11.2.3
ROOM
If you wish to increase or reduce the indoor temperature, change the ROOM value. The difference between changing
the ROOM value and the CURVE value is as follows:
•
When changing the ROOM value, the angle of the curve on the system's heat curve does not change, instead the
entire heat curve is moved by 3°C for every degree change of the ROOM value. The reason that the curve is
adjusted 3°C is that an approximate 3°C increase in supply temperature is usually needed to increase the indoor
temperature 1°C.
•
When changing the CURVE value, the angle of the curve on the system's heat curve changes.
2 0
0
-2 0
2 4
4 0
5 6
2
3
1
Figure 22.
Changing the ROOM value changes the heat curve upwards or downwards.
Position
Description
1
Supply temperature (°C)
2
Maximum supply temperature
3
Outdoor temperature (°C)
The relationship of the supply temperature to the outdoor temperature will not be affected. The supply temperature
will be increased or reduced by the same number of degrees all along the heat curve. I.E. The entire heat curve rises
or drops instead of the curve gradient changing.
This method of adjusting the indoor temperatures can be used for a temporary raise or drop. For long term increases
or reductions of the indoor temperature, the heat curve should be adjusted.
11.2.4
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 is de-activated.
11.2.5
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 your home has under floor
heating.
If your house has under floor heating and parquet floors, the supply line temperature must not exceed 45°C. Otherwise
the floor might get damaged. If you have under floor heating and stone tiles, the MIN value should be 22-25°C, even
in summer when no heating is required. This is to achieve a comfortable floor temperature.
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 trimming, remember to
inform them how to carry it out correctly. Also remember that the value for HEAT STOP needs adjusting upwards for
summer heating.
38 – Installation instructions
VMIFJ102
Summary of Contents for DHP-S&DP
Page 1: ...Installation instruc tions DHP S DP VMIFJ102 ...
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