User manual DHP-S VUGFA102
If these instructions are not followed during installation and service, Danfoss A/Sliability according to the applicable warranty is not binding. Danfoss A/S retains the right to make changes to components and specifications without prior notice. © 2010 Copyright Danfoss A/S. The Swedish language is used for the original instructions. Other languages are a translation of original instructions.
Contents 1 2 Important information......................................................................................................................... 3 1.1 Safety precautions................................................................................................................................... 4 1.2 Protection.................................................................................................................................................... 5 About your heat pump.......
1 Important information Note! 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. The system can be considered maintenance free but certain checks are necessary. Before changing the control computer’s settings, first find out what these changes mean. Contact your installer for any service work.
1.1 Safety precautions 1.1.1 Installation and maintenance DANGER! Only authorized installers may install, operate and carry out maintenance and repair work on the heat pump. DANGER! Only authorized electricians may modify the electrical installation. DANGER! DANGER TO LIFE! Only authorized refrigeration technicians may work on the refrigerant circuit. 1.1.
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 Product description The heat pump is a heating system for heating and hot water if an external water heater is installed (accessory). It has a compressor developed solely for heat pumps. The heat pump is equipped with control equipment which is presented in a graphical display. The control equipment is also prepared for monitoring via the internet. Heat enters the house via a water borne heating system.
The heat pump is, therefore, a very environmentally friendly and economical way of heating a house. 5 4 8 3 6 7 2 1 Figure 1. The principles of the heat pump The heat pump has four separate fluid circuits • Brine circuit (1) – is a fluid (brine) filled hose lowered into a lake, buried in the ground or lowered into bedrock. The brine obtains energy from the surroundings by the fluid temperature in the hose being heated a few degrees.
• Heat transfer fluid circuit (8) – is the water that transports the heat/ energy to the heating system and the hot water tank. • Hot gas circuit – is a high temperature circuit for the hot water circuit’s final heater. If the heat pump is not connected to any water heaters, the hot gas circuit does not need to be connected. The brine circuit (1) evaporates the refrigerant in the evaporator (2), using heat from lake, ground or rock. The refrigerant is turned to gas.
3 Operating instructions 3.1 Control panel 3.1.1 Function description The heat pump has an integrated control system which automatically calculates the heat demand in the house to ensure that the correct amount of heat is produced and emitted where necessary. There are many different values (parameters), which are required in order to do the calculation of the heat demand.
display always shows the set ROOM value, the operating mode and the status of the heat pump. ROOM 20°C NO HEAT DEMAND 1 OPERAT. AUTO 2 3 Figure 2. Position Display, keypad and indicator. (20°C) Description 1 The display text and symbols are only shown as examples. Certain symbols cannot be displayed at the same time. 2 Keypad: + Plus sign used to scroll up a menu or increase the values. - Minus sign used to scroll down a menu or reduce the values.
For installation and service, the SERVICE menu is used, which is opened by pressing the left button for five seconds. The SERVICE menu has a number of sub menus, see Menu information. The INFORMATION and SERVICE menus are intended for two categories of user, customers and installers. Customers may only open the INFORMATION menu with a limited number of settings. Installers have to be able to change many settings in the control settings. The SERVICE menu is therefore hidden from the customers.
3.1.2 Display The display shows information about the heat pump’s operation, status and any alarms, in text form. Operating mode and status, indicated by symbols, are also shown in the lower part which shows the heat pump’s active processes. Note! To change the display language, press the following sequence of buttons: right arrow, arrow down to bottom menu, arrow right, scroll between languages using + or -. Then select language using right arrow. 3.1.2.1 Operating modes Table 1.
Operating mode Meaning AUX. HEATER The control system only permits the auxiliary heater to be in operation. HOT WATER In this mode the heat pump only produces hot water, no heat goes to the heating system. 3.1.2.2 Symbols Table 2. Symbols shown in the display. Symbol HP 1 Meaning Indicates that the compressor is in operation. LIGHT Indicates that the auxiliary heater is in operation. The number NING indicates what additional step is activated.
3.1.2.3 Operational information Table 3. Shows information about the heat pump. Message Meaning ROOM Shows the set ROOM value. Standard value: 20°C. If the accessory room sensor is installed it shows the actual temperature and the desired indoor temperature is shown within brackets. START Indicates that there is a need for heat production and that the heat pump will start. EVU STOP Indicates that the additional function EVU is active. This means that the heat pump is off as long as EVU is active.
See the installation instructions when filling brine. Symbol explanation 1 Used when filling 2 Connected to brine circuit 1 2 Figure 4. system 3.3 Filling the brine Checking the water level in the heating system The line pressure of the installation must be checked once a month. Ensure that heating system has the necessary pressure, however, not above maximum pressure of 3 bar. You can use normal tap water when topping up the heating system.
regularly, the water tank might be damaged. It is quite normal that the safety valve lets out small amounts of water when the water tank is being charged, especially if a lot of hot water was used previously. Both safety valves can be checked by turning the cap a quarter of a turn clockwise until the valve lets out some water through the overflow pipe. If a safety valve does not work properly, it must be replaced. Contact your installer. The opening pressure of the safety valves is not adjustable. 3.
