Wiring Specifications; Field Electrical Wiring - Mitsubishi Electric PUHZ-SHW230YKA2 Service Manual

6

WIRING SPECIFICATIONS

B
L1 L2 L3 S1 S2 S3
N
E
D
For Power
B
Note: When multiple indoor units (hydroboxes) are connected to the outdoor unit, wire the PCB of either one of the indoor unit and the outdoor unit
(S1,S2,S3).
It is impossible to connect the PCBs of multiple indoor units to the outdoor unit.
FIELD ELECTRICAL WIRING (power wiring specifications)
Outdoor unit model
Outdoor unit power supply
Outdoor unit input capacity Main switch (Breaker)
Outdoor unit power supply
Indoor unit-Outdoor unit
Indoor unit-Outdoor unit earth
Remote controller-Indoor unit
Outdoor unit L-N (single)
Outdoor unit L1-N, L2-N, L3-N (3 phase)
Indoor unit-Outdoor unit S1-S2
Indoor unit-Outdoor unit S2-S3
Remote controller-Indoor unit
*1. A breaker with at least 3.0 mm contact separation in each poles 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 80 m. Total maximum including all indoor/indoor connection is 80 m.
• Use one cable for S1 and S2 and another for S3 as shown in the picture.
*3. The 10 m wire is attached in the remote controller accessory.
*4. The figures are NOT always against the ground.
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.
Notes: 1. Wiring size must comply with the applicable local and national code.
2. Power supply cords and Indoor/Outdoor unit connecting cords shall not be lighter than polychloroprene sheathed flexible cord.
(Design 60245 IEC 57)
3. Use an earth wire which is longer than the other cords so that it will not become disconnected when tension is applied.
Caution: Be sure to install N-line. Without N-line, it could cause damage to the unit.
Power supply
A-Control
Outdoor Unit
Warning:
· In 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.
· Turn on the main power when the ambient temperature is −20°C or higher.
· In below −20°C condition, it needs at least 12 hrs standby to operate in order to warm the electrical parts.
OCH594B
A
S1
S2
S3
A Indoor unit
B Outdoor unit
C Remote controller
C
D Main switch (Breaker)
E Earth
D
For Power
A A
C
E
E
*1
*2
*2
*3
*4
*4
*4
*4
Isolator
S1
S2
S3
Twin or triple system construction of the hydrobox is not
A allowed.
When the hydrobox is constructed as a slave, remote
E
controller must be connected by crossover wiring.
SHW230Y
3N~ (3 ph 4-wires),
50 Hz, 400 V
YKA2/YKA2R1: 32 A
YKA2R2: 25A
5 × Min. 4
Cable length 50 m: 3×4 (Polar)/
Cable length 80 m: 3×6 (Polar)
1 × Min. 2.5
2 × 0.3 (Non-polar)
230 V AC
230 V AC
24 V DC
12 V DC
3 poles isolator
S1
A-Control
S2
Indoor Unit
S3
12