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3
Operating instructions
See separate manual for the control system.
3.1
Checking the coolant circuit pressure
The brine circuit must be filled with the correct amount of fluid otherwise the installation may become damaged.
Ensure that system has the necessary pressure, however, not above maximum pressure of 6 bar.
See the installation instructions when filling brine: Filling the coolant system.
3.2
Checking the water level in the heating system
The line pressure of the installation must be checked once a month. Ensure that heating system has the necessary pres-
sure, however, not above maximum pressure of 6 bar.
You can use normal tap water 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. (See "References" on page 12).
Do not use any additives for water treatment in the heating system's water!
3.3
Checking safety valves
Both the safety valves for the heating system 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 over 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.
Both 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 an authorized installer, see the "References" sec-
tion for further information.
The opening pressure of the safety valves is not adjustable.
3.4
In the event of leakage
In the event of leakage in the hot water pipes between the unit and water taps, close the shut-off valve on the cold
water inlet immediately. Contact your installer. See the "References" section for more information.
In the event of leakage in the brine circuit, turn off the heat pump and call your installer immediately. See the
"References" section for more information.
Used when filling
Connected to brine circuit
VUIFK102
7
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