andrews ECOflo COMPACT 20/190 Installation And Service Manual
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andrews ECOflo COMPACT 20/190 Installation And Service Manual

Gas fired, fan-flued storage water heaters for natural gas
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INSTALLATION AND SERVICE MANUAL
ECOflo
COMPACT
20/190
Gas fired, fan-flued storage water heaters for natural gas.
Please read and understand these instructions before commencing installation and leave this manual with the customer for future reference.
Andrews. Built to perform.
7708252 120819 Issue 8.1

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  • Page 1 INSTALLATION AND SERVICE MANUAL ECOflo COMPACT 20/190 Gas fired, fan-flued storage water heaters for natural gas. Please read and understand these instructions before commencing installation and leave this manual with the customer for future reference. Andrews. Built to perform. 7708252 120819 Issue 8.1...
  • Page 2 UK users is drawn to their responsibilities under the Health and Safety Regulations 1993. All installation and service on Andrews Water Heaters must be carried out by properly qualified personnel and, therefore, no liability can be accepted for any damage or malfunction caused as a result of intervention by unauthorised personnel.

  • Page 3: Table Of Contents

    British Standards and Codes of Practice 1.2.1 ECOflo Compact 20/190 Health and Safety Regulations 1993 Effectiveness in Combating Legionella Technical Data Appliance Dimensions ECOflo Compact 20/190 connections & technical data ErP data Installation Introduction Location Flue system ECOflo Compact 20/190 Flue Fitting Instructions...
  • Page 4 6.7.4 Error code history 6.7.5 To view previous error codes Diagnostic error codes and troubleshooting procedures for Honeywell integrated control Fault Finding Andrews 20/190 models Parts List General Assembly Control Box Assembly General Assembly Parts list Appendix Dismantling, Disposal and Recycling...

  • Page 5: General And Safety Information

    General and Safety Information General and Safety Information General Information The Andrews Water Heater has been designed for use with NATURAL GAS only and is manufactured to give an efficient, reliable and long service life. To ensure the continued, trouble-free operation of your heater at...

  • Page 6: Health And Safety Regulations 1993

    Andrews Water Heaters should only be used in the manner and purpose for which they were intended and in accordance with the instructions in this manual. Although the heaters have been...

  • Page 7: Technical Data

    Technical Data Technical Data Appliance Dimensions Fig. 1 Recommended service clearance Recommended service clearance Minimum service clearance Model 20/190 1730 1460 1440 1180 1995 min/max mm 555 - 7000 min/max mm 150 - 300 7708252 120819 Issue 8.1...

  • Page 8: Ecoflo Compact 20/190 Connections & Technical Data

    Technical Data ECOflo Compact 20/190 connections & technical data Unit 20/190 NG Input (gross) 21.1 Input (net) Output (gross) 19.3 Efficiency (gross CV) 91.4 Efficiency 82.3 Gas Flow Rate m3/hr 1.95 Main Injector Size 2.71 Inlet Gas Pressure mbar 18-25...

  • Page 9: Erp Data

    Technical Data ErP data ECOflo Compact 20/190 20/190 Declared load profile Water heating energy efficiency class Water heating energy efficiency Annual energy consumption 32.6 Annual energy consumption Other load profiles for which the water heater is suitable to use and the corresponding...

  • Page 10: Installation

    Installation Installation Introduction The law requires that installation is carried out by a properly qualified person Install in accordance with current British Standard Code of Practice 342 part 2 and British Standards 5440, 5546, 6644, 6700, 6798 and 6891. Location The location chosen for the heater must permit the provision of a satisfactory flue and an adequate air supply.

  • Page 11: Ecoflo Compact 20/190 Flue Fitting Instructions

    Installation Fig. 2 • Total flue length should not exceed 8M for either vertical (a) or horizontal (b) applications. Size 20/190 • Appropriate flue length reductions should be made for each 45° & 90° bend in the system. • All horizontal runs should be adequately supported and maintain a 3°...

  • Page 12: Air Supply

    Installation Air Supply Detailed recommendations for air supply are given in BS 5440 part 2. The following notes are intended to give general guidance: Where the heater is to be installed in a room or internal space the heater requires the room or internal space containing it to have a permanent air vent.

