HITACHI RAC-VJ60WHAE Split Unit Air Conditioner Outdoor Unit Installation Guide

! CAUTION
A circuit breaker or fuse must be installed. Without a circuit breaker or fuse the danger of electric shock exists. The external switch shall be incorporated to completely disconnect from power supply. It should disconnect all poles, and a contact separation of at least 3mm must be present.
Do not install the unit near a location where there is flammable gas. The outdoor unit may catch fire if flammable gas leaks around it.
Do not install the indoor unit in a machine shop or kitchen where vapor from oil or its mist flows to the indoor unit. The oil will deposit on the heat exchanger, thereby reducing the indoor unit performance and may deform and in the worst case, break the plastic parts of the indoor unit.
Please ensure smooth flow of water when installing the drain hose.
Piping shall be suitable supported with a maximum spacing of 1m between the supports.

! WARNING
Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer. Any unfit method or using incompatible material may cause product damage, burst and serious injury.
The appliance/pipe-work shall be stored in a well ventilated room with indoor floor area larger than Amin [refer to Table 1] and without any continuously operating ignition source. Keep away from open flames, any operating gas appliances or any operating electric heater. Else, it may explode and cause injury or death.
The appliance/pipe-work shall be installed, and/or operated in a room with floor area larger than Amin [refer to Table 1] and keep away from ignition sources, such as heat/spark/open flame or hazardous areas such as gas appliances, gas cooking, reticulated gas supply systems or electric cooking appliances, etc.
Do not pierce or burn as the appliance/pipe-work is pressurized. Do not expose the appliance/pipe-work to heat, flame, sparks, or other sources of ignition. Else, it may explode and cause injury or death.

The Choice of Mounting Site (Please note the following matters and obtain permission from customer before installation).

! WARNING

Names of Outdoor Components

The Outdoor unit must be mounted at a location which

No.

Item

Qty

can support heavy weight. Otherwise, noise and vibration

will increase.

1 Bush

3

OUTDOOR UNIT

! CAUTION
Do not expose the unit under direct sunshine or rain. Besides, ventilation must be good and clear of obstruction.
The air blown out of the unit should not point directly to animals or plants.
The clearances of the unit from top, left, right and front are specified in Figure 1. At least 3 of the above sides must be open air.
Be sure that the hot air blown out of the unit and noise do not disturb the neighbourhood.
Do not install at a location where there is flammable gas, steam, oil and smoke.
The location must be convenient for water drainage.
Place the Outdoor unit and its connecting cord at least 1m away from the antenna or signal line of television, radio or telephone. This is to avoid noise interference.
Do not install outdoor unit facing strong wind direction. It may damage the fan motor.
Do not install the outdoor unit in a place where small animals may build their nests. If small animal goes inside the unit and touches the electrical parts, failure of the unit, smoke or fire may be caused. Request your customer to keep the surrounding of the unit is clean.

2 Drain Pipe

1

3 Bush

1

Dimension of Mounting Stand of the Outdoor unit (unit : mm)
mounting stand

Figure showing the Installation of Outdoor Unit.
! CAUTION
This unit is chargeless up 30m pipe length. Installation of pipe length less than minimum
pipe length requirement (3 meters) may generate an abnormal sound.

WARNING
This symbol shows that this equipment uses a flammable refrigerant. If the refrigerant is leaked, together with an external ignition source, there is a possibility of ignition.

Table 1: Minimum Floor area of the room Amin (m2)

Outdoor Model

Max Piping Length (m)

Max refrigerant charge amount
(g)

Minimum Floor area of the room Amin (m2)
RAK-VJ60RHAE

RAC-VJ60WHAE

30

1500

2.13

CAUTION
This symbol shows that the Operation Instructions should be read carefully.
CAUTION
This symbol shows that a service personnel should be handling this equipment with reference to the Installation Manual.
CAUTION
This symbol shows that there is information included in the Operation Manual and/or Installation Manual

Be sure to completely seal any gap with putty.

