Always disconnect from electrical supply BEFORE any work is carried out. Release pump pressure before undoing any pipe work. *NOTE: For protection, the Davey pump motor is fitted with an automatic reset thermal overload, constant tripping of this overload indicates a problem e.g. low voltage at pump, excessive temperature (above 50°C) in pump enclosure.
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HS SERIES MULTISTAGE PUMP ASSEMBLY Fit the ceramic wear face to the stainless steel backplate using a little water on the rubber boot. Ensure that it is square and pushed all the way into the backplate. Put the slinger onto the motor shaft and press it all the way down to the drive endshield.
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HS SERIES MULTISTAGE PUMP ASSEMBLY Fit the last stage body. This is the one with the exit slots in it and continue to build with the next impeller and wear ring. There are no clearances or spacers to worry about as the impeller has the spacer inbuilt to minimise the number of components in the pump.
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14. Your pump is now ready for water testing. 15. The Davey HS casing design allows for the motor to be fitted at 90 degrees to the outlet port to cater for wall mounting of the motor. The outlet port and first stage...
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HS SERIES MULTISTAGE PUMP DISASSEMBLY Disconnect the power supply and release the pump pressure before removing the pump to do any repairs. Remove the eight casing screws with a 5mm allen key turning anti-clockwise. Sit the pump on the fan cowl for easier removal of the screws.
TROUBLE SHOOTING Pump not delivering water or not building up pressure May be caused by one or more of the following : Pump not properly primed Foot valve leaking on suction lift Suction lift too high Suction piping not correctly sealed or holed allowing air to enter pump suction Blocked or worn impellers Insufficient water supply source Reverse rotation...
TROUBLE SHOOTING CONTINUED... AUTOMATIC SYSTEMS Pump switching on and off frequently when no taps are turned on May be caused by one or more of the following : Leaking footvalve or in-line checkvalve Water leaking from suction or delivery piping Ball valve in toilet cistern, hot water system, or stock troughs allowing unit to overflow Pressure tank not retaining air pressure or air change too high (pressure...