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INSTALLATION
22
MAINS WATER SUPPLY
Where the mains water supply pressure exceeds that shown in the table below,
an approved pressure limiting valve is required and should be fitted as shown
in the installation diagram (refer to diagram on page 30).
Model
Refer to data tables
on pages 28, 29
Relief valve setting
1400 kPa
1000 kPa
Expansion control valve setting*
1200 kPa
850 kPa
Max. mains supply pressure
With expansion control valve
960 kPa
680 kPa
Without expansion control valve
1120 kPa
800 kPa
* Expansion control valve not supplied with water heater
TANK WATER SUPPLY
If the water heater is supplied with water from a tank supply and a pressure
pump system is not installed, then the bottom of the supply tank must be at
least 1 m above the highest point of the hot water plumbing system, including
the water heater. Care must be taken to avoid air locks. The cold water line to
the water heater should be adequately sized and fitted with a full flow gate
valve or ball valve.
PUSH THROUGH (FREE OUTLET)
INSTALLATION
It can be advantageous to plumb a
050 model water heater as a Push
Through water heater in some cases.
These installations can supply a
single point non-tempered non-
ablution outlet only. The temperature
pressure relief valve supplied with
this model must be fitted to the water
heater.
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