! WARNING
BURST HAZARD Do not allow air, etc. to get into refrigerant cycle (piping)
RISK OF EXPLOSION Compressor must be stopped before removing refrigerant pipes. All service valve must be fully closed after pumping down operation.

Refrigerant piping must be protected from physical damage. Install a plastic cover or equivalent.
above 200mm

above 300mm must not bend about
400mm

Maximum pipe length 30m Minimum pipe length 3m

above 100mm

! WARNING
Flare connection only at outside of building

above 100mm
give clearance as wide as possible

The indoor piping should be insulated with the enclosed insulation pipe. (If the insulator is insufficient, please use commercial products).
The difference in height between the indoor and outdoor unit should be kept max 20m.
The connecting pipe, no matter big or small, should all be insulated with insulation pipe and then wrapped with vinyl tape. (The insulator will deteriorate if it is not wrapped with tape).
The connection of insulated drain hose.
inner diameter ø 16mm

above 100mm

above 700mm

Figure 1

Please use insulated drain hose for the indoor piping (commercial product).
above 200mm

OUTDOOR UNIT
100 mm ABOVE

Please mount the Outdoor unit on stable ground to prevent vibration and increase of noise level. Decide the location for piping after sorting out the different types of pipe available. When removing side cover, please pull the handle after undoing the hook by pulling it downward.
Please face this side (suction side) of the unit to the wall.
Please remove side cover when connecting the piping and connecting cord.
Pull downward

CONDENSED WATER DISPOSAL OF OUTDOOR UNIT There are holes on the base of Outdoor unit for condensed water to exhaust. In order to flow condensed water to the drain, the unit is installed on a stand or a block so that the unit is
100mm above the ground as shown figure. Join the drain pipe to one hole. At first insert one portion of the hook to the base (Portion A), then pull the drain pipe in the direction shown
by the arrow while inserting the hook into the base. After installation, check whether the drain pipe cling to the base firmly.

A BASE

DRAIN PIPE

BUSH

BUSH DRAIN PIPE

When Using and Installing In Cold Areas
When the air conditioner is used in low temperature and in snowy conditions, water from the heat exchanger may freeze on the base surface to cause poor drainage. When using the air conditioner in such areas, do not install the bushings. Keep a minimum of 250mm between the drain hole and the ground. When using the drain pipe, consult your sales agent.
For more details, refer to the installation Manual for Cold Areas.

WARNING
To fulfill our obligations towards Article 33, in accordance to European REACH Regulation No 1907/2006 EC, we hereby inform you that this article contains the following Substances of Very High Concern mentioned on the Candidate list:
Lead

INSTALLATION OF REFRIGERATING PIPES AND AIR REMOVAL

1 Preparation of Pipe
Use a pipe cutter to cut the copper pipe.

Copper pipe

Trimming tool

! CAUTION
Jagged edge will cause leakage. Point the side to be trimmed downwards during trimming to prevent copper chips from entering
the pipe. Before flaring, please put on the flare nut.

Die
Outer Diameter mm (inch)
6.35 (1/4″) 9.52 (3/8″) 12.70 (1/2″) 15.88 (5/8″)

Die Copper pipe

Recommend to use R32 flaring tool.

Thickness (mm)
0.8 0.8 0.8 1.0

Flare tool for R32 Clutch type
0.0 ~ 0.5 0.0 ~ 0.5 0.0 ~ 0.5 0.0 ~ 0.5

A (mm)

Conventional flare tool

Clutch type Wing nut type

1.0 ~ 1.5

1.5 ~ 2.0

1.0 ~ 1.5

1.5 ~ 2.0

1.0 ~ 1.5

1.5 ~ 2.5

1.0 ~ 1.5

1.5 ~ 2.5

2 Pipe Connection

! CAUTION

In case of removing flare nut of an Indoor unit, first remove a nut of small diameter side, or a seal cap of big diameter side will fly out. Prevent water from entering into the piping when working.

