Prestige Venting Supplement

29
CHAPTER 3
3.2.4 Category IV - Multiple Boiler Installation
- Sidewall
1. On installations of multiple PRESTIGE boilers, termi-
nate each vent pipe as described in this manual.
2. Each vent termination must be a minimum 12”
[30.5 cm] from the adjacent termination for instal-
lations in the U.S. as shown in Fig. 19 below. For
installations in Canada, provide clearances as re-
quired by CAN/CSA B149.1.
• Fig. 19 shows one option for vent termina-
tions of multiple PRESTIGE boilers. Either
termination option shown in Fig. 17 or Fig.
18 on page 28 can be used for multiple
PRESTIGE boilers. The 12” [30.5 cm] mini-
mum distance between centerlines of the
vent piping must be maintained for any
chosen option.
• Reference Fig. 17 and Fig. 18 on page 28
for vent termination dimensions for each
unit installed in a multiple installation.
3.2.2 Category IV - Vent Installation - Sidewall
1. Vent pipe penetration through combustible or
non-combustible wall material must maintain a
minimum 1/4” [6 mm] clearance for 3” and 4” PVC/
CPVC vent or 1” [2.5 cm] for 2” PVC/CPVC vent. The
diameter of the penetration hole must be 4” [10.2
cm] minimum for 2” and 3” pipe or 5” [12.7 cm] min-
imum for 4” pipe. When using Polypropylene or
Stainless Steel Vent, refer to the vent manufacturer’s
Installation Instructions for clearances.
2. The installer must use a galvanized metal thimble
for the vent pipe penetration.
3. Locate the vent pipe penetration to provide clear-
ances as described in Fig. 17 and Fig. 18 on page
28.
4. The installer must comply with all local codes for iso-
lating the vent pipe as it passes through oors and
walls.
5. The installer must seal all exterior openings around
penetration with an exterior silicon caulk.
3.2.3 Termination Fittings - Sidewall
1. The vent and combustion air terminations must
include a factory supplied “bird screen” installed as
shown in Fig. 9 & Fig. 10 on page 20.
2. The combustion air piping must terminate at the
boiler with a 90º elbow.
3. The vent piping can terminate:
• Using a coupling as shown in Fig. 17 on page 28.
• Using a 90º elbow as shown in Fig. 18 on page 28.
Do not extend the vent pipe outside the side-
wall beyond the dimensions shown in Fig. 17
and Fig. 18 on page 28. Extended exposure
of the vent pipe could cause condensate to
freeze and block the vent pipe, resulting in
substantial property damage, serious injury, or
death.
WARNING
12" [30.5 cm] Min. Above
Grade / Highest
Anticipated Snow Level
Vent
Termination
12" Min.
[30.5 cm]
36" Max.
[91.4 cm]
12" Min. -24” Max.
[30.5 cm - 61 cm]
To Wall Typ.
Fig. 19 - Category IV - Sidewall Termination of Multiple Prestige
Boilers
CHAPTER 3 - CATEGORY IV (INDOOR AIR) INSTALLATION OF VENT/AIR PIPING
NOTICE