A Class Air Source Heat Pump A8M / A12M / A16M Installation Manual IMPORTANT – THESE ORIGINAL INSTRUCTIONS MUST BE LEFT WITH THE USER AFTER INSTALLATION, INCLUDING THE HAND-OVER FORM AT THE BACK, WHERE THE INSTALLER SHOULD RECORD KEY INFORMATION DURING COMMISSIONING. DOCUMENT IS PROHIBITED. UNAUTHORISED REPRODUCTION OF THIS 8/60472/0 Issue 1.
Table of Contents Overview - Air to Water Heat Pump 1 1 Introduction 5 1.1 Scope of Delivery 5 1.2 Safety Warnings 6 1.2.1 Handling and Transport 6 1.2.2 General 6 1.2.3 Safety 6 1.2.4 Maintenance 7 1.2.5 Electrical Warnings 7 1.2.6 Intended Use 7 1.2.7 Legal 8 1.2.8 Connection to the Grid - Notifying the DNO (Distribution Network Operator) 8 1.2.9 Heat Pump Sizing 8 2 Preparation 9 2.1 Site Selection 9 2.1.1 Location of Heat Pump 9 2.1.2 Location of Indoor Components 9 2.
Table of Contents 4.3 4.2.2 Temperature Check 24 4.2.3 Electrical Connections (SH) 25 4.2.4 Water Flow Check 25 4.2.5 DHW Setup 26 4.2.6 Electrical Connections (DHW) 26 4.2.7 DHW Test 27 4.2.8 Disinfection (Thermal) 29 4.2.9 Weather Compensation 29 4.2.10 Heating Curves 29 4.2.11 Comfort Level 30 Additional Installer Menu Options 31 4.3.1 Message Log 31 4.3.2 Output Tests 31 4.3.3 Defrost 32 4.3.4 Operating Data 32 4.3.5 History 32 4.3.
Overview - Air to Water Heat Pump Figure 1(a): Connection and label locations and details Model A B C A8M 1260mm 400mm 930mm A12M / A16M 1571mm 400mm 930mm Volume of 8kW Heat Pump = 0.47m3 Volume of 12/16kW Heat Pump = 0.
Pack 1 - Space Heating and Dimplex A-Class Cylinder A Class Heat pump A8M / A12M / A16M Hydraulics Kit A which includes: ACCHYPK User interface (UI) 1754600 Pump - UPM GEO 25-85 180 (1500mm cable) 1755740 2 x Circulation Pump Gate Valve 11/2 "swivel to 28mm comp 1756090 2 x Washer 30.1x21x2mm ERES straight Spring loaded by-pass valve 1755780 (22mm comp fitting) 3 port diverting valve (28mm comp.
Pack 2 - Space Heating and Dimplex A-Class Cylinder A Class Heat pump A8M / A12M / A16M Hydraulics Kit A which includes: ACCHYPK User interface (UI) 1754600 Pump - UPM GEO 25-85 180 (1500mm cable) 1755740 2 x Circulation Pump Gate Valve 11/2 "swivel to 28mm comp 1756090 2 x Washer 30.1x21x2mm ERES straight Spring loaded by-pass valve 1755780 (22mm comp fitting) 3 port diverting valve (28mm comp.
Pack 3 - Space Heating Only A Class Heat pump A8M / A12M / A16M Hydraulics Kit B which includes: ACCHYPK User interface (UI) 1754600 Pump - UPM GEO 25-85 180 (1500mm cable) 1755740 2 x Circulation Pump Gate Valve 11/2 "swivel to 28mm comp 1756090 2 x Washer 30.1x21x2mm 3 port diverting valve (28mm comp.
1 Introduction Thank you for choosing a Dimplex Heat Pump. The Dimplex A-Class heat pump provides outstanding performance to maximise year-round efficiency, regardless of the weather conditions. It can deliver high output and high temperatures even at low outside air temperatures of -7°C. The sophisticated controller makes the system easy to use and there are many more technological innovations including a scroll compressor that uses enhanced vapour injection. 1.
1.2 Safety Warnings 1.2.1 HANDLING AND TRANSPORT • When transporting, moving and installing the heat pump, ensure that it is not tilted by more than 45° (in any direction), for any prolonged period of time (see figure 2). Ma Ma 5° x. 4 x. 4 5° Tilt Angle Figure 2: Allowable tilt angle during handling • Do not attempt to lift the heat pump manually, as it weighs 110-130kg and should only be lifted using the appropriate lifting devices.
