Main Functions - Danfoss DHP-AT User Manual

User Guide
3.2

Main functions

The heat pump can provide the following functions:
▪ House heating for radiators or under-floor heating
▪ Domestic Hot Water (DHW)
▪ Cooling
▪ Defrosting in cold weather conditions
▪ Frost protection
▪ Legionella prevention
Most of these functions are automatically controlled by the control system according to the need from the
household or ambient temperatures.
Cooling must be initiated manually from the key pad by the user. The heat pump behaviour is still automatical-
ly controlled by the control system.
The default function when starting the heat pump for the first time is house heating/DHW automatic mode.
The production of hot water is prioritized. When the hot water temperature reaches the set point, the heat
pump automatically switches to house heating or cooling depending on the user settings.
The heating system is normally configured for automatic house heating/DHW at commissioning. An appropri-
ate heating curve and a desired room temperature are selected by the installer. The heat pump will adjust the
house heating water temperature in accordance with the outside air temperature. The maximum water tem-
perature for house heating is 50°C running on compressor only. If higher temperature is required, the external
electrical heater is used to reach the set point. The AUTO mode is for both comfortable house heating and en-
ergy saving.
The heating function can be set to MANUAL mode, then the heat pump will produce a constant supply line
temperature following the setting in the control system.
The picture below shows a simplified view of the recommended heating curves and the temperature working
range in AUTO mode.
Danfoss Heating Solutions
DHP-AT
VUGFC302
7