Freestyle 2 Series - Page 26

Figure 31 Terminations for multiple boilers
Also maintain maximum distances between the
vent and air pipes for each boiler as shown in
Figure30,page25.
See notices on previous page.
Part number 550-142-950/0122
26
FreeStyle
®
series 2 wall mount gas-fired water boiler – boiler manual
Prepare roof penetrations
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 galvanized metal thimble in the vent pipe
hole.
3. Space the air and vent holes no closer than the minimum
spacings shown in Figure31.
4. Follow all local codes and vent pipe manufacturer’s
instructions for isolation of vent pipe when passing
through oors, ceilings and roofs.
5. Provide ashing and sealing boots sized for the vent
pipe and air pipe. Follow all vent pipe manufacturer’s
instructions.
Termination and ttings
1. Prepare the vent termination elbow and the air termina-
tion elbow (Figure30,page25) by inserting bird screens.
Bird screens must be purchased separately. See the parts
list at the end of this manual for part numbers.
2. e air piping must terminate in a down-turned 180-de-
gree return bend as shown in Figure30,page25. Locate
the air inlet pipe no further than 12 inches from the
center of the vent pipe. is placement avoids recircu-
lation of ue products into the combustion air stream.
3. e vent piping must terminate in an up-turned cou-
pling as shown in Figure30, page25. e top of the
coupling must be at least 12 inches above the air intake.
e air inlet pipe and vent pipe can be located in any
desired position on the roof, but must always be no fur-
ther than 12 inches apart (center to center) and with the
vent termination at least 12 inches above the air intake.
4. Maintain the required dimensions of the nished termi-
nation piping as shown in Figure30,page25.
5. Do not extend exposed vent pipe outside of building
more than shown in this document. Condensate could
freeze and block vent pipe.
12 DIRECT VENT — Vertical with separate pipes (continued)