Calorex Pro-Pac 140, Owners & Installation Manual

Page: 15 / 104

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.
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).
Fig. 5
RECOMMENDED ELECTRICAL INSTALLATION FOR CALOREX HEAT PUMP
WITH SINGLE PHASE WATER PUMP.
L
N
WATER PUMP
MORE THAN 3/4 HP
SINGLE PHASE
SINGLE PHASE
SUPPLY TO SUIT
CAPACITY OF
WATER PUMP
L N
L N
L
N L
4 POLE N/O STARTER WITH
OVERLOAD AND 230V 50Hz
COIL RATED TO SUIT
WATER PUMP
N
L1 L2 L3
N
5
INTERL
OCK
CALOREX HEAT PUMP
THREE PHASE
1 2 3 4 7 6
SWITCHED FUSE ISOLATOR WITHIN
2m OF HEAT PUMP AND SIZED IN
ACCORDANCE WITH DATA SHEET
9 8
Fig. 4
LOCATION OF MAINS INPUT AND EXTERNAL INTERLOCK TERMINALS
N L1 L2 L3
D209450 ISS 1
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17
SOFT
START
STARTER
OR
EXTERNAL
FLOW
SWITCH
R1 R2 R3
N L1 L2 L3
D209450 ISS 1
MAINS SUPPLY IN
RUN
STANDBY
TEMP OK HEAT FAULT CHILL DEFROST MAINS CHILL LIMIT
WATER
TEMP
REMOVE SERVICE PANEL
(1/4 TURN FASTENERS)
15
SD566250 ISSUE 35