unit can receive the signals sent from the position of remote controller before determining the position to be installed. The unit will react with a “beep” sound when receiving a signal. The signals can be attenuated due to the fluorescent tube, so when determining the position of installation, even if it is daytime, the light must be turned on.
• Attach the remote controller with wood screws at the suitable position. (Do not attach it to the places where it can expose to direct sunlight and places where strong heat can generate)
• Insert the remote controller in its holder. (As indicated by the arrow in the diagram)

1. Remote controller

2. Remove

3. Insert

4. Wood screw

5. Remote controller holder

Drilling on the wall

1. Plug
2. Wall

4 Refrigerant recharging

Types

| Models| Length of pipes without necessity of refilling refrigerant| Recharge refrigerant when the pipeline is extended (g/m)| Maximum piping length (m)
---|---|---|---|---
Single split| RAC-08HTP
RAC-10HTP| No longer than 10m| 10|

20

RAC-15HTP

| 10| 30
RAC-19HTP|

20

RAC-24HTP
RAC-30HTP

|

15

• As R410A is mixed refrigerant, if charged in gas phase the components of refrigerant will alter, which will affect normal working of the system. So, be sure to charge refrigerant in liquid phase.
• Verify indications on the refrigerant cylinder. If the refrigerant cylinder does not contain a siphon, the cylinder must be positioned upside down; if it contains a siphon, the cylinder must be positioned upright.
• To ensure a correct refrigerant recharging quantity, use an electronic scale.

5 Maintenance operation

• When refrigerant recycle or outdoor-unit-only operation is carried out, please turn off the breaker firstly, then open the switch and wait 1 minute at least, and then press the service switch for 1 second at least on the main PCB of the outdoor unit to start the unit operation.
• Press the service switch again for 1 second at least to stop unit operation.
• After unit stoppage, please turn off the breaker, and then turn on it again to return to the normal state mode.
• To protect the compressor, please do not operate the unit for more than 5 minutes when the service valve is closed.

NOTICE

• Maintenance operation is for professional repairmen use only, users are prohibited to operate it.
• Please do not operate the unit with the service valve closed for more than 5 minutes to prevent the unit malfunction.

66MP1385-A1

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