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Pressure Testing
The solar water heater, including the collector circuit and solar collectors, is to
be isolated during the testing and commissioning of the heated water
reticulation system in a building, in accordance with Clause 11.1 and 11.3 (a) of
AS/NZS 3500.4.
It may be necessary to pressure test the collector circuit to comply with codes
and regulatory authority requirements or on other occasions where the solar
collectors and solar cold and solar hot pipe work are installed prior to the solar
storage tank, such as on a building site.
Direct Open Collector Circuit
Warning: The pressure applied to the solar circuit and solar collectors
during a pressure test of a direct open circuit system MUST NOT exceed
1000 kPa where HBT200, LCS or S collectors are installed, otherwise damage
may result to the solar collectors.
Direct Open System
If the solar collectors, solar pipe work and solar storage tank are installed and
commissioned together, then the flooding of the collector circuit with water
under mains pressure for a direct open circuit system and checking the pipe
work for leaks during the commissioning procedure can be substituted for the
pressure testing of the collector circuit.
Maximum Number of Collectors
The maximum recommended number of these selective surface collectors for
each tank size is:
Direct open circuit system
410, 415 litre tanks
220, 260, 270, 325 litre tanks
160, 165 litre tanks
SOLAR COLLECTOR LOCATION
– 3 x collectors
– 2 x collectors
– 1 x collector
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