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Andrews FASTflo WH42 Installation Manual, Operation And Maintenance 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 E791
FASTflo
Installation Guide, Operation and Maintenance Manual
Continuous Flow Wall Hung Balanced Flue
Water Heaters for Natural Gas and LPG
WH42, WH56, LWH42, LWH56
Working towards
a cleaner future
( internal )
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 E791 FASTflo ( internal ) Installation Guide, Operation and Maintenance Manual Continuous Flow Wall Hung Balanced Flue Water Heaters for Natural Gas and LPG WH42, WH56, LWH42, 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

    CONTENTS PAGE GENERAL AND SAFETY INFORMATION SECTION 1 INCLUDED ACCESSORIES SECTION 2 QUICK CONNECT MULTI SYSTEM INSTALLATION SECTION 3 BEFORE INSTALLATION SECTION 4 CHOOSING INSTALLATION SITE SECTION 5 INSTALLATION CLEARANCES SECTION 6 INSTALLATION SECTION 7 FLUE PIPE INSTALLATION (External) SECTION 8 GAS PIPING SECTION 9 WATER PIPING...
  • Page 4: General And Safety Information

    GENERAL SAFETY INFORMATION Installation Manual GAS WATER HEATER WH42, LWH42 (Internal) WH56, LWH56 (Internal) WARNING: If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury or death. Potential dangers from accidents during installation and use are divided into the following three categories.
  • Page 5: Included Accessories

    INCLUDED ACCESSORIES The following accessories are included with the unit. Included Accessories Check for any missing items before starting installation. Part Shape Part Shape Q’ty Q’ty Installation Manual Owner's Guide (this document) Drain hose Crescent clamp Tapping Screw...
  • Page 6: Quick Connect Multi System Installation

    QUICK CONNECT MULTI SYSTEM INSTALLATION Quick Connect Multi System Installation • The Quick Connect Multi System allows the installation of two units together utilizing only the Quick Connect Cord. The Quick Connect Cord is 2m. long. Install the two units 470mm-950mm apart at the center to ensure the cord will be able to reach between the units.
  • Page 7: Before Installation

    BEFORE INSTALLATION Before Installation Caution Check the Gas • Check that the rating plate indicates the correct type of gas. Check that the gas supply line is sized for 62.3 kW(or 49.0 kW) for this unit. Check the Power • The power supply required is 230V AC, at 50Hz.
  • Page 8: Choosing Installation Site

    CHOOSING AN INSTALLATION SITE Choosing Installation Site The appliance must be installed in a suitably ventilated room, in accordance with the regulatins in force. * Locate the appliance in an area where leakage from the unit or connections will not result in damage to the area adjacent to the appliance or to the lower floors of the structure.
  • Page 9: Installation Clearances

    INSTALLATION CLEARANCES Installation Clearances Caution Before installing, check for the following: The appliance must be installed in a suitably ventilated room, in accordance with the regulations in force. Install in accordance with relevant building and mechanical codes, as well as any local, state or national regulations.
  • Page 10: Installation

    INSTALLATION Installation Securing to the wall • The weight of the device will be applied to the wall. If the strength of the wall is not suffi- cient, reinforcement must be done to prevent the transfer of vibration. • Do not drop or apply unnecessary force to the device when installing. Internal parts may be damaged and may become highly dangerous.
  • Page 11: Flue Pipe Installation (external)

    FLUE PIPE INSTALLATION Flue Pipe Installation (Internal Installation Only) Flue Terminal Installation • Follow the installation instructions included with the flue terminal and which are reproduced at the end of this manual. This appliance must be the flue through the wall, not vertically to the roof. Flue Terminal Installation Precautions Note the following flue terminal installation requirements •...
  • Page 12 Note: An adapter is always required on top of the heater. For the vertical flue set up, offset adapter will be supplied for the air intake. a) The flue system must be constructed using only ANDREWS WATER HEATERS approved components.
  • Page 13 FLUE PIPE INSTALLATION Installing Horizontal Extended Terminal Important: The flue terminal must be installed horizontally. 1. Mark the centre of the 152mm diameter hole and core drill. Note: If the wall is clad with a combustible material an additional 25mm wide area must be removed around liner.
  • Page 14 • If the flue terminal will be installed higher than • If possible, don’t install the flue pipe through any the water heater, make the vertical section di- enclosed areas.If necessary,consult ANDREWS rectly above the water heater as short as WATER HEATER for clearances.
  • Page 15 • If the flue terminal will be installed higher than any enclosed areas. If necessary, consult the water heater,make the vertical section di- ANDREWS WATER HEATER for clearances. rectly above the water heater as short as • Install the flue terminal so that all exhaust is possible,and slope down to the terminal.
  • Page 16 If a terminal guard is required, it must be positioned to provide minimum of 50 mm clearance from any part of the terminal and be central over the terminal. Description:Flue Outlet Guard Andrews Part Number:E105 Manufactured by:H.Docherty Limited Red Shute Hill Industrial Estate...
  • Page 17: Gas Piping

