page no. 43 of 68
CPx Range Users, Installation & Servicing Instructions Doc Ref M201 issue 2.9 Nov 2018.
For adjustment and setting of gas valve, refer to section
2.6.5.1.3
Correct operational start-up
0s
Start of heat demand.
Burner begins the ignition cycle.
0s-4s
The burner is in stand-by.
4s-44s
Pre-purge with opened air damper
44s
Ignition 1st stage.
49s-69s
Ignition 2nd stage.
1. Remove the burner cover by undoing the two screws
either side of the housing.
Adjustment of the first and second stage air damper
position is carried out by setting the cam on the
servomotor.
2. Remove the plastic cover.
3. Use a flat-headed screwdriver to adjust the air damper
cam settings. This allows you to make small adjustments
to the air damper. As you turn the screw, the numbers
will rotate.
4. Read off numbers against the red line marker point
(indicated opposite)
FIRST STAGE ADJUSTMENT
By adjusting the micrometric screw, cam I regulates the
position of the 1st stage air damper (default value 25°).
SECOND STAGE ADJUSTMENT
Cam II regulates the position of the 2nd stage air damper
(factory setting reference value 50°, do not exceed 65°).
I
II
III
IV V
Head pressure is achieved by adjusting a screw which
moves a regulating rod. A test point on the burner casting
allows reading the air pressure in the combustion head.
5. Rotate the setting screw in a clockwise or anticlockwise
direction until set point marked on the regulating rod is
level with the outside plane of the head assembly.
Gulliver burners are manufactured to EN 676 standard
and fitted with a singular air pressure switch.
6. Turn the switch at the lowest setting. With the burner
working at the required output, adjust the dial clockwise,
increasing its value until the burner shuts down. Reduce
the value by one set point, turning the dial anti-clockwise.
7. Check for reliable burner operation, if the burner shuts
down, reduce the value by a half set point.
For adjustment and setting of gas valve, refer to section
2.6.5.1.3
