Install Instructions

&IGURE Boiler vent and air connections
!$!04%23 — Use adapters if using other than
3-inch PVC or CPVC. This is required for different
materials or if using 2-inch pipe.
1. Use ONLY 3” PVC or CPVC pipe at boiler connections.
2. Clean and deburr inside and outside of both ends of air
and vent pipes. Chamfer boiler end of vent pipe for ease of
insertion.
The vent pipe end must be smooth and chamfered
to prevent possible damage to sealing gasket in vent
pipe adapter.
3. Inspect vent or air adapter (above) — verify no obstructions
or foreign objects inside.
4. Loosen clamp screw.
5. Measure 3½ inches from end of pipe and make a mark with
felt-tip pen.
6. Loosen adapter clamp screw.
7. Apply small amount of silicon grease to end of pipe to ease
insertion.
8. Insert pipe into adapter.
9. Slide pipe down until the 3½-inch mark is reached.
Do not apply excessive force or bend the adapter
or flue/air pipe when inserting. The adapter or seal
could be damaged. If any portion of the vent or air
system is damaged, it must be replaced.
10. Secure vent or air pipe by tightening the adapter clamp
securely. Do not overtighten.
11. The seal is accomplished with the internal gasket. The clamp
is only to hold the pipe in place.
53% 37%%0%,"/73&/2 !,,
6%.4!.$!)20)0).' — DO NOT
use short radius elbows for vent or air pip-
ing. Boiler performance could be affected.
Vent and air piping and boiler connections
Follow termination instructions
1. Read and follow all instructions for the termination type used
before proceeding with this page. Follow all instructions provided
by vent pipe manufacturer.
Use only materials from the manufacturers listed in
Figure 20, page 20.
Installing vent and air piping
For polypropylene applications, comply with any addi-
tional requirements in the vent system manufacturer’s
instructions. Provide 3” PVC transition pieces at the
boiler vent and air connections, and also at the termi-
nation if using the W-M termination plate. Provide 2”
or 3” PVC transitions at the termination if using a PVC
concentric vent kit. Install a locking collar at every joint.
For AL29-4C vent pipe applications, comply with any
additional requirements in the vent system manufac-
turer’s instructions. Provide a 3” PVC transition piece
at the boiler vent connection. Air piping must be PVC
or CPVC. Connect to the boiler air piping only with
3” PVC (use a transition piece for 2” air pipe). Provide
3” PVC connections at the termination if using the W-M
termination plate. Provide 2” or 3” PVC transitions at
the termination if using a PVC concentric vent kit.
1. Work from the boiler to vent or air termination. Do not exceed the
lengths given in the previous pages for either the air or vent piping.
2. See Figure 39 for attaching vent (and air) pipes at the boiler. Con-
nections must be 3” PVC or CPVC only — use transitions if needed
to adapt to other material or size (2”).
3. Cut pipe to required lengths.
4. Dry assemble entire vent or air piping to ensure proper fit before
assembling any joint.
5. Maintain minimum clearance of ³⁄₁₆ inch between vent pipe and
any combustible wall or material.
6. Seal wall or floor penetration openings following local code re-
quirements.
7. Assembling PVC or CPVC: (
— follow pipe
manufacturer’s instructions for preparation and assembly)
a. Deburr inside and outside of pipe ends.
b. Chamfer outside of each pipe end to ensure even cement
distribution when joining.
c. Clean all pipe ends and fittings. Dry thoroughly.
d. For each joint:
s Handle fittings and pipes carefully to prevent contamina-
tion of surfaces.
s Apply primer liberally to both joint surfaces — pipe end
and fitting socket.
s While primer is still damp, lightly apply approved cement
to both surfaces in a uniform coating.
s Apply a second coat to both surfaces. Avoid using too much
cement on sockets to prevent cement buildup inside.
s With cement still wet, insert pipe into fitting, twisting ¼
turn. Make sure pipe is fully inserted.
s Wipe excess cement from joint. Check joint to be sure a
smooth bead of cement shows around the entire joint.
Part number 550-142-122/0513
35
TM
GAS-FIRED WATER BOILER — Boiler Manual