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andrews 32/143 Installation Manual, Operation And Service Manual

Gas fired storage water heaters
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See also: Installation Manual, Operation and Service Manual
This manual must be kept with the appliance
Part No E132
Gas Fired Storage
Water Heaters
Installation guide, operation
and service manual

Natural Gas

HI-FLO RANGE
Models 32/143, 65/173, 81/264, 62/341, 54/418, 54/440
Permanent Pilot, Auto Ignition with Flue Damper 'E'/'F' Series
STANDARD RANGE
Models 24/39, 32/40, 40/61, 63/62, and 84/87
Permanent Pilot, Auto Ignition 'G' Series
Working towards
a cleaner future
January 2011

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Summary of Contents for andrews 32/143

  • Page 1: Natural Gas

    Installation guide, operation and service manual Natural Gas HI-FLO RANGE Models 32/143, 65/173, 81/264, 62/341, 54/418, 54/440 Permanent Pilot, Auto Ignition with Flue Damper ‘E’/‘F’ Series STANDARD RANGE Models 24/39, 32/40, 40/61, 63/62, and 84/87 Permanent Pilot, Auto Ignition ‘G’ Series...
  • Page 2 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 4: 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 Standard Range Hi-Flo Range SECTION 3 INSTALLATION Introduction Draught Diverter Location Gas Supply Electrical Supply Flue Systems Air Supply and Ventilation Water Quality and Treatment...
  • Page 5 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 6: General And Safety Information

    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 7: Technical Data

    SECTION 2 TECHNICAL DATA STANDARD ANDREWS MODEL NO. 24/39 32/40 40/61 63/62 84/87 RANGE Storage Capacity Recovery thro' 44ºC/80ºF gal/h Recovery thro' 56ºC/100ºF gal/h Heat Input Gross 12.5 Btu/h 40,944 42,650 65,000 65,000 88,712 Heat Input Net 11.4 Btu/h 37,532 38,900 58,004 58,004 81,888...

  • Page 8: Hi-Flo Range

    TECHNICAL DATA SECTION 2 ANDREWS MODEL NO. 32/143 65/173 81/264 62/341 54/418 54/440 Hi-Flo Storage Capacity 295* 368* 282* 245* RANGE Recovery thro' 44ºC/80ºF 1199 1549 1900 1998 gal/h Recovery thro' 56ºC/100ºF 629* 1239* 1520* 1598* gal/h Recovery thro' 72ºC/130ºF...

  • Page 9: Installation

    ⁄ in BSP (Hi-Flo only). 2 - 1 ⁄ in x 3in Nipples (32/143 Model only). 1 - Warranty Card. The draught diverter must be assembled with the legs provided. ASSEMBLING Attach the legs to the draught diverter with the nuts and bolts provided.

  • Page 10: Gas Supply

    GAS SUPPLY THE ANDREWS WATER HEATERS COVERED IN THIS MANUAL MUST ONLY BE USED WITH NATURAL GAS. The installation of the gas supply must conform, depending on it's size, to the requirements of British Standards and Codes of Practice listed in Section 1 of this manual.

  • Page 11: Electrical Supply

    It is recommended that screen cable is used where the volt-free contacts are to be connected from an external supply. This will eliminate the risk of possible interference from nearby high voltage cables. Data sheets available for Hi-Flo and Standard Range, Automatic Ignition Control System. Contact Andrews Water Heaters.
  • Page 12 INSTALLATION SECTION 3 Fig 3a. Standard Range Fig 3b. Hi-Flo Range...

  • Page 13: Flue Systems

    SECTION 3 INSTALLATION FLUE Detailed recommendations for flue installation are given in BS 6644, BS5440 Pt 1 and British Gas publication IM/11 - Flues for Commercial and Industrial Gas Fired Boilers and SYSTEMS Air Heaters. The flue connection is designed for BS 835 type heavy duty flue, but light quality flue pipe, mild steel or stainless steel sheet may be used using the appropriate adapter.
  • Page 14 *A minimum of 600mm of vertical flue directly above the draught diverter should be provided where possible on all natural draught flue installations. If this dimension cannot be achieved please contact Andrews Water Heaters. Please note this is not required where a common flue header is used on multiple installations.

