Danfoss – 24
VUBMF102
4
Trimming the heating system
To obtain a heating system balance and obtain an even and comfortable indoor tempera-
ture, you must adjust your heating system according to the example below.
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Adjust the heating system during the winter to obtain the greatest possible output.
Trimming must be carried out over a few days as the inertia in the heating system
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causes the indoor temperature to change slowly.
1 Choose one of the house’s rooms as a reference room for the indoor temperature, where
the highest temperature is required, 20-21°C.
2 Place a thermometer in the room.
3 Open all the heating system’s radiator valves fully.
4 Leave the heat pump’s ROOM value set at 20°C. See the “Instructions – Setting the ROOM
value” section for further information.
5 Note the temperature in the reference room at different points in time over a 24 hour
period.
6 Adjust the ROOM value so that the reference room reaches your desired indoor tempera-
ture of 20-21°C. Remember that other rooms will have different temperatures during
trimming, but these can be adjusted later.
7 If the ROOM value must be adjusted more than 3°C upwards or downwards the CURVE
value must be adjusted instead. See the “Instructions – Adjusting the CURVE value” sec-
tion for further information.
8 If the indoor temperature varies several degrees despite trimming, a specific part of
the heat curve may need adjusting. .Check at what outdoor temperature the variation
is greatest and adjust the curve at the corresponding value (CURVE 5, CURVE 0, CURVE
-5). See the “Instructions – Adjusting a specific part of the heat curve” section for further
information.
9 When the reference room has an even temperature of 20-21°C over a 24 hour period, you
can adjust the radiator valves in the other rooms so that their indoor temperatures are
the same temperature or lower than the reference room.
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