Water Heater Service - Olympic Way

Manufacturer installed

1. Twist of the expansion relief valve on inlet control set, allow water to for 5 seconds

2. Make sure valve reseats correctly

3. Repeat with the pressure/temperature relief valve

4. In both cases check that the discharge pipework is carrying the water away adequately. If not, check for blockages etc. an clear.

5. Check that any immersion heaters fitted are working correctly and that they are controlling the water at a temperature between 55 degrees celcius and 65 degrees celcius.

6. Check the pressure in the expansion vessel is charged to 3 bar. Turn off the water supply to the unit and open a hot tap first. The air valve on expansion vessel is a Schrader (car type) type. Air, nitrogen or carbon dioxide may be used to charge the expansion vessel.

7. Unscrew the head on the inlet control set and clean the mesh filter within (some water may escape).

8. Complete service record within manual.

1. Are anodes satisfactory (more than 10mm in diameter)

2. Line strainer - with the water supply turned off remove screen from strainer and clean of any detritus.

3. Expansion vessel - with the water supply turned off and taps open , check expansion vessel pressure and top up as necessary

4. Temperature & pressure relief valve - with the water supply turned on, check manually by lifting the test lever/turning the test knob (ensure valve closes after testing)

5. Expansion relief valve - check manually by turning the test knob (ensure valve closes after testing);

6. Discharge pipes (D1) - from both temperature & pressure relief and expansion relief valve for obstructions;

7. Tundish & discharge pipe (D2) - open either valve gradually to produce a full bore discharge into tundish and D2 without any back pressure;

8. Pressure reducing valve - check that the correct outlet pressure is being maintained by recording the pressure at an in-line terminal fitting i.e. tap.

Result