  • Page 13: Important

    Installation Important The supply of air to a space housing the heater(s) by mechanical means should be:- a) Mechanical inlet with natural extraction. b) Mechanical inlet with mechanical extraction. NB - Natural inlet with mechanical extraction must not be used. Where a mechanical inlet and mechanical extraction system is used, the design extraction rate must not exceed one third of the design inlet rate.

  • Page 14: Water Quality And Treatment

    This problem can be minimised by reducing the water temperature in the heater and by fitting suitable water pre- treatment equipment. Note When installing Andrews Water Heaters in hard water areas we would recommend that a water treatment specialist is consulted. 7708252 120819 Issue 8.1...

  • Page 15: Water Connections - General

    Installation Water Connections - General 3.8.1 Hydrojet System Fig. 4 The heater is fitted with the Hydrojet Total Performance System incorporated in the cold inlet dip tube. The tube is designed to increase turbulence and reduce sediment build up, reduce thermal stacking and increase delivery.

  • Page 16: Water Connections - Unvented Systems

    Fig. 7 Unvented Systems should be fitted by an Approved Installer. When used in an unvented system, the Andrews Water Heater will supply hot water at a pressure of 3.5bar (50.8lbf/in provided that this pressure is available at the mains feed. During...

  • Page 17: Unvented System Kit

    3.8.5 Unvented Systems Kit - Parts List feed Drain port Complete Unvented System Kit. Part No. 7703928 (Comprising D1-D6) Components Andrews Part No. Size Combined Pressure Reducing Valve 3.5 bar/Strainer/Check Valve/Expansion Relief Valve 6 bar 7705036 22mm comp Expansion Vessel (24 Litre) c/w bracket 7705037 ¾"...

  • Page 18: Condensate Drain Connection

    Installation Condensate Drain Connection This is a condensing water heater and requires a drain to allow the condensate to discharge safely. If a drain is not in close proximity, a condensate pump may be required to pump the condensate to the closest drain. A self-priming trap is integrated in the condensate/pressure tube, allowing the connection to the ½”...

  • Page 19: Gas Connections

    Installation 3.10 Gas Connections THE APPLIANCE MUST ONLY BE USED WITH NATURAL GAS. The installation of the gas supply should conform to the requirements of IM/16 published by British Gas p.l.c. or BS 6891. Jointing compound used must conform to BS 5292 pt 5. Caution Do not apply heat in close proximity to the gas control as this will result in damage occurring to the control.
  • Page 20 Installation 3.12 Wiring Diagram Fig. 9 7708252 120819 Issue 8.1...

  • Page 21: Commissioning

    Commissioning Commissioning 20/190 4.1.1 To Light the Burner Caution Do not operate the water heater until the storage vessel is completely filled with water, with water running from all hot taps. Open the main gas supply valve after all connections to the gas control valve are complete, and test all connections with leak spray.

  • Page 22: Users Safety Guide 23

    Commissioning Users Safety Guide Note For your safety read before lighting the appliance Warning 1. Always follow manufacturers instructions when lighting the appliance. Failure to do so may result in damage to property, personal injury or loss of life. 2. Before lighting check all round the appliance area for gas.

  • Page 23: Burner Assembly

    (ECO). In the event of high water temperature the gas supply will be shut off automatically. The high temperature condition must be identified and rectified before the heater is relit. See Section 7 (fault finding). Note If in doubt contact Andrews Water Heaters 7708252 120819 Issue 8.1...

  • Page 24: Burner Flame Check

    Operation Burner flame check Steel Burner: These models are equipped with self-adjusting air mixture and do not have an adjustable air shutter. At the time of installation and during annual maintenance, a visual check of the pilot and burner flames should be made to determine if they are burning properly.

  • Page 25: Temperature Selection Procedure

    Operation Temperature selection procedure For energy efficient operation of your water heater, the suggested initial temperature setting is 60°C. Warning If the water heater display does not show ‘Operational’ in the ‘Status’ indicator, there may be an operating malfunction with the water heater. If this is the case, a numeric code will be displayed.

  • Page 26: Water Heater Display And Control Buttons

    Operating 5.4.1 Water heater display and control buttons Temperature Setpoint Shown flashing in display in Degrees F or Degrees C only when temp is adjusted Range 70 - Max. °F Range 21 - Max °C Temperature up button Sequence of operation indicator reads ‘Idle’...