Wrench

Flare nut
Torque wrench

Outer dia.of pipe

Torque N·m (kgf · cm)

Small dia. side Large dia. side

6.35 (1/4″) 14.0 ­ 18.0 (140 ~ 180)
9.52 (3/8″) 33.0 ­ 42.0 (330 ~ 420) 12.70 (1/2″) 50.0 ­ 62.0 (500 ~ 620) 15.88 (5/8″) 63.0 ­ 77.0 (630 ~ 770)

Valve head cap

Small dia. side 6.35 (1/4″)
9.52 (3/8″) Large dia. side 12.7 (1/2″)
15.88 (5/8″)

Valve core cap

19.6 ­ 24.5 (200 ~ 250)
19.6 ­ 24.5 (200 ~ 250) 29.4 ­ 34.3 (300 ~ 350) 29.0 ­ 31.0 (296 ~ 316)
12.3 ­ 15.7 (125 ~ 160)

3 Removal Of Air From The Pipe And Gas Leakage Inspection

AIR REMOVAL

Procedures of using Vacuum Pump for Air Removal
As shown in right figure, remove the cap of valve core. Then, connect the charge hose. Remove the cap of
1 valve head. Connect the vacuum pump adapter to the
vacuum pump and connect the charge hose to the adapter.

Fully tighten the “Hi” knob of the manifold valve and

2

completely unscrew the “Lo” knob. Run the vacuum pump for about 10~15 minutes, then completely tighten

the “Lo” knob and switch off the vacuum pump.

Remove the charge hose and tighten the cap of valve
3 core. Check the cap’s periphery if there is any gas
leakage.

Completely unscrew the spindle of the service valve (at
4 2 places) in anti-clockwise direction to allow the flow of
refrigerant (using Hexagonal Wrench key).

Re-cap the service valve and tighten using wrench.
5 Check the cap’s periphery if there is any gas leakage.
The task is then completed.

When the meter reaches – 101KPa (-76cmHg) during pumping, fully tighten the shuttle.
Meter showing pressure Closed R32

Lo Hi

Charge hose

Valve

Valve

Manifold valve Vacuum pump

Vacuum pump adapter

When pumping starts, slightly loosen the flare nut to check of air sucked in. Then tighten the flare nut.

The body of service valve

Cap of valve head

Cap of valve core Hexagonal Wrench Key
Cap of valve head

! CAUTION
Prevent moisture from entering pipe connection. Refrigerating machine oil not be applied to the outside of the
flare. When refrigerating machine oil is applied to the outside of the flare, excessive tightening of the flare nut, cracking of the flare nut, destruction of the flare and gas leakage may occur. When using the control valve, do not use deteriorated packing. And, do not overtighten the steering wheel. Gas leakage from the service valve part, stagnation, touching fire, rarely cause ignition.

Gas Leakage Inspection
Please use gas leakage detector to check if leakage occurs at the connection of Flare nut as shown on the right.
If gas leakage occurs, further tighten the connection to stop leakage. (Be sure to use R32 detector)

! WARNING THIS APPLIANCE MUST BE EARTHED. Procedures of Wiring

Indoor Unit

Outdoor Unit

Connecting cord Power cord

Detail of Cutting the Connecting Cord
Indoor Unit

Outdoor Unit

Strip wires Green + Yellow (ground)

Strip wires Green + Yellow Connecting cord
Power line

Connecting cord

Green + Yellow (ground)

Wiring of The Outdoor Unit
Please remove the side plate for wire connection.

!
WARNING

If you cannot attach the side plate due to the connection cord, please press the connecting cord in the direction to the front panel to fix it.
Be sure that the hooks of the side plate is fixed in certainly. Otherwise water leakage may occur and this causes short circuit or faults.
The connecting cord should not touch to service valve and pipes. (It becomes high temperature in heating operation.)

Checking for the electric source and the voltage range

Before installation, the power source must be checked and necessary wiring work must be completed. To make

the wiring capacity proper, use the wire gauge list below for the wiring from house distribution fuse box to the

outdoor unit in consideration of the locked rotor current.

