WarmFlow A Series User Instructions
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WarmFlow A Series User Instructions

High efficiency variable speed air source heat pumps
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High Efficiency
Variable Speed
Air Source Heat Pumps
Models covered by this manual:
A-Series
Air Source
Incorporating:
AS01-R32
User Instructions
Installation Instructions
Service Instructions
Guarantee Terms & Conditions
AS02-R32
AS03-R32

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  • Page 1 High Efficiency Variable Speed Air Source Heat Pumps Models covered by this manual: A-Series Air Source AS01-R32 AS02-R32 AS03-R32 Incorporating: User Instructions Installation Instructions Service Instructions Guarantee Terms & Conditions...
  • Page 2 TECHNICAL, SPARES & GUARANTEE CLAIMS For technical advice about the installation, commissioning, servicing or use of this appliance, please contact the Warmflow Customer Care Centre by post, phone, fax or email at the addresses below. Please also refer to our website.

  • Page 3: Table Of Contents

    CONTENTS Contents ..................................1 USER INSTRUCTIONS ............................3 Intended Use ................................. 3 Compliances ................................. 3 Basic Operation ................................3 Product Data ................................. 4 1.4.1 Starting Current ............................. 6 Construction .................................. 7 Supplied Components ..............................7 Storage / Transport ............................... 8 USER INTERFACE ..............................
  • Page 4 3.15 Alarms ..................................55 3.16 Troubleshooting................................61 YOUR GUARANTEES, TERMS & CONDITIONS ..................... 62 Period of Guarantee ..............................62 Warmflow’s Obligations ............................... 62 Your Obligations ................................62 Exclusions of Guarantee ............................. 63 4.4.1 Repairs ..............................63 4.4.2 Other property ............................. 63 4.4.3...

  • Page 5: User Instructions

    1 USER INSTRUCTIONS 1.1 Intended Use The Warmflow Air Source Heat Pump units are intended for the production of hot water for space heating and sanitary water. The units can be used to provide heating and domestic hot water (DHW) via underfloor heating circuits, radiators and approved hot water cylinders. The units are designed to extract heat from the air.

  • Page 6: Product Data

    Heat is extracted from the air by blowing air through a finned radiator, known as the evaporator, with a fan. The extracted energy from the air is transferred into the refrigerant which circulates around the evaporator. The heat pump then converts this low grade heat to a high grade by compressing the refrigerant using the compressor.
  • Page 7 Table 2 Product information AS01- AS02- AS03- Model Air-to-water heat pump Water-to-water heat pump Brine-to-water heat pump Low-temperature heat pump Equipped with a supplementary heater Heat pump combination heater Symbol Value Unit Rated heat output Prated Declared Capacity of heating for part load at indoor temp. 20°C and outdoor temp., T (~ 55°C) = -7°C = 2°C...

  • Page 8: Starting Current

    Table 3 Product Fiche Warmflow Warmflow Warmflow Supplier AS01 AS02 AS03 Model A+++ Energy Efficiency Class Rated Heat Output (kW) Seasonal Space Heating Energy Efficiency 1838 2750 5355 Annual Energy Consumption, GCV (kWh) Sound Power Level, LWA (dB) Rated Heat Output in Colder Climate (kW)

  • Page 9: Construction

    1.5 Construction The Warmflow air source heat pumps are housed in a powder-coated galvanised metal casing complete with enclosure box in which a cable entry terminal is mounted. Top Lid Wiring Entry Points Front Grill Heating Flow & Return Feet Supports...

  • Page 10: Storage / Transport

    1.7 Storage / Transport The units come on a pallet (Dimensions of shipping sizes are shown below) and are secured to the pallet using screws. If the units are to be stored prior to installation, they must be kept indoors in storage conditions at a temperature of between 5°C and 60°C with a humidity level between 10%RH and 80%RH in order to provide a non-condensing environment.

