Electrical Connection - Mitsubishi Electric Ecodan EHSC-VM6D-CN Installation Manual

4
Installation

4.4 Electrical Connection

All electrical work should be carried out by a suitably qualified technician. Failure
to comply with this could lead to electrocution, fire, and death. It will also invali-
date product warranty. All wiring should be according to national wiring regula-
tions.
Breaker abbreviation Meaning
ECB1 Earth leakage circuit breaker for booster heater
TB1 Terminal block 1
ECB1
B
en
A
<Figure 4.4.1>
Option 1: Hydrobox powered via outdoor unit
<1 phase>
Power supply
~/N 220 V 50 Hz
*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.
Hydrobox - Branch box
Hydrobox - Branch box earth
Hydrobox - Branch box S1 - S2
Hydrobox - Branch box S2 - S3
*3. Max. 45 m
If 2.5 mm² used, Max. 50 m
If 2.5 mm² used and S3 separated, Max. 80 m
*4. The values given in the table above are not always measured against the ground value.
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 longer than other cables.
4. Please keep enough output capacity of power supply for each heater. Insufficient power supply capacity might cause chattering.
11
E
D
C
<1 phase>
Earth Wiring
leakage
circuit
circuit
breaker or
breaker
Isolating
switch
*1, *2
Electrical connections 1 phase
Description
Booster heater (Primary circuit)
*3
*3
*4
*4
The hydrobox can be powered in below way.
▪ Power cable is run from the outdoor unit to the hydrobox.
Connections should be made to the terminals indicated in the figures to the left
below depending on the phase.
Booster heater should be connected from to dedicated power supplies.
Locally supplied wiring should be inserted through the inlets situated on the
base of the hydrobox. (Refer to <Table 3.3>.)
Wiring should be fed down the left hand side of the control and electrical box
and clamped in place using clips provided.
The wires should be fixed with the cable straps as below.
Connect the outdoor unit – hydrobox connecting cable to TB1.
Connect the power cable for the booster heater to ECB1.
• Make sure that ECB1 is ON.
Outdoor unit Branch box
TB1 TB1B TB2B
L B1 L
N B2 N
TB3*
TB3 TB5
S1
M1 M1
S2
M2 M2
S3
S S
Wiring
circuit
Power supply
breaker or
~/N 220 V 50 Hz
Isolating
switch
<Figure 4.4.2>
Power supply Capacity
1.8 kW
~/N 220 V 50 Hz
(Max.5.5 kW)
3 × 1.5 (polar)
1 × Min. 1.5
220 V AC
24 V DC
8
7
4 5
1 2
Vision A
Vision A
For optional thermistor
E
D
For Wi-Fi adaptor
Hydrobox
TB1
S1
To control
S2
board
S3
ECB1
For
L
booster
heater
N
(Primary circuit)
Breaker Wiring
15 A *2 6.0 mm²
(32 A)
6