18-CD22D1-5
19
Installer’s Guide
6" Min.
40 Inch
Upflow or
Downflow
Furnace
Slope 1/4" per ft.
Slope 1/4" per ft.
All horizontal pipes must be supported at a maximum of 3 foot
intervals
DOWNWARD VENTING
Furnace may be in vertical or horizontal configuration.
h
NOTES:
A) Condensate trap for vent pipe must be a minimum of 6
inches in height.
B) Condensate trap for vent and inlet pipe must be connected
into a condensate drain pump; an open or vented drain; or
it can be connected to the outlet hose of the furnace's
condensate trap. Outdoor draining of the furnace and coil
condensate is permissible if allowed by local codes.
Caution should be taken to prevent drains from freezing or
causing slippery conditions that could lead to personal
injury. Excessive draining of condensate may cause
saturated ground conditions that may result in damage to
plants.
C) The condensate trap should be primed at initial start up
prior to heating season operation.
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 27 & 28 must also
have the combustion air inlet installed - meeting dimension
requirements of Figure 22.
GAS PIPING
The upflow /horizontal furnace is shipped standard for left side
installation of gas piping. A knock-out is provided on the right
side for an alternate gas piping arrangement. See Figure 34.
j
DOWNWARD VENT
LENGTH IS LIMITED
TO A MAXIMUM OF 15
EQUIVALENT FEET.
k
BAYAIR30AVENTA
MAINTAIN 12 IN.
(18 IN. FOR CANADA)
MINIMUM CLEARANCE
ABOVE HIGHEST
ANTICIPATED SNOW
LEVEL. MAXIMUM OF
24 IN. ABOVE ROOF.
VENT
COMBUSTION
AIR
CONCENTRIC VENT
ROOF TOP APPLICATION
REMOVE RIBS
FROM CAP
COMBUSTION
AIR
ROOF BOOT
(FIELD SUPPLIED)
COMBUSTION
AIR
VENT
ELBOW
(FIELD SUPPLIED)
MAINTAIN 12 IN.
(18 IN. FOR CANADA)
MINIMUM CLEARANCE
ABOVE HIGHEST
ANTICIPATED SNOW
LEVEL. MAXIMUM OF
24 IN. ABOVE ROOF
SUPPORT
(FIELD SUPPLIED)
VENT
CONCENTRIC VENT
ROOF INSTALLATION
l
