User manual

Page 39
INSPECTION AND MAINTENANCE
General
The boiler requires inspection at least once every 12 months. never use a steel brush during servicing
As a rule of thumb, inspection/maintenance is to be carried out also when the boiler generates a number of similar error
codes. If used 365 day 24 hr operation the boiler will need checking and servicing more often.
Inspection and Service also carry out Maintenance see next page
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. See 12.3. b & c
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 Replace the syphon if it is damaged if sound remove any dirt, thoroughly
flush the siphon and pipe work Re fill the syphon Dismantle the burner unit by removing 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 and replace if required the
rear and front insulation pads. Check all gaskets and replace when required
f. Use a hose to pour water into the heat exchanger do not wet the rear insulation pad. (the water will eventually
reach the siphon). Adjust the drain line up (if possible) allowing the water to flow to the drain of the boiler.
g. Check the distance from the electrode to the burner; there should be 4 to 5 mm gap.
h. Dismantle the air gas mixing box on the suction side of the fan and check the fan blades.
i. Check the service page for error messages, starts ups that failed / successful start up attempts.
j. After reassembly fire the boiler on maximum output, and measure the output and the CO₂ percentage.
k. Fire the boiler on minimum output, and measure the output and the CO₂ percentage.
l. Note the noise of the CH pump and the fan.
m. Check the heat exchanger for noise .
n. Never clean the burner itself - it is not required. If dirt has built up on the inside of the heat exchanger and/
or scale has formed on the inside of the stainless steel pipes, it should be removed using a non steel hard
brush and citric acid never use a steel brush! Always vacuum any dirt away.
Fig.3. - Distance from electrode to S-CB burner.