Carrier 58MXA Installation, Start-Up, And Operating Instructions Manual page 30

VERTICAL SEPARATION
BETWEEN COMBUSTION
CLEARANCE ABOVE HIGHEST
ANTICIPATED SNOW LEVEL.
MAXIMUM OF 24 IN. ABOVE ROOF.
MAINTAIN 12 IN.
(18 IN. FOR CANADA)
MINIMUM CLEARANCE
ABOVE HIGHEST
ANTICIPATED SNOW
LEVEL. MAXIMUM OF
24 IN. ABOVE ROOF.
Fig. 37—Concentric Vent and Combustion-Air Roof
Termination (Preferred)
1" MAXIMUM
COMBUSTION-AIR
Fig. 38—Concentric Vent and Combustion-Air Side
Termination
COUPLING
AIR AND VENT
8 3 / 4 " FOR 3" KIT
6 3 / 4 " FOR 2" KIT
MAINTAIN 12 IN. MINIMUM
Fig. 36—Roof Termination (Preferred)
VENT
COMBUSTION
AIR
A93054
OVERHANG OR ROOF
12" MINIMUM
VENT
MAINTAIN 12 IN.
CLEARANCE
ABOVE HIGHEST
ANTICIPATED SNOW
LEVEL OR GRADE,
WHICHEVER IS
GREATER.
A93055
ROOF
18" MAXIMUM
BRACKET
VENT
OVERHANG OR ROOF
VENT
90°
BRACKET
COMBUSTION-AIR
Fig. 39—Sidewall Termination of 12 in. or More
Concentric Vent/Air Termination Kit
1. Determine location for termination.
Consideration of the following should be made when deter-
mining an appropriate location for termination kit.
a. Comply with all clearance requirements as stated in Table
5.
b. Termination kit should be positioned where vent vapors
will not damage plants/shrubs or air conditioning equip-
ment.
c. Termination kit should be positioned so it will not be
affected by wind eddy (such as inside building comers) or
that may allow recirculation of flue gases, airborne leaves,
or light snow.
d. Termination kit should be positioned where it will not be
damaged by or subjected to foreign objects, such as stones,
balls, etc.
e. Termination kit should be positioned where vent vapors are
not objectionable.
30
COMBUSTION
AIR
12" MINIMUM
12 IN. SEPARATION
BETWEEN BOTTOM OF
COMBUSTION AIR AND
BOTTOM OF VENT
MAINTAIN 12 IN.
CLEARANCE
ABOVE HIGHEST
ANTICIPATED SNOW
LEVEL OR GRADE,
WHICHEVER IS
GREATER.
A87224
A87225