RZQ71~12 RZQ100~140B7W1B
Split System air conditioners
4PW21412-1A
Installation manual
12
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 leakage breaker and fuse to the power supply
line.
(See figure 9)
■
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
Pre-run checks
■
Be sure to perform a test run.
■
Be sure to fully open the liquid-side and gas-side stop valves. If
you operate the unit with stop valves closed, the compressor will
break down.
■
Be sure to execute the first test run of the installation in cooling
mode operation.
■
Never leave the unit unattended with an open front panel during
test run.
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 leakage breaker
2
Fuse
3
Remote controller
1
2 3
1
Round pressure terminal
2
Cut out section
3
Cup washer
RZQ71
RZQ100~140V3
RZQ100~140W1
Minimum circuit
amps (MCA)
(*)
(*)
Stated values are maximum values (see electrical data of combination with
indoor units for exact values).
17.7
28.2
17.7
Recommended
field fuse
20 A
32
A
20
A
Wire type
(†)
(†) Only in protected pipes, use H07RN-F when protected pipes are not used.
H05VV-U3G
H05VV-U5G
Size
Wiring size must comply with the applicable local
and national code
Wire type of
wiring between
the units
H05VV-U4G2.5
NOTE
The earth leakage breaker must be a high-speed type
breaker of 30 mA (<0.1 s).
WARNING
Live parts can be easily touched by accident.
Never leave the unit unattended during installation or
servicing when the service panel is removed.
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?
■
Is the wiring between units connected in series
correct?
■
Are any of the wiring attachment screws loose?
■
Is the insulation resistance at least 1 M
Ω
?
-
Use a 500 V mega-tester when measuring
insulation.
-
Do not use a mega-tester for low-voltage
circuits.
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?
