GAMA Gas-Fired Furnace, User'S Information Manual

Page: 22 / 40

Horizontal (Side Wall) Vent Termination:
To prevent blockage of the combustion air and
exhaust vent by snow, vent termination must be made 12"
(in.) above the anticipated maximum snow accumulation
level (See Figure 10).
A minimum of 4' (ft.) clearance must be provided from
electric meters, gas meters, regulators and relief
equipment. In Canada refer to the current Canadian Fuel
Gas Code.
Terminations must terminate not less than one-
foot above, below or horizontal from any inlet to
building.
Do not terminate over public walkways or over an
area where condensate or vapor could create a nuisance
or hazard. Inlet and outlet pipes may not be vented
directly above each other.
Figure 10
HORIZONTAL VENT TERMINATION
Figure 11
ALTERNATE HORIZONTAL VENT TERMINATION
NOTE:
If exhaust vent pipe is extended more than 24",
insulate the vent pipe between the two outside
90° elbows with closed cell insulation.
The optional concentric vent termination kit (2"
diameter Part No. 20280901 / Cat. No. 87L83 or 3"
diameter Part No. 20280902 / Cat. No. 87L84) may also
be used for horizontal (side wall) vent termination.
2"
diameter concentric vent approved for use with 50
and 75 models only.
Special consideration for this
termination system should be given to: 1) possible
damage from the vapors to plants/shrubs, other
equipment and building materials, 2) possible damage to
the terminal from foreign objects, 3) wind effects that may
cause recirculation of flue products, debris or light snow,
and 4) visible vent vapor.
The concentric vent kit has complete installation
instructions.
Figure 12
CONCENTRIC VENT HORIZONTAL TERMINATION
Figure 13
CONCENTRIC VENT HORIZONTAL MOUNTING
Vertical Vent Termination:
The vertical vent terminations should be sealed with
a plumbing roof boot or equivalent flashing.
The inlet of the intake pipe and the end of the
exhaust vent must terminate no less than 12" (in.) above
the roof or snow accumulation level, and 12" (in.) away
from a vertical wall or other protrusion (See Figure 14).
In all venting configurations it is required to use
terminations specified. The intake elbow is field supplied.
20558801 Issue 0442 Page 14 of 32