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To Fill the Closed Circuit
It is necessary to fill the heat exchanger and solar collectors with closed circuit fluid before the water heater
can be operated. Refer to
Note: Care must be taken to ensure there is no spillage of the closed circuit fluid onto the roof surface,
particularly if the roof is part of a rainwater collection system. Any spilled closed circuit fluid must be cleaned
up immediately and the roof surface cleaned of any fluid residue.
To fill the heat exchanger:
•
Remove the retaining clip and 200 kPa pressure relief valve from the tank vent socket located on the right
hand end of the solar storage tank.
This is the fill level for the closed circuit fluid and will allow air to escape during filling.
•
Connect a hose to the Fill / Drain Valve port located at the bottom right hand corner of the right hand solar
collector.
•
Open the Fill / Drain Valve by loosening (but do not remove) the valve screw on the drain port a few turns.
•
Using a funnel placed in the end of the hose, pour water into the system through the funnel until water
flows from the vent socket. Note: the funnel must be held at a level that is above the vent socket.
•
Close the Fill / Drain Valve by tightening the valve screw.
•
Insert the 200 kPa pressure relief valve into the vent socket and secure with the retaining clip.
•
Pressurise the closed circuit system up to 200 kPa and leave for ten minutes.
•
Check the system for leaks at all connections.
•
If no leaks are evident:
▪
open the Fill / Drain Valve by loosening (but do not remove) the valve screw on the drain port a few
turns,
▪
remove the retaining clip and 200 kPa pressure relief valve,
▪
using a funnel placed in the end of the hose, pour the required contents of the Coolblend concentrate
fluid bottle(s) into the system through the funnel,
▪
Water will be displaced through the vent socket as the Coolblend concentrate is added.
▪
add a further 500 ml of water to flush the Coolblend concentrate through the hose and into the
collector.
•
Close the Fill / Drain Valve by tightening the valve screw.
•
Insert the 200 kPa pressure relief valve into the vent socket and secure with the retaining clip.
•
Pressurise the closed circuit system up to 200 kPa and leave for ten minutes.
•
Check the system for leaks at all connections.
•
When satisfied there are no leaks
present, remove the hose from the
Fill / Drain Valve.
Clean up any spilt closed circuit
fluid.
Note: The closed circuit fluid level
should be checked every five (5) years
or at each major service and if required
topped up or replaced.
The closed circuit fluid contains food
grade additives (rust inhibitor, anti-
freeze agent, colour) and is harmless to
the environment. However, it is good
practice to recover any excess closed
circuit fluid and remove from site.
diagram
on page 67.
Filling The Closed Circuit With Closed Circuit Fluid
67
COMMISSIONING
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