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COMMISSIONING
67
luid:
ct the drain line and remove the
19. Drain closed circuit fluid from the heat exchanger if required.
To drain closed circuit f
If not already removed, disconne
spring clip from the solar circuit relief valve at the top of the solar
storage tank and remove the valve
(refer to step 6).
Warning: The solar circuit may be under pressure. Take care
wh
graduated volumetric
until the level of fluid in the
n the solar storage tank.
rage tank
e agent, colour) and is harmless to the
cover any excess fluid
side of the solar storage
tank.
20. If water has been added to or closed circuit fluid has been drained from
the heat exchanger, recommence this procedure from step 10.
en removing the solar circuit relief valve, as a sudden discharge of
pressurised hot vapour may be experienced. This discharge will
create a sharp sound of vapour being released.
Place the end of the solar fluid hose into a
container and drain closed circuit fluid
hose is at the desired level as marked o
It may be necessary to drain off the closed circuit fluid in small
amounts, raising the hose back to the top of the solar sto
and noting the level of the closed circuit fluid in the clear hose each
time, so as not to drain below the desired level.
Note: The closed circuit fluid contains food grade additives (rust
inhibitor, anti-freez
environment. However, it is good practice to re
and remove from site for appropriate disposal.
Re-affix the hose to the same location on the