  • Page 11: User Interface

    2 USER INTERFACE The appliance’s user control interface (see Figure 3) has been designed to maximise the ease of use and efficiency of the heating system. The interface is a touchscreen with all interactions being performed on the screen itself. On powering the unit up, the following start up screen will be displayed.
  • Page 12 Figure 4 Screen Icons There are a number of icons/buttons on the home screen as shown above. The meaning and features of these are explained in the points below: ON/OFF Button - Press this button to switch the unit from OFF to ON or vice versa. When the unit is switched ON, the symbol on the button will be red and the screen will appear in full colour as shown above.
  • Page 13 Figure 5 Unit OFF Screen Display LOCK Button - Press this button to lock the display. This function prevents unwanted adjustments of parameters or changing of functions and timeclock on/off periods. When the lock function is activated, the display will ignore all key presses. To unlock the device, press the Lock Button again and then enter the password.
  • Page 14 MODE Button - Press this button to switch between operating MODES. Pressing the button will bring up the following menu screen where the required MODE can then be selected. Figure 6 MODE Menu Screen The required MODE can be selected by pressing one of the five MODE buttons. Details of each MODE are below.
  • Page 15 Temperature Setting Button - Press this button to set the desired temperatures. Pressing the button will bring up the following menu screen where the required temperature can then be set. Figure 7 Temperature Setting Menu Screen Depending on the current mode of the unit, the Temperature Setting Menu Screen will display the relevant temperatures available to be modified.
  • Page 16 Figure 8 Temperature Setting Menu Screen The required setting should be entered using the keypad and then confirmed with the ‘Enter’ button. To return to the setting screen, press the ‘Return’ button. To modify another setting, repeat the above procedure. To return to the Home Screen press the ‘Return’ button located at the top left of the Temperature Setting Menu Screen.
  • Page 17 Timeclock Button - Press this button to set the internal timeclock. When the button is green, it indicates that the timeclock function is active. If the timeclock function is not active, the button will be white. Pressing the button will bring up the following setup screen where the required timeclock can then be set.
  • Page 18 Settings Button - Press this button to enter the Setting Menu. Pressing the button will bring up the following menu screen where five further Settings Menus can be found. Figure 10 Settings Menu Screen The Settings Menu Screen features six further Setting Sub-Menus. These include Status, Clock, Electric heating, Mute, Factory &...
  • Page 19 Status – Press this button to enter the Status Sub-Menu. Pressing the button brings up the following display screen which displays the current status of the unit, the current mode the unit is running in and live data for a number of parameters. These parameters include Inlet Water (Heating Return) Temperature, Outlet Water (Heating Flow) Temperature, Water Tank (DHW Cylinder) Temperature and the Ambient Outdoor Temperature.
  • Page 20 Clock – Press this button to enter the Clock Sub-Menu. This sub-menu allows the clock to be set to the current time and date. This must be accurately set to enable the timeclock functionality and monitoring system to operate correctly. The clock sub-menu is shown below. Figure 12 Clock Sub-Menu Screen The date and time can be set using the up and down arrows shown in the display above (hold the buttons down to speed up the adjustment).
  • Page 21 Electric (Fast) Heating - Press this button to enable or disable Fast Heating (when available). Fast Heating is only available when an auxiliary electric heater such as an immersion heater in the hot water cylinder has been fitted. Pressing the button will bring up the following menu screen, where the fast heating function can be enabled or disabled.
  • Page 22 Mute – Press this button to enter the Mute Sub-Menu. This sub-menu allows the unit to be switched into or out of Quiet Mode and also for Quite Mode to be scheduled at certain times of the day/night. In Quiet Mode, the unit will run at a slower speed with the fan speed also reduced to provide quiet operation.
  • Page 23 Figure 15 Mute Timer Sub-Menu Screen The functionality can be enabled or disabled by pressing the ON button on the left as shown above. Pressing the ON button will turn it green, indicating it is active and the ON time is set using the Hour and Minute settings above.
  • Page 24 Factory – Press this button to enter the Factory Settings Password Screen. The Password Screen is shown below. Figure 16 Factory Password Entry Screen Enter Password ‘0022’ to enter the Engineer Parameter Sub-Menu. NOTE: This Sub-Menu should only be accessed by a suitably trained engineer. Modifying parameters can cause operating errors and malfunction of the unit.
  • Page 25 Figure 17 Factory Password Entry Screen Parameters – Press this button to enter the Parameters Sub-Menu. Pressing the button brings up the following configurable display screen which features a large number of editable parameters spread across a number of pages. These parameters are detailed in section 3.11. Figure 18 Parameters Sub-Menu Screen Page 23...
  • Page 26 Defrost – Press this button to enter the Defrost Sub-Menu. This sub-menu allows the unit to be switched into or out of manual Defrost mode. Switching the Defrost Button to ‘On’ will switch the unit into Defrost mode which will continue until a full defrost cycle has occurred. Manual defrost mode can be exited at any time by switching the Defrost Button to ‘Off’.
  • Page 27 Unit State – Press this button to enter the Unit Status Sub-Menu. Pressing the button brings up the following display screen which displays the current status of a number of outputs spread across a number of tabs. These outputs and their functionality are detailed in Table 5 at the end of this chapter: Figure 19 Unit Status Sub-Menu Screen Page 25...
  • Page 28 Failure – Press this button to enter the Failure Logging Sub-Menu. Pressing the button brings up the following display screen which displays the stored fault codes (most recent first). The date and time are displayed as follows: DAY-MONTH HOUR:MINUTE:SECOND in order to record the exact time when the fault occurred.
  • Page 29 Ambient Temp. Compensation / Weather Compensation – Press this button to enter the Ambient Temperature Compensation (otherwise known as Weather Compensation) Sub-Menu. Pressing the button brings up the following display screen. Ambient Temp / Weather Compensation can be enabled/disabled using the On/Off button at the top right of the screen. The compensated target is displayed at the bottom right of the screen which is calculated based on the adjustable parameters, Slope and Offset.
  • Page 30 Brightness – Press this button to enter the Brightness Setting Sub-Menu. Pressing the button brings up the following display screen which allows the display brightness to be increased or decreased using the slider. The Brightness Setting Screen is shown below: Figure 21 Brightness Setting Screen Page 28...
  • Page 31 Temperature Curve – Press this button to enter the Curve Sub-Menu. This sub-menu displays a graph showing the Heating Flow, Heating Return and Ambient temperatures when the unit is running (data will not be recorded if the unit is not running). The data is recorded every 5 minutes and displayed in either °C or °F dependent on the user setting (parameter H03).
  • Page 32 Defrosting Icon – The Defrosting Icon (melting Snowflake) indicates that the unit is currently in Defrost Mode. The defrosting icon will continue to show until defrosting is complete. Alarm/Fault Icon – This icon will flash when a fault or alarm is active. Pressing the icon will bring up the Fault History Sub-Menu.
  • Page 33 Table 5 Monitored Parameters Ref. Text Description Expected Value(s) Inlet Water This is the temperature at which the heating Ambient temperature if the appliance (Return) Temp. water returning from either the heating circuit has been off for a time. or to the hot water storage cylinder is No greater than 65°C in normal entering the heat pump.
  • Page 34 /hr when the unit is running. This appliance must be serviced annually or as indicated by the user interface controller. Contact Warmflow for further details. In the event of a breakdown please refer to section 3.14 - Alarms and Troubleshooting.

