Field Wiring - Mitsubishi Electric EHPT20Q-VM2EA Service Manual

7

FIELD WIRING

Breaker abbreviation Meaning
ECB Earth leakage circuit breaker for booster heater
TB1 Terminal block 1
TB2 Terminal block 2
Outdoor unit powered via cylinder unit
<1 phase>
Power
supply
Earth
~/N
leakage
230 V
circuit
50 Hz
breaker
*1
Outdoor unit
Power
supply
~/N
230 V
50 Hz
*1. Current sensitivity 10 mA, operating time 0.1 s.
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.
Description
Booster heater (Primary circuit)
Cylinder unit power supply
Cylinder unit input capacity
Main switch (Breaker)
Cylinder unit power supply (including earth cable)
Wiring
Wiring No. × size (mm²)
Cylinder unit - Outdoor unit (including earth cable)
Cylinder unit L - N
Circuit rating Cylinder unit - Outdoor unit S1 - S2
Cylinder unit - Outdoor unit S2 - S3
*2. A breaker with at least 3.0 mm contact separation in each pole shall be provided.
The breaker shall be provided to ensure disconnection of all active phase conductors of the supply.
*3. Use a breaker with an over-current protection function.
*4. Max. 15 m
*5. 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. Cylinder unit/outdoor unit connecting cables shall not be lighter than polychloroprene sheathed flexible cable. (Design 60245 IEC 57)
Cylinder unit power supply cables shall not be lighter than polychloroprene sheathed flexible cable. (Design 60227 IEC 53)
3. Install an earth longer than other cables.
4. Please keep enough output capacity of power supply for each heater. The lack of the power supply capacity may possibly cause chattering.
GCH15010
Wiring
circuit
breaker
or
Isolating
switch
S1
S2 Isolating switch
S3
Wiring
circuit
breaker
or
Isolating
switch
Electrical connections 1 phase
Power supply Capacity
230V N~ 50 Hz 2 kW
Cylinder unit
TB1
L
N
TB2
S1
S2
S3
ECB
For
L
booster
heater
N (Primary circuit)
Breaker Wiring
16 A *2 *3 3 × 2.5 mm²
~/N 230 V 50 Hz
*2 16 A
3 × Min. 2.5
*4 4 × Min. 2.5
*5 230 V AC
*5 230 V AC
*5 24 V DC
11
Tightening torque
TB1 2.0 ~ 2.5 Nm
TB2 2.0 ~ 2.5 Nm
ECB 1.3 ~ 1.7 Nm
earth 2.0 ~ 2.5 Nm