Assemble Gas Train; Vent Lines - Beckett CG15 Manual

Figure 8 — Minimum Combustion Chamber Dimensions
Minimum Inside Dimensions (inches)
W
CG15.1S 15
CG15.2S 16
CG15.3S 17
CG15.4S 18
CG25.1S 19
CG25.2S 20
CG25.3S 21
CG25.4S 22
CG25.5S 23
CG50.1S 21
CG50.2S 22
CG50.3S 24
CG50.4S 25
CG50.5S 27
Dimensions shown are for cast iron sectional
boilers with uptakes between sections. For
minimum dimensions of other furnace types
consult R.W. Beckett Corporation.
16 — Section: Installation Instructions
H L A
16 42 7
17 45 8
18 47 8
19 50 9
20 45 9
21 48 10
22 50 10
23 52 11
25 55 11
23 55 10
24 58 11
26 62 12
27 65 12
29 70 13

Assemble Gas Train

• The gas train is normally shipped as components
and must be assembled and installed at the site.
• The gas train is used for both natural gas and
propane; for converting burner, see Propane
Conversion instructions on page 18.
• Verify that the gas train components are not
damaged and all piping and fittings are clean inside
and out.
See Figure 9 through Figure 11 for typical
component layout.

Vent lines

Install vent lines to any gas valve component that
requires atmospheric air pressure to balance a
diaphragm. Vent lines must be run to the outdoors,
with the termination point away from fresh air intakes
and windows. The terminal opening must be fitted
with a wire mesh screen to block insects and other
contaminants from entering the vent and must be
mounted in such a position that water, ice, dirt, or
any other foreign matter cannot infiltrate and block
the vent piping. Make sure the final assembly is
anchored securely.
Explosion, Fire, and Asphyxiation Hazard.
Do not use Teflon tape on gas piping. Damage to gas
valve cutoff seals and valve bodies could cause gas
leaks.
Pieces of tape can be cut loose during installation and
f
lodge in gas valves causing cutoff seal problems.
Teflon tape 'lubricates' pipe threads, allowing iron pipes
f
to penetrate too deeply into aluminum valve bodies
causing distortion and leakage.
Use only pipe sealant compounds that are resistant to
f
the gas being used.
Explosion, Fire, and Asphyxiation Hazard.
The orientation of the gas valves may have an effect on
operation and safety. Gas valves shall be mounted in
accordance with their manufacturer's instructions.
Never disassemble gas valve. Always install the gas
valve with the gas flow in the same direction as the
arrow. These actions may cause gas valve to leak.
CG15, CG25, CG50 Burner Manual, Form No. 6104BCG50