Field Wiring - Mitsubishi Electric EHPT17X-VM2D Service Manual

7

FIELD WIRING

Breaker abbreviation Meaning
ECB1 Earth leakage circuit breaker for booster heater
ECB2 Earth leakage circuit breaker for immersion heater
TB1 Terminal block 1
Option 1: Cylinder unit powered via outdoor unit
(If you want to use independent source, go to the Mitsubishi website.)
<1 phase>
Affix label A that is included with the manuals near each wir-
ing diagram for cylinder unit and outdoor units.
Power supply
~/N 230 V 50 Hz
Description
Booster heater (Primary circuit)
Immersion heater (DHW tank)
Cylinder unit - Outdoor unit
Cylinder unit - Outdoor unit earth
Cylinder unit - Outdoor unit S1 - S2
Cylinder unit - Outdoor unit S2 - S3
Max. 45 m
*3.
If 2.5 mm² used, Max. 50 m
If 2.5 mm² used and S3 separated, Max. 80 m
The values given in the table above are not always measured against the ground value.
*4.
Notes: 1. Wiring size must comply with the applicable local and national codes.
2. Indoor unit/outdoor unit connecting cords shall not be lighter than polychloroprene sheathed flexible cord. (Design 60245 IEC 57)
Indoor unit power supply cords shall not be lighter than polychloroprene sheathed flexible cord. (Design 60227 IEC 53)
3. Install an earth line longer than power cables.
4. Please keep enough output capacity of power supply for each heater. Insufficient power supply capacity might cause chattering.
OCH714D
Wiring cir-
Earth
cuit breaker
leakage
or
circuit
Isolating
breaker
switch
*1 ,*2
Power supply
~/N 230 V 50 Hz
Power supply
~/N 230 V 50 Hz
<Figure 7.1>
Electrical connections 1 phase
Power supply Capacity
~/N 230 V 50 Hz 2 kW
6 kW
~/N 230 V 50 Hz 3 kW
*3
3 × 1.5 (polar)
*3
1 × Min. 1.5
*4
*4
25
Cylinder unit
TB1
L
Outdoor unit
N
To control
board
L S1
S1
S2
N S2
S3
S3
ECB1
Wiring
For
circuit
L booster
breaker or
heater
Isolating
N
(Primary circuit)
switch
ECB2
Wiring
circuit
For
L
breaker or Immersion
Isolating heater
N
switch (DHW tank)
Breaker Wiring
16 A 2.5 mm²
*2
32 A 6.0 mm²
*2
16 A *2 2.5 mm²
230 VAC
24 VDC
. If the installed earth leakage circuit
*1
breaker does not have an over-
current protection function, install a
breaker with that function along the
same power line.
. A breaker with at least 3.0 mm
*2
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.