1.2.4 MAINTENANCE • If the heat pump may be disconnected from the power supply for prolonged periods of time, or where power supplies are susceptible to failure, antifreeze must be added to the system (e.g. mono ethylene glycol at 25% volume to protect down to -14°C). • Never use cleaning agents containing sand, soda, acid or chloride as these can damage surfaces/components.
1.2.6 INTENDED USE This product is designed to extract heat from outside air to provide energy for a water-based heating system, and is intended for domestic and light commercial use. Any other use beyond that intended by the manufacturer is prohibited. This requires the user to abide by the manufacturer’s product information. Please refrain from tampering with or altering the device. 1.2.
2 Preparation 2.1 Site Selection 2.1.1 LOCATION OF HEAT PUMP • The heat pump must be installed outdoors with adequate clearances for ventilation and maintenance. It is recommended that the heat pump is installed along the property wall, as shown in figure 3. • There must be a minimum distance of 1m in front of the fan to prevent air re-circulation.
Figure 3: Suggested heat pump layout and minimum access and air flow clearance dimensions (in mm) 2.1.3 HEAT PUMP PLACEMENT AND FIXING • Approximately 2 litres of condensate water are drained from the system every time a defrost cycle occurs (approximately once every hour in cold and humid weather). Therefore, it is essential that the condensate pipe is fed into a drain or soak away to allow for safe disposal of the excess water, away from footpaths or patios.
• The positions of the fixing holes can be located by placing the heat pump on the plinth with the condensate pipe aligned, and marking the holes. Move or slide the heat pump to drill holes. • Ideally the heat pump should be located close to the property. Positioning of the heat pump away from the property will result in the need for extra insulated pipe, which will lead to extra cost, and result in additional heat losses.
3 Installation 3.1 Plumbing Information 3.1.1 PIPE SIZING INFORMATION When selecting piping to install with the heat pump please ensure that: • The pipe sizes are adequate to allow the correct nominal water flow rate through the heat pump. • The safety group and expansion vessel (space heating side) are accurately sized by the installer based on the system volume (these are not supplied by Dimplex).
NOTE: NOT ALL TYPES OF PIPE WILL HAVE THE SAME INTERNAL DIAMETER, E.G. MULTI-LAYERED/PLASTIC PIPES WILL HAVE A THICKER WALL SO THE GUIDELINES SET OUT IN TABLE 1 WILL NOT APPLY. MICROBORE (8mm) AND 15mm PIPE IS NOT SUITABLE. AS A RULE OF THUMB, THE EQUIVALENT STRAIGHT LENGTH (L [mm]) OF EACH ELBOW IS FOUND BY MULTIPLYING THE (D [mm]) BY 30, E.G. 4 ELBOWS OF DIAMETER 22mm PIPE IS EQUIVALENT TO 2.5m OF 22mm PIPE. OUTER DIAMETER OF THE PIPE NOTE: TABLE 1 ABOVE IS PROVIDED AS A GUIDELINE WHEN USING WATER ONLY.
3.2 Plumbing - Installation • The system must be filled and flushed with clean fresh water to ensure the removal of all the air from the installation. Air bleed points must be installed at the highest point in the system; in particular, the installer must remember to install an air bleed on the heat pump pipe if it is a local high point since there is no air bleed point on the heat pump itself. Dimplex recommend the use of a power flush and purge cart to facilitate this process.
15 Figure 5: Wiring centre electrical configurations - with non A Class cylinder / no cylinder
16 Figure 6: Wiring centre electrical configurations - with A Class cylinder
Warnings • Before opening the heat pump, ensure all circuits are isolated. • Ensure that the components in the electrical box do not get wet when the electrical box is opened. • The main 230V power cable must be supplied via a suitable sized exterior isolator, lockable in the OFF position. Figure 7: Opening the casing to fit electrical connections 3.3.1 ACCESS TO ELECTRICAL CONNECTIONS - OPENING THE HEAT PUMP To open the heat pump, follow the procedure shown in figure 7; 1.
Mains power supply cable to be connected to Figure 8: Heat pump electrical connections NOTE: ‘S’ AS SHOWN IN FIGURE 8 ABOVE IS THE EARTH SHIELD AND MUST BE CONNECTED DURING INSTALLATION. NOTE: ENSURE THAT CABLE ACCESS COVERS ARE CLOSED CORRECTLY WHEN NOT IN USE. NOTE: FOLLOW STEPS IN REVERSE ORDER TO CLOSE THE HEAT PUMP. W HEN CLOSING THE HEAT PUMP FRONT PANEL, ENSURE THAT THE TOP AND BOTTOM PANELS ARE INTERLOCKED. 3.3.
