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Alliance Appliances Pty Ltd
Rapid 26
Note. The hot and cold inlet pressures to the tempering valve can be quite different in some
piping arrangements.
For example.
If a pressure limiting valve(PLV) is installed on the cold water line to the water heater and
the cold water line to the tempering valve branches off before the PLV or is from another
cold water line in the premises, then an additional PLV of an equal pressure setting may be
required prior to the tempering valve.
WATER INLET AND OUTLET CONNECTION and DRAINS
The heater is designed for connection to mains water supply with a pressure within the range
of 200kPa to 1000kPa.
If the water supply pressure exceeds 1000kPa it must be reduced with an approved
pressure limiting valve that does not have a non return valve characteristic.
I.E. NO CHECK VALVE
The hot water delivery pipe sizes must be large enough to ensure adequate flow for each
outlet and appliance that will be connected.
Refer to the heaters technical specifications and local regulatory authority requirements for
assistance in selecting pipe sizes.
The minimum recommended cold and hot pipe size is DN20. In addition the cold water line to
the water heater should be the same size or bigger than the hot water line from the heater.
All pipe work must be cleared and purged of foreign matter before connection and before
attempting to operate the water heater. After first flow of water through the heater remove
and inspect the inlet fitting water filter. It should be free of any debris. Ref Diagram above
Any olive compression fittings used must have brass or copper olives.
A full flow gate valve or ball valve must be installed on the cold water line.
WATER
INLET
FITTING
FILTER
ASSEMBLY
GAS INLET
PRESSURE
TEST POINT
GAS INLET
ADAPTOR
PRESSURE
RELIEF VALVE
REMOVE
DRAIN
REMOVE CAP TO
CLEAN FILTER
AND TO DRAIN
OUTLET
FITTING
