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Andrews RFF190 Installation Manual, Operation And Service Manual

B series.
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T H I S
M A N U A L
M U S T
B E
K E P T
INSTALLATION
GUIDE,
OPERATION
AND SERVICE
MANUAL
NATURAL GAS
FIRED STORAGE
WATER HEATERS
Models RFF190
W I T H
T H E
A P P L I A N C E
June 2004
RFF280
'B' Series
Part No. E515

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Table of Contents

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   Summary of Contents for Andrews RFF190

  • Page 1 INSTALLATION GUIDE, OPERATION AND SERVICE MANUAL NATURAL GAS FIRED STORAGE WATER HEATERS Models RFF190 RFF280 ‘B’ Series T H I S M A N U A L M U S T K E P T W I T H T H E...
  • Page 2 the nation’s favourite PLUMBING & HEATING SUPPLIES FREE SHIPPING SECURE PAYMENTS on all orders over £100 to mainland UK shop online with confidence FINANCE AVAILABLE PRICE MATCH spread the cost with low interest rates always get the best deals available we have H U G E R E D U C T I O N S...
  • Page 4 The attention of U.K. users is drawn to their responsibilities under the Health and Safety Regulations 1993. All installation and service on the Andrews Water Heater 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 6: Table Of Contents

    CONTENTS PAGE SECTION 1 GENERAL AND SAFETY INFORMATION General Information British Standards Health and Safety Regulations 1993 Legionellae in Water Heaters SECTION 2 TECHNICAL DATA Appliance Dimensions SECTION 3 INSTALLATION Location Flue Systems Air Supply Water Quality and Treatment Water Connections Vented Systems Unvented Systems Gas Connection...
  • Page 7: General And Safety Information

    SECTION 1 GENERAL AND SAFETY INFORMATION GENERAL 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. INFORMATION To ensure the continued, trouble-free operation of your heater at maximum efficiency, it is essential that correct installation, commissioning, operation and service procedures are carried out strictly in accordance with the instructions given in this manual.
  • Page 8: Health And Safety Regulations 1993

    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 manufactured with paramount consideration to safety, certain basic precautions specified in this manual must be taken by the user.
  • Page 9: Technical Data

    SECTION 2 TECHNICAL DATA RECOMMENDED SERVICE CLEARANCE RECOMMENDED SERVICE CLEARANCE Fig 1. MINIMUM SERVICE CLEARANCE APPLIANCE MODEL RFF190 RFF280 DIMENSIONS 1448 1524 inches inches ⁄ ⁄ inches inches inches 1397 1397 inches inches ⁄ mm Min - Max 150 -300...
  • Page 10 TECHNICAL DATA SECTION 2 ANDREWS MODEL NO. RFF190 RFF280 Storage Capacity litre gallons Recovery thro' 44ºC/80ºF gal/h Recovery thro' 56ºC/100ºF gal/h Heat Input kW (Hs) 19.5 Btu/hr 66,534 78,476 Gas Flow Rate 1.82 2.15 64.3 Flue Gas Temp. (Approx) ºC ºF...
  • Page 11: Installation

    5. The lengths of flue pipe may be cut to obtain correct length of flue route required. 6. On vertical flue installations it is important to fit the correct flue terminal E4 supplied by Andrews Water Heaters. 7. For further information contact Andrews Technical Dept. Components supplied...
  • Page 12: Air Supply

    INSTALLATION SECTION 3 FLUE SYSTEM Size RFF190 RFF280 (b Max) 0.3m Fig 2. Typical Flue 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 SECTION 3 INSTALLATION AIR SUPPLY Note: - Both air vents must communicate with the same room or internal space or must both be on the same wall to outside air. Where compartment air vents are open to a room or internal space, the room or internal space must itself have a permanent air vent(s) as previously specified.
  • Page 14: 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 15: Vented Systems

    SECTION 3 INSTALLATION WATER The water heater must be supplied from a cold water feed cistern and the hot water supply pipe must be fitted with an open vent pipe in accordance with BS 5546. Local CONNECTIONS - regulations and bye-laws must be observed when installing the system but typical water VENTED service layouts are shown in Figs.
  • Page 16: Unvented Systems

