13
4. Secure vent connector with washers and locknuts.
Do not overtighten.
D.
Install Vent Pipe, General.
1. Plan venting system to avoid possible contact with
plumbing or electrical wires. Start at vent connector.
Work toward vent terminal.
2. Use non-combustible ¾ inch pipe strap to support
horizontal runs and maintain vent location and slope
while preventing sags in pipe. Do not restrict
thermal expansion or movement. Maximum support
spacing is 5 feet. Do not penetrate any part of the
vent system with fasteners.
3. Provide and maintain minimum 5 inch clearance to
combustible materials. Use double wall thimble
(Burnham Part No. 8116115) when penetrating
combustible wall. Other wall thimble manufacturers
are American Metal Products, Hart & Cooley, and
Metal Fab.
4. Once a vent pipe manufacturer and system is chosen
never mix and match vent systems.
5. If a non-standard length pipe is required:
The use of the adjustable length pipe (P/N
8116319U) is recommended to complete a non-
standard pipe length. This pipe requires a minimum
installed length of 12¾ inch and can adjust across a
7 inch gap up to a maximum of 19¾ inch long.
(Note for the adjustable pipe the installed length
should be measured from the centerline of the bead
on the male end of the fi rst pipe to the end of the
female pipe excluding the locking band of the
second pipe with a single gasket.) Only in the event
the adjustable length pipe is not suffi cient a standard
length pipe may be cut using the procedure outlined
below .
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Carefully cut pipe to length using a hacksaw with
minimum 32 teeth per inch or circular saw with
metal abrasive wheel. Remove male (bead) end
only – female (bell) end accepts next fi tting or pipe.
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6. Seal all Burnham Gasket-Less vent, Burnham mixed
vent (Gasket-Less and Gasketed) and fi eld cut joints
using Dow Corning Silastic 732 RTV, Dow Corning
Silastic 736 RTV, GE RTV106, Polybac #500 RTV,
Sil-bond RTV 4500 (Acetoxy) and Sil-bond RTV
6500. Do not use other adhesives or sealants.
E.
Install Vent Pipe, Burnham Gasket-Less Vent System.
1. Procedure for Joining Burnham Gasket-Less Vent
Pipe and Fittings. See Figure 10A.
Figure 10A: Burnham Gasket-Less Vent Joint
a. Clean joints of pipe or fi ttings using an alcohol
pad to remove any dirt and grease.
b. Slip a locking band over female (bell) end of
pipe/fi tting.
c. Apply a continuous ¼ inch bead of sealant
around male end of joint no more than 1/8 inch
from end.
d. Align weld seams and use a slight twisting
motion to FULLY insert male end into female
end of joint. Ensure bead in male end rest against
the end of the female pipe.
e. Smooth sealant around joint for a continuous
seal. Reapply sealant if necessary.
f. Slip the locking band over joint and align closest
bead in locking band with bead in male end of
pipe.
g. Tighten locking band by HAND with a 5/16" nut
driver until snug plus ¼ turn. DO NOT
SECURE JOINTS WITH SHEET METAL
SCREWS OR POP RIVETS. DO NOT
PUNCTURE THE VENT SYSTEM!
h. Once the installation is complete, operate
appliance and inspect all joints to ensure that fl ue
gases and/or liquid condensate will not escape.
F.
Install Vent Pipe, Burnham Gasketed Vent System.
1. Procedure for Joining Burnham Gasketed Vent Pipe
and Fittings. See Figure 10B.
a. Wipe the male end of each joint using an alcohol
pad to remove any dirt and grease.
