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Solar Pool Heating System -- Installation & User Manual
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Vacuum Release Location
To make sure all air bubbles are evacuated upon filling collector should be installed
with a minimum recommended pitch of 3-5
˚.
Ideally the collector array top header pipe should have
a 1 to 2°
upward slope toward
the outlet, to make sure all air is automatically removed from the entire array upon
filling. This is especially important for system with row containing 10 or more panels.
The vacuum release is a critical part of the system and must be installed for all collector
array greater than 0.5m above the water level.
Why?
System without a vacuum release will experience large negative pressure working
forces as the pump stops and the water wants to fall back. The vacuum release on the
return line and the non-return on the supply line stop these pressure fluctuations.
