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MAINS WATER SUPPLY
Where the mains water supply pressure exceeds that shown in the table below,
an approved pressure limiting valve is required. Refer to the Owner‟s Guide
and Installation Instructions supplied with the storage tank for the position of
the pressure limiting valve.
Model
Relief valve setting
Expansion control valve setting *
Max. mains supply pressure
With expansion control valve
Without expansion control valve
Min. mains supply pressure
* Expansion control valve not supplied with the water heater.
A minimum water supply pressure of 200 kPa is required to enable the heat
pump circulator and heat pump system to operate effectively.
TANK WATER SUPPLY
If the water heater is supplied with water from a tank supply and a minimum
water supply pressure of 200 kPa at the water heater cannot be achieved, then
a pressure pump system must be installed to allow the heat pump circulator to
operate and avoid air locks in the circuit. Care must be taken to avoid air locks.
The cold water line from the supply tank should be adequately sized and fitted
with a full flow gate valve or ball valve.
PURGING AIR FROM THE SYSTEM
The water heater system must be purged of air prior to operation, using the
manual air bleed valve supplied on the storage tank. Failure to bleed the air out
of the connecting pipe work and heat pump module will result in non-operation
of the circulator and failure of the heat pump to operate due to overheating.
270, 325, 410
1000 kPa
850 kPa
680 kPa
800 kPa
200 kPa
7
INSTALLATION
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