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MANUAL
SHUTOFF
GAS VALVE
SEDIMENT
TRAP
NOTE: LOCAL CODES MAY REQUIRE A DRAIN PAN UNDER THE
FURNACE AND CONDENSATE TRAP WHEN A CONDENSING
FURNACE IS INSTALLED ABOVE FINISHED CEILINGS.
Fig. 11 - - Attic Location and Working Platform for Direct Vent (2-Pipe) Applications--All Sizes
A 3-IN.(76mm) MINIMUM CLEARANCE
TO COMBUSTION-AIR INTAKE
IS REQUIRED.
COMBUSTION AIR
INTAKE
MANUAL
SHUTOFF
GAS VALVE
SEDIMENT
TRAP
NOTE: LOCAL CODES MAY REQUIRE A DRAIN PAN UNDER THE
FURNACE AND CONDENSATE TRAP WHEN A CONDENSING
FURNACE IS INSTALLED ABOVE FINISHED CEILINGS.
Fig. 12 - - Attic Location and Working Platform for Non-Direct Vent (1-pipe) Applications-Sizes 040 Through 120 Only
COMBUSTION - AIR
INTAKE
"
3
(146 mm)
5
/
4
CONDENSATE
TRAP
3
5
/
IN. (146mm)
4
CONDENSATE
TRAP
- - 14 - -
VENT
A 12-IN. (305 mm) MIN HORIZONTAL PIPE
SECTION IS RECOMMENDED WITH
SHORT (5 TO 8 FT / 1.5 TO 2.4 M) VENT
SYSTEMS TO REDUCE EXCESSIVE
CONDENSATE DROPLETS FROM
EXITING THE VENT PIPE.
"
30
(762 mm)MIN
WORK AREA
ACCESS OPENING
FOR TRAP
DRAIN
VENT
A 12-IN. (305mm) MIN HORIZONTAL PIPE
SECTION IS RECOMMENDED WITH
SHORT (5 TO 8 FT / 1.5 TO 2.4M) VENT
SYSTEMS TO REDUCE EXCESSIVE
CONDENSATE DROPLETS FROM
EXITING THE VENT PIPE.
30-IN. (762mm) MIN
WORK AREA
ACCESS OPENING
FOR TRAP
DRAIN
A93031
A96184
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