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Maintenance and Service

Exam revision materials for Plumbing Level 2&3 and ACS Gas Safety test

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Boilers

Vokera

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Vokera Syntesi 29e - Non-return valve 10023569 replacement

Vokera Syntesi 29e - pressure is low and a filling loop doesn't work to top up the pressure

  • Isolate a cold water supply to the boiler
  • Unscrew the non-return valve and check if there any debris are blocking it
  • Clear the debris
  • If necessary replace the check valve
  • The part number is Vokera Non Return Valve 10023569
< Go Back2014-07-06

Vokera Sabre 25HE - Boiler quickly loosing pressure

The boiler keeps loosing pressure up to 0 within 3 hours.

Boiler manual in PDF

Pressure relief valve (PRV) is letting by. How to check? Top up the pressure up to 1 bar by opening a filling loop and then have a look at the pressure discharge pipe termination if its dripping or not. If its dripping with pressure gauge readings up to 3 bars then the PRV need replacement. The part number is 10025055 and you can order it here.

Expansion vessel has lost its charge or diaphragm has split. How to check? Find the expansion vessel at the back of the boiler and push a nipple down. If there is a water coming instead of air then the expansion vessel need replacement. Due to incontinent design of this model its easier to fit an external expansion vessel 8 litres. Undercharged expansion vessel can be checked by turning the heating on and observing the pressure - it should shoot up to 3 bars and PRV starts discharging excessive water.

Its also worth to check a radiator valves for leaks - its a very common reason.

< Go Back2013-01-17