Investigate the power supply capacity and other electrical conditions at the

installing location.

Depending on the model of room air conditioner to be installed, request the customer to make arrangements for the necessary electrical work etc.

Cover

The electrical work includes the wiring work up the outdoor unit. In

localities where electrical conditions are poor, use of a voltage regulation

is recommended.

Earth terminal

Install outdoor for the room air conditioner within the reaching range of the

line cord.

For (Power cord – L, N, Earth) Wire cross-section 2.5 mm2

For (Connecting cord – 1, 2, 3, Earth)

Wire length Wire cross-section

up to 30 m

1.5mm2

IMPORTANT Circuit Breaker 20A

CAUTION
Outdoor supply cords shall not be lighter than polychloroprene sheathed flexible cord with code designation 60245 IEC 57.

! WARNING
The naked part of the wire core should be 10 mm and fix it to the terminal tightly. Then try to pull the individual wire to check if the contact is tight. Improper insertion may burn the terminal.
Be sure to use only wire specified for the use of air-conditioner.
Please refer to the manual for wire connection and the wiring technique should meet the standard of the electrical installation.
There is an AC voltage drop between the LN terminal if the power is on. Therefore, be sure to remove the plug from its socket.

! WARNING
Leave some space in the connecting cord for maintenance purpose and be sure to secure it with the cord band.
Secure the connecting cord along the coated part of the wire using the cord band. Do not exert pressure on the wire as this may cause overheating or fire.

CONNECTION OF POWER CORD

FINAL STAGE OF INSTALLATION

1 Insulation And Maintenance Of Pipe Connection
The connected terminals should be completely sealed with heat insulator and then tied up with rubber strap.
Please tie the pipe and power line together with vinyl tape as shown in the figure showing the installation of Indoor and Outdoor units. Then fix their position with holders.
To enchance the heat insulation and to prevent water condensation, please cover the outdoor part of the drain hose and pipe with insulation pipe.
Completely seal any gap with putty.
Insulation material for pipe connection

Sleeve of protection pipe
Putty

Putty

2 Power Source And Operation Test
Power Source
! WARNING
Never remodel the power plug nor extend the longdistance cord.
Keep additional length for the power cord and do not render the plug under external force as this may cause poor contact.
Do not fix the power cord with U-shape nail. The power cable easily generates heat. Do not bring
the cable together with a wire or vinyl tie.

Operation Test

Please be sure to measure the supply voltage before operation test.
Please ensure that the air conditioner is in normal operating condition during the operation test. 1. Operate with Cool Mode(in summer) or Heat Mode(in winter). 2. Press Temperature Button on the remote controller to set the desired temperature to 16.0°C for Cool Mode or 32.0°C for Heating Mode.

Set the desired fan speed to ”

“(High).

3. Operate the air conditioner for 20 minutes at least and make sure that the air from the air conditioner is cool or warm.
4. Press the ON/Off button on the remote controller to make sure that the air conditioner stops running.
If the indication lamps of the indoor unit blink with sounding the buzzar during the operation test, perform a check following the procedures below.

Indication lamps blinking mode

What do check

All indication lamps blink three times repeatedly.

Make sure that the spindles of both service valves are open. (Outdoor fan might operate for near 15 minutes after the operation stop for the protection. For the reoperation at that case, do it after outdoor fan will stop.)

Before the check and the reoperation, reset the power supply by turning off and on the circuit breaker only after:1. waiting for at least 5 mintes; or 2. pressing the Temporary Switch Button only once while the power is OFF.

! CAUTION
Don’t operate for over 5 minutes with the situation that the spindle of the service valve is closed. This will cause the defect.
Don’t operate by Cool Mode or Dry Mode with the door and windows opened, (the room humidity is always above 80%) for a long period of time. Water will condense and drip down occasionally. This will wet your furniture.
Explain to your customer the proper operation procedures as described in the user’ s manual.
If the indoor unit won’t operate, check the cable for correct connection.
Turn on the lamp in the room where the indoor unit is installed and check the remote controller for normal operation.

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