Electrical Work - DeDietrich AWHP 4 MR Installation Manual

5. Electrical work

5.1. Field electrical wiring
Outdoor unit model
Outdoor unit power supply
Outdoor unit input capacity Main switch (Breaker)
Outdoor unit power supply
Indoor unit-Outdoor unit earth
Outdoor unit L-N (single)
Outdoor unit L1-N, L2-N, L3-N (3 phase)
Indoor unit-Outdoor unit S2-S3
*1. A breaker with at least 3.0 mm contact separation in each poles shall be provided. Use earth leakage breaker (NV).
*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 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 codes.
2. Power supply cables and the cables between Interface unit/Flow temp. controller and outdoor unit shall not be lighter than polychloroprene sheathed
fl exible cables. (Design 60245 IEC 57)
3. Be sure to connect the cables between Interface unit/Flow temp. controller and outdoor unit directly to the units (no intermediate connections are al-
lowed).
Intermediate connections may result in communication errors. If water enters at the intermediate connection point, it may cause insuffi cient insula-
tion to ground or a poor electrical contact .
(If an intermediate connection is necessary, be sure to take measures to prevent water from entering the cables.)
4. Install an earth longer than other cables.
5. Do not construct a system with a power supply that is turned ON and OFF frequently.
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.
Never splice the power cable or the indoor-outdoor connection cable, otherwise it may result in a smoke, a fi re or communication failure.
5.2. Breaker size setting (only for AWHP8)
The breaker size can be changed with DIP switches SW7-4,5 on the Control board.
SW7
Both for indoor unit
4 5
and outdoor unit
OFF OFF 25A (Default)
OFF ON 20A
ON ON 16A
*1. Execute setting with the power of the unit OFF. The setting becomes valid when power is restored.
*2. Capacity restrictions may apply when operating under a high-load with a reduced breaker size.
AWHP4, 6MR AWHP8MR
~/N (single), ~/N (single),
50 Hz, 230 V 50 Hz, 230 V
*1 16 A
3 × Min. 1.5 3 × Min. 2.5
*2 1 × Min. 1.5 1 × Min. 1.5
*3 AC 230 V AC 230 V
*3 DC 24 V DC 24 V
Power
supply
Isolator
S1
S2
S3
Breaker size
Only for outdoor unit
20A
16A
—
AWHP11MR
~/N (single),
50 Hz, 230 V
25 A 32 A
3 × Min. 4
1 × Min. 1.5
AC 230 V
DC 24 V
3 poles isolator
S1
Indoor unit
S2
(Interface unit /
Flow temp.
controller)
S3
AWHP16MR AWHP11, 16TR
~/N (single), 3N~ (3 ph 4-wires),
50 Hz, 230 V 50 Hz, 400 V
40 A 16 A
3 × Min. 6 5 × Min. 1.5
1 × Min. 1.5 1 × Min. 1.5
AC 230 V AC 230 V
DC 24 V DC 24 V
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