Danfoss DHP-AT Installation And Service Instructions Manual
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Summary of Contents for Danfoss DHP-AT
- Page 1 Installation and service instructions DHP-AT VMGFI202...
- Page 2 If these instructions are not followed during installation and service, Danfoss A/S liability according to the applicable war- ranty is not binding. Danfoss A/S retains the right to make changes to components and specifications without prior notice. © 2011 Copyright Danfoss A/S.
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Page 3: Table Of Contents
Contents About documents and decals ............. 3 Introduction ..................3 Symbols in documents ..............3 Symbols on decals ................ 3 Terminology ..................4 Important information ..............5 General safety precautions ............5 Refrigerant ..................5 Electrical connection ..............6 Water quality ................... 6 Commissioning ................ -
Page 5: About Documents And Decals
About documents and decals Introduction The following information is available for this product: • Installation and service instructions containing information to install and commission a heat pump installation, information about the heat pump’s function, information about accessories, technical data, troubleshoot- ing and maintenance instructions (this document). -
Page 6: Terminology
Terminology Term Meaning Heating system/Heat transfer fluid The circuit that generates heat to the property or to the domestic hot water tank heater. circuit Supply line The heating system’s supply line with flow direction from the heat pump to radiators/ under floor heating or domestic hot water tank heater. -
Page 7: Important Information
Important information General safety precautions Warning! Risk of personal injury! Children are not permitted to play with the product. Caution! The heat pump must be installed by authorised installation engineers and the installation must follow the applicable local rules and regulations as well as these installation instructions. Caution! This product is not intended for persons (including children) with reduced physical, sensory or psychological capacity, or who do not have knowledge or experience, unless supervised or they have received instructions on how the apparatus functions from a safety qualified person. -
Page 8: Electrical Connection
Refilling must only be carried out using new refrigerant (for the amount and type of refrigerant see manufacturer’s plate) through the service valves. Caution! All warranties from Danfoss are void if, when filling with refrigerant other than Danfoss A/S specified refrigerant, if there has not been written notification that the new refrigerant is an approved replacement refrigerant together with other remedies. -
Page 9: Commissioning
Commissioning Caution! The installation may only be commissioned if the heating system is filled and all excessive air is expelled. Otherwise the circulation pump may be damaged. Installation and service instructions VMGFI202 – 7... -
Page 10: Transport, Delivery Check And Positioning
Transport, delivery check and positioning Transporting heat pump Caution! The heat pump must always be transported and stored standing and in a dry environment. If the heat pump is laid on the incorrect side it may become seriously damaged as the oil in the compressor can run out in the pressure pipe and therefore prevent normal function. - Page 11 Figure 1. Positioning heat pump Note! Avoid placing the heat pump near windows or walls to noise sensitive areas. Note! Ensure that there is sufficient distance to neighbouring properties so that they are not exposed to noise. Applicable local regulations must be followed. Note! The heat pump should not be enclosed.
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Page 12: The Heat Pump
The heat pump Dimensions and connections The dimensions and connections of the heat pump is described in the pictures and tables below. Description 6kW Height 655 mm 755 mm Width 1026 mm 1026 mm Deepth 495 mm 495 mm Figure 2. Dimensions Description Supply line... -
Page 13: Components
Components The principal components of the heat pump is shown in the picture below: Figure 4. Components, exploded view Position Explanation Position Explanation Fan mesh/front grill 4-way valve Expansion valve Front panel Water flow switch Fan motor Internal electrical heater Left grill High and Low pressure service ports Evaporator... -
Page 14: Principle Function Description
• Hot water tank electrical heater • Circulation pump • Reversing valve hot water Principle function description The heat pump can provide the following main functions: • House heating • Cooling • Domestic Hot Water (DHW) • Defrostning • Legionella prevention •... - Page 15 • During house heating: • When the air temperature is below 0°C. The system requests heating operation. The buffer tank temperature has decreased more than the value set in Menu 08 and 30 minutes after the compressor has started After another 90 minutes; If the air temperature is still below 0°C.
- Page 16 4.3.4 Defrosting The heat pump has an automatic defrosting function that will start when the the ambient air temperature is low. The heat pump will then calculate the best defrosting program depending on data collected from the temperature sensors. As an option, defrosting can also be activated manually by the user. Auto defrosting The condition for auto defrosting is that the air temperature is less than 15°C and there is no failure of the coil temperature sensor.
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Page 17: Check And Safety Functions
4.3.5 Legionella prevention There is an automatic legionella prevention when the heat pump function is set for DHW. Run at 00:00 after 7 days of operation. It will then heat up the hot water tank to 65 degrees for 15 minutes. This is repeated once a week and kills any possible legionella bacterias in the water inside the hot water tank. - Page 18 • Different ambient air temperatures • Selected heat curve • Desired room temperature setting -1 0 -1 2 -1 4 -1 6 -1 8 -2 0 Figure 5. Heat curves and heat pump working range in AUTO mode Position Explanation Initial supply line temperature (°C) Supply line water temperature (°C) Working range in AUTO mode...
