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Outdoor Unit Installation; Air Purging; Wiring Diagram - Hitachi RAC-AJ10PCASM Installation & Operation Manual

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Front panel
Indoor unit
Outdoor unit
The figures in this manual are based on the external
view of a standard model. Consequently, the shape
may differ from that of the air conditioner you have
selected.
Caution:
1. Never fail to have an individual power circuit specifically
for the air conditioner. As for the method of wiring, refer to
the circuit diagram posted on the inside of the access door.
2. Comfirm that the cable thickness is as specified in the
power source specification.
3. Check the wires and make sure that they are all tightly
fastened after cable connection.
4. Be sure to install an earth leakage circuit breaker in wet or
moist areas.
Cable Specifications
Power cord
Capacity
(Btu/h)
Normal cross
Type
- sectional area
2
5K~13K
H05VV-F
0.75~1.5mm X3
14K~24K
H05VV-F
2
1.5~2.5mm X3
18K~30K
2
H05VV-F
1.5~2.5mm X3
18K~30K
H07RN-F
2
2.5mm X3
24K~36K
H07RN-F 2.5~
2
4.0mm
X3
2
24K~36K
1.5
mm
X5
H07RN-F
NOTE:
The cord may be different from the list above. It may be used as
the next list. And it can be larger.0-6A, use 0.75mm or 18AWG.
2
0-10A, use 1mm or 16AWG. 0-16A, use 1.5mm or 14AWG 0-20A,
2
use 2.5mm or 14AWG. 0-25A, use 2.5mm or 12AWG. 0-32A,
2
use 4mm

Wiring diagram

Warning:
Before obtaining access to terminals, all supply
circuits must be disconnected.
Make sure that the color of the wires in the outdoor
unit and terminal No. are the same as those of the
indoor unit, the details please refer to the wiring
diagram which is near the terminal inside the
Terminal (inside)
Cabinet
Chassis
Access door
Terminal(inside)
Power connecting cord1
Power connecting cord
Normal cross
Normal cross
Type
Type
- sectional area
- sectional area
2
H07RN-F
1.5mm X3
0.75mm X2
H05RN-F
(Heat-pump)
2
H05RN-F
0.75~1.0mm X3
0.75mm X2
H07RN-F
2
H05RN-F
1.5~2.5mm X3
(Heat-pump)
0.75mm X2
2
H07RN-F
1.5~2.5mm X4
H05RN-F
(Heat-pump&Optional)
2
1.0mm X3
H05RN-F
0.75mm X3
H05RN-F
2
1.0mm X4Cooling only
(Heat-pump)
H07RN-F
0.75mm X2
2
H05RN-F
0.75mm X4
H05RN-F
(Heat-pump&Optional)
2
H07RN-F
1.0mm X4
0.75mm X2
2
H05RN-F
0.75mm X4
H05RN-F
(Heat-pump)
2
2
2

Outdoor unit installation

1. Install Drain Port and Drain Hose (for heat-pump
model only)
The condensate drains
from the outdoor unit when
the unit operates in heating
mode. In order not to
disturb your neighbor and
protect the environment, install
a drain port and a drain hose to direct
the condensate water. Just install the drain port and
rubber washer to the chassis of the outdoor unit,
then connect a drain hose to the port as the right
figure demonstrates.
2. Install and Fix Outdoor Unit
Fix with bolts and nuts tightly on a flat and strong
floor. If installed on the wall or roof, make sure to fix
the supporter well to prevent it from shaking due to
serious vibration or strong wind.
3. Outdoor Unit Piping Connection
Remove the valve caps from the 2-way and 3-way
valve.
Connect the pipes to the 2-way and 3-way valves
separately according to the required torque.
4. Outdoor Unit Cable Connection (see previous
Main
power
page)
supply

Air purging

2
To indoor
2
To indoor
The air which contains moisture remaining in the
2
refrigeration cycle may cause a malfunction on the
To indoor
compressor. After connecting the indoor and outdoor
2
To outdoor
units, release air and moisture from the refrigerant
2
To outdoor
cycle using a vacuum pump, as shown below.
2
To outdoor
Note: To protect the environment, be sure not to discharge
the refrigerant to the air directly.
indoor unit
Refrigerant flow direction
3-way valve
unit.
(7) Turn to fully open the
Service
port
(2) Turn
(8) Tighten
Valve cap
5
Rubber pad (optional)
Place under the leg pedestal
2-way valve
(6) Open 1/4 turn
(7) Turn to fully open the valve
valve cap
valve
(1) Turn
(8) Tighten
(1) Turn
(8) Tighten
Connect to outdoor unit
Washer
Drain port
Drain hose
(prepared by user)
Vacuum pump
3-way valve diagram
connect to indoor unit
open position
spindle
needle
Valve core
service port cap

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