Burnham CHG225 - Manual (Page 50)

50
d) Remove the ignition electrode and inspect it for oxides. Clean the oxides off the electrode with
sandpaper. Inspect the ceramic insulator for cracks and replace the ignitor assembly as necessary.
e) Remove any accumulated debris from the air inlet screen.
f) Remove the attenuator hose and clean as necessary. (Note: The nylon cable tie used to hold the
attenuator hose in place is releasable.)
g) Remove the combustion fan/gas valve assembly and inspect the fan and fan blade for lint and dust.
Vacuum as required.
h) Remove the burner hood to access the burner and the chamber.
i) Check the burner and clean off any foreign material that may have accumulated. This can be done by
dusting with a soft bristle type brush or a vacuum cleaner. DO NOT USE A WIRE BRUSH TO CLEAN
THE BURNER. Check for corrosion of the burner and its parts. If there is evidence of corrosion or
deterioration, replace immediately.
j) With the burner removed, inspect the combustion chamber and clean as necessary.
k) Clean heat exchanger. Use vacuum to remove accumulation of any loose particulate from the pins and
heat transfer surfaces. Clean the casting pins by flushing with clean water using a standard garden spray
nozzle. Do not use any cleaning agents or solvents. A soft nylon brush may be used in accessible area.
Remove inspection cover and inspect Condensate collector sump. Drain and flush the condense collector
and condensate drain as required.
l) Do not use any cleaning agents or solvents.
m) Inspect the condensate trap to verify it is open and free from debris. Clean if necessary.
n) Reinstall the burner, burner hood, combustion fan, gas valve assembly and the attenuator hose.
o) Reconnect any wiring which has been disconnected.
p) Qualified service personnel should thoroughly inspect the heating system and correct any deficiencies
prior to restarting the boiler.
q) Follow Section xI Start-up and Checkout instructions before leaving installation.
r) Perform the combustion test outlined in Section xI.
s) Ensure system water is within required PH range (6.0 and 8.5).
t) Inspect vent system.
• To ensure all joints and pipe connections are tight.
• To ensure it is free from debris, cracks, corrosion and/or deterioration. If any piping needs replacing,
do so immediately.