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Page 19: System Solution
System solution System solution An example of a system solution with heat pump, hot water tank, and buffer tank is shown in the picture below. Figure 6. Example, system solution Position Explanation Position Explanation Heat pump Hot water Flexible hoses Temperature and pressure valve Control unit Temperature sensor... -
Page 20: Piping Installation
Piping installation Pipe connection Caution! There is a risk of the pipes to the heat pump freezing when water circulation through the heat pump stops when outdoor temperatures fall below freezing. Normally the integrated flow sensor gives an alarm if there is low flow (assumes that there is current to the heat pump), for example when the radiator pump has stopped. -
Page 21: Connecting Supply And Return Lines
Connecting supply and return lines Connect the supply line pipe (red label) with a flexible hose connection and with all the necessary compo- nents, see Flexible hoses, Page 19. Connect the return line pipe (blue label) with a flexible hose connection and with all the necessary compo- nents including a filter. - Page 22 are used for all pipe connections to avoid the transmission of vibrations. Flexible hoses are available to purchase as accessories. The figures below show how appropriate and inappropriate installations look using this type of hose. 20 – Installation and service instructions VMGFI202...
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Page 23: Electrical Installation
Electrical installation DANGER! Hazardous electrical voltage! The terminal blocks are live and can be highly dangerous due to the risk of electric shock. All power supplies must be isolated before electrical installation is started. The heat pump is connected internally at the factory, for this reason electrical installation consists mainly of the connection of the power supply. -
Page 24: Connecting Circulation Pump
Connecting circulation pump Connect the power cable between the circulation pump (4) and the heat pump (1) as shown in the picture below. 22 – Installation and service instructions VMGFI202... -
Page 25: Connecting Hot Water Tank Electrical Heater
Connecting hot water tank electrical heater Connect the power to the hot water tank electrical heater (13) according to the picture below. Installation and service instructions VMGFI202 – 23... -
Page 26: Connecting External Electrical Heater
Connecting external electrical heater Connect the cable between the heat pump (1) and the optional external electrical heater (38). Connecting hot water sensor Connect the hot water tank sensor cable (12), optional, not included in delivery, to the connector in the heat pump marked "Hot water tank sensor". -
Page 27: Connecting Reversing Valve Hot Water
Connecting reversing valve hot water Connect the cable to the reversing valve, hot water (8), according to the picture. Installation and service instructions VMGFI202 – 25... -
Page 28: Connecting The Power Supply
Connecting the power supply Warning! Follow local and national rules and regulations for the specification of the power cable. Connect the power cable between the multi-pole circuit breaker and the heat pump (1). The picture below shows alternative connections. Figure 7. Connection alternatives 26 –... -
Page 29: Operator Panel
Operator panel The heat system is controlled by an operator panel with a display that shows operational information A keypad is used for user interaction, that is selecting functions, navigating the menu system, and for parame- ter settings. When the heat pump is turned on, the display shows the operational mode and the water tempera- tures. -
Page 30: Commissioning
Commissioning Note! Read the safety instructions! Before filling water in the heating system or turning on the power, the installation must be checked for safety and functional capability. Checking piping installation and heating system Pipe connections in accordance with the system solution. •... -
Page 31: Test Operation
Test Operation Caution! The installation may only be commissioned if the heating system and water heater have been filled and excessive air expelled from the pipes. Otherwise the circulation pump can be damaged. Caution! Any alarms that may occur in connection with the installation must be fault-traced. Test operate and, at the same time, check the following functions of the components in the heat system: •... -
Page 32: Customer Information
9.6.4 Trimming the heating system To obtain a heating system balance and obtain an even and comfortable indoor temperature, the heating system must be adjusted according to the example below. Note! Adjust the heating system during the winter to obtain the greatest possible output. Note! Trimming must be carried out over a few days as the inertia in the heating system causes the indoor temperature to change slowly. -
Page 33: Troubleshooting
Troubleshooting 10.1 Operational problems Operational problems can be solved by troubleshooting the following areas: • Alarms • Leakage (fluid side) • Abnormal noise in the heat pump or radiator system • Hot water • Heating • Other issues There may be more than one way of troubleshooting a cause. 10.1.1 Alarms Error... - Page 34 10.1.2 Temperature sensor locations The location of the internal temperature sensors are shown in the principal diagram below: Figure 9. Sensor locations Sensor Description Air temperature Buffer tank, see System solution, Page 1. Hot water tank, see System solution, Page 1. Exhaust gas temperature Return gas temperature Cooling coil (external sensor)
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Page 35: Technical Data
Technical data Installation and service instructions VMGFI202 – 33... -
Page 36: Connection Diagram
Connection diagram 34 – Installation and service instructions VMGFI202... -
Page 37: Wiring Diagram
Wiring diagram Installation and service instructions VMGFI202 – 35... -
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