10T8Y1B
VRV-W IV System Air Conditioner
4P399208-1 – 2015.01
Installation and operation manual
27
1
Intake for power supply wiring and pump operation output
(high voltage)
2
Intake for power pass-through wiring (in case of multi
outdoor unit system)
3
HP/LP stop valve (high temperature part)
4
Fix the power supply wiring and pump operation output
(high voltage) with the accessory clamp.
5
Insert the accessory clamp in the hole of the fixing plate for
stop valve.
6
Power supply wiring and pump operation output (high
voltage)
7
Approximately 50 mm
8
Power supply pass-through wiring
9
Fix the power supply wiring and pump operation output
(high voltage) with the accessory clamp to prevent them
from touching with the stop valve for discharge gas.
10
Use the through hole cover for power supply pass-through
by cutting the hatched area.
11
Hatched area
12
Insert the accessory clamp in the hole in the bottom of the
electrical component box.
13
Intake for transmission wiring (low voltage)
14
Make sure to provide for a downward loop in the
transmission wiring right in front of the location where the
wiring is to be fixed onto the top plate of the electrical
component box. This in order to prevent that condensate
drips off the wiring into the electrical component box.
15
Fix the transmission wiring with the accessory clamps.
16
Pass the transmission wiring (low voltage) through the wire
clip.
17
Fix the power supply wiring and pump operation output
(high voltage) to the bottom of electrical component box
with the accessory clamp.
18
Do not bundle the power supply wiring.
NOTICE
When routing earth wires, secure clearance of 50 mm
or more away from compressor lead wires. Failure to
observe this instruction properly may adversely affect
correct operation of other units connected to the same
earth.
When connecting the power supply, the earth
connection must be made before the current-carrying
connections are established. When disconnecting the
power supply, the current-carrying connections must
be separated before the earth connection is. The
length of the conductors between the power supply
stress relief and the terminal block itself must be as
such that the current-carrying wires are tautened
before the earth wire is in case the power supply is
pulled loose from the stress relief.
1
2
3
13
14
15
4
17
16
18
11
10
9
6
5
8
4
7
12
NOTICE
Precautions when laying power wiring:
Do not connect wiring of different thicknesses to the
power terminal block (slack in the power wiring may
cause abnormal heat).
When connecting wiring which is the same thickness,
do as shown in the figure below.
For wiring, use the designated power wire and
connect firmly, then secure to prevent external
pressure being exerted on the terminal board.
Use an appropriate screwdriver for tightening the
terminal screws. A screwdriver with a small head will
damage the head and make proper tightening
impossible.
Over-tightening the terminal screws may break them.
See the table below for tightening torque for the
terminal screws.
Tightening torque (N•m)
M5 (Power terminal block)
2.0~3.0
M5 (Earth)
3.2~3.9
M3 (Inter-unit wiring terminal block)
0.8~0.97
NOTICE
Recommendations when connecting the earth wire
Wire it so that it comes through the cut out section of the
cup washer. (An improper earth connection may prevent a
good earthing from being achieved.)
