Wiring Specifications - Mitsubishi Electric PUHZ-FRP71VHA2 Service Manual

8

WIRING SPECIFICATIONS

8-1. FIELD ELECTRICAL WIRING (power wiring specifications)
Outdoor unit power supply
Outdoor unit input capacity Main switch (Breaker)
Outdoor unit power supply
Indoor unit – Outdoor unit
Cylinder– or Hydrobox – Outdoor unit
Indoor unit – Outdoor unit earth
Cylinder– or Hydrobox – Outdoor unit earth
Remote controller – Indoor unit *3
Cylinder– or Hydrobox-side remote controller – its unit
Outdoor unit L – N (single)
Outdoor unit L1 – N, L2 – N, L3 – N (3 phase)
Indoor unit – Outdoor unit S1-S2
Cylinder– or Hydrobox – Outdoor unit S1-S2
Indoor unit – Outdoor unit S2-S3
Cylinder– or Hydrobox – Outdoor unit S2-S3
Remote controller – Indoor unit
Cylinder– or Hydrobox-side remote controller – its unit
*1
A breaker with at least 3.0 mm contact separation in each pole shall be provided. Use earth leakage breaker (NV).
Make sure that the current leakage breaker is one compatible with higher harmonics.
Always use a current leakage breaker that is compatible with higher harmonics as this unit is equipped with an inverter.
The use of an inadequate breaker can cause the incorrect operation of inverter.
*2
Maximum 45 m
If 2.5 mm² used, maximum 50 m
If 2.5 mm² used and S3 separated, maximum 80 m
*3
Maximum 500 m (When using 2 remote controllers, the maximum wiring length for the remote controller cables is 200 m.)
The figures are NOT always against the ground.
*4
S3 terminal has 24 V DC against S2 terminal. However between S3 and S1, these terminals are NOT electrically insulated by the transformer or other device.
Caution: Be sure to install N-Line. Without N-Line, it could cause damage to the unit.
Notes: 1. Wiring size must comply with the applicable local and national code. .
2. Power supply cables and Indoor/Outdoor unit connecting cables shall not be lighter than polychloroprene sheathed flexible cable.
(Design 60245 IEC 57)
3. Install an earth line longer than power cables.
Power supply
A-Control
Outdoor Unit
Warning:
In the case of A-control wiring, there is high voltage potential on the S3 terminal caused by electrical circuit design that has no electrical insulation between
power line and communication signal line. Therefore, please turn off the main power supply when servicing. And do not touch the S1, S2, S3 terminals
when the power is energized. If isolator should be used between indoor unit and outdoor unit, please use 3-pole type.
1:1 system electrical wiring
Outdoor
unit
Unit
L
power B C
N
supply
Indoor/outdoor
unit connection
cable
S1
S2
B Earth leakage breaker
S3
C wiring circuit breaker or
isolating switch
Cylinder or
Hydrobox unit/outdoor
unit connection cable
S1
S2
S3
OCH665B
~/N (single), 50 Hz, 230 V
*1
*2
*2
2 × 0.3 (Non-polar)
*4
*4
*4
*4
Isolator
S1
S2
S3
Indoor
unit
1
Remote
controller
2
S1
S2
S3
Cylinder or
Hydrobox unit
1
Remote
controller
2
S1
S2
S3
13
25 A
3 × Min. 2.5
3 × 1.5 (Polar)
1 × Min. 1.5
230 V AC
230 V AC
24 V DC
12 V DC
3 poles isolator
S1
A-Control
S2
Indoor Unit
S3
Synchronized twin system electrical wiring
• Synchronized twin
Outdoor
unit
Unit
L
power
B C
supply N
S1
S2
B Earth leakage breaker
S3
C wiring circuit breaker or
isolating switch
S1
S2
S3
Indoor
unit
1
Remote
controller
2
Indoor/outdoor
unit connection
cable
S1
S2
S3
Cylinder or
Hydrobox unit
1
Remote
controller
2
Cylinder or
Hydrobox unit/outdoor
unit connection cable
S1
S2
S3
Indoor
unit
1
2
S1
S2
S3