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Part number 550-100-260/0520
29
ECO
®
Tec
GAS-FIRED WATER BOILER – 80/110/150/199 BOILER MANUAL
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
noncombustible construction, size the vent pipe hole at least
0.4" larger than the vent pipe diameter.
b. Insert a corrosion resistant metal thimble in the vent pipe hole
as shown in Figure 34.
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 page 137.
b. Plate may be field fabricated from corrosion resistant material
of sufficient 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 floors or walls.
6. Seal exterior openings thoroughly with exterior caulk.
1. Prepare the vent termination elbow and the air termination elbow
by inserting bird screens. (See Figure 31, page 28.) Bird screens
must be purchased separately. See the parts list at the end of this
manual for part numbers.
2. Secure the elbows so they will butt against the sidewall termination
plate.
3. 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 Figure 31, page 28.
4. You can orient the vent termination elbow either directly
outward or 90 degrees away from the air inlet elbow as shown in
Figure 31, page 28.
5. Maintain the required dimensions of the finished termination
piping as shown in Figure 31, page 28.
6. For multiple boiler terminations, see Figure 32.
7. 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 flush with the outer plate.
DIRECT VENT — Sidewall with separate pipes (continued)
1 Vent piping
2 Air piping
3 Sidewall termination plates: for 3" PVC,
use plates supplied with boiler in W-M
vent/air plate kit; for 3" AL29-4C or 2" PVC,
purchase optional sidewall separate pipes
plate kit
4 Corrosion resistant thimbles, by installer
5 Bird screen, by installer
6 Air inlet elbow
7 Elbow
8 Nipple
9 Elbow (vent termination)
Multiple terminations –– separate pipes ––
clearance from vent of one air intake of
the next
Multiple terminations –– separate pipes ––
clearance from vent of one air intake of
the next – alternate configuration of air
and vent terminations.
Sidewall termination assembly —
using separate pipes
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