    GAS PIPING Gas Piping Follow the instructions from the gas supplier. The appliance and its individual shutoff valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 35 mbar. The Appliance must be isolated from the gas supply piping system by closing its individual manual shutoff valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 35 mbar.
  • Page 18: Water Piping

    If the water heater is installed in a closed water supply system, such as one having a backflow preventer in the cold water supply line, means shall be provided to control thermal expansion. Contact ANDREWS WATER HEATERS TECHNICAL DEPARTMENT FOR ADVICE.
  • Page 19: Electrical Wiring

    ELECTRICAL WIRING Consult a qualified electrician Electrical Wiring for the electrical work. Do not connect electrical power to the unit until all electrical wiring has been completed. i) "A means of disconnection from the supply mains having a contact separation in all poles must be pro- vided to allow for full disconnection".
  • Page 20: Remote Controller

    ELECTRICAL WIRING Remote Controller • Applicable Model WH42, LWH42, WH56, LWH56 Remote controller Main RC-7508M The remote controller must be installed in accordance with the installation manual enclosed in the • package. Connecting Remote Controller Cord to Unit • Keep the remote controller cord away from the freeze prevention heaters in the unit.
  • Page 21: Commissioning

    COMMISSIONING The installer should test operate the unit, explain to Commissioning the customer how to use the unit, and give the owner this manual before leaving the installation NOTE: The appliance has been factory set and no adjustment is necessary. •...
  • Page 22: Lighting Instructions

    COMMISSIONING Lighting Instructions This water heater does not have a pilot. It is equipped with an ignition device that automatically lights the burner. 1. Read the safety information in the installation manual or on the front of the water heater. 2.
  • Page 23: Dimensions

    DIMENSIONS Dimensions WH42, LWH42, WH56, LWH56 (unit: mm) (VIEW FROM TOP) GAS INLET (3/4) COLD WATER INLET (3/4") HOT WATER OUTLET (3/4) WIRING THROUGHWAYS AIR INLET FLUE COLLAR UPPER WALL MOUNT BRACKETS LOWER WALL MOUNT BRACKETS BOTTOM OF CASE BOTTOM OF CASE...
  • Page 24 DIMENSIONS Wiring Diagram ( WH42, LWH42, WH56, LWH56) (UN-USED) BURNER THERMISTOR (VACANT CONNECTOR) AIRFLOW CHANGE -OVER CONNECTOR (VACANT CONNECTOR) (Pulse) MAIN WATER (VCC) (GND) FLOW SENSOR <CN102> <CN63> <CN89> 1 2 3 4 1 2 3 4 (Pulse) BYPASS WATER FLOW...
  • Page 25: Remote Controller Installation

    REMOTE CONTROLLER INSTALLATION For Installers: Remote Controller Installation Manual Read this installation guide carefully before carrying out installation. Model Number: RC-7508M Note Do not connect power to the water heater before the remote controller has been properly installed. Included Accessories Part Shape Part...
  • Page 26: Servicing

    Do not use reconditioned or copy parts that have not been clearly authorised by Andrews Water Heaters. Before commencing with a service or replacement of parts the boiler should be isolated from the electrical supply and water supply and the gas supply should be turned off at the gas service cock.
  • Page 27 DISASSEMBLY (2) Remove the 2 locking screws of the transformer, then pull out. 2. Removing the electric board (1) Remove the locking screws at the top and bottom and ground screw, then pull board out. 3. Removing the manifold • Remove the electric board and fixing plate of the ground-fault circuit interrupter in advance.
  • Page 28 DISASSEMBLY (2) Remove the fasten terminal of the gas electromagnetic valve, then remove the 4 manifold locking screws. (3) Pull up and remove the manifold. 4. Removing the hot-water supply fan • Remove the electric board, manifold and intake gas pipe in advance. (1) Remove the 3 fan locking screws, then pull out.
  • Page 29 DISASSEMBLY (2) Pull out the fan motor. 5. Removing the gas electromagnetic valve block • Remove the electric board and manifold in advance. (1) Remove the gas electromagnetic valve locking screw. (2) Pull up the gas electromagnetic valve to the upper section and remove it.
  • Page 30 DISASSEMBLY 6. Removing the mixing tube block • Remove the electric board and connectors in advance. (1) Remove the locking screw of the intake water pipe and the locking quick fastener of water flow sensor set 3 of the heat exchanger, then pull out the intake water pipe.
  • Page 31 DISASSEMBLY (4) Pull up the mixing tube block to the upper section and remove it. 7. Removing the heat exchanger • Remove the electric board, manifold, mixing tube block and connectors in advance. (1) Remove the 3 locking screws at the bottom of the burner case.
  • Page 32: Servicing Parts List

