Field Wiring - Mitsubishi Electric EHPT17X-VM2E Service Manual

7

FIELD WIRING

7-1. 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 invalidate
product warranty. All wiring should be according to national wiring regulations.
Breaker abbreviation Meaning
ECB1 Earth leakage circuit breaker for booster heater
ECB2 Earth leakage circuit breaker for immersion heater
TB1 Terminal block 1
ECB1
ECB2
A
E
F B
C
D
TB1
<1 phase (with immersion heater)>
Option 1: Cylinder unit powered via outdoor unit
(If you want to use independent source, go to the Mitsubishi website.)
PXZ model is not available.
The model is Cylinder unit powered by independent source ONLY.
<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
Wiring No.
× size (mm²)
Cylinder unit - Outdoor unit earth
Cylinder unit - Outdoor unit S1 - S2
Circuit rating
Cylinder unit - Outdoor unit S2 - S3
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.
OCH814A
ECB1
A
E
B
D C
TB1
<3 phase (without immersion heater)>
Wiring cir-
Earth
cuit breaker
leakage
L
or
circuit
Isolating
breaker
N
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
*4
*4
The cylinder unit can be powered in two ways.
1. Power cable is run from the outdoor unit to the cylinder unit.
2. Cylinder unit has independent power source.
Connections should be made to the terminals indicated in the figures to the left
below depending on the phase.
Booster heater and immersion heater should be connected independently from
one another to dedicated power supplies.
Locally supplied wiring should be inserted through the inlets situated on the top
of the cylinder unit. (Refer to Table 5.1)
Wiring should be fed down the right hand side of the control and electrical box
and clamped in place using clips provided.
The wires should be inserted individually through the cable inlets as below.
Outputs wire
Indoor-Outdoor wire
Power line (B.H.)/ Power line (I.H.) (Option)
Signal input wires
Connect the outdoor unit – cylinder unit connecting cable to TB1.
Connect the power cable for the booster heater to ECB1.
If immersion heater is present, connect the power cable to ECB2.
• Avoid contact between wiring and parts (
• Make sure that ECB1 and ECB2 are ON.
• On completion of wiring, ensure main remote controller cable is con-
nected to the relay connector.
Cylinder unit
TB1
L
Outdoor unit
N
To control
board
S1
S1
S2
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 2.5 mm²
32 A *2 6.0 mm²
16 A *2 2.5 mm²
3 × 1.5 (polar)
1 × Min. 1.5
230 V AC
24 V DC
26
8
7
1 2 3 4 5 6
).
*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 circuit breaker (NV).
The breaker shall be provided to
ensure disconnection of all active
phase conductors of the supply.
*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 below are
not always measured against the
ground value.