American Standard CUX1B040A9241A Installation, Operation And Maintenance Manual page 20

Installation Instructions
VENTING THROUGH THE ROOF
When penetrating roof with a 2" PVC vent pipe, a 2" electrical
conduit flashing may be used for a weather tight seal. Lubricate
flexible seal on flashing before PVC pipe is pushed through the
seal. (Field Supplied)
NOTE:
No vent cap as shown in Figure 35 is the preferred method for
vertical vent termination in extremely cold climates.
In extreme climate conditions, insulate the exposed pipe above
the roof line with Armaflex type insulation.
VENTING ROUTED THROUGH A MASONRY CHIMNEY
VENT FITTING MATERIAL – STAINLESS STEEL
Gas and liquid tight single wall metal vent fitting, designed for
resistance to corrosive flue condensate such as Type 29-4C MUST
be used throughout.
These fittings and fitting accessories are to be supplied locally.
DIRECTION OF STAINLESS STEEL FITTING
All stainless steel fitting must be installed with male end
towards the furnace.
All horizontal stainless steel sections must be positioned with
the seam on top.
All long horizontal sections must be supported to prevent
sagging.
All pipe joints must be fastened and sealed to prevent escape
of combustion products into the building.
NOTE:
Both venting methods shown in Figure 37 & 39 must also have
the combustion air inlet installed - meeting dimension require-
ments of Figure 35.
Page 20
REMOVE RIBS
FROM CAP
COMBUSTION
AIR
ROOF FLASHING BOOT
(FIELD SUPPLIED)
VENT
BAYAIR30AVENTA (VERTICAL)
For Canadian applications only, IPEX 196006 may be used for
vertical vent terminations.
MAINTAIN 12 IN.
(18 IN. FOR CANADA)
MINIMUM CLEARANCE
ABOVE HIGHEST
ANTICIPATED SNOW
LEVEL. MAXIMUM OF
24 IN. ABOVE ROOF.
For Canadian applications only, IPEX 196006 may be used for
vertical vent terminations.
MAINTAIN 12 IN.
VENT
(18 IN. FOR CANADA)
MINIMUM CLEARANCE
ABOVE HIGHEST
ANTICIPATED SNOW
LEVEL. MAXIMUM OF
24 IN. ABOVE ROOF
SUPPORT
(FIELD SUPPLIED)
ELBOW
(FIELD SUPPLIED)
COMBUSTION
AIR
VENT
COMBUSTION
AIR
Pub. No. 41-5016-12