user’s manual DHP-H, DHP-L, DHP-C, DHP-A Navigate the control computer’s menus using: To increase or reduce the set values use: To adjust the room temperature: start by pressing The degree information that now appears in the display is the last desired room temperature. To increase the temperature: press To lower the temperature: press The temperature you now require is registered immediately.
VUBMA102
Table of contents 1 Important information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.1 Safety precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.2 Protection . . . . . . . . . . . . . . . . . . .
1 Important information • If the installation is not used during the winter, the heating system must be drained of water, otherwise there is a risk of frost damage to the installation. (Contact an authorized installer, see the ”References” section.) • The installation can be considered maintenance free but certain checks are necessary (see “Regular checks” section). • Before changing the control computer’s settings, first find out what these changes mean. • Contact your installer for any service work. 1.
1.2 Protection 1.2.1 Corrosion Protection Due to the risk of corrosion, avoid using different types of sprays in the vicinity of the heat pump.
2 About your heat pump 2.1 Principles of function A heat pump utilises the energy found in a natural heat source. Simply put, it obtains energy in the form of heat from a heat source. The heat pump is, therefore, a very environmentally friendly and economical way of heating a house. The heat pump has three separate fluid circuits • Heat transfer fluid circuit – is the circuit that contains the water that transports the heat/ energy to the heating system and the water heater.
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 The Danfoss heat pump is a complete heat pump installation for heating and hot water. It has the market’s first compressor developed solely for heat pumps.
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, circulation 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.
2.6 Water heater, DHP-A Danfoss DHP-A is supplied with an integrated 180 litre water heater with a defroster tank outside the water heater that contains the anti-freeze. The difference between DHP‑A’s water heater and other models is the defrost function of the outdoor unit, otherwise they are the same and have the same functions. 1 2 3 4 Position Name 1 Hot water line 2 Temperature sensor 3 Defroster tank 4 Water heater 5 TWS coil 5 Figure 2: Water heater in DHP-A. 2.
CURVE The control computer shows the value for CURVE by means of a graph in the display. You can set the heat curve by adjusting the CURVE value. The CURVE value indicated which supply temperature the heating system is to have at an outdoor temperature of 0°C. Supply temperature Maximum supply temperature Value for CURVE is 40... Outdoor temperature ...at zero degrees Figure 3: Graph showing the set value 40 for CURVE.
The most energy efficient and cost effective setting is achieved by changing the CURVE value to adjust the temperature in the house to an even and constant temperature. For a temporary increase or reduction, adjust the ROOM value instead. ROOM If you wish to increase or reduce the indoor temperature, change the ROOM value.
Supply temperature Local higher supply temperature at -5° Outdoor temperature Figure 6: The adjusted curve at -5°C You can choose to adjust the heat curve individually at three specified outdoor temperatures: -5°C, 0°C, +5°C. The supply temperature can be changed by plus/minus 5 degrees. HEATSTOP The HEATSTOP function automatically stops all production of heat when the outdoor temperature is equal to, or higher than, the value entered for heat stop.
TEMPERATURES The heat pump can display a graph showing the history of the various sensors’ temperatures and you can see how they have changed over 100 measurement points in time. The time interval between the measurement points can be adjusted between one minute and one hour, factory setting is one minute. History is available for all sensors, but only the set value is shown in the display for the room sensor. The integral value that may appear is the heating system’s energy balance.
HYSTERESIS The information below tells you how your heat pump works, there are no values that you as a customer have to set. In order to start the heat in advance during sudden changes of the heat demand, there is a value, HYSTERESIS, which controls the difference between the actual supply temperature, t1 and the calculated supply temperature, t2.
2.8 Installation principle, DHP-H, DHP-C The image shows the principles of a piping installation with all components. Supply pipe Return pipe Filler tap Safety valve, 9 bar cold water Shut-off valve and strainer Safety valve Flexible hoses Pressure gauge HW CW Exp Expansion tank HW = Hot water CW = Cold water Exp = Expansion To outlet Figure 9: Principle solution for a piping installation. Safety valve, 3 bar Bleed and expansion tank Strainer Brine in Brine out Filling kit incl.
2.9 Installation principle, DHP-L The image shows the principles of a piping installation with all components. Supply pipe Return pipe Safety valve Shut-off valve and strainer Expansion tank Flexible hoses Pressure gauge Connection to any water heaters To outlet Figure 11: Principle solution for a piping installation. Safety valve, 3 bar Strainer Bleed and expansion tank Brine in Brine out Filling kit incl. strainer Shut-off valve Figure 12: Principle solution for a brine installation.
2.10 Installation principle, DHP-A The image shows the principles of a piping installation with all components. Filler tap Return pipe Supply pipe Location of expansion tank, pressure gauge, and safety valve (1.5 bar) at pressurised brine circuit when the outdoor unit is positioned higher than the heat pump.
3 Control computer A control computer is used to automatically calculate the heat demand in the house where the heat pump is installed and to ensure that the correct amount of heat is produced and emitted where necessary. There are many different values (parameters) that must be referred to during the calculation of the heat demand. Use the control computer to set and change certain values that have to be adapted according to the house demand.