  • Page 15: Air Supply And Ventilation

    SECTION 3 INSTALLATION Minimum Heights from Roof to Base of Flue Terminal Not within 1.5m (5ft) of a Within 1.5m (5ft) of a vertical surface of a vertical surface of a structure ≠ on the roof structure ≠ on the roof Type of Roof Internal Route External...

  • Page 16: Air Supply

    INSTALLATION SECTION 3 IMPORTANT! AIR SUPPLY 1. The effective area requirements specified in the table are related to the maximum net input of the heater(s) and are equivalent to those specified in BS 6644 and VENTILATION IGE/UP/10 Pt.1. 2. The free area of the grilles should not be less than the size of the recommended ventilation opening.

  • Page 17: Water Quality And Treatment

    BEMS version is available, which provides a remote warning signal. 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 18: Water Connections- Hydrojet System

    INSTALLATION SECTION 3 WATER CONNECTIONS Hydrojet System The upper “jet ports” direct the flow outward to begin the dynamic mixing action. The lower “jet ports” direct the flow inward to increase the turbulence. Tank Heater Casing All models now incorporate the new Mini Hydrojet system on cold inlet side connections.

  • Page 19: Vented Systems, Standard Range

    SECTION 3 INSTALLATION WATER VENTED SYSTEMS, STANDARD RANGE CONNECTIONS 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 and BS 6644.
  • Page 20 INSTALLATION SECTION 3 Fig 6A. Fig 7.

  • Page 21: Unvented Systems, Standard Range

    CONNECTIONS 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.
  • Page 22 INSTALLATION SECTION 3 WATER CONNECTIONS Fig 9. Fig 10.

  • Page 23: Vented Systems, Hi-Flo Range

    All Models. Front inlet/outlet water connections Models 32/143. Optional rear inlet/outlet water connections Assemble onto the 3/4 BSP thread, the 3/4 BSP coupler socket (1) and drain cock using a suitable jointing compound.
  • Page 24 Cold Inlet/Hot Outlet on models Automatic Air Vent 65/173 32/143 81/264 62/341 54/418 54/440 Front T & P Valve Tapping Cold Inlet/Hot Outlet All Models Optional Rear Drain & Cold Inlet/Hot Outlet Secondary Return Tappings 32/143 only Tapping Fig 11. Fig 12.
  • Page 25 SECTION 3 INSTALLATION WATER CONNECTIONS Fig 13. Fig 14.

  • Page 26: Unvented Systems, Hi-Flo Range

    CONNECTIONS 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.
  • Page 27 SECTION 3 INSTALLATION WATER If higher flow rates are required for the cold water services, a suitable tee fitting should be fitted to the pipework, upstream of item C1. CONNECTIONS The pipework fitted to the tundish outlet should be at least 28mm diameter and should be terminated at a suitable drain (see Building Regulations 1991 Approved Document G3).
  • Page 28 INSTALLATION SECTION 3 WATER CONNECTIONS Fig 17. Fig 18.

