HELIX VX-399 Installation, Operation & Maintanance Manual page 25

FIGURE 6-10 Flue on Sidewall, Combustion Air on Roof
Combustion
FIGURE 6-11 Flue on Sidewall, Inside Combustion Air
Combustion
Air
NOTICE
Configurations of single pipe vent with flue on the
sidewall, requires a tee as the vent terminal. See
Figure 6-10 and 6-11.
6 - COMBUSTION AIR AND VENT PIPING
Maintain 12"(305mm) US
(18"(457mm) Canada)
clearance above highest
anticipated snow level 24"
Air
(610mm) above roof
Vent - T Terminal
12" (305mm)
Anticipated
Snow Line
Ground Level
Vent - T Terminal
12" (305mm)
Anticipated
Snow Line
Ground Level
FIGURE 6-12 Two Pipe Side Wall with 45° Vent
3" (76mm) Min.
24" (610mm) Max.
Separation
Combustion Air, 90°
Elbow Downward
See Snow & Ice
Page 26
FIGURE 6-13 Side Wall Concentric Terminal w/Accelerator
1" (25.4mm) Max.
Separation
Combustion
Air
FIGURE 6-14 Side Wall Venting Terminal w/T-Terminal
12" (305mm) Min.
Separation of Combustion Air and Vent
shall be maintained.
No Maximum separation is required
when using T-Terminal for vent.
See Snow & Ice
If separation in Fig. 6-2 or Fig 6-12 is not large
enough to prevent cross flow contamination
between flue gas and fresh air use T-Terminal as
shown in Fig. 6-14. Use of T-Teminal for vent as
shown in Fig. 6-14 does not have a max. separation
requirement between flue gas and fresh air.
25
12" (205mm) Min.
24" (610mm) Max.
Opening
Separation
24" Min.
Vent w/
Accelerator
See Snow & Ice
Vent w/T-
Termina
Page 26
NOTICE
P/N 240010943, Rev. C [09/07/2016]
Vent
45° Elbow
Upward
Separation
Page 26
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