Setting The Gas Pressure - Cannon Canterbury Instruction Manual

setting the gas Pressure

1. gas valve layout is as indicated in FIG 27.
Pressures for 'burner high flame' and 'burner low
flame' are factory set, however if pressures need to be
checked or adjusted follow the procedures described
below. to check outlet pressure at burner 'high flame'
and 'low flame' positions remove the plastic cap from
the regulatior adjustment location as indicated
in FIG 28.
2. the pressure point is closed with a captive screw. turn
screw 6 revolutions anticlockwise to open the pressure
point as indicated on FIG 29 (a) and place manometer
tube over the test point as per FIG 30 (b).
3. Switch the control buttons to 'High flame' position.
Wait for heater to switch to 'High' setting (time delay
on start up). retain screwdriver in position and using
a spanner adjust the outer nut on the control to give a
pressure reading of 0.75 kPa for natural gas and 2.65
kPa for lPg. (Turn clockwise to increase pressure
and anticlockwise to decrease pressure).
refer FIG 30.
4. Switch the control buttons to 'low flame' position.
retain spanner in position and using a screwdriver
adjust the central screw control to give a pressure
reading of 0.4 kPa for natural gas and 1.1 kPa for
lPg. (Turn clockwise to increase pressure and
anticlockwise to decrease pressure).
refer FIG 31.
5. remove spanner and screwdriver. Switch from high to
low to ensure settings are correct.
6. Switch heater off and remove the manometer
tube. tighten pressure test point by
turning the captive screw fully clockwise.
7. replace plastic cap. ensure the little lug is positioned
towards lower right hand side to clear the controls.
8. refit the fascia, making sure not to damage the power
cord or switch cable.
9. Operate the heater on HIgH, MeDIuM and lOW
settings. the flame should be stable, no lifting from the
burner and the logs should glow after approximately
15 minutes of operation on HIgH setting.
If the flame is unstable:
• Check that the burner is located correctly.
• C heck that the glass front is located correctly and is
against the sealing rope.
• Check that the gas pressure is correctly adjusted
• Check that flue is operating correctly
If the heater still does not operate to specification refer
to the troubleshooting chart on page 19, or contact
Sampford IXl in your state.
14 | Cannon Fitzroy / Canterbury Inbuilt
Pressure test point
with captive screw
Pressure adjust-
ment (burner 'High
Flame')
fig 27
fig 28
(a)
fig 29
fig 30
fig 31
burner adjust-
ment (burner
'low flame')
Plastic Cap
(b)
adjust
hold
hold
adjust