Carrier 58MVP 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. 38—Concentric Vent and Combustion-Air Roof
Termination (Preferred)
OVERHANG OR ROOF
12" MINIMUM
VENT
90°
BRACKET
COMBUSTION-AIR
Fig. 40—Sidewall Termination of 12 in. or More
COUPLING
AIR AND VENT
8 3 / 4 " FOR 3" KIT
6 3 / 4 " FOR 2" KIT
MAINTAIN 12 IN. MINIMUM
Fig. 37—Roof Termination (Preferred)
VENT
COMBUSTION
AIR
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.
ROOF
18" MAXIMUM
BRACKET
VENT
A93054
Fig. 39—Concentric Vent and Combustion-Air Side
90°
BRACKET
COUPLING
COMBUSTION-AIR
(ELBOW PARALLEL
TO WALL)
A87225
Fig. 41—Sidewall Termination of Less than 12 in.
30
COMBUSTION
AIR
A87224
OVERHANG OR ROOF
12" MINIMUM
1" MAXIMUM
COMBUSTION-AIR
VENT
MAINTAIN 12 IN.
CLEARANCE
ABOVE HIGHEST
ANTICIPATED SNOW
LEVEL OR GRADE,
WHICHEVER IS
GREATER.
Termination
OVERHANG OR ROOF
12" MINIMUM
VENT
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.
A93055
A87226