COMMISSIONING
48
17. 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 8.
E.g.: 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 8. It would be necessary to add one litre of
water to the heat exchanger.
E.g.: 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.
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 during step 8
mark
X mm’
above
static mark
mark between
Y mm’ and
Y + 150 mm’
below static mark
mark static level to achieve
MINIMUM FLUID LEVEL WITH PUMP OPERATING
Y mm’ greater
than 150 mm
above text
marking
150 mm
above text
marking
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