Burnham MMII manual Install Vent Pipe, General, Install Vent Pipe, Burnham Gasket-Less Vent System

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 first 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 sufficient a standard length pipe may be cut using the procedure outlined below .

WARNING

Never exceed maximum installed length of 19¾ inches for adjustable length pipe. Risk of flue gas leakage is possible.

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 fitting or pipe.

NOTICE

Cut must be square with pipe and filed or sanded smooth before joining. Carefully ensure roundness of cut pipe by hand with gloves before installing. Seal joint with RTV specified in this manual.

6.Seal all Burnham Gasket-Less vent, Burnham mixed vent (Gasket-Less and Gasketed) and field 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 fittings using an alcohol pad to remove any dirt and grease.

b.Slip a locking band over female (bell) end of pipe/fitting.

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 flue 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.

13