Specifications

INSTALLATION – SOLAR STORAGE TANK
24
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 38).
Model
160
Relief valve setting
1000 kPa
Expansion control valve setting *
850 kPa
Max. mains supply pressure
With expansion control valve
680 kPa
Without expansion control valve
800 kPa
Min. mains supply pressure **
140 kPa
* Expansion control valve not supplied with the water heater.
** In-series gas booster only – solar storage tank has no minimum mains supply pressure requirements.
TANK WATER SUPPLY
If the water heater is supplied with water from a tank supply and a minimum water supply pressure of
140 kPa at the water heater cannot be achieved, then a pressure pump system must be installed to allow the
in-series gas booster to achieve its rated flow and performance. 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. Consideration must be given to any minimum water supply requirements of another type of in-series
booster water heater.
Notes:
It is not recommended to install the in-series gas booster with a low pressure water supply.
If sludge or foreign matter is present in the water supply, it is recommended a suitable filter be
incorporated in the cold water line to the water heater.
The in-series gas booster is not suitable for connection to bore water or spring water unless a water
treatment device is fitted.
Refer to “Water Supplies” on page 14 for further information on water chemistry.