Figure 9(a): Heat pump electrical connections - configuration 1 Figure 9(b): Heat pump electrical connections - configuration 2 19
3.3.3 MODBUS CABLE INFORMATION Belden Cable 9842 Typical Equivalent Cable Nominal Characteristic Impedance 120Ω 120Ω Nominal Conductor DC Resistance 24.0Ω /1000ft 78.80 Ω/km* 78.7401 Ω/km* 12.8pF/ft Nominal Capacitance Core to Core 42pF/m 41.99pF/m *Conversion factor for ft to m = 3.28 ft = 1m 1km of Belden cable would have a resistance of 78.74 Ω/km 1km of Equivalent cable has a resistance of 78.8 Ω/km Table 2: Recommended cable specifications/electrical characteristics for Modbus cable 3.3.
4 Heat Pump Controller / Commissioning 4.1 Set To Work When starting up the heat pump you must first ensure that; • All covers are replaced. • The heat pump isolator switch is switched on. • The heat pump is connected to the mains power supply via a separate suitable circuit breaker and RCD protection. • The wiring centre or DHW cylinder is connected to the mains power supply. • The Modbus network is complete and the UI and the heat pump are connected to the wiring centre or DHW cylinder.
DHW MENU ICON Access to domestic hot water menu (shows current DHW temperature) SPACE HEATING ICON Access to space heating menu (shows current indoor and outside temperatures) TEMPORARY MODES Access to temporary modes menu INFORMATION MENU Figure 13: Home screen Access to information menu 4.1.2 BIVALENT MODE (ALTERNATIVE BACK-UP HEAT SOURCES) If the heat pump cannot meet the heating load (if it is undersized for extreme conditions), the system must call on an alternative, back-up heat source.
When using the Login function, input the installer access code (22 - Installer) by turning the dial to scroll through numbers, then pressing in the dial to select as before. You will then need to input 55 (commissioning menu code) to bring up the installer menu. When you enter the installer menu, select the Language Selection option, which will bring you to the Start Guide screen. Selecting UK will bring you back to the Installer Menu, which will now display the Commissioning option.
4.2.1 W ATERSIDE CHECK The ‘Waterside Check’ menu allows you to select whether temperature control is based on the flow or return temperature. This will apply to heating curves, as discussed in section 4.2.10. It is generally always recommended to set the temperature control based on the return temperature, unless it is absolutely necessary to use flow temperature instead for a particular set up, as flow control may lead to unnecessary stopping and starting of the heat pump.
4.2.3 ELECTRICAL CONNECTIONS (SH) This menu provides a list of electrical connections that should be made prior to commissioning for space heating. The list is based on the schematic zone diagram selected and also the type of temperature devices that will be used in each zone. Once you have confirmed all checks and select ‘Next’, you will return to the commissioning menu where you can now access the ‘Water flow check’ menu. Figure 19: Temperature Check Figure 20: Electrical Connection 4.2.
If carrying out start up in cold weather, commission the heat pump heating only the buffer. Once it reaches the required temperature open each zone slowly and in series, especially for under floor heating. If you have selected Schematic 1 or 3 (Space heating only or Bivalent space heating), move now to section 4.2.10 ‘Heating Curves’ to complete the commissioning process.
Figure 23: DHW Set-up menu Figure 24: electrical connections Figure 25: Valve Check screen 4.2.7 DHW TEST Before you run the DHW test, which consists of heating up the cylinder to maximum temperature from the heat pump, you will be asked to check that the valve (figure 26) is in the DHW position (A position), as shown on the screen in figure 25. Check that the red actuator marker changes to the correct position (the default position is B).
NOTE: DURING THE DHW TEST, THE DEFROST FUNCTION WILL BE DISABLED. IF THE COIL STARTS FROSTING DUE TO EXTERNAL CONDITIONS, IT IS POSSIBLE TO POSTPONE THE DHW TEST BY SELECTING ‘FINISH’ ON THE DHW TEST SCREEN (SEE FIGURE 27(A)) WHILE THE TEST IS RUNNING. IF THE TEST IS POSTPONED, THE DHW CAN STILL BE USED. NOTE: SELECTING ‘STOP TEST’ WILL CANCEL THE TEST COMPLETELY.