3.1 Display The display of the control computer shows information about the heat pump’s operation, status and any alarms, in text form. The status, indicated by symbols, is also shown in the lower section which shows the heat pump’s active process. Operating modes Appear with applicable heat pump operating status text. Operating mode (OFF) Meaning The installation is fully switched off.
Symbol ⃞ Meaning TANK Indicates the temperature level in the water heater. During charging, the tank is filled and filling starts at the set start temperature. A lightning symbol by the symbol indicates peak heating charging (legion function). SQUARE Either indicates that the operating pressure switch has deployed, or that the hot gas temperature has reached its maximum temperature. Symbols specific to DHP-C Displays the operating status of the heat pump using symbols.
Message Meaning LOWPRESS ERROR Alarm that indicates that the low pressure switch has deployed. MOTOR P ERROR Alarm that indicates that the motor protection has deployed. BRINEFLOW LOW Appears if the accessory flow switch is installed. Indicates that the flow in the brine system is low. SENSOR Alarm that indicates a faulty sensor. HEATPUMP START Indicates that the compressor will start within 30 seconds. The brine pump has started. HEATPUMP+ ADD.
3.2 Menus 3.2.1 Main menu INFORMATION The control computer’s main menu, INFORMATION, is opened by pressing the right or left button once. DHP-H, DHP-C, DHP-L Return INFORMATION Cursor OPERATION --HEATCURVE TEMPERATURE OPERAT.TIME Sub-menus Figure 16: The main menu INFORMATION for DHP-H, DHP-C and DHP-L with sub menus. DHP-A Return INFORMATION Cursor OPERATION --HEATCURVE TEMPERATURE OPERAT.TIME DEFROST Sub-menus Figure 17: The main menu INFORMATION for DHP-A with sub menus.
3.2.2 Sub-menu OPERATION In the OPERATION menu you can set the operating mode of the heat pump. When changing operating mode, confirm your choice by pressing the right button once. The asterisk moves to the selected operating mode. For further information, see the ”Setting operating mode” section. Menu text (OFF) OPERATION AUTO HEATPUMP ADD. HEAT HOT WATER * Description Adjusted by: The installation is fully switched off. By the customer, if necessary.
3.2.3 Sub-menu HEATCURVE In the HEATCURVE menu the settings that affect the indoor temperature are made. For further information, see the ”About your heat pump” section. HEATCURVE CURVE MIN MAX CURVE 5 CURVE 0 CURVE -5 HEATSTOP Menu text Description Adjusted by: CURVE The set value indicates the supply line temperature of the water that is transported to the heating system at an outdoor temperature of 0°C. By the customer, if necessary. MIN Sets the lowest permitted supply temperature.
3.2.4 Sub-menu TEMPERATURE In the TEMPERATURE menu you are able to view the various temperatures that the installation has had. All temperatures are stored 100 minutes (factory setting) back in time so that they can also be displayed in the form of graphs.
3.2.5 Sub menu OPERAT. TIME, DHP-H, DHP‑L, DHP-C OPERAT.TIME In the OPERAT.TIME menu you are able to view the operating time of the installation. Operating times cannot be reset but are accumulated during the service life of the heat pump. The control computer calculates the operating time in minutes but only complete hours are shown in the display. HEATPUMP ADD. HEAT 1 ADD.
3.2.6 Sub-menu OPERAT.TIME, DHP-A This menu is specific to DHP-A. In the OPERAT.TIME menu you are able to view the operating time of the installation. Operating times cannot be reset but are accumulated during the service life of the heat pump. The control computer calculates the operating time in minutes but only complete hours are shown in the display. OPERAT.TIME HEATPUMP ADD. HEAT 1 ADD. HEAT 2 ADD.
3.2.7 Sub-menu DEFROST, DHP-A This menu is specific to DHP-A. In the “DEFROST” menu it is possible to view miscellaneous information about the defrost and also possible to make adjustments. DEFROST DEFROSTS BETW. 2 DEFR TIME SINCE DEFROST FAN H OFF AT DEFROST CURVE MANUEL DEFR Menu text Description DEFROSTS Total number of defrosts carried out since Not adjustable installation, that is, the number not reset. BETW.
4 Trimming the heating system To obtain a heating system balance and obtain an even and comfortable indoor temperature, you must adjust your heating system according to the example below. ⚠ Adjust the heating system during the winter to obtain the greatest possible output. ⚠ 1 2 3 4 5 6 7 8 9 Trimming must be carried out over a few days as the inertia in the heating system causes the indoor temperature to change slowly.
5 Instructions An authorized installer carries out the basic settings of the heat pump at installation.
4 Open your selection by pressing the right button once. 5 Raise or reduce the value with the up or down buttons. The graph shows how the curve slope changes. 6 Press the left button three times to exit the menu. 5.4 Adjusting a specific part of the heat curve To change a specified part of the heat curve: 1 Press either the right or left button once to open the INFORMATION main menu. The cursor is in the OPERATION menu option. 2 Press the down button to move the cursor to the HEATCURVE menu option.
