20
A2 Integral heat pump control unit IWS
B1 Temperature sensor heat pump flow
E1 Instantaneous water heater (DHC)
E2 Oil sump heater (WPL 10 A)
F1 Low pressure limiter
F2 High pressure limiter
F4 Hot gas temperature limiter
F5 High limit safety cut-out for DHC
Fig. 18
Wiring diagram WPL 7 AS
26_03_01_0604
F13 Frost protection temperature sensor
K2 Compressor contactor
K4 Fan contactor
K5 Instantaneous water heater relay
K6 Instantaneous water heater relay
M1 Compressor motor
M6 Fan motor
N1 Defrost end control thermostat
N2 Defrost pressure differential switch
N3 Oil sump heater thermostat
N4 Start-relay
X1 Terminals
X2 LV terminal
X3 Power supply
X4 Terminals - control
X23 Earth block - power supply
X27 Earth plug-in block
X28 Socket terminal strip
X29 Socket plug IWS 12-PIN
X30 Socket plug IWS 3-PIN
X33 Socket plug IWS 5-PIN
Y1 Changeover valve - defrost
Z1 Operating condenser, compressor
Z2 Operating condenser, fan
Z4 Condenser, compressor start
Mains
HP
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