Technical information
28
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 in-line terminal fitting i.e. tap.
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Ensure that all thermostats adjusted for the correct temperature setting, this
should be between 60 and 65°C.
After servicing, complete Benchmark Service Record located on page 35 of
this manual.
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By removing the immersion heater, the internal of the cylinder can be
inspected when required.