5.7 Reading off temperatures Reading the hot water temperature. 1 Press either the right or left button once to open the INFORMATION main menu. The cursor is in the OPERATION menu option. 2 Press the down button to move the cursor to the TEMPERATURE menu option. 3 Open your selection by pressing the right button once. 4 Press the down button to move the cursor to HOTWATER. The value shown at the HOTWATER menu option is the hot water’s current value.
5.8 Calculating energy consumption, DHP-H, DHP-L, DHP-C The energy consumption calculation is difficult to specify exactly, but the average output for a normal house with normal hot water consumption in the following tables gives a relatively accurate result for each heat pump and heating system. Remember that the operating time for the heat pump installation must exceed one year before the specified values in the table are valid.
5.9 Calculating energy consumption, DHP-A The energy consumption calculation is difficult to specify exactly, but the average output for a normal house with normal hot water consumption in the following tables gives a relatively accurate result for each heat pump and heating system. Remember that the operating time for the heat pump installation must exceed one year before the specified values in the table are valid. The energy consumption for legion operation is included in the hours for ADD.HEAT 1.
6 Regular checks 6.1 Checking operation During normal operation, the alarm indicator lights green continuously to show that everything is OK. When the alarm is triggered, it flashes green at the same time as a text message is shown in the display. ALARM LOWPRESS ERROR Figure 18: Flashing alarm indicator in the event of an alarm. Regularly check the alarm indicator to ensure that the installation is working correctly.
6.2 Checking the brine level The brine circuit must be filled with the correct amount of fluid otherwise the installation may become damaged. The brine must be topped up when the level drops so that it is no longer visible in the expansion tank. Level too low Level correct Figure 19: Level in expansion tank. During the first month of operation the brine level might drop a little, which is quite normal. The fluid level may also vary depending on the temperature of the heat source.
6.4 Checking the safety valve Both the safety valves for the heating system must be checked at least four times a year to prevent lime deposits clogging the mechanism. See the ”Installation principle” section for information on where the safety valves are located. The safety valve of the water tank protects the enclosed heater against over pressure in the water tank. It is mounted on the cold water inlet line, its outlet opening facing downwards.
5 6 7 8 9 10 Rinse the strainer. Reinstall the strainer. Check that the o-ring on the cover is not damaged. Screw the cover back into place. Turn the shut-off valve to the open position. Start the heat pump. 6.7 ⚠ ⚠ Cleaning the strainer for the brine circuit The heat pump must be switched off at the main switch before cleaning can be started. The brine circuit’s strainer must be cleaned twice a year after installation.
7 Accessories 7.1 Room temperature sensor The room temperature sensor is an accessory that is installed in the house in a location where the temperature does not deviate greatly. It is used to set the desired indoor temperature. In the room temperature sensor there is a sensor that provides a further value that the control computer can use when calculating the heat demand. In the normal mode, the room temperature sensor’s display shows the actual indoor temperature.
8 Troubleshooting 8.1 Alarm In the event of an error message try restarting the installation using the installation’s safety switch. If restarting the heat pump does not help try rectifying the problem using the table below. Contact your installer (see ”References”) if you are unable to rectify the problem yourself. Message Meaning Cause Remedy LOWPRESS ERROR LOWPRESS ERROR - The compressor stops and there is no hot water production. Not enough fluid in the brine system. Air in the brine system.
Message Meaning Cause Remedy SENSOR HOT WATER Fault in the hot water sensor. No hot water production. Electrical fault. Contact your installer. ALARM ROOM SENSOR The actual room temperature is not displayed. To calculate the supply temperature’s desired value, use 20°C instead. Electrical fault. Contact your installer. ERR PHASE SEQ. The compressor in the heat pump is operating in the wrong direction and this means that only the auxiliary heater is maintaining heating.
9 Terms and abbreviations Term Explanation Evaporator In the evaporator, energy from the heat source is absorbed by the refrigerant passing through the evaporator. The refrigerant turns into gas. (See the ”About your heat pump” section for further information). INTEGRAL INTEGRAL is the heating system’s energy balance. Heat generation is controlled by a calculated requirement. This value is determined by comparing the actual supply temperature with its calculated supply temperature.
Term Explanation ROOM If ROOM shows 20°C the heat curve is not affected. If ROOM shows higher or lower, this indicates that the heat curve has been adjusted up or down to change the indoor temperature. Heat transfer fluid circuit The fluid circuit obtains heat/energy from the refrigerant circuit, which it then transports to the water tank or heating system. See the ”About your heat pump” section for further information.
10 Default settings in the control computer The first column in the table below shows the parameters that can be adjusted by the User. The second column shows settings made at the factory, and the third column the settings made by the installation contractor in connection with installation of the heat pump. Make sure that the installation contractor enters any settings made during installation that are particular to your heat pump. This will make it easier for you when you make your own adjustments.
10 References Installation and commissioning have been carried out by: Piping installation Date: Company: Name: Telephone no.: Electrical Installation Date: Company: Name: Telephone no.: System adjustment Date: Company: Name: Telephone no.
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