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COMMISSIONING
42
Closed Circuit Fluid Level
15. Measure the distance from the text marking “MINIMUM FLUID LEVEL WITH PUMP OPERATING”
to the closed circuit fluid dynamic level marked on the side of the solar storage tank during step 11.
The correct closed circuit fluid dynamic level for efficient operation of the system when the pump is
operating is between the “MINIMUM FLUID LEVEL WITH PUMP OPERATING” text marking on the
side of the solar storage tank and 150 mm above this mark.
If the closed circuit fluid dynamic level marked on the side of the solar storage tank during
step 11 is greater than 150 mm above the text marking, it will be necessary to drain closed
circuit fluid from the heat exchanger.
If the closed circuit fluid dynamic level is below the text marking, it will be necessary to add
water to the heat exchanger to top up the level of closed circuit fluid.
There is sufficient Hartgard concentrate in the solar circuit heat exchanger such that only water
needs to be added to the system if it is required to top up the level of closed circuit fluid.
Note: The operating dynamic level of the closed circuit fluid, upon the completion of
commissioning, must not be less than the “MINIMUM FLUID LEVEL WITH PUMP OPERATING”
text marking on the side of the solar storage tank or greater than 150 mm above this mark.
MINIMUM FLUID LEVEL WITH PUMP OPERATING
If the dynamic fluid level is greater
than 150 mm above the text marking, it
will be necessary to drain closed circuit
fluid from the heat exchanger
‘Y mm’
greater
than
150 mm
above text
marking
If the dynamic fluid level is below
the text marking, it will be necessary
to add water to the heat exchanger
‘X mm’
below text
marking