WALLTHERM
®
produced and developed by
Walltherm
®
30/64
Further security systems in the water circuit:
Pressure safety valve 3 bar:
As an additional security we mount a pressure
safety valve in the heating circuit of the boiler stove (between pump unit and boiler
stove) which opens when the pressure raises over 3 bar. In this case the heating
water can flow to the drain to avoid to high pressure inside the water circuit
Look Fig. 4.e.1
Expansion vessel: The heating circuit has to be provided with an expansion vessel
which has the correct dimension and a manometer.
When the pressure safety valve opened the pressure of the heating system is
low and therefore authorized personal (plumber) has to refill the system with the
correct operating pressure.
Normally the operation pressure is between 1,5 and 2,5 bar.
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