A
B
L N
S1 S2 S3
A
B
C
E
D
F
F
■ 50-140V (Single phase)
■
112-140Y (3 phase)
L1 L2 L3 N
S1 S2 S3
RP100-140Y
F
F
D
Service panel
E
Wire the cables so that they do
not contact the center of the
service panel.
F
Earth terminal
A
Earth terminal
B
Terminal block
C
Clamp
5
4. Drainage piping work
5. Water piping work
Outdoor unit pipe connection
When drain piping is necessary, use the drain socket or the drain pan (option).
Fig. 5-1
Fig. 6-1
Fig. 6-2
A
Indoor unit
B
Outdoor unit
C
Remote controller
D
Main switch (Earth leakage breaker)
E
Earth
Optional parts name
Model name
Drain socket
PAC-SG61DS-E
Drain pan for 50/85
PAC-SG64DP-E
*There is no optional drain pan for 112/140.
* The drain socket is applicable only to W50, W85 and W112 and not compatible with
HW112 and HW140.
Caution:
Be sure to install N-Line. Without N-Line, it could cause damage to unit.
6. Electrical work
6.1. Outdoor unit (Fig. 6-1, Fig. 6-2)
1
Remove the service panel.
2
Wire the cables referring to the Fig. 6-1 and the Fig. 6-2.
5.1. Water piping connection (Fig. 5-1)
• Connect the water pipes to the outlet and inlet pipes.
(Parallel male screw for 1-inch water pipe (ISO 228/1-G1B))
• Inlet and outlet pipes position is shown on the Fig. 5-1.
• Install the hydraulic filter at the water intake.
• Maximum allowable torque at the water piping connection is 50 N•m.
• Check if water leaks after installation.
• Inlet water gauge pressure must be between 0-0.3 MPa.
• Use the inlet water with a temperature lower than 55 ˚C.
Note :
• The water velocity in pipes should be kept within certain limits of material to
avoid erosion, corrosion and excessive noise generation.
Be aware, and take care of, that local velocities in small pipes, bends and
similar obstructions can exceed the values above.
e.g.) Copper : 1.5 m/s
• When connecting metal pipes made of different materials, be sure to insulate
the joint to prevent electrolytic etching.
• Set up a field system so that the inlet water temperature and water flow rate
can be within the allowable range specified in our technical data, etc.
If the unit is used out of the allowable range, the parts of unit might be damaged.
5.2. Water quality condition
• The water in a system should be clean and with a pH value of 6.5-8.0.
• The followings are the maximum values;
Calcium : 100 mg/L
Chlorine : 100 mg/L
Iron/manganese : 0.5 mg/L
[Fig. 5-1]
A
Water outlet
B
Water inlet
Note : Make sure to perform the frozen prevention measure for water pipe
system. (Water piping insulation, back-up pump system, using of a cer-
tain % ethylene glycol instead of normal water)
Insulate the water piping properly. The performance can be poor if the
insulation is insufficient.
Warning:
As the outlet water temperature can reach 60 ºC at maximum, do not touch the
water piping directly with a bare hand.
Model
Minimum water quantity (L)
W50
29
W85
37
W112
48
HW112
48
HW140
60
5.3. Minimum water quantity
Following water quantity is required in the water circuit.
For Power
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