Direct Exhaust Only; Installing Vent And Air Piping - Weil-McLain Evergreen 220 Instructions Manual

220/299/300/399
®
Direct Exhaust, air piping and boiler connections
Follow termination instructions
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 2, page 4.

Installing vent and air piping

For polypropylene applications, comply with any ad-
ditional requirements in the vent system manufacturer's
instructions. Provide 4" PVC-to-PP transition pieces at
the boiler vent and air connections. PP adapter must
have smooth, straight section of pipe to insert in to the
boiler vent and air connections and must fit and seal
tightly. PP adapters with their own seal which would
interfere with the internal seal of the boiler vent or air
connections must not be used. Refer to page 117 in the
boiler manual for a list of compliant adapters. 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 4" PVC transition piece
at the boiler vent connection. Air piping must be PVC
or CPVC. Connect to the boiler air piping only with
4" PVC (use a transition piece for 3" air pipe). Provide
4" PVC connections at the termination if using the W-M
termination plate. Provide 3" or 4" PVC transitions at
the termination if using a PVC concentric vent kit.
1. Work from the boiler to vent termination. Do not exceed the
lengths given in the previous pages for vent piping.
2. See Figure 8 for attaching vent pipe at the boiler. Connections
must be 4" PVC or CPVC only — use transitions if needed to
adapt to other material or size (3"). When transitioning to 3",
use tapered reducer.
3. Cut pipe to required length.
4. Dry assemble entire vent or air piping to ensure proper fit before
assembling any joint.
5. Maintain minimum clearance of
any combustible wall or material.
6. Seal wall or floor penetration openings following local code
requirements.
7. Assembling PVC or CPVC: (
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:
• Handle fittings and pipes carefully to prevent contamina-
tion of surfaces.
• Apply primer liberally to both joint surfaces — pipe end
and fitting socket.
• While primer is still damp, lightly apply approved cement
to both surfaces in a uniform coating.
• Apply a second coat to both surfaces. Avoid using too
much cement on sockets to prevent cement buildup inside.
• With cement still wet, insert pipe into fitting, twisting ¼
turn. Make sure pipe is fully inserted.
• Wipe excess cement from joint. Check joint to be sure a
smooth bead of cement shows around the entire joint.
Part number 550-100-156_0917
– Instructions Direct Exhaust Venting
inch between vent pipe and
3/16
— follow pipe
Figure 8
Boiler vent and air connections
ADAPTERS
— Use adapters if using other than
4-inch PVC or CPVC. This is required for different
materials or if using 3-inch pipe.
1. Use ONLY 4" 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 3 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 3 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.
When transitioning to 4-inch to 3-inch, use
tapered reducer with 4" nipple (6" Length or
greater). Do NOT use 4-inch to 3-inch bushing.
Bushing will NOT seal in boiler adapter.

DIRECT EXHAUST ONLY

DIRECT EXHAUST installations — air inlet
opening protection
(sized for air inlet fitting - included in kit).
Insert the bird screen into the air inlet fitting
to prevent foreign objects from entering the
opening.
USE SWEEP ELBOWS FOR ALL
VENT AND AIR PIPING — DO NOT
use short radius elbows for vent or air pip-
ing. Boiler performance could be affected.
: Obtain a bird screen
11