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Regular maintenance
Cleaning and maintenance
2.4.3
Check pressure of the heating
system
Check the heating system water pressure
In buildings with up to three storeys, the optimum
water pressure in a cold heating system is between 1
and 2 bar. For a warm heating system, the optimum
water pressure is between 1.5 and 2.5 bar.
Fig. 2-8: Pressure gauge
If the water pressure is too low, fill the cold
heating system to approx. 2 bar. Do not fill to a
higher pressure, as water expands with increasing
temperature and the water pressure also rises when
the boiler is in heating mode. The safety valve triggers
at approx. 2.8 bar.
If the water pressure drops several times a year,
contact a heating professional. When refilling
water in the heating system, the same water as used
during initial filling should be used whenever possible
(e.g., prepared water).
2.4.4
Establish operational readiness
Switching on the boiler
Switch the boiler back on with the On/Off
switch.
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