  • Page 29: Commissioning

    SECTION 4 COMMISSIONING STANDARD CAUTION! DO NOT OPERATE THE WATER HEATER UNTIL THE STORAGE VESSEL IS COMPLETELY FILLED WITH WATER, WITH WATER RANGE RUNNING FROM ALL HOT TAPS. PERMANENT PILOT MODELS Open the main gas supply cock after all connections to the gas control are completed and test all connections, using proprietary leak detection fluid.
  • Page 30 COMMISSIONING SECTION 4 Shutting Off The Burner For long periods only (7 days or more) turn gas control knob to PILOT, depress slightly and turn clockwise to OFF. Turn off the gas service cock. For shorter periods, leave the heater under thermostat control. NOTE! If the pilot goes out for any reason, turn off heater and wait for 3 minutes before relighting.
  • Page 31 SECTION 4 COMMISSIONING HI-FLO RANGE Lighting the Burner PERMANENT Open the main gas supply cock after all connections to the gas control are completed PILOT MODELS and test all connections using a manometer. Purge air from pipework and ensure there are no loose connections to burner or pilot pipe.
  • Page 32 COMMISSIONING SECTION 4 Shutting Off The Burner For long periods only, (7 days or more) turn control knob to PILOT, partially depress knob, then turn clockwise to OFF. Turn off gas service cock. For shorter periods leave heater under thermostat control. Checking Main Burner Pressure 1.
  • Page 33 SECTION 4 COMMISSIONING STANDARD Lighting the burner RANGE AUTO IGNITION Thermostat Control On/Off Switch MODELS Knob Gas Control valve Fig 23. 1. Ensure gas supply is on. 2. Set thermostat control knob to the required water temperature. (See below). 3. Ensure time switch if fitted is in the ON position. 4.
  • Page 34 COMMISSIONING SECTION 4 Checking main burner pressure 1. Turn gas supply OFF. 2. Release bleed screw A and connect pressure gauge tube (See Fig. 24) 3. Light burner as described previously. 4. Remove cap from port B and adjust pressure using exposed screw in accordance with data plate (See Fig.
  • Page 35 SECTION 4 COMMISSIONING Lighting the Burner Hi-Flo RANGE AUTO IGNITION MODELS Gas control Pink MV Knob Black PV-MV Fig 25. Purple PV 1. Ensure gas supply is ON. 2. Turn gas control knob to ON position. 3. Using control thermostat, select required water temperature. 4.
  • Page 36 COMMISSIONING SECTION 4 Check correct shape and size of Pilot Flame HI-FLO No adjustment is provided for the pilot. The restrictor C on the gas control (see Fig. 22) RANGE should be turned fully conterclockwise to the fully open position. PERMANENT PILOT MODELS Fig 26.
  • Page 37 SECTION 4 COMMISSIONING USERS For your safety read before lighting the appliance SAFETY WARNING GUIDE 1. Always follow manufacturers instructions when lighting the appliance. Failure to so may result in damage to property, personal injury or loss of life. 2. Before lighting check all round the appliance area for gas. Be sure to check at low level because some gas (i.e.

  • Page 38: Standard Range

    This is known as stacking. To counter this condition, an upper thermostat phial is fitted (not on Model 32/143) which senses abnormally hot water and shuts down the main burner until the water cools. Most modern commercial pipe installations include a circulating pump which keeps hot water moving continuously throughout the heater.

  • Page 39: Servicing

    SECTION 6 SERVICING INTRODUCTION Servicing must be carried out by a properly qualified person. Whilst giving these instructions for the care of the Heater, it is recommended that checks are carried out by the installer or local gas authority, at least annually. Ensure good ventilation by keeping the heater free of extraneous materials and clear of dust and lint.

  • Page 40: Gas Control Valve Standard Range

    SERVICING SECTION 6 8. Re-assemble in reverse order but note: i) The flueways and combustion chamber must be cleaned first. ii) Use an approved jointing compound when re-fitting burner injectors. 9. Light heater in accordance with lighting instructions. All gas joints must be checked using leak detection fluid.

  • Page 41: Cleaning The Storage Vessel

    SECTION 6 SERVICING CLEANING THE The storage vessel should be checked and cleaned annually. Scale formation in the base of the vessel may occur, particularly in hard water areas and is STORAGE normally associated with high usage and high water temperatures. It is characterised by a VESSEL rumbling noise when the main burner is lit.

  • Page 42: Replacing Components, Hi-Flo Range

    The gas valve must be fitted so that it is square relative to the centre line of the injectors. 8. Re-commission the heater as detailed in Section 4, Commissioning. NOTE! These instructions apply to all models but Model 32/143 is not fitted with a limit USER- sensor phial.

  • Page 43: Burner

    SECTION 7 REPLACING COMPONENTS, Hi-Flo RANGE THERMOPILE/ 2. Disconnect thermopile and pilot supply pipe from gas control valve. 3. Remove two screws and withdraw burner assembly. PILOT 4. Remove two screws and withdraw pilot assembly. BURNER/PILOT 5. Unscrew gland nut securing thermopile to it's bracket and withdraw. RESTRICTOR 6.

