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Modu-Fire
®
Gas-Fired Boiler Maintenance
25
3. Inspect burner for any signs of deterioration or
corrosion. Replace immediately if deterioration
or corrosion is evident.
The blower motor is permanently lubricated and
does not require periodic lubrication.
This work should be performed by factory-trained
personnel.
5.1.5 Annually
In addition to the recommended monthly service:
1. Check burner and clean off any soot or foreign
material that may have accumulated. See Sec-
tion 5.2 on "Cleaning the Burner." Check for
corrosion of the burner and its parts. If there is
evidence of deterioration or corrosion, replace
immediately.
2. Inspect combustion chamber through access
door on front side of boiler. To remove doors,
remove fasteners, pull door forward slightly,
then pull upward. Note any signs of deteriora-
tion. Take corrective action as necessary.
3. Inspect and clean heat exchanger. Clean exte-
rior of finned tubes and flush inside of heat ex-
changer as required (separate from system
flush).
4. Examine the venting system at least once a year.
a. Check all joints and pipe connections for
tightness.
b. Check pipe for corrosion or deterioration. If
any piping needs replacing, do so immedi-
ately.
5. Inspect heating system for other problems. This
work should be performed by factory-trained
personnel.
6. Perform combustion analysis.
7. The relief valve should be tested as per the
valve manufacturer’s recommendations at least
annually or as indicated by local codes.
8. Leak test gas valves.
5.2
CLEANING THE BURNER
Burner Assembly
1. Follow Lock out / Tag out procedures for Elec-
tric, Gas, and Water connections.
2. Remove the top cover of the boiler.
3. Disconnect the pilot tube, main gas union, elec-
trode wire, ground wire, mixer core tube, UV
Scanner, and the 4 burner hold down nuts.
4. Remove the burner and mixer core from the
boiler and place it on the floor.
5. Use low pressure air, max. 20 psig, to blow in-
side the burner first, then outside of the burner,
in order to remove any accumulated dust or lint
build-up. Also blow the air down the pilot tube
to clean away any dust or dirt
6. Check that the electrode is not touching the wall
of the pilot tube. Also be sure the electrode is
not cracked and that the ceramic spider is able
to move up and down freely.
7. Use a soft, clean cloth to remove accumulated
contaminants from the UV radiation tube (UV
scanner) glass envelope.
UV
Scanner
Burner
Tube
Burner
Screen
Pilot
Tube
Mixer
Core
Ignition
Electrode