17
Pressure Relief Valve (PRV)
Rated at 6 bar, the PRV may discharge heat transfer fluid (Tyfocor® LS) which
must be channelled into a solar discharge vessel, capable of withstanding high
temperature discharge and containing the total collector volume. The container
should be secured so it cannot be removed or spilled.
The PRV should not be channelled into a drain or any pipe work which will allow it to
enter the normal water course.
Fitting the expansion vessel:
The expansion vessel must be located below the level of the connection from the
pump station.
The expansion vessel supplied includes an appropriate corrugated hose and threaded
connection to join the vessel to the pump station.
Temperature Reducing Vessel (TRV) (DF ONLY)
Also known as a ‘cooling vessel’ or ‘stratification vessel’, the TRV is highly
recommended. Due to high temperatures which can be experienced within the solar
loop, the TRV reduces the temperature of the heat transfer fluid before it enters the
expansion vessel and extends the lifetime of the expansion vessel.
Fitting the TRV:
With the direct flow vessel kit, which includes the TRV, a corrugated hose assembly is
included to join the expansion vessel to the TRV from the pump station.
Safety Vessel Connections
TRV
1
2
6
4
5
2
3
DF ONLY
1
PRV discharge point
2 Wall bracket
(supplied)
3 Discharge container
4 TRV kit
5 Expansion vessel
6 Dual stream pump station
Summary of Contents for Varisol DF
Page 1: ...Installation Manual ...
