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12 INSPECTION AND MAINTENANCE
12.1 General
The boiler requires inspection at least once every 12 months.
As a rule of thumb, inspection/maintenance is to be carried out when the boiler generates a number of similar
error codes.
12.2 Inspection (Items J K L Major Service)
An inspection should cover at least the following matters.
a.
Ask the user about any problems with the CH boiler and/or any comments.
b.
Check the system (water) pressure.
c.
Remove the casing of the boiler and check all lines and connections for traces of water and water
leakage.
d.
Inspect the top of the casing and/or the top of the boiler for water leakage or traces of water from the air
supply pipe or the de-aerator.
e.
Open the condense siphon and remove any dirt.
f.
If a laptop computer is available, connect this computer and check the service page for error messages,
starts and failed / successful starting attempts.
g.
Fire the boiler on maximum output, and measure the output and the CO2 percentage.(CO on LPG)
h.
Fire the boiler on minimum output, and measure the output and the CO2 percentage.(CO on LPG)
i.
Note the noise of the CH pump and the fan.
j.
Dismantle the burner unit: remove the 6 x M6 nuts and the ignition cable, and move the burner unit
forward. Remove the plug of the fan cable to the fan when the burner has been pulled half-way from the
combustion chamber Check the inside of the heat exchanger.
k.
Dismantle the air gas mixing box on the suction side of the fan and check the fan blades.
l.
Check the distance from the electrode to the burner; there should be 4 to 5 mm gap.
Figure 3; Distance from electrode to burner S-CB
