Advertisement
7
Water to Water Heat Pump (WTW)
7.4. Field wiring
7.4.1 Electrical Connection
All electrical work should be carried out by a suitably quali-
fied 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
Meaning
abbreviation
ECB2
Earth leakage circuit breaker for immersion
heater
TB1
Terminal block 1
TB2
Terminal block 2
Connections should be made to the terminals indicated in
the figures.
Immersion heater should be connected independently from
one another to dedicated power supplies.
<FRONT>
ECB2
Outputs
Inputs or
PICV outputs
TB1
TB2
<Figure 7.4.1>
B-212
<RIGHT SIDE>
1
D
2
3
4
5
7
8
6
C
Locally supplied wiring should be inserted through the inlets
situated on the top of the heat pump unit. (Refer to <Table
7.1.1>.)
Wiring should be fed down the back right hand side of the
control and electrical box.
The wires should be inserted individually through the ca-
ble inlets as below.
Connect the power cable for the immersion heater to
ECB2.
• Avoid contact between wiring and parts ( ).
• Make sure that ECB2 is ON.
• When connecting PICV, connect the terminal and
PICV
The wires should be fixed with the cable straps as below
• Immersion heater cables should use the cable strap
.
• Output cables should use the cable strap
• Input cables, PICV power cables, and PICV output ca-
bles should use the cable strap
• Power cables should use the cable strap
On completion of wiring ensure main remote controller ca-
ble is connected to the relay connector.
* Before connecting the main remote controller cable, re-
move the fastener bundling the cable between the power
circuit board and the relay connector.
Caution: Do NOT remove the band bundling the cable be-
tween the main remote controller and the relay connector,
or the heat pump unit may malfunction due to electrical
noise of the power circuit board. (See Figure 7.4.2.)
Main remote
controller
A
B
,
,
.
.
Power circuit
board
Band
*Do NOT remove
Relay connector
<Figure 7.4.2>
,
,
.
Fastener
Advertisement
