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Hamworthy Weymouth Series Installation, Commissioning And Servicing Instructions
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HAMWORTHY HEATING LTD14WEYMOUTH 500001112/C10.0 SERVICING AND REPLACEMENT OF COMPONENTSNote! When servicing or replacing Weymouth components electrically isolate the unit and close the system andexpansion vessel isolating valves. The Advanced unit should also be isolated from the pressure alarm circuits.When remaking screwed connections use a thread sealant .The cover on the Standard unit is secured by one screw at the lower edge of the front panel and one screw on thetop panel. The cover on the Advanced unit is secured by one screw at the lower edge of the front panel only.10.1 Hamworthy Heating Recommended SparesStandard Spares Advanced SparesPart Part N° Part Part N°Pump Assembly 530905046 Pump Assembly 530905045Float Valve Assembly 531911037 Float Valve Assembly 531911038Pressure Gauge 557002009 Pressure Gauge 557002009Pressure Switch Assembly 533925005 Pressure Switch Assembly 533925005Non-return valve cartridge 531911039 Non-return valve cartridge 531911040NOTE! For any service/replacement parts the unit serial No. (on the Data Plate inside the unit) MUST bequoted. For service or spares contacts please refer to the inside front cover of this guide.10.2 Standard Pump Removal Figure 19 Pump FittingsHamworthy part n° 530905046Pump Removal Sequence1) Isolate the water supply from the unit.2) Empty the unit’s header tank.3) Once clear of water undo the bulkhead fitting (fig 19,1),4) Undo the down pipe fitting (fig 19,2)5) Unscrew the 2 pump assembly mounting screws (fig 19,3).6) Once the pump assembly has been removed from theunit the pump can easily be removed from the assembly.The wiring terminals are inside the box on the top on the pump. The wiring layout can be found on the wiringdiagram in the appendix and on Figure 20 below.Figure 20 Standard Pump Wiring Terminals |
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