35
fig. 47
GW 419/0
fig. 48
GW 414/0
6.1 Initial Inspection
Before commencing any servicing or
maintenance work, carry out an initial
inspection of the system as follows:-
Inspect the flue, pipework and elec-
trical connections for indications of
damage or deterioration.
Inspect the air supply and ventilation
arrangements of the installation, en-
suring that the requirements of Section
3.5 are met.
Operate the boiler by turning the
maximum hot water temperature con-
trol (4, fig. 47) to `9' and fully open-
ing a hot water tap. Inspect the
burner operation through the viewing
window. Check that the flames are
burning evenly over the full surface of
the burner. Inspect for signs of excessi-
ve lifting or sooting.
Check the heating and hot water
system, in particular the condition of
the radiator valves, evidence of leak-
age from the heating system and
dripping hot water taps.
6.1.1 Functional checks of
operation using the built
in diagnostics
Refer to Section 5.11 for information
on using the diagnostic feature to per-
form functional checks on the boiler.
6.2 Routine maintenance
6.2.1 Turn off the boiler
(fig. 48)
•
Isolate the electrical supply to the
boiler
•
Turn off the gas service valve (1)
•
Turn off boiler CH service valves (2)
•
Turn off DHW cold water service
valve (3).
6.2.2 Remove front case
Remove bottom hinge screw (3, fig.
49) and pull the bottom door panel
forward and down to release it from
the top hinge pin (4, fig. 49).
Slide the top panel up to release re-
taining clips (1, fig. 50). Lift off top
panel.
