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Andrews FASTflo WH42 Installation Design Manual

Continuous flow wall hung balanced water heater.
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INSTALLATION DESIGN GUIDE
Part number E835
WH42, WH56, WHX56, LWH56, WHX56, LWHX56, WHC56, LWHC56
Please read and understand these instructions before commencing installation and leave this manual with the customer for future reference.
Andrews. Built to perform.

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Table of Contents

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  • Page 1 INSTALLATION DESIGN GUIDE Part number E835 WH42, WH56, WHX56, LWH56, WHX56, LWHX56, WHC56, LWHC56 Please read and understand these instructions before commencing installation and leave this manual with the customer for future reference. Andrews. Built to perform.
  • 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 Contents FASTflo Installation design guide for WH and WHX model water heaters Installations WH and WHX single water heater installation without secondary return WH and WHX single water heater installation with secondary return WH and WHX multiple water heater installation without secondary return WH and WHX multiple water heater installation with quick connect cord kit WH and WHX multiple water heater installation with secondary return WH56 and WHX56 multiple water heater installation with system controlller kit...
  • Page 4: Installations

    1. Stop Cock 2. Strainer Bronze secondary return pump 3. Pressure reducing valve 4. Non return valve 5. Expansion vessel Hot Outlets 6. Expansion valve + tundish 7. Andrews bronze pump c/w ball valve unions (part no. B249) Draft A 18/07/16...
  • Page 5: Wh And Whx Multiple Water Heater Installation Without Secondary Return

    Installations WH and WHX multiple water heater installation without secondary return Remote controller kit Fig. 3 (part no. B285) Gas Rate for NG Units WH42 - 5.1 m Please refer to the FASTflo WH56, WHX56 - 6.5 m specification sheet and flue selection guide for flue kit and Gas Rate for Propane Units termination details.
  • Page 6: Wh And Whx Multiple Water Heater Installation With Secondary Return

    4. Non return valve LWH42 - 1.9 m 5. Expansion vessel LWH56, LWHX56 - 2.5 m 6. Expansion valve + tundish 7. Andrews bronze pump Dynamic Pressure c/w ball valve unions NG 20 mbar (part no. B249) Propane 37 mbar...
  • Page 7: Wh And Whx Single Water Heater Installation With St Range Storage Cylinder

    HWS flow 4. Non return valve 5. Expansion vessel 6. Expansion valve + tundish Gas Rate for NG Units 7. Andrews bronze pump c/w ball valve unions (part no. WH42 - 5.1 m Pump B249) Storage WH56, WHX56 - 6.5 m 8.
  • Page 8: Water Flow Rates

    Water flow rates Water Flow Rates WH and WHX water flow rates Fig. 9 Performance Chart Andrews Model Temperature Temperature Temperature Temperature Temperature Temperature Reference Rise 25°C Rise 35°C Rise 45°C Rise 55°C Rise 65°C Rise 75°C Water flow L sec L min...
  • Page 9: Controller Kit

    Controller kit Controller kit System controller kit (part No. B287) for WH56, LWH56 and WHX56 The System Controller Kit can be used as an alternative to the Quick Connect Cord Kit (two unit installation) or for controlling up to six manifolded water heaters. The master unit (No.1) contains the System Controller module and includes plug connectors to enable the control cords from the other units to be connected up to the master unit.
  • Page 10 Draft A 18/07/16...
  • Page 11 © Copyright All technical and technological information contained in these technical instructions, as well as any drawings and technical descriptions supplied, remain our property and shall not be multiplied without our prior consent in writing. Subject to alterations.
  • Page 12 Technical 0345 070 1057 0345 070 1057 0345 070 1057 ICOM ICOM Website ebsite Energy Association Energy Association andrewswaterheaters.co.uk andrewswaterheaters.co.uk Twitter T T witter witter @AndrewsWH @AndrewsWH Andrews. Built to perform. Andrews. Built to pe Andrews. Built to pe form.

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