Three-phase
. The standard 7.5, 9 and 12kW heaters can be configured to operate on three-phase by
carrying out the following modification:
a)
Remove brown wire from between L+ terminal block and contactor pole L2
b)
Remove brown wire from between L+ terminal block and contactor pole L3
c)
Connect L1 incoming phase wire to terminal block L+
d)
Connect L2 incoming phase wire directly to contactor pole L2
e)
Connect L3 incoming phase wire directly to contactor pole L3
It is vital that all wires are firmly terminated into each terminal. Ensure that the cable is of sufficient
diameter to ensure a good clamp is made. After termination, check all the cables for tightness and
replace both sets of covers.
The heater will not operate without a pump interlock supply that switches 220/230V ON when the filter
pump is running. The live of this supply should be connected to terminal A and the neutral to terminal B
of the heater. The supply must be taken from the last device switching the pump to ensure that the
heater will switch off at the same time as the filter pump.
This pump interlock supply can also be used to further control the operation of the heater. A time switch
can be fitted to interrupt the supply to terminal A; ensuring that it can only come on during specific periods
of cheap electricity. This is detailed on drawing APH 1319, together with arrangements for an override
switch allowing the filter pump to be run continuously.
Startup Procedure
a
)
Make sure that the pump is on and that there is at least the minimum flow of water through the
pool heater (IAW Fig.2). The heating elements will burn out if allowed to operate without sufficient
water flow.
b) Ensure heater breaker/switch is turned off. Check temperature control setting is turned down,
also, examine wiring for loose connections, etc.
c) Turn on power at main supply switch.
d) Turn up the heating controller to desired level.
If the high temperature manual reset switch shuts off the heater, disconnect power at the supply and
determine the cause before resetting.
The Control Panel
The control Panel has 6 to 8 indicating lights depending on heater model. The lights are as follows:
Heater Status Lights
Light
Description (when illuminated)
Right Hand Red
Heater has power
Left Hand Amber
Pump Interlock Supply OK
Left hand Red
Heater Turned On
White
Excess temperature Not Tripped
Right hand Amber
Pump Interlock Relay Energized
Green
Heating Elements Energized
