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Part number 550-100-211/0122
– 26 –
DIRECT VEN T
(continued)
All vent pipes and air inlets must terminate at the same
height to avoid possibility of severe personal injury, death
or substantial property damage.
2. Place wall penetrations to obtain minimum clearances shown in
Figure28 for U. S. installations. For Canadian installations, provide
clearances required by
Natural Gas and Propane Installation Code,
CAN/CSA
B149.1 or B149.2 and a ULCS636 compliant vent kit.
3. e air inlet of a Evergreen
®
boiler is part of a direct vent connec-
tion. It is not classied as a forced air intake with regard to spacing
from adjacent boiler vents.
Preparewallpenetrations
1. Air pipe penetration:
a. Cut a hole for the air pipe. Size the air pipe hole as close as
desired to the air pipe outside diameter.
2. Vent pipe penetration:
a. Cut a hole for the vent pipe. For either combustible or non-
combustible construction, size the vent pipe hole at least 0.4”
larger than the vent pipe diameter.
b. Insert a galvanized metal thimble in the vent pipe hole as
shown in Figure29.
3. Use the provided paper template for correct location of hole centers.
4. Use of a sidewall termination plate is REQUIRED.
a. Kits for several vent sizes are available from Weil-McLain.
See “VENT/AIR PARTS AND KITS” on page117.
b. Plate may be eld fabricated from corrosion resistant material
of sucient strength. Plate must allow venting to maintain
minimum clearance to combustibles.
Ensure that the plate material is strong enough to prevent
the termination from being pushed inward if struck or
pushed from the outside.
5. Follow all local codes for isolation of vent pipe when passing
through oors or walls.
6. Seal exterior openings thoroughly with exterior caulk.
Terminationandttings
1. Prepare the vent termination elbow and the air termination elbow
by inserting bird screens. (See Figure27,page25.) Bird screens
must be purchased separately. See the parts list at the end of this
manual for part numbers.
2. When completed, the air termination coupling must be oriented
at least 12 inches below the vent termination and at least 12 inches
above grade or snow line as shown in Figure27,page25.
3. Orient the vent termination elbow directly outward as shown in
Figure27,page25.
4. Maintain the required dimensions of the nished termination
piping as shown in Figure27,page25.
5. For multiple boiler terminations, see Figure28.
6. Do not extend exposed vent pipe outside of building more than shown
in this document. Condensate could freeze and block vent pipe.
If extending the vent and air pipes out from the wall,
install a coupling on each pipe. Mount the piping with
the coupling ush with the outer plate.
Wall penetration thickness between 0” to 24”.
See notices on previous page.
1 Air piping.
2 Vent piping.
3 Sidewall termination plates: for
4”PVC, use plates supplied with
boiler in W-M vent/air plate kit; for
4” AL29-4C or 3” PVC, purchase
optional sidewall separate pipes plate
kit.
4 Galvanized thimble, by
installer.
5 Bird screen, by installer.
6 Air inlet elbow.
7 Elbow.
8 Nipple.
9 Elbow (vent termination).
Figure28
Multiple separate pipes sidewall terminations
— maintain vertical spacing between vent and
air ttings shown in Figure 27, page 25.
Figure29 Sidewall termination assembly — using
separate pipes
220 /29 9/3 00 /39 9
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