Figure 4. The adjusted curve at -5°C
Position Description
1 Supply temperature (°C)
2 Outdoor temperature (°C)
3 Local higher supply temperature at -5°C
8.5.5 HEAT STOP
The HEAT STOP function automatically stops all production of radiator heat when the outdoor temperature is
equal to, or higher than, the value entered for heat stop.
When the heat stop function is activated, the circulation pump will be turned off - except when hot water is being
produced. The circulation pump will be "exercised" for one minute per day. The factory set value for activating
heat stop is an outdoor temperature of 17°C. If the heat stop function is active, the outdoor temperature must
drop 3°C when setting, before the heat stop stops.
8.5.6 MIN and MAX
The MIN and MAX values are the lowest, respectively highest set point values that are allowed for the supply tem-
perature.
Adjusting the minimum and maximum supply temperatures is particularly important if under floor heating is used.
Note! MIN and MAX temperatures do not limit the actual temperature on the supply line.
Caution! For under floor heating under a parquet floor or stone floor, too high a supply temperature can
damage the floor.
If your house has a basement, the MIN value should be adjusted to a suitable temperature for the basement in
summer. A condition for maintaining the heat in the basement in the summer is that all radiators have thermostat
valves that switch off the heat in the rest of the house. It is extremely important that the heating system and the
radiator valves are trimmed correctly. As it is usually the end customers themselves who have to carry out trim-
ming, remember to inform them how to carry it out correctly. Also remember that the value for HEAT STOP needs
adjusting upwards for summer heating.
8.5.7 TEMPERATURES
The heat pump can show a graph of the history of the temperatures of the different sensors. The graph shows how
the temperature has changed during the last 60 measurement points. The time interval between the measure-
ment points can be adjusted between one minute and one hour, factory setting is one minute.
History is available for all sensors, but only the set value is shown in the display for the room sensor. The integral
value that may appear is the heating system’s energy balance.
42 – Installation instructions VMGFD102
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