Beckett CG4 - Manual (Page 24)

24
Section: MAINTENANCE AND SERVICE
8. Inspect the flame rod for oxidation or distortion.
Clean all surfaces, set the probe position, and
insure that the flame rod is securely fastened.
Refer to Figure 17.
9. Inspect the ignition electrode for any damage.
Clean all surfaces, set the proper electrode gap,
and make sure it is securely fastened.
10. Clean the inside of the air tube and inspect the
combustion end for any deterioration. Referring
to Figure 11 on Page 16, check the recess
dimension from refractory.
11. Inspect gas tube O-ring condition and replace if
damaged. Install gas gun assembly back into
the burner and tighten the gas gun securely in
place. (Automotive chassis or bearing grease is
suitable for o-ring lubrication.)
12. Inspect the condition of the appliance mounting
plate and burner mounting flange gaskets and
replace any damaged materials.
13. Inspect all burner control wiring and the burner
control for damaged insulation and loose
terminals/connections.
14. Verify that the source voltage to the burner and
control panel is within 10% of the burner rating as
listed on the nameplate ( Figure 2 on Page 5).
○ Appliance – (Follow appliance manufacturer’s
service procedures. The following steps are
emphasized because they relate to burner operation)
1. Insure that the flue passages, flue vent pipes,
and chimney flues are clean and unobstructed.
2. Check barometric damper or draft hood for
proper operation.
3. Check the condition of the combustion chamber
refractory, the front-plate insulation, and
all gaskets and seals. Repair or replace as
necessary.
4. Inspect boiler sections and system load piping
for possible leaks. Make all necessary repairs.
5. Check all operating and safety controls on the
boiler for proper installation and operation.
6. Perform all maintenance and tests according to
the burner control manufacturer’s instructions
(limits, controllers, low water cutoff, relief valves,
feed valves, etc.).
○ Gas supply piping:
1. Inspect all piping for leakage and proper
installation.
2. Perform necessary repairs to comply with all
codes.
3. Check inlet pressure to the gas valve.
○ Installation area:
1. Insure that there are no combustible materials,
flammable liquids or vapors in the vicinity of the
heating appliance.
2. Verify that the combustion air supply is adequate.
○ Adjust the burner for proper combustion:
1. Run the burner and perform a complete
combustion test using the proper instruments. If
necessary refer to the section labeled Start the
Burner. Record the results for reference.
2. Visually inspect the flame. Look for changes in
shape, size, and color.
3. Monitor several burner start-up cycles. Verify
prompt ignition and flame stability.
4. Calculate the input firing rate and compare to the
appliance specifications.
5. Monitor the stack temperature. Compare to
start-up and trend level.
○ 7590 GeniSys Primary Control:
Follow the instructions in Beckett GeniSys Model
7590 manual (available at www.beckettcorp.com or
by calling 1-800-645-2876). Verify that the control
is functioning to specifications. See “Check for
Normal Operation” section.
○ Manual shutdown for long periods:
1. Close all gas valves in the gas supply piping
system.
2. Turn off all electrical power to the burner.
3. Protect the burner and controls from moisture
and dirt.
○ Gas Valve
The gas valve has a cycle rating of 100,000
(10 years of 6 cycles per hr.). When valve has
exceeded this value, it should be replaced.