601
20
fig. 21
8.5 To Light the Boiler (fig. 21)
a. Open controls panel door.
b. Switch on electricity supply.
c. Adjust room thermostat and all external controls to «ON». Check operation of pump.
d. Turn the boiler thermostat to maximum. Fan will run (A waiting time of max 3 minutes before fan will
run is possible!). Wait 20 seconds after fan starts to run at full speed.
e. Depress the gas control knob fully (this should operate the electronic ignitor). When the pilot
flame is seen to light through the pilot viewing window, keep the control knob fully depressed for a
further 15 seconds, then release.
Should the pilot fail to remain alight (or goes out on any other occasion i.e. if electricity
supply as been
turned off) wait 3 minutes and repeat. Should the pilot still fail to remain alight, refer to the
fault finding section.
f. With the pilot burner established, observe that the main burners cross-light smoothly.
g. Temporarily turn off by switching off electricity supply.
Important Note: If the burner stops for C.H. only after a waiting time of 3 minutes will the boiler light again!
Pilot viewing
opening
C.H. pressure gauge
C.H. boiler thermostat
Gas valve
control knob
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