INSTALLATION INSTRUCTIONS – CLOSED CIRCUIT SERIES
33
CLOSED CIRCUIT COMMISSIONING PROCEDURE
It is necessary to fill the heat exchanger and solar collectors with closed circuit fluid before the water heater can be
operated and solar contribution achieved. Ensure the solar storage tank is filled with water and the solar collectors are
covered with an opaque material.
Note:
Care must be taken to ensure there is no spillage of the closed circuit fluid onto the roof surface. Any spilled closed
circuit fluid must be cleaned up immediately and the roof surface cleaned of any fluid residue.
To fill the heat exchanger:
•
Connect a ½” hose to the Valve Drain port of the Fill Drain Valve Assembly (hose
to be supplied by installer).
Remove PR6 relief valve from the Tank.
Loosen (but do not remove) the Valve Screw in the Fill Drain Valve Assembly and
fill the closed circuit with water through the hose.
1
•
Continue filling until water overflows from the jacket relief valve port and there are
no air bubbles in the overflowing water.
2
•
Fit the Test Block and pressure gauge (from the commissioning kit) into the jacket
relief valve port.
3
•
Fit the PR6 or PR200 relief valve to the Test Block.
4
•
Tighten the Valve Screw in the Fill Drain Valve Assembly.
5
Important:
There should be no water spillage, however if more than 0.5 litres of water is spilled, repeat steps 1-5.
•
When charging the system using a PR6 Valve, pressurise the system until the PR6 Valve opens or until a pressure of
80kPa is read on the pressure gauge, whichever happens first.
•
When charging the system using a PR200 Valve, pressurise the system until the PR200 Valve opens or until a
pressure of 170kPa is read on the pressure gauge, whichever happens first.
•
Connect a bicycle pump / portable compressor to the Test Block and pressurise the
closed circuit until a pressure of 80kPa or 170kPa as applicable is read on the
pressure gauge or the relief valve opens, whichever occurs first.
Remove the bicycle pump / portable compressor from Test Block.
6
Warning:
Do not allow the closed circuit pressure to rise above 200kPa or permanent system damage may occur.
•
If the PR6 or PR200 relief valve opens during the pressure test, wait until the valve
re-seals before checking all connections later for leaks.
If the valve does not open during the pressure test then check all connections for any
evidence of leakage.
7
•
Ensure that the closed circuit pressure remains stable for at least 10 minutes.
8
•
If any leakage is observed at any of the connections, rectify the problem and repeat
steps 1 to 8.
9
•
Release the pressure from the closed circuit by removing the PR6 or PR200 relief
valve from the Test Block.
Once the pressure is relieved, replace PR6 or PR200 relief valve.
10
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