  • Page 35: Air Source Heat Pump Installation

    150mm above the ground. Flexible feet are available separately from Warmflow in order to provide this gain in height. This should then be installed on a smooth horizontal surface capable of supporting the weight of the unit together with any accessories and other plant.
  • Page 36 SIDE FRONT Figure 24 AS02-R32 Casing Dimensions & Heating Connection Locations Page 34...

  • Page 37: Access

    SIDE FRONT Figure 25 AS03-R32 Casing Dimensions & Heating Connection Locations The heating flow and return connections are located on the right side panel of the AS01-R32, AS02-R32 and AS03-R32 units as shown in the images above. The heating flow (Water Outlet) is the top connection with the heating return (Water Inlet) at the bottom.

  • Page 38: Heating Circuit Connection

    Glycol should be added to the system in areas where the ambient temperature drops below freezing. The amount of Glycol to be added should be determined according to the manufacturer’s instruction. Warmflow provide a non-toxic glycol solution complete with corrosion, scale and biological inhibitor.

  • Page 39: Freeze Protection

    A full flow 3-port motorised valve may also be required for some systems; this can be ordered separately, please contact Warmflow for details. Please see section 3.9 for more details of installing and wiring the 3-port motorised valve. These air source heat pump units come with the following items included integrally, a high flow circulating pump, a manual air vent, flow switch and temperature sensors.
  • Page 40 Figure 26 Heating & DHW Schematic Figure 27 Heating Only Schematic Page 38...

  • Page 41: Defrosting

    An in-line buffer tank accessory is available separately from Warmflow (AS01 – 18l capacity, AS02 – 30l capacity, AS03 – 50l capacity).

  • Page 42: 3-Port Motorised Valve

    cycling and nuisance alarms such as low flow rate. It is also essential to provide freeze protection as detailed in section 3.4.5. An open circuit must always be maintained to allow defrosting to occur. 3.9 3-Port Motorised Valve A full flow 3-port motorised valve is available separately. This 3-port motorised valve has a number of operating positions and comes in two parts, the valve body and the actuator.

  • Page 43: Electrical Installation

    3.10 Electrical Installation Together with the connection to the mains, there are a number of sensors and input/output connections which must be made with the heat pump. These connections are to be made in the installers wiring enclosure. The installers wiring enclosure can be found under the removable plastic cover panel of the heat pump casing.

