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Andrews FASTflo WH42 Owner's Manual

Continuous flow wall hung balanced flue water heaters for natural gas and lpg.
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This manual must be kept with the appliance
Part No E800
FASTflo
Owner's Guide
Continuous Flow Wall Hung Balanced Flue
Water Heaters for Natural Gas and LPG
WH42, WH56, WHX56, LWH42, LWHX56, LWH56
Working towards
a cleaner future
October 2010

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   Summary of Contents for andrews FASTflo WH42

  • Page 1 This manual must be kept with the appliance October 2010 Part No E800 FASTflo Owner’s Guide Continuous Flow Wall Hung Balanced Flue Water Heaters for Natural Gas and LPG WH42, WH56, WHX56, LWH42, LWHX56, LWH56 Working towards a cleaner future...
  • Page 2 The attention of 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

    OWNER’S GUIDE – CONTENTS PAGE General Safety Information General Parts Main Unit Names and Functions of Each Parts Initial Operation How to Use When using RC-7508M Clock Adjustment Running Hot Water Setting Hot Water Temperature Filling Up the Bath Confirmation Beeper On/Off Other Setting Options Preventing Damage from Freezing When Unused for an Extended Period...
  • Page 4: General Safety Information

    GENERAL SAFETY INFORMATION GENERAL AND SAFETY INFORMATION The Andrews Water Heater has been designed for use I/M2 Purging procedures for non-domestic gas with NATURAL GAS OR LPG and is manufactured to give installations. an efficient, reliable and long service life.
  • Page 5 Legionella bacteria. Based on data obtained through experiment, the Andrews These factors include stagnation, lukewarm conditions Water Heater can be described as legionella resistant as it (20°C to 45°C) and the accumulation of debris, scale and...
  • Page 6: Important Safety Information

    GENERAL SAFETY INFORMATION Important Safety Information-1 To prevent damage to property and injury to the user, the icons shown below will be used to warn of varying levels of danger. Every indication is critical to the safe operation of the water heater and must be understood and observed.
  • Page 7 Internal installation heater vent terminal 3. Turn off gas and water at the main External installation 4. Consult the nearest Andrews unit Water Heaters agent Check the temperature of the running hot water before entering the shower. Do not use combustible chemicals such as oil, gasoline, benzene etc.
  • Page 8 GENERAL SAFETY INFORMATION Caution Be sure to electrically ground the Do not touch the exhaust vent unit. pipe during or immediately after operation of the water heater. [Internal installation] Do not touch the power cord with wet hands. Keep power cord free of dust. [External installation] Do not use a broken or modified power cord.
  • Page 9 GENERAL SAFETY INFORMATION Important Safety Information Remark Do not drink water that has been inside the Do not use parts other than those specified unit for an extended period of time. Do not for this equipment. drink the first use of hot water from the unit in the morning.
  • Page 10: General Parts

    GENERAL PARTS General Parts Main Unit Internal Wall Mounted, Power Vent/Sealed Model WH56, LWH56, WH42, LWH42 Flue Collar Intake pipe Burner on indictor If there is a problem with the unit, a lamp will flash on the front of the unit. p.26) Front Cover Water Drain Valve (with Water Filter)
  • Page 11: Names And Functions Of Each Parts

    NAMES AND FUNCTIONS OF EACH PART Names and Functions of Each Part Main Remote Controller (RC-7508M) Power On/Off Button For turning the heater on and off. Display This page) Selection Button • Used to adjust the Set Button This page) temperature.
  • Page 12: Initial Operation

    INITIAL OPERATION Initial Operation Before the first use of your water heater, make the following preparations. 1 through 4 Follow steps Open the water supply valve. OPEN CLOSED Open a hot water fixture to confirm that water is available, and then close the fixture again.
  • Page 13: When Using Rc-7508m

    CLOCK ADJUSTMENT When using RC-7508M Clock Adjustment On this Display Operation Description * The is lit. ON/OFF Press the ON/OFF button to turn it “On”. Press the button to change the display until “time (Eg.: 40°C) set” is shown. * The time changes in 1-minute increments with each press on the Use the buttons...
  • Page 14: Running Hot Water

    RUNNING HOT WATER When using RC-7508M Running Hot Water On this Display Operation Description * The is lit. ON/OFF Press the ON/OFF button to turn it “On”. * This is lit during combustion. Check Turn on hot water. Here Previous set temperature (Display example) (Eg.: 40°C) Whenever using the hot water, such as when using the shower,...
  • Page 15: Setting Hot Water Temperature

    SETTING HOT WATER TEMPERATURE When using RC-7508M Setting Hot Water Temperature On this Display Operation Description * The is lit. ON/OFF Press the ON/OFF button to turn it “On”. Use the Here buttons to adjust (Eg.: 40°C) the temperature. While the shower is being used, no one other than the user WARNING should change the temperature, the power switch must not be turned “off”.
  • Page 16 SETTING HOT WATER TEMPERATURE Approximate hot water conditions 37 38 39 40 41 42 43 44 45 46 47 48 50 55 60 65 70 75 80 Set the maximum temperature to suit your own preference. ( P16 and 17) Washing Shower, hot water supply, etc.
  • Page 17: Filling Up The Bath

