page no. 37 of 68
CPx Range Users, Installation & Servicing Instructions Doc Ref M201 issue 2.9 Nov 2018.
3. Turn ON the main electricity supply and check that the
following sequence of events occur. i) Burner fan runs. ii)
Ignition spark is heard. iii) Main gas valves open and main
gas flame is established.
4. Check that the High Fire burner gas pressure agrees
with that stated on the heater data plate and in section
1.2. If necessary adjust the high fire burner gas pressure
by rotating the adjustment screw under the cover flap -
clockwise (+ positive), anticlockwise (- negative).
If the range of adjustment does not allow for setting of
the correct burner pressure the main volume regulator
may also be used. It is recommended that the main
governor adjustment is within 50% to 75% of its range.
Clockwise (- negative) anti-clockwise (- positive)
5. Check that the Low Fire burner gas pressure agrees
with that stated on the heater data plate and in section
1.2. If necessary adjust the low fire burner gas pressure
by rotating the adjustment wheel clockwise (- negative)
anti-clockwise (- positive)
iv) Burner goes to lockout as there is no gas supply.
4. Switch OFF main electricity supply.
1. Remove the burner cover by undoing the two screws
either side of the housing. (Gulliver burner shown)
1. Remove the sealing screw from the pressure test point
located on the bottom of the gas inlet to the burner head
and attach a pressure gauge. Remove the sample point
cover plug from the outlet flue length and insert a CO2
measuring instrument.
2. Check that the gas pressure switch on the side of the
gas valve is set to cut out below the minimum inlet gas
pressure (app. 15mbar)