  • Page 44: Temperature Sensors

    MASTER MODE HEAT/COOL OVER HEAT CYLINDER RT SENSOR ON/OFF HEAT/COOL ON/OFF ON/OFF PROTECTION SENSOR (TT) Figure 30 Installer’s Digital Input Connections (AS01 & AS02) MASTER MODE HEAT/COOL OVER HEAT CYLINDER ON/OFF HEAT/COOL ON/OFF ON/OFF PROTECTION SENSOR (TT) Figure 31 Installer’s Digital Input Connections (AS03) A link wire should be placed between the terminals for the ‘Master On/Off’...

  • Page 45: Digital Outputs

    The link wire complete with a built-in resistor which is wired into the ‘RT’ (13 & 14) terminals on the AS01 & AS02 is required in order to give a reading and enable the unit to operate. This link wire should not be removed. 3.10.4 Digital Outputs The digital outputs section allows the connection of ancillaries which are turned on or off via the units controller.

  • Page 46: User Interface (Controller)

    should be calculated according to the current at full load together with the on-site conditions and the cable length between the relay, the immersion heater and the consumer unit. A DHW storage cylinder immersion may be called to switch on to provide thermal disinfection of the DHW cylinder.
  • Page 47 Once installed, the unit can be set up using the Warmlink App together with the QR Code on the side of the unit. For more details and help with registration, please see the Warmlink App or visit www.warmflow.co.uk. Page 45...

  • Page 48: Parameter List

    3.11 Parameter List Table 8 Protection Parameters Parameter Name Range Default Description Shutdown The outside temperature below which the -25°C Ambient Temp. unit will shut down. Antifreeze Temperature below which Antifreeze 4°C Temperature Protection is enabled Antifreeze Temp. The temperature rise above A04 at which 3°C Difference Antifreeze Protection is disabled...
  • Page 49 Table 10 Pump Parameters Parameter Name Range Default Description Selects the operating mode of the pump, Running Mode 0/1/2 0 for normal, 1 for special, 2 for interval Running Interval Time between pump operating cycle 0~120min 30min Time when the compressor is off Pump operating cycle time when the Running Duration 0~30min...
  • Page 50 Table 12 System Parameters Parameter Name Range Default Description After a power cut, the unit will remain off Auto Start (0) or return to the last mode (1) Cooling Mode Enables or Disables Cooling Mode (0 for Enabling Disabled, 1 for Enabled) Master/Slave Sets the unit as the master (0) or slave Unit...
  • Page 51 Table 14 Thermal Disinfection Parameters Parameter Name Range Default Description Hot water thermal disinfection target Setpoint 60~70°C 63°C temperature Duration of thermal disinfection cycle Time of Duration 0~60min 0min (0 is off) Start Time 0~23h Time when thermal disinfection is on Thermal disinfection cycle schedule Work cycle 1~30days 30days...
  • Page 52 Low Ambient H. Low Ambient Shut Down Temperature -25°C Shut Down Temp During Heating Low Ambient The Maximum Heating Setpoint when the 45°C Max. Heat. Temp Ambient Temp. is low High Amb. DHW Low Ambient Starting Temperature 43°C Start-up Temp During DHW High Amb.DHW Low Ambient Shut Down Temperature...

  • Page 53: Commissioning

    Commissioning The following tasks must be completed in order to commission the ground source heat pump: 3.11.1 Recorded Details The following details must be recorded in the commissioning certificate.  Householder’s Name and Address  Installation Date  Installing Engineer ...

  • Page 54: Dhw Cylinder Heat Up Test

    Figure 34 Weather Compensation Activation & Setting Slope Slope 0.65 Offset Offset Figure 35 Sample Weather Compensation settings for Radiators & UFH 3.11.4 DHW Cylinder Heat Up Test A DHW cylinder heat up test must be completed for units in a system providing both heating and DHW.

  • Page 55: Sign Off

    The appliance must be serviced at least annually or as indicated by the user interface controller (whichever occurs sooner) by a Warmflow Engineer or other competent Engineer. This is necessary in order to optimise performance of the appliance and to ensure its efficiency and safety for the user.
  • Page 56 Note: All product warranties will be invalidated if the appliance is not serviced at least annually or as indicated by the user interface controller (whichever occurs sooner) by a Warmflow engineer or other trained and competent engineer and details recorded in the service record section of this manual.

