COMMISSIONING
57
CLOSED CIRCUIT FLUID
Important:
It is recommended the solar storage tank be filled with water before charging the solar heat
exchanger with the closed circuit fluid.
The closed circuit concentrate is supplied in 1.5 litre bottles. Mix the required quantity of closed circuit
concentrate with the correct quantity of water to achieve the correct closed circuit fluid for the system. Failure
to mix the closed circuit fluid correctly may void the Rheem warranty.
System
Closed Circuit Concentrate Requirement for
Minimum Operating Temperature
Mixed Total
-8°C
-28°C
52H180 (1 collector)
1 x 1.5 litre bottle
2 x 1.5 litre bottles
4 litres
52H300 (2 collectors)
1 x 1.5 litre bottle
2 x 1.5 litre bottles
7 litres
52H300 (3 collectors)
2 x 1.5 litre bottle
3 x 1.5 litre bottles
9 litres
Caution:
Although the closed circuit concentrate is of food grade and non toxic, care must be taken not to
accidentally consume or spill any of the closed circuit concentrate when handling. Only use approved closed
circuit concentrate. If required, a Material Safety Data Sheet can be sought from Rheem.
While the closed circuit fluid is non toxic to humans, it does have an adverse effect on water stored in
rainwater tanks. It can cause an unpleasant odour to develop, render the rainwater foul and unfit for human
consumption and result in the rain water tank having to be drained and cleaned. Refer to
“Rain Water Tank”
on page 22.
Warning:
Although non-toxic, the following first aid advice and procedures should be followed if the
closed circuit concentrate comes into human contact or is spilt:
Swallowed - give milk or water and seek medical attention.
Eyes
– flush with flowing lukewarm water.
Skin - remove contaminated clothing and wash skin with water and soap.
Inhaled - seek fresh air, rest and keep warm.
Spilt - immediately remove contaminated clothing, stop leak source, absorb with a dry agent and
eliminate any ignition sources nearby.
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
diagram
on page 58.
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 rain water 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.
Open the Service Valve (used on collectors with screw fittings) or remove the screw from the Fill Plug
Assembly (used on collectors with conetite fittings) located at the bottom right hand corner of the right
hand solar collector.
Connect a hose to the Service Valve or Fill Plug Assembly.
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.