Figure 14 – Gas Gun Assembly Installation - Beckett CG10 Manual

13. 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 chas-
sis or bearing grease is suitable for o-ring lubri-
cation.)
14. Inspect the condition of the appliance mounting
plate and burner mounting fl ange gaskets and
replace any damaged materials. See Figure 6.
15. Inspect all burner control wiring and the burner
control panel for damaged insulation and loose
terminals/connections.
16. 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)
Appliance – (Follow appliance manufactur-
er's service procedures. The following steps
are emphasized because they relate to burner
operation)
1. Check the condition of the combustion chamber
refractory, the front-plate insulation, and all gas-
kets and seals. Repair or replace as necessary
2. Insure that the fl ue passages, fl ue vent pipes,
and chimney fl ues are clean and unobstructed.
3. Check barometric damper or draft hood for prop-
er operation.
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:
Inspect all piping for leakage and proper installation.
Perform necessary repairs to comply with all codes.
Installation area:
1. Insure that there are no combustible materials,
fl ammable liquids or vapors in the vicinity of the
heating appliance.
2. Verify that the combustion air supply is function-
ing properly, adequately sized, clean, and prop-
erly lubricated.
22
Adjust the burner for proper combus-
tion:
Follow the guidelines under "Start the Burner" to set the
combustion levels using test instruments.
Flame safeguard:
Follow the control manufacturer's instructions and verify
that the control is functioning to specifi cations. See Page
11 for typical sequence of operation and Items 8 through
10 on Page 19 for control system checks.
Manual shutdown for long periods:
1. Close all gas valves in the gas supply piping sys-
tem.
2. Turn off all electrical power to the burner.
3. Protect the burner and controls from moisture
and dirt.
Figure 14 – Gas Gun Assembly Installation
The gun assembly is secured inside the air tube by
a spring-loaded jacking screw. It is spring loaded in
order to control the force it can impose on the gun
assembly. The screw can be tightened fi rmly with-
out putting excessive pressure on the gun assembly
that might distort the gun or damage its O-ring seals.
When installing the jacking screw look inside the air
tube to verify that the pointed tip of the jacking screw
pin is seated into the small hole on the locating pad
on top of the gun. There is also an external verifi ca-
tion of correct assembly: when the screw is fully tight-
ened, the e-clip on the top on the center pin should
come fl ush with the top of the screw.
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6104 BCG10 R0