Danfoss DHP-H Installation And Service Instructions

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VMBMA602
1 Heat pump unit
• Scrollcompressor
• Stainlesssteelheatexchangers
• Circulationpumpsforbrineandheatingsystems
• Valvesandsafetyequipmentforcoolingsystemsandcorrespondingelectricalcomponents.
2 Water heater
• 180litres
• Internalanti-corrosionprotectionwithcopperorstainlesssteel
• Ithasananodethatdoesnotrequirereplacing,whichmeansthatitismaintenance-free
3 Exchange valve
• Theheatedwatereitherpassesthroughtotheheatingsystemortothewaterheaterdependingon
whether heating or hot water is to be produced
4 Auxiliary heat
• 9kWelectricheatingelement(4.5kWat230V1Nheatpumpinstallation)
• Electricheatingelementcontrolinmaximumofthreesteps(fivestepsfor400V3NDHP-A,-ALmod-
els)
• Installedontheheatingsystem’ssupplyline
• Coversthedemandofextraenergyiftheheatpump’scapacityisexceeded
• AutomaticallyconnectedifoperatingmodeAUTOisselected.
5 Control equipment
• Controlcomputerwithgraphicdisplay
• Temperaturesensors(outdoor,supplyline,returnline,brineandhotwater)
• Roomsensor(option)
The control equipment controls the heat pup unit’s included components (compressor, circulation pumps,
auxiliary heaters and exchange valve) and determines when to start and stop the pump as well as produc-
ing heat for the house or hot water.
12.3 Outdoor unit and defroster function, DHP-A, -AL models
The DHP-A and DHP-AL heat pumps are equipped with an outdoor unit that makes use of the energy in the air outdoors down to -20°C.
The outdoor unit has a coil where brine recovers free energy from the outside air. It also has a fan that increases the airflow through the
coil. During operation the coil is cooled by the energy exchange at the same time as the humidity causes it to become covered in frost.
DHP-A, AL models have an automatic function to defrost the coil using the produced heat energy. If necessary, a defrosting sequence starts
which means the following:
• Thedefrostingsequencestartswhenthetemperatureofthebrinereachesitssetparameterfordefrosting.
• Thecompressorisstoppedsothatthedefrostingsequenceshouldnotloadthecompressorunnecessarily.Ontheotherhandthecom-
pressor is not stopped when it produces hot water because the water heater is cooled when defrosting. The fan on the outdoor unit is
stopped in conjunction with defrosting to shorten the time of defrosting.
• Theshuntvalveintheheatpumpopenssothathotbrinefromthedefrostingtankismixedwiththecoldbrinecirculatingtotheout-
door unit. The mixture has a temperature of about 15°C.
• Thefifteendegreeheatedbrinemeltsthefrostontheoutsideofthecoilatthesametimeastheliquidiscooled.
• Whenthebrineisnolongercooledtotemperaturesbelow11°Cthecoilissufficientlydefrosted.
• Theshuntvalveclosestheflowofhotbrinefromthedefrostingtank.
• Operationreturnstonormal.
A DHP-A, -AL installation consists of three basic
units:
1 Heat pump unit
• Scrollcompressor
• Stainlesssteelheatexchanger
• Circulationpumpsforbrineandheatingsys-
tems
• Valvesandsafetyequipmentforcoolingsys-
tems
and corresponding electrical components.
2 Water heater
• 180litres
• Internalanti-corrosionprotectionwithcop-
per or stainless steel
• Ithasananodethatdoesnotrequirereplac-
ing, which means that it is maintenance-free
• Defrostingtankcontainingheatedbrinefor
defrosting the outdoor unit
3 Outdoor unit
• Heatexchanger
• Fan
Heat pump components. Figure 79:
1
4
3
5
2
2
1
3
DHP-AL components.Figure 80:

Danfoss DHP-H Specifications

General

Brand	Danfoss
Model	DHP-H
Category	Heat Pump
Language	English