Rheem Water Heater - page 31

INSTALLATION – SOLAR STORAGE TANK
28
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 40).
Model 260
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 200 kPa
* Expansion control valve not supplied with the water heater.
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 solar circuit system to
operate. 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.