Field Wiring - Mitsubishi Electric EHGT17D-YM9ED Service Manual

6

FIELD WIRING

Breaker abbreviation Meaning
ECB1 Earth leakage circuit breaker for booster heater
ECB2 Earth leakage circuit breaker for immersion heater (option)
TB1 Terminal block 1
Affix label A that is included with the manuals near each wiring diagram for heat pump units.
Power supply
3N~ 400 V 50 Hz
Power supply
3~ 400 V 50 Hz
Power supply
~/N 230 V 50 Hz
Description
Booster heater (Primary circuit)
Immersion heater (DHW tank) (Option)
Ground source unit power supply
Ground source unit circuit breaker capacity
Wiring No. × size (mm²)
Circuit rating
*1. If the installed earth leakage circuit breaker does not have an over-current protection function, install a breaker with that function along the same power line.
*2. A breaker with at least 3.0 mm contact separation in each pole shall be provided.Use earth leakage breaker (NV).
The breaker shall be provided to ensure disconnection of all active phase conductors of the supply.
*3. Use wires in conformity with design 60245 IEC 57.
*4. The values given in the table above are not always measured against the ground value.
Note: 1. Wiring size must comply with the applicable local and national codes.
2. Install an earth line longer than power cables
3. Please keep enough output capacity of power supply for each heater. Insufficient power supply capacity might cause chattering.
OCH722A
Wiring circuit
Earth leak-
age circuit
breaker
*1 *2
Wiring circuit
breaker or
Wiring circuit
breaker or
<Figure 6.1>
Electrical connections 3 phase
Power supply
3~ 400 V 50 Hz
~/N 230 V 50 Hz
Ground source unit power supply, earth
Ground source unit L1-N, L2-N, L3-N
TB1
L1
L2
breaker
To control board
N.F.
L3
Isolating
switch
N
ECB1
For
L1
booster heater
L2
(Primary circuit)
Isolating
switch
L3
ECB2
For
Immersion heater
L
(DHW tank)
Isolating
(Option)
N
switch
Capacity
9 kW
1 kW
*3
*4
13
Breaker Wiring
16 A *2 2.5 mm²
16 A *2 2.5 mm²
3N~ 400 V 50 Hz
16 A
5 × Min. 1.5
230 V AC