  • Page 27: To Decrease Setpoint Temperature

    Operating 5.4.3 To decrease Setpoint temperature 1. Depress and hold ‘Temperature Down’ button until desired setpoint temperature appears in the display (Fig. 16). Fig. 16 ‘Setpoint’ 2. ‘Setpoint’ indicator begins flashing in the display after flashes pressing ‘Temperature Down’ button (Fig. 17). Fig.

  • Page 28: To Change Temperature Format In Display From °F To °C Or °C To °F

    Operating 5.4.4 To change temperature format in display from °F to °C or °C to °F 1. Press ‘SELECT’ button until °F/ °C is displayed (Fig. 19). °F/°C Fig. 19 2. Press ‘SET’ button to change temperature format. Symbol °F/ °C will flash (Fig. 20). °F/°C °F/°C flashes...
  • Page 29 It is recommended that all service work be performed by Andrews Water Heaters Service Team. If the water heater is to remain idle for 30 days or more or is subjected to freezing temperatures while shut off, the water heater and piping should be fully drained (See “To Drain the...
  • Page 30 Whilst giving the following instructions for the care of the Andrews Water Heater, the water heater is a gas appliance and as such should be serviced annually by either Andrews Water Heaters service team or a competent trained service engineer.
  • Page 31 Servicing 5. Annually remove the inner door and main burner assembly to clean orifices and related parts of any dirt or other foreign material. Inspect the burner ports for obstructions or debris and clean with a wire brush as needed. Wire brush and/or vacuum clean the combustion chamber as needed to remove scale deposits and debris.
  • Page 32 Servicing Servicing Burner Assembly 6.2.1 The burner assembly should be cleaned and checked annually 1. Move the gas service cock to "OFF". Isolate from the electrical supply. Unhook and remove the outer door. 2. Disconnect from the bottom of the gas control valve, the pilot tube, and disconnect all wires from gas valve.
  • Page 33 Servicing Gas Control Valve This should be checked and serviced by an engineer fully conversant with every aspect of this piece of equipment. To change the gas valve it is not necessary to drain down the water heater. Fig. 25 1.
  • Page 34 Servicing Magnesium Anode Two magnesium sacrificial anodes are fitted in the water storage vessel. The function of the anode is to provide additional protection, against corrosion, for the inside of the vessel. The condition of the anode should be checked regularly and replaced.
  • Page 35 Servicing Accessing service mode on the water heater display (Service personnel only) The display has a ‘service mode’ for changing the maximum setpoint and accessing information in aiding servicing of the water heater. This procedure is for service and installation personnel only.
  • Page 36 Servicing 6.6.1 Sequence of modes available in ‘Service Mode’ by pressing the ‘Select’ button Error code shown in water heater display Error Code Number (Display/Reset). This is only shown if there is an operating error in the ‘User Mode’ (Fig. 28). Fig.
  • Page 37 Servicing 2c. Water Temperature - Lower Sensor (Displays if there are two sensors) (Fig. 32). idle Fig. 32 3. Flame Current of Pilot Flame Sensor (Displays only in the Heating Cycle) (Fig. 33). µA Flame Current Fig. 33 4. Setpoint (Display/Change) (Fig. 34). setpoint idle Fig.
  • Page 38 Servicing 6. Differential (Display only – shows the differential of the thermostat) (Fig. 36). °F Differential idle Fig. 36 7. Software Version (Display only) (Fig. 37). Soft idle Fig. 37 No current error codes 8. Error Code History (Displays if there are present error codes or up to 10 previous error codes).
  • Page 39 Servicing 6.6.2 To change the Maximum Setpoint Limit (Max Setpoint) for the temperature setpoint Warning Setting the water temperature to the maximum set point can result in scalding hot water delivered to the domestic hot water outlets. It is highly recommended that the maximum setpoint be adjusted to the lowest temperature possible for the needs of the installation.
  • Page 40 Servicing 5. 30 Seconds after the last button press, the Water Heater Display will go back to ‘User Mode’. It will read ‘Max Setpoint’ without showing a temperature value if the temperature setpoint is at the maximum setting. The Water Heater Display can be set back to the ‘User Setpoint Mode’...
