5 Control equipment
• Control computer with graphic display
• Temperature sensors (outdoor, supply pipe, return pipe, brine in, brine out and hot
water)
• Room sensor (option)
The control equipment controls the heat pup unit’s included components (compressor, circu-
lation pumps, auxiliary heaters and exchange valve) and determines when to start and stop
the pump as well as producing heat for the house or hot water.
2.3 Auxiliary heat, DHP-H, DHP-L, DHP-C
If the heat demand is greater than the heat pump’s capacity, the auxiliary heater engages
automatically. The auxiliary heater is made up of an electric heating element on the supply
pipe that has two outputs, ADD.HEAT 1 and ADD.HEAT 2, and can be controlled in three steps:
• Step 1 = ADD.HEAT 1 = 3 kW
• Step 2 = ADD.HEAT 2 = 6 kW
• Step 3 = ADD.HEAT 1 + ADD.HEAT 2 = 9 kW
To calculate the total energy consumption, see the ”Settings- Calculating energy consump-
tion” section.
In the event of an alarm, the auxiliary heater engages automatically.
2.4 Auxiliary heat, DHP-A
The auxiliary heater is made up of an electric heating element on the supply pipe that has
three outputs, ADD.HEAT 1, ADD.HEAT 2 and ADD.HEAT 3, and can be controlled in five steps:
• Step 1 = ADD.HEAT 1 = 3 kW
• Step 2 = ADD.HEAT 2 = 6 kW
• Step 3 = ADD.HEAT 1 + ADD.HEAT 2 = 9 kW
• Step 4 = ADD.HEAT 2 + ADD.HEAT 3 = 12 kW
• Step 5 = ADD.HEAT 1 + ADD.HEAT 2 + ADD.HEAT 3 = 15 kW
To calculate the total energy consumption, see the ”Settings- Calculating energy consump-
tion” section.
In the event of an alarm, the auxiliary heater engages automatically.
2.5 Water heater, DHP-H, DHP-C
Danfoss heat pumps DHP-H, DHP-C, are supplied with an integrated 180 litre water heater.
The temperature of the hot water cannot be adjusted. Hot water production does not cease
at a determined temperature but when the operating pressure switch reaches its maximum
operating pressure, which corresponds to a hot water temperature of approximately 50-55°C.
Using a regular time interval, the water in the water heater is heated to 60°C to prevent the
build up of bacteria (legion function). The factory set time interval is seven days.
Hot water production is prioritised ahead of heat production, that is, no heat is produced if
there is a hot water demand.
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