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Terminations for multiple boilers
Also maintain maximum distances between
the vent and air pipes for each boiler as shown
in Figure 31, page 28 .
See notices on previous page.
Part number 550-100-260/0520
35
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.
3. Space the air and vent holes
no closer than the minimum spacings
shown in Figure 43 .
4. Follow all local codes and vent pipe manufacturer’s instructions
for isolation of vent pipe when passing through fl oors, ceilings
and roofs.
5. Provide fl ashing and sealing boots sized for the vent pipe and air
pipe. Follow all vent pipe manufacturer’s instructions.
1. Prepare the vent termination elbow and the air termination elbow
( Figure 42, page 34 ) by inserting bird screens. Bird screens must be
purchased separately. See the parts list at the end of this manual
for part numbers.
2. The air piping must terminate in a down-turned 180-degree return
bend as shown in Figure 42, page 34 . The edge of the air inlet elbow
must be at least 12 inches above the roof or snow line.
3. The vent piping must terminate in an up-turned coupling as shown
in Figure 42, page 34 . The top of the coupling must be at least 12
inches above the air intake in order to avoid recirculation of fl ue
products into the combustion air stream.
4. Maintain the required dimensions of the fi nished termination
piping as shown in Figure 42, page 34 .
5. Do not extend exposed vent pipe outside of building more than
shown in this document. Condensate could freeze and block vent
pipe.
DIRECT VENT — Vertical with separate pipes (continued)
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