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30mA
INSTALLATION MANUAL FOR OUTDOOR UNIT
25
5. Electric wiring
WARNING
DANGER OF BODILY INJURY OR DEATH
TURN OFF ELECTRIC POWER AT CIRCUIT BREAKER OR POWER SOURCE BEFORE
MAKING ANY ELECTRIC CONNECTIONS. GROUND CONNECTIONS MUST BE
COMPLETED BEFORE MAKING LINE VOLTAGE CONNECTIONS.
(1) Selection of size of power supply and interconnecting wires.
Precautions for Electric wiring
Electric wiring work should be conducted only by authorized personnel.
Do not connect more than three wires to the terminal block. Always use round type crimped terminal
lugs with insulated grip on the ends of the wires.
Use copper conductor only.
Select wire sizes and circuit protection from table below. (This table shows 20 m length wires with
less than 2% voltage drop.)
Item
Model
Phase
3
Switch breaker
(A)
Circuit breaker
Overcurrent protector
rated capacity (A)
Power source
wire size
(minimum)
30 20 2.5mm
2
1
40 26 4.0mm
2
Switch
breaker
Earth leakage breaker
Leak
current
30 30mA
40
HDU-24H03/H
HDU-28H03/H
HDU-42H03/H
4
90 for 6 sec.
90 for 6 sec.
3-way valve
2-way valve
6
6
Liquid pipe 9.52mm
Gas pipe 19.05mm
2-way valve
3-way valve
6
6
7
7
Valve rod cap
7
Valve rod cap
7
Service port cap
7
Service port cap
7
Valve rod cap
Detach the charge hose from the service port, open
2-way valve and 3-way. Turn the valve rod
anticlockwise until hitting lightly.
6
No gas leakage?
5
4
Open the valve rod for the 2-way valve to and angle of
anticlockwise 90 degree.
After 6 seconds later, close the 2-way valve and male
the inspection of gas leakage.
CAUTION:
If the refrigerant of the air conditioner leaks, it is necessary to make
all the refrigerant out, then charge the liquid refrigerant into air
conditioner according to the amount marked on the name plate.
7
8
After attaching the each caps, check the gas leakage
around the caps.
To prevent the gas leakage, turn the service port's
cap, the valve rod'd cap for 2-way valve and 3-way's
a lottle more than the point where the torque increases
suddenly.
In case of gas leakage, tighten
parts of pipe connection. If
leakage stops, then proceed
steps.
6
If it does not stop gas leakage, discharge whole refrigerants
from the serice port. After flaring work again and vacuumize,
fill up prescribed refrigerant from the gas cylinder.
3-way valve
2-way valve
Open
Service port
90
90
90
2-way valve
3-way valve
90
Service port
4
Open
3-way valve
2-way valve
Valve rod cap
3-way valve
2-way valve