Installation manual
11
RZQ71~125B7V3B
Split System air conditioners
4PW16864-1A
■
Lay the electrical wiring so that the front cover does not rise up
when doing wiring work and attach the front cover securely.
1
Switch box
2
Stop valve mounting plate
3
Ground
4
Tie-wrap
5
Wiring between units
6
Power supply and ground wiring
■
When cables are routed from the unit, a protection sleeve for the
conduits (PG-insertions) can be inserted at the knock-out hole.
1
Wire
2
Bush
3
Nut
4
Frame
5
Hose
A
Inside
B
Outside
When you do not use a wire conduit, be sure to protect the wires
with vinyl tubes to prevent the edge of the knock-out hole from
cutting the wires.
■
Follow the electric wiring diagram for electrical wiring works.
■
Form the wires and fix the cover firmly so that the cover may be
fit in properly.
Precautions on wiring of power supply and inter-unit
wiring
■
Use a round crimp-style terminal for
connection to the power supply
terminal board. In case it cannot be
used due to unavoidable reasons,
be sure to observe the following
instruction.
-
Do not connect wires of different gauge to the same power
supply terminal. (Looseness in the connection may cause
overheating.)
-
When connecting wires of the same gauge, connect them
according to the below figure.
■
Use the correct screwdriver to tighten the terminal screws.
Small screwdrivers can damage the screw head and prevent
appropriate tightening.
■
Over-tightening the terminal screws can damage the screws.
■
See the table below for tightening torques for the terminal
screws.
■
Refer to the installation manual attached to the indoor unit for
wiring of indoor units, etc.
■
Attach an earth leak detector and fuse to the power supply line.
■
In wiring, make certain that prescribed wires are used, carry out
complete connections, and fix the wires so that outside forces
are not applied to the terminals.
Specifications of standard wiring components
T
EST
OPERATION
■
Be sure to fully open the liquid-side and gas-side stop valves.
■
For details on test operation, refer to the indoor unit installation
manual.
Pre-run checks
3
1
6
5
4
2
2
Tightening torque (N•m)
M4 (X1M)
1.2~1.8
M5 (X1M)
2.0~3.0
M5 (EARTH)
3.0~4.0
I
Pair
II
Twin
III
Triple
IV
Double twin
M
Master
S
Slave
1
Earth leak detector
2
Fuse
3
Remote controller
Power supply
Model
Recomm
ended
field fuse
Wire type
(*)
(*)
Only in protected pipes, use HO7RN-F when protected pipes are not used.
Size
Wire type of
wiring between
the units
RZQ71
20 A
H05VV-U3G
Wiring size must
comply with the
applicable local
and national code
H05VV-U4G2.5
125
30 A
H05VV-U3G
H05VV-U4G2.5
Items to check
Electrical wiring
Inter-unit wiring
Ground wire
■
Is the wiring as mentioned on the wiring
diagram?
Make sure no wiring has been forgotten and that
there are no missing phases or reverse phases.
■
Is the unit properly grounded?
■
Are any of the wiring attachment screws loose?
Refrigerant piping
■
Is the size of the piping appropriate?
■
Is the insulation material for the piping attached
securely?
Are both the liquid and gas pipes insulated?
■
Are the shut-off valves for both the liquid side and
the gas side open?
Extra refrigerant
■
Did you write down the extra refrigerant and the
refrigerant piping length?
