Setting Addresses And Operating Units; Test Run - Mitsubishi Electric CITY MULTI CMB-P-V-E Serie Manuel D'installation

s Never connect the power cable to the terminal board for control
cables. (Otherwise it may be broken.)
s Be sure to wire between the control wire terminal boards for
indoor unit, outdoor unit and BC controller.
Transmission cables are of crossover wiring method by non-polarized
2-wires.
Use 2-core shielding cables (CVVS, CPEVS) of more than 1.25mm
diameter for transmission cables.
The switch capacity of the main power to BC controllers and the wire
size are as follows:

6. Setting addresses and operating units

• The address switch of each BC controller is set to "000" when shipped
from the factory. Check it.
• Set the address switch to 1 + the address of the outdoor unit.
s The BC controller address should generally be set to 1 + the
address of the outdoor unit. However, if this would result in it
having the same address as another outdoor unit, set the ad-
dress between 51 and 100, making sure that it is different from
the address of other controllers.
• Please refer to the outdoor unit installation manual.

7. Test run

Before getting test run checked
s After installing, piping and wiring the indoor units and BC con-
trollers, check to see again that there is no refrigerant leakage
or no slack on power and control cables.
s Use a 500V megger to check that there is an insulation resist-
ance of more than 1.0MΩ between the power terminal bed and
the ground. If it is less than 1.0MΩ, do not get operated.
Caution:
Never measure the insulation resistance of the terminal bed for
control cables.
12
Switch (A)
Capacity Fuse
15 15
• For other detailed information, refer to the outdoor unit installation
manual.
2
in
Caution:
Do not use anything other than the correct capacity fuse and
breaker. Using fuse, conductor or copper wire with too large ca-
pacity may cause a risk of malfunction or fire.
Ensure that the outdoor units are put to the ground. Do not con-
nect the earth cable to any gas pipe, water pipe, lightening rod or
telephone earth cable. Incomplete grounding may cause a risk of
electric shock.
Wire size
Molded case Earth leak-
circuit breaker age breaker
20A 20A 30mA 1.6mm
0.1 s or less