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Solar Circuit Circulation
Disconnect the hot sensor lead from the solar control
8.
board inside of the lower front cover of the solar storage
tank.
It is important, at the end of this procedure when the
commissioning and checking of the solar circuit is
complete, to reconnect the hot sensor lead, otherwise
when the electrical supply is switched on, the solar pump
will deactivate after one hour and the solar control unit will
then enter a fault mode and no solar gain will be achieved.
Switch on the electrical supply at the power outlet to the solar storage tank.
9.
Warning: Take care not to enter the area inside the solar storage tank behind the lower front cover
whilst the power is on as the electrical circuit will be live.
The red LED on the solar monitor label, located above the lower front cover opening, will start flashing.
The pump will activate and commence pumping closed circuit fluid around the solar circuit.
The level of the closed circuit fluid in the clear hose will slowly drop to the dynamic operating level.
Allow the pump to operate for three (3) minutes (one or two collector systems) to allow the solar circuit to
fill with closed circuit fluid and stabilise.
Note: The solar pump will operate for one hour with the hot sensor lead disconnected, before automatically
turning itself off
(refer to step
Check the closed circuit fluid is circulating around the solar circuit.
10.
To check circulation:
Listen for the trickling sound of the closed circuit fluid returning into the heat exchanger by placing
your ear against the side toward the top of the solar storage tank.
If the fluid is circulating around the solar circuit, a trickling sound will be heard as the fluid returns
back into the heat exchanger.
If no trickling sound is heard, check:
the hot sensor lead is disconnected at the solar storage tank.
If connected, disconnect the hot sensor lead at the solar storage tank
Warning: Switch off the electrical supply at the power outlet to the solar storage tank before
entering the area inside the solar storage tank behind the lower front cover.
there is no leakage from the solar circuit. It is important to check all of the solar pipe work,
including in the roof space and on the roof.
If leaking, rectify any leaks in the solar circuit.
the height from the base of the storage tank to the top of the collectors has not exceeded the
maximum allowable height.
the length of solar hot and solar cold pipes has not exceeded the maximum recommended pipe
length.
If the maximum allowable height or the maximum recommended pipe length has been exceeded,
it may be necessary to relocate the solar collectors to either a lower level or closer to the solar
storage tank, or relocate the solar storage tank closer to the solar collectors. Refer to
Lengths"
on page 35.
12).
51
COMMISSIONING
disconnect hot
sensor lead
(refer to step
8).
"Pipe
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