4.2.9 WEATHER COMPENSATION The biggest factor in defining the heat demand required for a building is typically the weather. Which affects the required heat load for a building. Weather compensation works by adjusting the set point temperature of the heating system to reflect changes in the outside (external) temperature, allowing the heat pump to operate more efficiently. Weather compensation is determined by the heat curve settings for the system.
COMFORT LEVEL For end-users, the preferred method of modifying the heating system comfort level is by using the comfort level function rather than modifying the heat curve. Here, it is possible to raise or lower the water input temperature within a range of 9°C (-3 to +6) by accessing the comfort level. For more information please see the A-Class User Manual.
4.3 Additional Installer Menu Options Once the commissioning process has been completed, additional menus will be available to the installer, as outlined in this section. 4.3.1 MESSAGE LOG The message log menu provides a list of all errors that have taken place, including the date and time when they occurred. Selecting an individual error code will provide more information on the type of error that occurred if an SD card is present. Active error messages will show a ticked box.
4.3.3 DEFROST Before running a manual defrost cycle you must ensure the buffer has been isolated from the heating, as stated by the message on the UI. Selecting ‘Start Defrost’ begins the defrost cycle. The defrost screen will state the time remaining in the defrost cycle. A heating water return temperature of ≥18°C is required for proper defrosting of the evaporator.
5 System Health Check/Maintenance These are checks that should be carried out regularly to ensure that your Dimplex product performs at its best. Heat pump: Is the fan grille clear from debris? - Visual check Is the tray clear from debris and water flowing freely? - Visual check Is the condensate drain clear from debris? Is the evaporator coil clean and free from damage? E.g.
Appendices • A - Technical Specifications • B - Refrigeration Cycle diagram • C - Schematic Zone Diagrams - Legend • D - Schematics 1, 2, 3 & 4 : Space Heating Only • E - Schematics 5, 6, 7 & 8 : Zone Space Heating & Domestic Hot Water • F - Schematics 9, 10, 11 & 12 : Bivalent Space Heating • G - Schematics 13, 14, 15 & 16 : Bivalent Zone Space Heating & Domestic Hot Water • H - Wiring Centre Electrical Connections - with A-Class Cylinder • I - Jumper Information for Alternative Wiring Con
APPENDIX A: Technical Specifications – A Class Air-to-Water Heat Pump TECHNICAL SPECIFICATIONS 1 TYPE AND ORDER CODE 2 DESIGN 2.1 Degree of protection according to EN 029 for compact unit or heating element 2.2 Installation Location 3 PERFORMANCE DATA 3.1 3.
APPENDIX B - Refrigeration Cycle 36
APPENDIX C - Schematic Zone diagrams - Legend No. on UI Code Hea ng type No. of Zones DHW Appendix No.
APPENDIX D - Schematics 1, 2, 3 & 4 - Space Heating Only 38
APPENDIX E - Schematics 5, 6, 7 & 8 - Zone space heating & DHW 39
APPENDIX F - Schematics 9, 10, 11 & 12 - Bivalent Space Heating 40
APPENDIX G - Schematics 13, 14, 15 & 16 - Bivalent zone Space Heating & DHW 41
APPENDIX H - Wiring centre electrical connections – with A Class cylinder 42
APPENDIX I - Jumper Information for Alternative Wiring Configuration Start End Alternative Modbus network configuration Locations of jumpers that should be in the ON/OFF position for the recommended configuration Jumper in ON position on SEC board Jumper in the OFF position on water module 43 Jumper in the ON position on user interface (UI)
APPENDIX J - Controller cable connections 44
APPENDIX K - Installer Menu Flow Chart Language Selec7on Commissioning General/Schema7c Waterside Checks Message List History Electrical Connec7ons (Space Hea7ng Only) Opera7ng Data Waterflow Checks DHW Setup Electrical Connec7ons (DHW) DHW Test Disinfec7on Hea7ng Curves Zone Selec7on Hea7ng Circuit Type Setup Complete ON/Automa7c 45 Input/Output Tests
Installer Hand-Over Form Installer Name & Address: Installer Contact Phone Number; Installer Contact Email Address: MCS Installer Number: Date of Installation / Commissioning: Heat Pump Model: HP Serial Number (from nameplate): Cylinder Model / Serial Number: Accessories Installed: Schematic number used for commissioning: Details of Zone Control and Heat Emitters Installed: Any other relevant information: Note: this installation manual needs to be left with the end user.
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