4 Menu information 4.1 INFORMATION menu Open the menu by pressing the left or right button. The menu also shows history and operating times. Menus in italics are only visible if the expansion card (accessory) is installed. Table 4. Used to change the heat pump's operating modes and to adjust the heat curve. Menu Sub menu Sub menu Sub menu Ø CANCEL Ø INFORMATION OPERAT. AUTO HEAT PUMP AUX.
Menu Sub menu Sub menu Sub menu CURVE MIN MAX TEMPERATURE OUTDOOR ROOM (if a room sensor is installed) SYSTEM SUPPLY (if buffer tank is activated) SUPPLY LINE RETURN LINE BUFFER TANK (must be activated) HOT WATER (must be activated) INTEGRAL BRINE IN BRINE OUT POOL (expansion card) COOLING SHUNT GROUP (must be activated) 2ND HEAT CIR. CURRENT (expansion card) OPERAT. TIME HEAT PUMP AUX. HEAT 1 AUX. HEAT 2 AUX.
4.1.1 Sub-menu OPERAT. Table 5. Menu selection (OFF) Used to select operating mode. Meaning Factory setting The installation is fully switched off. This mode is also used to acknowledge certain alarms. - CANCEL = starting point, no changes made. To select OFF as operating mode, press the minus sign once to scroll down one step and press the right arrow once. AUTO Automatic operation with both heat pump and auxiliary heater permitted.
4.1.2 Sub-menu HEAT CURVE Table 6. Used to change settings for the heat curve. Menu selection Meaning CURVE Calculated supply temperature at 0°C outdoor 40°C temperature. Shown as a graphic curve. The curve (for under will be limited by the set values of MIN and MAX. floor heating 30°C) (range: 22°C / 56°C) MIN Minimum permitted supply temperature, if the temperature for heat stop has been reached and the heat pump has stopped. MAX Maximum calculated setpoint value of the supply 55°C temperature.
Menu selection Meaning Factory setting TANK TEMP Displayed if buffer tank is active. Charges the buf- AUTO fer tank to the set temperature. AUTO setting (range: charges the tank to the supply line setpoint value. 30°C / 55°C) OVERCHARGE Displayed if the buffer tank is active and TANK TEMP is set to AUTO. Charges the buffer tank to supply line setpoint value + the value of OVERCHARGE. 0°C (range: 0°C / 5°C) ROOM FAC- Only displayed if an accessory Room temperature 2 sensor is installed.
4.1.3 Sub menu HEAT CURVE 2 Only appears if shunt group sensor is connected and activated in menu SERVICE -> INSTALLATION -> SYSTEM -> SHUNT GROUP. Table 7. 4.1.4 Used to change settings for heat curve 2. Menu selection Meaning Factory setting CURVE 2 Calculated shunt group temperature at 0°C out- 40°C door temperature. Shown as a graphic curve. The (range: curve will be limited by the set values of MIN and 22°C / 56°C) MAX.
Menu selection Meaning Factory setting SUPPLY LINE Shows the actual supply temperature. The calcu- lated supply temperature to the heating system group is within brackets. During hot water production in operating mode AUX. HEATER the value for HOT WATER STOP + 10° is shown within brackets. RETURN LINE Shows the actual return temperature. The stop temperature, MAX RETURN is within brackets. - BUFFER TANK Indicates the buffer tank temperature. - HOT WATER Shows the actual hot water temperature.
4.1.5 Sub-menu OPERAT.TIME Table 9. in hours. Used to show the operating time for each component. Time given Menu selection Meaning Factory setting HEAT PUMP Compressor operating time for both heating and hot water production. 4.1.6 AUX. HEATER Operating time of auxiliary heater. - HOT WATER - Operating time for hot water with compressor. Sub-menu LANGUAGE Table 10. Used to set the language of the menu system.
5 Troubleshooting 5.1 Alarm In event of alarm this is indicated in the display with the text ALARM and an alarm message, see following table. For alarms that are not reset automatically acknowledgement is required. Acknowledge the alarm by setting the heat pump to operating mode OFF. Message Meaning HIGH PRESSURE ERROR Tripped high pressure switch. Compressor stopped. LOW PRESSURE ERROR Tripped low pressure switch. Compressor stopped.
6 Terms and abbreviations Table 11. Terms and abbreviations Term Explanation Evaporator In the evaporator, energy is retreived from the heat source and the refrigerant passing through the evaporator turns to gas. De-superheater In the de-superheater part of the total heating output is released (approx. 15%). A higher temperature than the normal condensation temperature can found here. Integral INTEGRAL is the heating system’s energy balance.
Term Explanation Control computer The control computer controls the entire heating installation. All settings are stored and the history of the installation is registered here. The control computer’s settings can be changed via the display. Room If ROOM shows 20°C the heat curve is unaffected. If ROOM shows higher or lower, this indicates that the heat curve has been adjusted up or down to change the indoor temperature.
7 References Piping installation Date ........................................................ Company ........................................................ Name ........................................................ Tel. No. ........................................................ Electrical Installation Date ........................................................ Company ........................................................ Name ......................................................
System adjustment Tel. No. ........................................................
VUGFA102
