6.2
Check the supply line water pressure in the heating circuit
The supply line water pressure of the installation must be checked once a month. The pressure gauge must
show a value between 0.8-1.5 bar, depending on the system's requirements. If the value is below 0.8 bar, when
the water in the heating system is cold, the water must be topped up (applies in the event of an empty expan-
sion tank).
Normal tap water can be used when topping up the heating system. In certain exceptional cases the water
quality may be so poor (for example very hard water) that it is not suitable for filling the heating system.
If unsure, contact your installer.
N
Do not use any additives for water treatment
in the heating system’s water!
N
The closed expansion tank contains an air fil-
led expansion vessel that absorbs variations in
the heating system’s volume. Under no cir-
cumstances may it be drained of air.
6.3
Checking safety valves
The safety valves in the installation must be checked at least four times a year to prevent lime deposits clog-
ging the mechanism.
The safety valve of the water tank protects the enclosed heater against too high pressure in the water tank. It is
mounted on the cold water inlet line, its outlet opening facing downwards. If the safety valve is not checked
regularly, the water tank might be damaged. It is quite normal that the safety valve lets out small amounts of
water when the water tank is being charged, especially if a lot of hot water was used previously.
The safety valves can be checked by turning the cap a quarter of a turn clockwise until the valve lets out some
water through the overflow pipe. If a safety valve does not work properly, it must be replaced. Contact your
installer.
The opening pressure of the safety valves is not adjustable.
6.4
In the event of leakage
In the event of leakage in the hot water pipes between the heat pump and water taps, close the shut-off valve
on the cold water inlet immediately. Then contact your installer.
User Guide
iTec Eco
AWIE01UG102
Thermia AB
22
