Maintenance And Service; Annual Maintenance - Beckett CG25 Manual

Maintenance and Service
Annual Professional Ser-
vice Required
Tampering with or making incorrect
adjustments could lead to equipment
malfunction and result in asphyxia-
tion, explosion or fire.
• Do not tamper with the burner or controls or make
any adjustments unless you are a trained and quali-
fied service technician.
• To ensure continued reliable operation, a qualified
service technician must service this burner annually.
• More frequent service intervals may be required in
dusty or adverse environments.
• Operation and adjustment of the burner requires
technical training and skillful use of combustion test
instruments and other test equipment.
Turn Off Electric and Gas
Supply Before Servicing
Failure to turn off electric and gas supply could
result in electrical shock, gas leakage, explo-
sion, or fire hazards.
• Turn main gas valves and electric power off before
performing any maintenance.
• If a maintenance procedure requires electrical power,
use extreme caution.
Annual maintenance - (The following
should be performed by a qualified service tech-
nician only.)
[3 Burner;
.
Run the burner and perform a complete combus-
tion test using the proper instruments before pro-
ceeding. If necessary refer to the section labeled
Start the Burner. Record the results for refer-
ence.
.
.
Inspect and clean all dirt accumulation from the
gas train, burner exterior, burner air damper, and
surrounding area.
Remove the blower motor and clean any accu-
mulated matter from the blower wheel and motor
end bell.
.
Check wheel for damage and the hub setscrew
for tightness. If the blower wheel must be re-
moved from the motor shaft, insure that clear=
ance specifications are maintained (blower wheel
hub to motor clearance should be .020").
.
.
.
.
.
10.
11.
12.
13.
14.
15.
16.
Clean the inside surfaces of the burner housing
scroll and especially the air intake area and air-
flow proving switch suction tube.
If the blower motor does not have permanently
lubricated bearings, oil the motor. Clear any de-
bris from the air vents on the motor body.
Clean the ignition transformer, baseplate, and
terminal bushings. Inspect the ignition leads for
signs of deterioration and loose terminals.
If the burner flame detection is a UV scanner, in=
spect the mounting and clean the lens according
to the component manufacturer's recommenda-
tions.
Remove the gas gun assembly and clean the
entire unit, paying special attention to the air dif-
fuser and spuds.
Inspect the flame rod (if used) for oxidation or
distortion. Clean all surfaces, set the probe po-
sition, and insure that the flame rod is securely
fastened. Refer to Figures 15A, and 15B.
Inspect the ignition electrode for any damage.
Clean all surfaces, set the proper electrode gap,
and make sure it is securely fastened.
Clean the inside of the air tube and inspect the
combustion end for any deterioration. Referring
to Figure 2, check the recess dimension from re-
fractory.
Inspect gas tube O-ring condition and replace if
damaged. Install gas gun assembly back into the
burner and use the jacking screw to tighten the
gas gun securely in place. (Automotive chassis
or bearing grease is suitable for o-ring lubrica-
tion.)
Inspect the condition of the appliance mounting
plate and burner mounting flange gaskets and
replace any damaged materials. See Figure 6.
Inspect all burner control wiring and the burner
control panel for damaged insulation and loose
terminals/connections.
Verify that the source voltage to the burner and
control panel is within 10% of the burner rating as
listed on the nameplate. (Figure 1)
6104 BCGSO RoB 25