    FILLING UP THE BATH When using RC-7508M Filling Up the Bath On this Display Operation Description Preparation Insert the bathplug into the plughole. * The is lit. ON/OFF Press the ON/OFF button to turn it “On”. Check * Please set to the Turn on hot water.
  • Page 18: Confirmation Beeper On/off

    CONFIRMATION BEEPER When using RC-7508M Confirmation Beeper On/Off The remote controller will emit a sound when any button is pushed. This sound can be muted if it is desired. * Initial factory setting is with sound. Operation Description * Setting is possible regardless Press the button for about five ON/OFF...
  • Page 19: Other Setting Options

    OTHER SETTING OPTIONS When using RC-7508M Other Setting Options Switching Scroll display ( P8) can be switched scroll display on = “yes” or off = “no” . This is set to drain the unit. Draining the unit On this Display [Maximum tempera- [Draining the unit] [Scroll display]...
  • Page 20 OTHER SETTING OPTIONS Modification of the The maximum temperature setting can be maximum temperature modified. setting On this Display Operation q Press the ON/OFF button to “OFF”. w Press the button to show the settings screen. * This may not be displayed depending on the Press the button...
  • Page 21: Preventing Damage From Freezing

    Protect this plumbing with insulation. If you are still worried that your heater will freeze, contact the nearest Andrews Water Heaters agent. outside temperature including wind chill For severely cold temperatures of less than -10°C...
  • Page 22: When Unused For An Extended Period

    WHEN UNUSED FOR AN EXTENDED PERIOD When Unused for an Extended Period-1 If the water heater will not be used for a long period of time, drain the water. Whenever the unit is checked, maintained, or drained, the power CAUTION switch must be turned “Off”, and it must be allowed to cool down first.
  • Page 23 WHEN UNUSED FOR AN EXTENDED PERIOD When Unused for an Extended Period-2 If the water heater will not be used for a long period of time, drain the water. Position of the cleanout plugs 3 positions * The shapes of the cleanout plugs are as pictured on the right.
  • Page 24: Regular Maintenance

    REGULAR MAINTENANCE Regular Maintenance-1 Inspection (Once a month) Caution To avoid burns, wait until the equipment cools down before draining the water. The appliance will remain hot after it is turned off. High Temperature [External installation] [Internal installation] For dust and soot in the Check flue terminal.
  • Page 25 REGULAR MAINTENANCE Regular Maintenance-2 Maintenance (Once a month) Water Drain Valve (with Water Filter) If the water drain valve (with water filter) is covered with debris, the hot water may not run smoothly, or the unit may produce cold water. Check and clean the filter as explained below. * To avoid burns, wait until the equipment cools down before draining the water.
  • Page 26: Troubleshooting

    TROUBLESHOOTING Troubleshooting-1 Temperature • Are the gas and water supply valves fully open? Hot water is not available when the hot water fixture is opened. • Is the water supply cut off? • Is the hot water fixture sufficiently open? •...
  • Page 27: Amount Of Hot Water

    TROUBLESHOOTING Troubleshooting-2 Amount of hot water • When hot water is demanded at other fixtures, the The pressure at a certain fixture is not constant. amount available may be reduced. • Pressure fluctuations and other plumbing conditions can cause the temperature and pressure at a fixture to be unstable, but it should stabilize after a short time.
  • Page 28 TROUBLESHOOTING Sound • The fan runs for a while to accelerate ignition after the The fan can be heard after operation is stopped. operation button is turned on. Other • Are the gas and water supply valves fully open? The Heater stops burning during operation.
  • Page 29 Then, turn the power “On”, and when the hot water tap is turned on, it is back to normal if nothing is displayed. Fault occurs with combustion of Please contact Andrews Water Heaters. the unit. [Combustion lamp is lit. ( P7)] In the event of a failure, you are notified by the combustion lamp blinking at the front of the unit.
  • Page 30: Requesting Service

    For repairs after the warranty period, please contact your local Maintenance company. Minimum period of time for stocking repair parts Andrews Water Heaters will stock repair parts for this unit for a minimum of ten years after production has ceased.
  • Page 31: Specifications

    SPECIFICATIONS • Specifications may be changed without prior notice. Specifications-1 • The capacity may differ slightly, depending on the water pressure, water supply, piping conditions, and water temperature. Specifications Item Specification Model Name WH56 LWH56 Type Installation Internal, Wall Mounted Power Vented Air Supply/Exhaust Direct Ignition...
  • Page 32 SPECIFICATIONS Specifications Item Specification Model Name WHX56 LWHX56 Type Installation External, Wall Mounted Power Vented Air Supply/Exhaust Ignition Direct Ignition Minimum Pressure for Maximum flow 2.0 bar Minimum Flow Rate 2.5 L/min. Dimensions 61.5 cm(Height) x 46.4 cm(Width) x 24 cm(Depth) Weight 30 kg Water Holding Capacity...
  • Page 33 SPECIFICATIONS • Specifications may be changed without prior notice. Specifications-2 • The capacity may differ slightly, depending on the water pressure, water supply, piping conditions, and water temperature. Specifications Item Specification Model Name WH42 LWH42 Type Internal, Wall Mounted Installation Air Supply/Exhaust Power Vented Ignition...
  • Page 36 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...

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