Multiventing And Vent Terminations - Carrier 58MXA Nstallation, Start-Up, And Operating Instructions

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)
2. Cut one 4-in. diameter hole for 2-in. kit, or one 5-in. diameter
hole for 3-in. kit.
3. Loosely assemble concentric vent/air termination components
together using instructions in kit.
4. Slide assembled kit with rain shield REMOVED through hole.
NOTE: Do not allow insulation or other materials to accumulate
inside of pipe assembly when installing it through hole.
Roof terminations—Locate assembly through roof to appropriate
height as shown in Fig. 37.
Sidewall terminations—Locate assembly through sidewall with
rain shield positioned no more than 1-in. from wall as shown in
Fig. 38.
5. Disassemble loose pipe fittings. Clean and cement using same
procedures as used for system piping.
6. Check required dimensions as shown in Fig. 37 or 38.

MULTIVENTING AND VENT TERMINATIONS

When 2 or more 58MXA Furnaces are vented near each other,
each furnace must be individually vented. NEVER common vent
or breach vent 58MXA furnaces. When 2 or more 58MXA
furnaces are vented near each other, 2 vent terminations may be
installed as shown in Fig. 41, 42, 43, 44, and 45, but next vent
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
ROOF
18" MAXIMUM
BRACKET
COUPLING
VENT
Fig. 38—Concentric Vent and Combustion-Air Side
termination must be at least 36 in. away from first 2 terminations.
It is important that vent terminations be made as shown to avoid
recirculation of flue gases. Dimension "A" in Fig. 41, 42, 43, 44,
and 45 represents distance between pipes or rain shields, as
touching or 2-in. maximum separation.
30
COMBUSTION
AIR
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
A87224
A93055