    SECTION 3 WATER Unvented Systems should be fitted by an Approved Installer. When used in an unvented system, the Andrews Water Heater will supply hot water at CONNECTIONS - a pressure of 3.5bar (50.8lbf/in ) provided that this pressure is available at the mains UNVENTED feed.
  • Page 17 SECTION 3 INSTALLATION Unvented Systems Kit Fig 4. Unvented Systems Kit Ref. Part No. Description B171 Unvented Systems Kit Complete C780 Pressure Reducing Valve/Strainer C781 Check Valve / Expansion Vessel C782 Expansion Vessel E462 Temperature/Pressure Relief Valve C783 Tundish C772 Adaptor B173 Wall Mounting Kit for Expansion Vessel...
  • Page 18 INSTALLATION SECTION 3 Fig 5. Hot Water Service Pipe Cold Water Take Off Check Valve Cold Water Inlet Secondary return via Fig 6. Tee in Drain Port...
  • Page 19: Gas Connection

    SECTION 3 INSTALLATION THE APPLIANCE MUST ONLY BE USED WITH NATURAL GAS. CONNECTIONS 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 SECTION 3 Fig 7. WARNING - DO NOT SWITCH OFF HEATER ELECTRICAL SUPPLY UNLESS CARRYING OUT MAINTENANCE...
  • Page 21: Commissioning

    SECTION 4 COMMISSIONING 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 soap solution.
  • Page 22: Users Safety Guide

    COMMISSIONING SECTION 4 For your safety read before lighting the appliance USERS SAFETY GUIDE 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.
  • Page 23: Operation

    The thermostat has a manual reset button which is pressed to close the ECO and allow the heater to be relit. IF IN DOUBT CONTACT ANDREWS WATER HEATERS...
  • Page 24 Move the gas service cock to "OFF". Isolate from the electrical supply. Unhook and remove the outer door. Remove inner door by sliding it to the side on the RFF190 model, or by removing two screws on the RFF280 model.
  • Page 25: Gas Control Valve

    RFF190 model, or by removing two screws on the RFF280 model. Disconnect burner gas tube, pilot tube and blue ignition lead at gas control.
  • Page 26: Magnesium Anode(s)

    SERVICING SECTION 6 A magnesium sacrificial anode is fitted in the water storage vessel. The function of the MAGNESIUM anode is to provide additional protection, against corrosion, for the inside of the vessel. ANODE The condition of the anode should be checked regularly and replaced. In order to remove the anode close the cold water feed stop valve, open a hot water tap and, by opening the water heater drain valve, drain off sufficient water to clear the top of the vessel.
  • Page 27: Fault Finding

    SECTION 7 FAULT FINDING FAULT ACTION (a) Power to unit interrupted NO IGNITION (b) Thermostat faulty AT PILOT (c) Spark ignition control module faulty (a) Faulty air pressure switch FLUE FAN RUNS (b) Faulty spark ignition lead NO IGNITION SPARK (a) Power to unit interrupted FLUE FAN DOES NOT RUN...
  • Page 28 FAULT FINDING SECTION 7 FAULT ACTION WATER (a) Reset thermostat to lower temperature. TEMPERATURE (b) Thermostat faulty. Check and replace if necessary. TOO HIGH (c) Main gas valve not closing. Clean or replace. WATER (a) Reset thermostat to higher temperature. TEMPERATURE (b) Check gas pressures at burner and at gas inlet to heater.
  • Page 29 SECTION 8 PARTS LIST RFF190 & RFF280...
  • Page 30 PARTS LIST RFF190 & RFF280 SECTION 8 Model RFF190 RFF280 Ref. Part Numbers Description E163 E164 Hot Outlet Nipple/Anode E165 E166 Hydrojet Cold Inlet Diptube C247 C247 3/4NPT x 3/4 BSP Nipple C103 C103 Socket Coupler C381 C381 Drain Cock...
  • Page 31 Notes...
  • Page 33 Wednesbury One, Black Country New Road Wednesbury, West Midlands WS10 7NZ Tel: +44 (0)121 506 7400 Fax: +44 (0)121 506 7401 Email: andrews@andrews-waterheaters.co.uk Website: www.andrewswaterheaters.co.uk 06/04...

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Rff280

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