Mitsubishi Electric CITY MULTI CMB-WP108NU-AA Manual De Instalación página 12

6. Electrical work
 Consult all related regulations and power companies beforehand.
Warning:
Electrical work should be handled by qualified electrical engineers in
accordance with all related regulations and attached instruction manuals.
Special circuits should also be used. If there is a lack of power capacity or a
deficiency in electrical work, it may cause a risk of electric shock or fire.
 Open knockout holes.
(Recommend to use a screwdriver or the like for this work.)
 Connect all wires securely.
• Fix power source wiring to control box by using buffer bushing for tensile force.
(Conduit or the like.) Connect transmission wiring to transmission terminal bed
through the knockout hole of control box using ordinary bushing.
[Fig. 6.0.1]
C
[Fig. 6.0.2]
F
CMB-WP108NU-AA,CMB-WP1016NU-AA
CMB-WP108NU-AB, CMB-WP1016NU-AB
7. Setting addresses and operating units
The address switch of each HBC controller/Sub-HBC controller is set to "000" when
shipped from the factory.
• Set the address switch to an address that equals the lowest address of the indoor
units that are connected to the HBC controller/Sub-HBC controller plus 50.
8. Test run
8.1. Before commencing a test run please
check the following:
 After installing, piping and wiring the indoor units and HBC controllers,
check to see again that there is no refrigerant leakage, water leakage, the
indoor unit inlet and outlet piped backwards, and no slack on power and
control cables.
 Use a 500 V tester to check that there is an insulation resistance of more
than 1.0 MΩ between the power terminal block and the ground. If it is less
than 1.0 MΩ, do not operate the unit.
• When water has been supplied to the water pipework, purge the system of air.
The details of air purging can be found separately in the water circuit
maintenance manual.
12
B
A
J I
G
E
D
H
A Control box
C Remove
E Use conduit to keep the weight of the cable and external force from being applied to
the power supply terminal connector.
F Transmission wiring
H Clip cables here
J Knockout hole (for power source wiring) K Conduit

Never connect the power cable to the terminal board for control cables.
(Otherwise it may be broken.)
 Be sure to wire between the control wire terminal boards for indoor unit,
outdoor unit and HBC controller/Sub-HBC controller.
Use non-polarized 2-wire as transmission cables.
Use 2-core shielding cables (CVVS, CPEVS) of more than 1.25 mm
diameter as transmission cables.
The switch capacity of the main power to HBC controller/Sub-HBC controllers and
the wire size are as follows:
Switch (A)
Capacity Fuse
16 16
• For other detailed information, refer to the outdoor unit installation manual.
• Power supply cords of appliances shall not be lighter than design 245 IEC 53 or
227 IEC 53.
• A switch with at least 3 mm [1/8 in] contact separation in each pole shall be
provided by the Air conditioner installation that should be in accordance with local
and national codes.
Caution:
Do not use anything other than the correct capacity fuse and breaker. Using
fuse, conductor or copper wire with too large capacity may cause a risk of
malfunction or fire.
Ensure that the outdoor units are put to the ground. Do not connect the earth
cable to any gas pipe, water pipe, lightening rod or telephone earth cable.
K
Incomplete grounding may cause a risk of electric shock.
Electrical characteristics
Model
CMB-WP108NU-AA
CMB-WP1016NU-AA
CMB-WP108NU-AB
CMB-WP1016NU-AB
 Assign the HBC controller address that equals the lowest address of the
indoor units that are connected to the HBC controller/Sub-HBC controller
plus 50. However, if the address overlaps any other units' addresses,
assign the address that equals the next lowest address plus 50.
• Please refer to the outdoor unit installation manual.
Caution:
• Never measure the insulation resistance of the terminal block for any
control cables.
• Incomplete purging of the air in the system, closing of the valves upstream
or down stream of the pump etc. may cause the pump to operate with no
water flow and thus lead to pump failure.
• Ensure that the power is off when replacing a pump. Do not remove or
attach the pump connector with the power on. Otherwise pump will break.
After turning off the power, wait 10 minutes before commencing work.
B Knockout hole
D Power source wiring
G Use ordinary bushing
I Side frame
Molded case Earth leakage
circuit breaker breaker
20 A 30 mA
20 A 1.5 mm
0.1 s or less
HBC controller
Hz Volts MCA (A)
60 208/230 V 3.78/3.78
60 208/230 V 3.78/3.78
60 208/230 V 0.09/0.09
60 208/230 V 0.09/0.09
[AWG 16] in
2
Wire size
[AWG 15]
2
Pump motor
Output (kW)
0.176/0.176
0.176/0.176
-
-