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Additional Installation Information
System Fluid Expansion Tank Pre-charge Pressure Calculator
CAUTION
The pressure relief valve must be piped to the overflow
container or drain at all times, since excessively hot fluid
can discharge from the system.
CAUTION
After de-aeration, the air vent c/w shut-off at top of
system must be closed. To protect the solar system
from overheating in the summer, e.g. during the
holidays, do not shut off the power to the solar system.
36
Vitosol 100-FM/200-FM Installation, Operating and Service
The collector circuit must be protected during system
stagnation (emergency shutdown) such that no heat
transfer fluid can escape from the pressure relief valve or
the air vent located at the collector.
This is achieved by the appropriate sizing of the expansion
tank and matching of the system pressure.
IMPORTANT
Under cold fill conditions, a minimum static fluid pressure
must be maintained. It can be calculated by completing
the calculations in the table below:
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