INSTALLATION
20
Mexico Slimline CF440 -
Installation & Servicing
25 INITIAL LIGHTING
Mex 2259
G
A
C
D
B
H
J
F
E
LEGEND
A
Gas control valve.
B
Burner pressure test point.
C
Main burner pressure adjuster.
D
Inlet pressure test point.
E
Gas service cock.
F
Sightglass.
G
Boiler On neon.
H
Boiler thermostat knob.
J
Overheat thermostat reset
button (optional)
TO LIGHT THE BOILER
1.
Check that all the drain cocks are closed and any valves in
the flow and return are open.
2.
Check that the gas service cock (E) is OPEN and the
boiler mains on/off switch is OFF.
3.
Slacken the screw in the burner pressure test point (B)
and connect a gas pressure gauge via a flexible tube.
4.
Switch the electricity supply ON and check that all external
controls are calling for heat.
5.
Set the boiler thermostat knob (G) to position 6. The pilot
solenoid valve should open and the intermittent spark
commence, continuing until the pilot is established. The
main burner will then cross-light smoothly. If this
sequence does not occur, refer to the Fault Finding
section.
6.
Test for gas soundness around ALL boiler gas
components using leak detection fluid.
7.
Operate the boiler for 10 minutes to stabilise the burner
temperature.
8.
The boiler is preset at the factory. If the burner setting
requires adjustment remove the sealing cap and turn the
adjusting screw clockwise to increase; anticlockwise to
decrease the pressure until the required burner pressure
is achieved. Refer to Table 2, page 2. Refit the sealing cap.
9.
Immediately check that there is no spillage of combustion
products from the draught diverter outlets by carrying out a
spillage test, as detailed in BS.5440-1:2000.
10.
Set the boiler mains on/off switch to OFF.
11.
Remove the pressure gauge and tube. Retighten the
sealing screw in the pressure test point.
12.
Turn ON and check for gas soundness at the pressure test
point.
13.
Refit the grille and lower front panel, and secure with the
fixing screws.
INST
ALLA
TION
200946-1.p65
3/9/2004, 3:30 PM
20
