andrews RSC 9/145 Service Manual
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andrews RSC 9/145 Service Manual

Classicflo balanced range gas fired storage water heaters for natural gas
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INSTALLATION AND SERVICE MANUAL
CLASSICflo Balanced range
Please read and understand these instructions before commencing installation and leave this manual with the customer for future reference. 
 
Andrews. Built to perform.
Issue 4 21042018

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  • Page 1 INSTALLATION AND SERVICE MANUAL CLASSICflo Balanced range Please read and understand these instructions before commencing installation and leave this manual with the customer for future reference.    Andrews. Built to perform. Issue 4 21042018...
  • 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

    Contents   1.1  General Information ..........................4  1.2  British Standards and Codes of Practice .................... 4  1.3  Health and Safety Regulations 1993 ....................5  1.4  Effectiveness in Combating Legionella ....................5  2  Technical Data ............................6  2.3  ErP data .............................. 9  3.2 ...

  • Page 4: General 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 5: 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 6: Technical Data

    Technical Data Appliance Dimensions Fig.1 Model RSC 9/145 RSC 18/270 1276 1505 461.6 461.6 1961 2190 1226 1226 The flue outlet can be installed in any configuration through 180º as long as proper service clearances are observed. 203.2 203.2 Issue 4 21042018...
  • Page 7 CLASSICflo Balanced connections & technical data Natural Gas Unit Andrews Models RSC 9/145 RSC 9/180 Input (gross) 11.1 11.1 Input (net) 10.0 10.0 Output (gross) 8.88 8.88 Efficiency (Net CV) 88.80 88.80 Efficiency (Gross. thermal) Gas Flow Rate 0.93 0.93...
  • Page 8 Blank Page Issue 4 21042018...

  • Page 9: Erp Data

    ErP data RSC 9/145 RSC 9/180 CLASSICflo Balanced Declared load profile Water heating energy efficiency class Water heating energy efficiency 68  67  Annual energy consumption 62  62  Annual energy consumption 22  22  Other load profiles for which the water heater is suitable to use and the...

  • Page 10: Location

    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 2 or 3 are used we recommend that the flue outlet can be installed in any configuration through 180° as long as proper service clearances are observed, see fig.2. Model RSC 9/145 Flueing Option Installation 1 Installation 2 Installation 3...

  • Page 12: Flue Fitting Instructions

    Flue Fitting Instructions 1. Fit heater adaptor D1 to heater ensuring correct location on primary flue spigot from heater. (Use 4 self tapping screws provided). Fig. 3 2. Fit flue restrictor ring D7 into heater adaptor D1. The correct size of restrictor for each heater model and installation is shown on page 11.

  • Page 13: Air Supply

    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 14: Important

    Important The supply of air to a space housing the heater(s) by mechanical means should be:- Mechanical inlet with natural extraction. 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 15: Water Quality And Treatment

    These anodes are available as an optional extra on all Andrews heaters. In hard water areas, scale formation can occur in hot water systems and hot water heaters and the higher the temperature and volume of water used, the more problematic the scale build- up can be.

  • Page 16: Water Connections - General

    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. The upper “jet ports”...
  • Page 17 3.8.3 Water Connections - Unvented Systems Unvented Systems should be fitted by an Approved Installer. Fig. 6 When used in an unvented system, the Andrews Water Heater Balanced cold will supply hot water at a pressure of 3.5bar (50.8lbf/in water take-off provided that this pressure is available at the mains feed.
  • Page 18 3.8.4 Unvented Systems Kit Fig. 8 3.8.5 Unvented Systems Kit - Parts List Ref. Part No. Description 7703928 Unvented Systems Kit Complete Comprises Pressure Reducing /Check/Exapnsion Valve F1&2 7705036 Expansion Vessel 24L 7705037 T/P Relief Valve 7 bar/95ºC x 3/4" 7705038 Tundish 7705039...

  • Page 19: Gas Connections

    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: 3.11 Wiring Diagram

    3.11 Wiring Diagram Fig. 9 Issue 4 21042018...

  • Page 21: Commissioning

    Commissioning Commissioning 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

    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: Operation

    (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 Issue 4 21042018...

  • Page 24: Burner Flame Check

    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

    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 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 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 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).   Fig. 19 2. Press ‘SET’ button to change temperature format. Symbol °F/ °C will flash (Fig. 20).  ...
  • 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: Introduction

    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 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: Burner Assembly

    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, gas control wiring loom.

  • Page 33: Gas Control Valve

    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. 1. Isolate from the electrical supply. Unhook and remove the Fig.

  • Page 34: Magnesium Anode

    Magnesium Anode A magnesium sacrificial anode is 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: Accessing Service Mode On The Water Heater Display (Service Personnel Only)

    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. To enter the Service Mode, follow the steps illustrated below: Warning The following procedure is for service and installation...
  • Page 36 6.6.1 Sequence of modes available in ‘Service Mode’ Error code shown in by pressing the ‘Select’ button 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 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 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 6.6.2 To change the Maximum Setpoint Limit (Max Setpoint) for the temperature setpoint °F Setpoint idle 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 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 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 ‘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 Changes to ‘°C’ 3a. Press ‘Temperature Up’ button to change temperature format to °C (Fig. 55). °C          °F/°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  ...

  • Page 44: How To Reset The Control From Lockout Conditions

    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 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 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: Diagnostic Error Codes And Troubleshooting Procedures For Honeywell Integrated

    Diagnostic error codes and troubleshooting procedures for Honeywell integrated control Definition of code Error 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 Error code Definition of code Cause of problem and actions taken to correct 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 Fault Finding Fault Action NO IGNITION Power to unit interrupted AT PILOT Thermostat faulty Spark ignition control module faulty FLUE FAN RUNS NO Faulty air pressure switch IGNITION SPARK Faulty spark ignition lead FLUE FAN DOES Power to unit interrupted NOT RUN Faulty fan motor Flue fan ECO actuated...

  • Page 50: Parts List

    Parts List General Assembly Issue 4 21042018...
  • Page 51 Issue 4 21042018...

  • Page 52: Control Box Assembly

    Control Box Assembly Issue 4 21042018...

  • Page 53: General Assembly Parts List

    General Assembly Parts List General Assembly No. Part No. Description Qty RSC9/145 RSC9/180 Plenum • • 7704029 Plenum Gasket • • 7678672 Flue Reducer • • 7704031 Flue Baffle • 7704030 Flue Baffle • 7704032 Cold Water Inlet Dip Tube •...
  • Page 54 Fittings Pack No. Part No. Description RSC9/145 RSC9/180 7697191 Fittings Pack • • C382AWH Gas Cock ½" • • C381AWH Water Cock ¾" • • C103AWH Socket ¾" • • Flue Compenonts E072 Heater Adaptor • • E069 Flue 0.5 M •...

  • Page 55: 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 56 CLASSICflo balanced flue range | INSTALLATION AND SERVICE MANUAL www.andrewswaterheaters.co.uk/warranty April 2018 Customer support Monday - Friday 8am - 5pm Sales 0345 070 1055 Technical 0345 070 1057 ICOM Energy Association Website andrewswaterheaters.co.uk Twitter @AndrewsWH Andrews. Built to perform. Issue 4 21042018...

This manual is also suitable for:

Rsc 9/180Rsc 18/270

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