Electrical Work - Mitsubishi Electric PUHZ-FRP71VHA Installationshandbuch

6. Electrical work

6.1. Outdoor unit (Fig. 6-1, Fig. 6-2)
1 Remove the service panel.
2 Wire the cables referring to the Fig. 6-1 and the Fig. 6-2.
S1 S2 S3
L N S1 S2 S3
For Power
For Power
6.2. Field electrical wiring
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
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 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. Max. 45 m
2
If 2.5 mm used, Max. 50 m
If 2.5 mm 2 used and S3 separated, Max. 80 m
*3. The 10 m wire is attached in the remote controller accessory.
*4. The fi gures are NOT always against the ground.
S3 terminal has DC 24 V 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, the Indoor-Outdoor connecting cable and the Cylinder- or Hydrobox-Outdoor connecting cable shall not be lighter than polychlo-
roprene sheathed fl exible 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.
Power supply
Isolator
S1
A-Control
S2
Outdoor Unit
S3
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.
Never splice the power cable or the indoor-outdoor, cylinder/hydro-outdoor connection cable, otherwise it may result in a smoke, a fi re or communication failure.
S1
S2
S3
S1
S2
S3
A Indoor unit
B Outdoor unit
C Remote controller
D Main switch (Breaker)
E Earth
Fig. 6-1
~/N (single), 50 Hz, 230 V
*1
*2
*2
*3 2 × 0.3 (Non-polar)
*4
*4
*4
*4
3 poles isolator
H
F Terminal block for power (L, N,
G Terminal block for Cylinder unit- or Hydrobox-Outdoor connection (S1, S2, S3)
H Service panel
I Clamp
* Clamp the cables so that they do not contact the center of the service panel or
the gas valve.
J Earth terminal for Indoor unit and either Cylinder unit or Hydrobox
K Cylinder unit or Hydrobox
L Remote controller for Cylinder unit or Hydrobox
Note :
If the protective sheet for the electrical box is removed during servicing, be sure to
reinstall it.
Caution:
Be sure to install N-Line. Without N-Line, it could cause damage to unit.
25 A
3 × Min. 2.5
3 × 1.5 (Polar)
1 × Min. 1.5
AC 230 V
AC 230 V
DC 24 V
DC 12 V
S1
A-Control
Indoor Unit
S2
Cylinder unit
or Hydrobox
S3
F
G
F
J
I
Fig. 6-2
) and Indoor-Outdoor connection (S1, S2, S3)
G
J
9