Beckett CG10 Manual page 26

Section: Maintenance and Service
Use authorized replacement parts
only. Restrictors are precision-
machined parts and O-rings are rated for fuel contact.
Do not attempt to replicate or modify any parts. Refer to
Table 3.
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. 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 slot on the locating pad on top of the gun. There is
also an external verifi cation of correct assembly: when
the screw is fully tightened, the e-clip on the top of the
center pin should come fl ush with the top of the screw.
Refer to Figure 17.
Refer to Figures 15 and 16 when performing the
following steps.
1. Remove the jacking screw (B) from the air tube/
manifold assembly to free the internal gas tube (C).
2. Gently rock the internal gas tube (C) to loosen the
tube from the union (F).
3. Inspect the O-rings and insure that they are
properly lubricated. (A silicon O-ring lubricant is
recommended, but automotive chassis or bearing
grease is an acceptable substitute.)
4. Referring to Figure 16, place the restrictor (E)
with pre-attached, pre-lubricated O-ring (G) into
the internal gas tube (C). Use your hand to press
the restrictor into the tube. The O-ring will hold the
restrictor in place.
5. Insure that the O-ring (H), attached to the outside
diameter of internal gas tube, is properly lubricated
and seated against the fl ange on the internal gas
tube.
6. Install the internal gas tube (C) back into the air
tube (A) housing, refer to Figure 15. Fit the end of
the tube into the union (F) on the air tube.
7. Re-install the jacking screw (B). (Refer to the above
notice for installation details.)
8. Fill out and place the supplied Conversion Data
Plate adjacent to the rating plate.
9. Complete and attach the supplied Adjustment Data
With the gas restrictor installed, as
shown in Figure 15, all burner air
adjustments and gas manifold pressure adjustments for
propane will be approximately the same as the natural
gas adjustments shown in the burner manual, or printed
on the "Mfr's Settings" label on the burner housing. For
a copy of the current burner manual go to http://www.
beckettcorp.com/protect/tech.asp. If furtherTechnical
assistance is required, call 800-645-2876, Monday thru
Friday, 8AM to 5PM EST.
26
Figure 17 – Gas Gun Assembly Installation
Table 3 - Propane Restrictors
Replacement Part Numbers
Restrictor
Burner Model
Kit
CG10.1 3246700U
CG10.2 3246701U
CG10.3, CG10.2S 3246702U
CG10.1S 3246703U
CG10.3S, CG10.6S 3246705U
CG10.4S 3246706U
CG10.5S 3246707U
CG10.4 3246723U
CG10.5 3246724U
CG10.6 3246725U
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
without 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 cation of correct assembly:
when the screw is fully tightened, the e-clip on the
top on the center pin should come fl ush with the top
of the screw.
Restrictor O-Ring
Inside Part
Diameter Number
0.401 3226409U
0.432 3226409U
0.470 3226409U
0.418 3226409U
0.510 3226409U
0.459 3226409U
0.482 3226409U
0.547 3226409U
0.578 3226409U
0.594 3226409U