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INSTALLATION – SOLAR STORAGE TANK
MAINS WATER SUPPLY
Where the mains water supply pressure exceeds that shown in the table, an approved pressure limiting
valve is required and should be fitted as shown in the installation diagram
(refer to diagram on
page 28
).
Model 270, 340, 430
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, then a pressure pump system is
recommended to ensure a minimum water pressure of 200 kPa is achieved to allow the solar circuit
system to operate. Take care to avoid air locks.
18