INSTALLATION
20
Mexico Super CF495 - CF4140
-
Installation & Servicing
26 INITIAL LIGHTING
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
MEX 2137
G
Boiler thermostat knob
H
Burner On neon.
J
Overheat thermostat (optional) reset button.
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 will 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 to its nominal rating. If the
burner setting pressure 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.
Immmediately 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.
Note.
This must be done before any building in.
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.
INST
ALLA
TION
200944-1.p65
3/8/2004, 3:41 PM
20