    SERVICING PARTS LIST Servicing parts lists External outfitting WH42, LWH42, WH56, LWH56...
  • Page 33 SERVICING PARTS LIST External outfitting WH42, LWH42, WH56, LWH56 Part Nos. Part Names Order Nos. Q'ty/unit WH56AD Front set-AS SKA7263 Front packing S AAPL015 Front packing L AAPL017 Lamp seal plate DECK008 Piping label EDMK004 Heat insulator CZVL002 Intake pipe...
  • Page 34 SERVICING PARTS LIST Combustion unit and gas route WH42, LWH42, WH56, LWH56 For LWH42 For LWH56...
  • Page 35 SERVICING PARTS LIST Combustion unit and gas route WH42, LWH42, WH56, LWH56 Part Nos. Part Names Order Nos. Q'ty/unit Combustion tube set EAC SET-V SBP7302 Flame rod DLK SET-V SBA7506 Plug packing(for N) DLK DLKL012 Ignition plug Q(N)SET-V SBA7504 Burner sensor DLK SET-V...
  • Page 36 SERVICING PARTS LIST Hot-water feed route WH42, LWH42, WH56, LWH56...
  • Page 37 SERVICING PARTS LIST Hot-water feed route WH42, LWH42, WH56, LWH56 (Thermal fuse rounding procedure) (Left side view) (Front side view) (Right side view) (Rear side view) Freeze preventive heater Thermal fuse fastener Thermal fuse 1.Beginning of roll Thermal fuse fastener...
  • Page 38 SERVICING PARTS LIST Hot-water feed route WH42, LWH42, WH56, LWH56 Part Nos. Part Names Order Nos. Q'ty/unit Heat exchanger EJM SET-AS SKA7139 Thermal fuse DHN SET-V SBA7398 Thermal fuse fastener CXDH003 Thermal fuse cover DHNA014 Freeze preventive heater Q DJW SET-V...
  • Page 39 SERVICING PARTS LIST Electronic control unit WH42, LWH42, WH56, LWH56...
  • Page 40 SERVICING PARTS LIST Electronic control unit WH42, LWH42, WH56, LWH56 Part Nos. Part Names Order Nos. Q’ty/unit Relay case ELE-A SET-AS SHA7850 Harness AD ELEJ031 Lamp cable conduit CRPJ014 Relay case cover DEKA014 Mounting plate for terminal block DZTA006 Current leakage safety device 240 EJS...
  • Page 41: Owner's Guide

    SERVICING PARTS LIST Remote controller and Attached set WH42, LWH42, WH56, LWH56 Optional Accessories Remote controller (RC-7508M) Attached set <Special part> Special part Special part no. Owner's Guide installation manual...
  • Page 42: Crescent Clamp

    SERVICING PARTS LIST Remote controller and Attached set WH42, LWH42, WH56, LWH56 Part Nos. Part Names Order Nos. Q'ty/unit RC-7508M Body AD(SE) QPA QPAJ013 M Dressed frame body AD(SE) QPAA013 Oar plug 6X25 6339000 Cross recessed flat-head screw M4X35 SHB6879 Cross recessed flat-head wood screw (All screw)4.1X20...
  • Page 43: Specifications

    SPECIFICATIONS Specifications Specification Item Model Name WH42 LWH42 Type Installation Internal, Wall Hanging Air Supply/Exhaust Power Flue 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)
  • Page 44 SPECIFICATIONS Specifications Item Specification Model Name WH56 LWH56 Type Installation Internal, Wall Hanging Air Supply/Exhaust Power Flue 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 29 kg Water Holding Capacity...
  • Page 48 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:

Fastflo wh56Fastflo lwh42Fastflo lwh56

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