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COMMISSIONING
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16. Determine the correct amount of water to be added to or closed circuit fluid to be drained from the
heat exchanger if the dynamic level is either below the text marking “MINIMUM FLUID LEVEL
WITH PUMP OPERATING” or more than 150 mm above this mark.
Each 100 mm of fluid level height is equivalent to three (3) litres of closed circuit fluid.
20 mm 0.6 litres 80 mm 2.4 litres 140 mm 4.2 litres
40 mm 1.2 litres 100 mm 3.0 litres 160 mm 4.8 litres
60 mm 1.8 litres 120 mm 3.6 litres 180 mm 5.4 litres
Mark the required closed circuit fluid level to be obtained on the side of the solar storage tank
with a non permanent marker beside the clear hose, in relation to the static level marked on the
side of the solar storage tank during step 7.
Eg: If the dynamic level is 30 mm below the text marking, then place a mark 30 mm above the
static level marked on the side of the solar storage tank in step 7. It would be necessary to add
one litre of water to the heat exchanger.
Eg: If the dynamic level is 180 mm above the text marking, then place a mark at least 30 mm,
but no more than 180 mm, below the static level marked on the side of the solar storage tank.
It would be necessary to drain between one litre and five litres of closed circuit fluid from the
heat exchanger.
If the dynamic fluid level is greater than
150 mm above the text marking, then
place a mark below the static level marked
on the tank of between equal to this
distance and this distance plus 150 mm.
‘Y mm’
greater
than
150 mm
above text
marking
If the dynamic fluid level is below the text
marking, then place a mark equal to this distance
above the static level marked on the tank
‘X mm’
below text
marking
static level marked on tank durin
g
ste
p
7
mark
‘X mm’
above
static mark
mark static level to achieve
mark between
‘Y mm’ and
‘Y + 150 mm’
below static
mark
mark static level to achieve
MINIMUM FLUID LEVEL WITH PUMP OPERATING