  • Page 57: Alarms And Troubleshooting

    Suggested actions for each alarm condition are also included. The suggested actions are attributed to the user (typically the homeowner) or a Warmflow engineer or other trained and competent engineer, and should be conducted in the order suggested. The possible causes and suggested actions are not exhaustive.
  • Page 58 Alarm Action By Fault Possible Cause(s) Suggested Action(s) Code User Engineer Test the operation of the heating The temperature sensor is faulty or  Heating Return Temperature Sensor Error return temperature sensor and disconnected. re-connect/replace if necessary. Test the operation of the heating The temperature sensor is faulty or ...
  • Page 59 Alarm Action By Fault Possible Cause(s) Suggested Action(s) Code User Engineer Test the operation of the  Low Ambient Temperature Warning The ambient temperature is too low. ambient temperature sensor and re-connect/replace if necessary. Check the operation of the fan ...
  • Page 60 Alarm Action By Fault Possible Cause(s) Suggested Action(s) Code User Engineer Check there is enough water in  E071 Outlet Water Temp. Lowtemp. The temperature of the outlet water is too low. the system and there are no air locks/lack of flow. Check the wiring and connection There is a communication error between the fan ...
  • Page 61 Alarm Action By Fault Possible Cause(s) Suggested Action(s) Code User Engineer Check the current measurement  Inverter IPM Overcurrent Shutdown Inverter IPM input current is too high. and adjust/replace if necessary. Check the voltage Voltage too low.  Compressor Start-up Failure measurement.
  • Page 62 Alarm Action By Fault Possible Cause(s) Suggested Action(s) Code User Engineer Check the current  IGBT Power Device Error A transducer has overheated. measurement. Check the operation of the  Overload Error The compressor input current is too high. refrigeration circuit in terms of gas pressure and charge.

  • Page 63: Troubleshooting

    3.16 Troubleshooting Other faults or problems with the appliance that may not trigger an alarm are listed below Symptom Possible Cause(s) Suggested Action(s) Action By User Engineer No heat supplied to the property or hot water Timer mode not enabled. Ensure timer mode is enabled in ‘Timer’...

  • Page 64: Your Guarantees, Terms & Conditions

    In the event that components are not capable of repair, Warmflow will provide replacement parts for any such components. Warmflow reserves the right to repair or replace components within the period of guarantee at a time and location that is most convenient to the company.

  • Page 65: Exclusions Of Guarantee

    Warmflow. Invoices for call out and/or repair by any third party or parts supplied by a third party will not be accepted unless previously authorised by Warmflow in writing.
  • Page 66 (l) Defects caused by the improper use or storage of the appliance and in particular (but without limitation) Warmflow shall not be liable in the case of defects arising from normal deterioration or improper or faulty handling or processing of the appliance by the customer;...

  • Page 67: End-Of-Life Information

    5 END-OF-LIFE INFORMATION Warmflow High Efficiency Ground Source Heat Pumps must be disposed of according to local regulations by using a public or private waste collection service. 5.1 Safety Risks Prior to disassembly, the appliance should be electrically isolated and disconnected.
  • Page 68  Ensure that the certificate is signed by both the Competent Person and the Customer.  Register the Appliance.  Remove the white copy of the Installation/Commissioning Certificate.  Send the certificate to Warmflow By post to: Warmflow Engineering Co. Ltd. Lissue Industrial Estate...

  • Page 69: Appendix A: Tables For Volume Calculation

    6 APPENDIX A: TABLES FOR MINIMUM CIRCULATING VOLUME CALCULATION. Typical Pipe Volumes Pipe Type O.D. (mm) I.D. (mm) Volume per metre (l) 13.6 0.145 20.2 0.320 Copper (Table X) 26.2 0.539 32.6 0.835 0.043 0.050 0.113 0.113 Plastic (Push Fit) 0.254 22.8 0.408...

  • Page 70: Appendix B: Wiring Diagrams

    7 APPENDIX B: WIRING DIAGRAMS Page 68...
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  • Page 73  PLEASE COMPLETE IN BLOCK CAPITALS Installation & Commissioning Certificate Date of Installation: Date of Commissioning: 1. Installation Engineer Details 5. Commissioning Engineer Details MCS/SEAI Registration No. MCS/SEAI Registration No. Installation Company Name Commissioning Company Name Installation Company Address Commissioning Company Address Contact Telephone No.
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  • Page 75: Appliance Service Records

     All product warranties will be invalidated if the appliance is not serviced at least annually or as indicated by the user interface controller (whichever occurs sooner) by a Warmflow engineer or other trained and competent Engineer and details recorded in the service record section of this manual.
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  • Page 89 ASHP MAN This manual is accurate at the date of printing (E&OE) but will be superseded 7723 and should be disregarded if specifications and/or appearances are changed in ISSUE A the interests of continued product improvement. FEB 2022 Page 87...

This manual is also suitable for:

As01-r32As02-r32As03-r32

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