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Unvented Controls(s)
Check controls as per the following:
1)Line strainer - with the water supply turned off remove screen from strainer and clean of any detritus;
2)Expansion vessel - with the water supply turned off and taps open, check expansion vessel pressure and top up as necessary;
3)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);
4)Expansion relief valve - check manually by turning the test knob (ensure valve closes after testing);
5)Discharge pipes (D1) - from both temperature & pressure relief and expansion relief valve for obstructions;
6)Tundish & discharge pipe (D2) - open either valve gradually to produce a full bore discharge into tundish and D2 without any back pressure;
7)Pressure reducing valve - check that the correct outlet pressure is being maintained by recording the pressure at an
Thermostats
Ensure that all thermostats adjusted for the correct temperature setting, this should be between 60 and 65°C.
NOTE!
WHERE THERE IS A POSSIBILITY OF SCALE FORMING, IT IS RECOMMENDED TO ADJUST
THE THERMOSTAT TO BELOW 60OC
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