COMMISSIONING
47
Closed Circuit Fluid Level
16. 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 12.
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 12 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 closed circuit 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 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.
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
150 mm
above text
marking
MINIMUM FLUID LEVEL WITH PUMP OPERATING
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