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8 Electrical
8.5 Heat Pump Wiring Diagram
The Main Connections you have to make
Fuse
Compressor
C
S
R
4-way
valve
Power Supply
Terminal
3 Connection points for installer
Figure 8-7: Heat pump connection diagram for 3kW electrical element
ATC controller
socket
20
Figure 8-8: Location of connections in control panel
230 Vac
24 Vac
Compressor
Heater
Orange
Red
N
3 2 1
ATC Controller
Socket
S-Plan controls
connections
Fan
motor
Expansion Valve
Ret Gas Sensor
Ext Temp Sensor
Coil Temp Sensor
Dis Gas Sensor
Ret Temp Sensor
3 2 1
S-Plan Controls
Connections
Power supply
terminal
12
24
11
23
10
22
9
21
8
20
7
19
6
18
5
17
4
16
3
15
2
14
1
13
Relay
KM2
Pump
3kW
Electric
Element
Disconnect
Electric Element
for Bivalent
Switched Output
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