  • Page 44: Fault Finding

    FAULT FINDING SECTION 8 PERMANENT FAULT ACTION PILOT MODELS STANDARD AND WATER DOES (a) Check gas service cock is open. HI-FLO RANGES NOT GET HOT (b) Check water valves are open (c) Check pilot is alight (d) Check thermostat setting. reset to higher temperature) (e) Check gas pressures at burner and at gas inlet to appliance.

  • Page 45: All Models

    SECTION 8 FAULT FINDING ALL MODELS FAULT ACTION HEATER SOOTING, (a) Check gas burner pressure and injector size. If possible, YELLOW FLAME check heat input with meter and watch. (POOR COMBUSTION) (b) Clean burners and injectors. (c) Flue obstruction. Clean flue ways. (d) Check flue design and termination position.
  • Page 46 FAULT FINDING SECTION 8 AUTO FAULT ACTION IGNITION UNITS (a) Check gas service cock is open. IGNITION AT PILOT (b) Electrical ON/OFF switch is not ON. STANDARD (c) Power to unit interrupted. RANGE (d) Thermostat set too low. (e) Check ECO for failure. Reset. (f) Check for 24V AC at intermittent pilot ignition control terminal No.
  • Page 47 SECTION 9 PARTS LIST AND ILLUSTRATIONS 63/62 only STANDARD Models 24/29, 32/40, 40/61, 63/62 63/62 only STANDARD Model 84/87...
  • Page 48 PARTS LIST AND ILLUSTRATIONS SECTION 9 STANDARD MODELS 24/39 32/40 40/61 63/62 84/87 Model Ref. Part Numbers Description C654 C654 C654 C657 C657 Adaptor Ring C653 C653 C655 C656 C658 Draught Diverter C285 C285 C285 C285 C690 Hot Outlet Nipple C286 C292 C293...
  • Page 49 SECTION 9 PARTS LIST AND ILLUSTRATIONS Hi-Flo Model 32/143 Hi-Flo Models 65/173 and 81/264...
  • Page 50 PARTS LIST AND ILLUSTRATIONS SECTION 9 HI-FLO MODELS Model 32/143 65/173 81/264 Ref. Part Numbers Description E023 C500 C501 Draught Divider C333 C333 C333 Service Magnesium Anode C334 C334 Flue Connector, 150mm, BS 835 C432 Flue Connector, 200mm, BS 835...
  • Page 51 SECTION 9 PARTS LIST AND ILLUSTRATIONS Hi-Flo Models 62/341 and 54/418/440...
  • Page 52 Drain Cock, BS 2879, 3/4" C103 C103 Socket Coupler, 3/4" C474 C473/C492 Data Badge C543 Flue Baffle C543 Flue Baffle C235 C235 Andrews Label C487 C554 Top Cover C488 C488 Insulation Pad C490 E392 Flue Box Top Cover C299 C299 Cleanout Pad Seal...

  • Page 53: Standard Range

    SECTION 9 PARTS LIST AND ILLUSTRATIONS Unvented Systems Kit - Standard Range Unvented Systems Kit - Hi-Flo Range...
  • Page 54 PARTS LIST AND ILLUSTRATIONS SECTION 9 Unvented Ref. Part No. Description Systems Kit - B171 Unvented Systems Kit Complete Standard Range C780 Pressure Reducing Valve/Strainer C781 Check Valve / Expansion Valve C782 Expansion Vessel E462 Temperature/Pressure Relief Valve C783 Tundish C772 Adaptor B173...
  • Page 55 SECTION 9 PARTS LIST AND ILLUSTRATIONS 24 Volt Auto System Kit B217 24 Volt Auto System Kit B258...
  • Page 56 HT Lead 24” 24 Volt Auto Part No. Description System Kit Hi-Flo Range E839 Pilot assembly C521 On/Off Switch C531 Label - Andrews C644 Label - Warning C989 Label - On/Off Label - Wiring Z090 Gas Control Valve r i c...
  • Page 57 NOTES...
  • Page 58 Sales: Baxi Commercial Division 0845 070 1056 Wood Lane, Erdington, Birmingham B24 9QP Technical: Email: andrews@baxigroup.com 0845 070 1057 www.andrewswaterheaters.co.uk...

This manual is also suitable for:

81/26463/17362/34154/41854/44024/39 ... Show all

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