Water Heater, Dhp-A; Important Parameters - Danfoss DHP-H Installation And Service Instructions Manual

11 .6 Water heater, DHP-A
Danfoss DHP-A is supplied with an integrated 180 litre water heater with a tank outside the water heater that contains the anti-freeze. The
difference between DHP-A's water heater and other models is the defrost function of the outdoor unit, otherwise they are the same and
have the same functions.
Position Name
1
2
3
4
5
11 .7 Important parameters
Heat production - calculating
The indoor temperature is adjusted by changing the heat pump's heat curve, which is the control computer's tool for calculating what the
supply temperature should be for water that is sent out in the heating system. The heat curve calculates the supply temperature depend-
ing on the outdoor temperature. The lower the outdoor temperature, the higher the supply temperature. In other words, the supply tem-
perature of the water fed to the heating system will increase exponentially as the outside air temperature falls.
The heat curve will be adjusted in connection with installation. It must be adapted later on, however, to obtain a pleasant indoor tempera-
ture in any weather conditions. A correctly set heat curve reduces maintenance and saves energy.
CURVE
The control computer shows the value for CURVE by means of a graph in the display. You can set the heat curve by adjusting the CURVE value.
The CURVE value indicates the supply temperature of the water to be sent out to the heating system at an outdoor temperature of 0°C.
Value for CURVE is 40...
At outdoor temperatures colder than 0°C, supply water hotter than 40°C is sent out to the heating system and at outdoor temperatures
greater than 0°C, supply water cooler than 40°C is sent out.
0
3
4
Hot water line
5
Temperature sensors
Tank for anti-freeze
Water heater
TWS coil
Figure 52: Water heater in DHP-A .
Supply temperature
Figure 53: Graph showing the set value 40 for CURVE .
1
2
...at zero degrees
VMBMA102
Maximum supply tem-
perature
Outdoor temperature