Safety valves
The water heater's safety valve sometimes releases a little water after hot
water usage. This is because the cold water, which enters the water heater
to replace the hot water, expands when heated causing the pressure to rise
and the safety valve to open. The climate system's safety valve must be
completely sealed and not release any water.
The function of the safety valves must be checked regularly. The valves are
accessed via the service hatch. Perform checks as follows:
1.
Open the valve by turning the knob anti-clockwise carefully.
2.
Check that water flows through the valve.
3.
Close the valve by releasing it. If it does not close automatically when
released, turn it anti-clockwise slightly.
4.
The climate system may need to be refilled after checking the safety valve,
see the section “Filling the climate system”.
F750, copper
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23NIBE™ F750Chapter 2 | The heat pump – the heart of the house
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