Components - Danfoss DHP-AL User Manual

2 The brine is guided into the heat pump's evaporator. The enclosed refrigerant in the
refrigerant circuit is forced to boil as the pressure in the expansion valve drops and
later evaporates to a gas in the evaporator. The energy produced during this process is
released by the heated brine.
3 The refrigerant that now contains a large quantity of energy in the form of heat is trans-
ferred to the compressor, which both increases its temperature and pressure.
4 The refrigerant then continues to the condenser. When condensing, the refrigerant
supplies its heat energy to the heat transfer fluid circuit. The refrigerant's temperature
decreases and returns to a liquid state.
5 The heat transfer fluid circuit transports the heat energy out to the water heater, radiator
or the under floor heating system, which heat up.
6 The refrigerant is then transported through the expansion valve where the pressure
drops and the refrigerant starts to boil and then the process starts again.
2 .2

Components

DHP-AL is a heat pump installation for both heating and producing domestic hot water for
the home. The heat pump uses outdoor air as a heat source and retrieves energy from the air
using an air heat exchanger in a separate outdoor unit.
The compressor in the heat pump is first compressor on the market that is specially devel-
oped for heat pumps. It also has an integrated electrical heating element which provides
auxiliary heat that can be used when the heating requirement exceeds the capacity of the
heat pump. The heat pump supplies as much of the heat demand as possible before auxiliary
heating is engaged and assists.
The heat pump is equipped with control equipment, which is controlled via a control panel.
The control equipment controls the heat pump unit's included components (compressor,
circulation pumps, auxiliary heater and outdoor unit) and determines when to start and stop
the pump as well as producing heat and cooling for the house.
Heat enters the house via a water borne heating system, a low temperature system. One is
used to cool the house. The heat pump's function for cooling connects automatically when
the outdoor temperature exceeds the set parameter.
The heat pump unit consists of five basic units:
1 Heat pump unit
• Scroll compressor
• Stainless steel heat exchanger (evaporator and condenser)
• Circulation pumps for brine and heating systems
• Valves and safety equipment and corresponding electrical components.
2 Auxiliary heat
• 15 kW electric heating element (4.5 kW at 230 V heat pump installation)
• Electric heating element control in a maximum of five steps (three steps for 230 V heat
pump installation)
• Installed on the heating system's supply pipe
• Covers the demand of extra energy if the heat pump's capacity is exceeded
• Automatically connected in the heat pump unit if operating mode AUTO is selected.
3 Control equipment (not shown in the figure)
• Control computer with graphic display
• Temperature sensors (outdoor, supply pipe, return pipe, brine and hot water)
• Room sensor (option)
Danfoss – 6 VUBMF102