  • Page 41 Servicing 6.6.4 To display flame sense current of the pilot flame sensor The pilot flame sense current is available only when the burners are in operation. Flame Current µA Heating 1. Make sure the status displays ‘Heating’ or draw enough hot water to start the burners.
  • Page 42 Servicing ‘Setpoint’ flashes 4. To lower the temperature setpoint, press the ‘Temperature Down’ button until the desired temperature is shown on the water heater display (Fig. 51). setpoint °F idle Fig. 51 ‘Setpoint’ stops flashing 5. When the desired setpoint is reached on the water heater display, press the ‘Set’...
  • Page 43 Servicing Changes to ‘°C’ 3a. Press ‘Temperature Up’ button to change temperature format to °C (Fig. 55). °F/°C °C ‘°F/°C’ Flashes Fig. 55 Changes to ‘°C’ 3b. Press ‘Temperature Down’ button to change temperature ‘°F/°C’ format to °F (Fig. 56). Flashes °F/°C °F...
  • Page 44 Servicing How to reset the control from Lockout conditions Warning The following procedure is for service and installation personnel only. Resetting lockout conditions without correcting the malfunction can result in a hazardous condition. If an error code is displayed (except for #4, low flame sense current), the water heater will be in a ‘lockout condition’...
  • Page 45 Servicing 6.7.3 Error codes and error history display If there is an operating problem with the water heater, an error code number will appear on the water heater display with ‘Service Needed’ to the right of the ‘Status’ indicator. The error code label is located below the water heater display and the following section in this Installation and Operating Instruction Manual explains the error codes with corrective actions to repair...
  • Page 46 Servicing Error code index 4. Press the ‘Temperature Down’ button to change to the previous code index, code #9 (Fig. 66). idle Fig. 66 Stored error code for code index #9 5. Press the ‘Select’ button for code index #9 to view if there are any code numbers (Fig.
  • Page 47 Servicing Diagnostic error codes and troubleshooting procedures for Honeywell integrated control Error code Definition of code Cause of problem and actions taken to correct Low flame sense Determine flame sense current in the Service mode with the water heater operating. If less than 1.0 microamps, check pilot flame sense rod with emery cloth.
  • Page 48 Servicing Definition of code Cause of problem and actions taken to correct Error code Lower sensor Resistance of lower sensor out of operating range. Check readings faulty continuity of wire harness to lower sensor, and if O.K., replace lower sensor. Flame rod shorted Pilot flame sensor rod is shorted to ground.
  • Page 49 Fault Finding Fault Finding Andrews 20/190 Fault Action NO IGNITION (a) Power to unit interrupted AT PILOT (b) Thermostat faulty (c) Spark ignition control module faulty FLUE FAN RUNS NO (a) Faulty air pressure switch IGNITION SPARK (b) Faulty spark ignition lead...
  • Page 50 Parts List Parts List General Assembly Fig. 69 7708252 120819 Issue 8.1...
  • Page 51 Parts List Control Box Assembly Fig. 70 7708252 120819 Issue 8.1...
  • Page 52 Parts List General Assembly Parts List No. Part No. Description No. Part No. Description 7678861 Surround 239-81842-00 Terminal 7723260 2" Exhaust Adapter 239-81844-00 7678863 Blower 7678965 Thermal Switch 7678924 Jacket Head E462 Temperature/Pressure Valve ¾" 7678925 Jacket Head insulation *62 7678940 *Burner Z194 Screws...
  • Page 53 Appendix Appendix Dismantling, Disposal and Recycling Warning Only qualified competent persons should remove and dismantle the appliance. Before removing and dismantling please ensure you safely remove the power supply and isolated the appliance from the water and gas connections. Dispose of the appliance correctly according to the laws and regulations in force.
  • Page 54 © Copyright All technical and technological information contained in these technical instructions, as well as any drawings and technical descriptions supplied, remain our property and shall not be multiplied without our prior consent in writing. Subject to alterations. 7708252 120819 Issue 8.1...
  • Page 55 7708252 120819 Issue 8.1...
  • Page 56 ECOflo Compact 20/190 | INSTALLATION AND SERVICE MANUAL 0 0 6 3 July 2019 Customer support Monday - Friday 8am - 5pm Sales 0345 070 1055 Technical 0345 070 1057 ICOM Website Energy Association andrewswaterheaters.co.uk Twitter @AndrewsWH Andrews. Built to perform. 7708252 120819 Issue 8.1...

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