Calorex Pro-Pac Series Owners & Installation Manual page 15

LOCATION OF MAINS INPUT AND EXTERNAL INTERLOCK TERMINALS
1 2 3 4 5 6 7 8 9
N L1 L2 L3
D209450 ISS 1
Interlock
All units have interlock circuit incorporated in control circuit, brought out
to two terminals. These terminals are shorted out for factory testing.
The interlock may be used to control the heatpump from a remote
location or a built in flow switch.
RECOMMENDED ELECTRICAL INSTALLATION FOR CALOREX HEAT PUMP
On site shorting loop is to be removed and two wires taken to pair of
volt free contacts in water pump starter/contactor/relay or flow switch
so that the heat pump cannot operate unless water pump is operating
(see figs 5 and 6).
SINGLE PHASE
SUPPLY TO SUIT
CAPACITY OF
WATER PUMP
L
N
L N
N L
L
N
SD566250 ISSUE 35
STARTER
SOFT
OR
START
EXTERNAL
FLOW
SWITCH
MAINS SUPPLY IN
WITH SINGLE PHASE WATER PUMP.
SWITCHED FUSE ISOLATOR WITHIN
2m OF HEAT PUMP AND SIZED IN
ACCORDANCE WITH DATA SHEET
L
4 POLE N/O STARTER WITH
OVERLOAD AND 230V 50Hz
COIL RATED TO SUIT
WATER PUMP
N
WATER PUMP
MORE THAN 3/4 HP
SINGLE PHASE
Fig. 4
R1 R2 R3
RUN
WATER
TEMP STANDBY
CHILL TEMP
MAINS FAULT DEFROST HEAT CHILL LIMIT OK
N L1 L2 L3
D209450 ISS 1
Fig. 5
1
REMOVE SERVICE PANEL
(1/4 TURN FASTENERS)
CALOREX HEAT PUMP
THREE PHASE
5 6 8
2 3 4 7 9
N L1 L2 L3
15