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Maintenance
Routine check (6 monthly intervals)
1. Check the pump produces the correct pressure.
2.
Check that the pump operates without undue noise or vibration.
3.
Check the break tank is clean and that the correct water level has been maintained.
4.
Check that all screws are tight on electrical components.
5.
Check that the earth connections are tight and making good contact.
6.
Check that the gas pre charge is at the correct pressure, this should be done by isolating the vessel from
the system and draining water out of the vessel via the isolation valve drain point.
once the water has been discharged, a tyre gauge can be connected to the pre charge valve to display the
vessel pre charge pressure. Recharge as necessary with Nitrogen or dry air.
Any other expansion vessels connected to the system can be checked in the same manner.
General fault finding guide
Fault
Pump fails to start
Pump fails to stop
Pump switches on and off
quickly
Pump runs but will not
make pressure
Pump overheating
Break tank overflowing
Pump stops and pressure
drops immediately
Possible Cause
Power supply failure
Isolator fuse blown/MCB tripped
Set point set too high
System pressure low due to large
leak in system
Air in system
Vessel pre-charge incorrect
Pump air locked
Commissioning valve left open
Passing too much water
Pump partially seized
Leaking ball valve
Non-return valve letting by
Non-return valve letting by
Vessel pre-charge incorrect
Lowara UK Limited
Millwey Rise Industrial Estate, Axminster, Devon EX13 5HU - UK
Tel: 01297 630230
e-mail: lowaraukenquiries@xyleminc.com
http://www.lowara.co.uk
Lowara is a trademark of Xylem Inc. or one of its subsidiaries.
Lowara reserve the right to make modifications without prior notice.
cod. UKLIT0092 P05/12
4
Remedy
Reinstate incoming power supply
Replace fuse/reset MCB
Lower set point
Switch unit off until leak is repaired
Purge air from pumps and pipework
Check vessel pre-charge and Charge as
necessary with Nitrogen or dry air
Vent pump
Check commissioning valves are in
correct position.
Check system for leaks
Remove pump and check for sediment
build up or foreign objects
Replace ball valve seal
Replace/clean non-return valve
Replace non-return valve
Check vessel pre-charge and Charge as
necessary with Nitrogen or dry air
Fax: 01297 630270
http://completewatersystems.com
© 2011 Xylem, Inc.
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