PRODUCT DESIGN
44
WARNING
T
HE RUBBER ELBOW IS NOT DESIGNED TO SUPPORAT A LOAD.
W
HEN THE
RUBBER ELBOW IS MOUNTED EXTERNALLY TO THE FURNACE CABINET,
EXTREME CARE MUST BE TAKEN TO ADEQUATELY SUPPORT FIELD-SUPPLIED
VENT/FLUE PIPING, AS DAMAGE CAN RESULT IN LEAKS CAUSING BODILY
INJURY OR DEATH DUE TO EXPOSURE TO FLUE GASES, INCLUDING CARBON
MONOXIDE.
For upright installations, externally mount the rubber el-
bow to the vent/flue coupling using a worm gear hose clamp.
Secure field supplied vent/flue piping to the rubber elbow
using a worm gear hose clamp. NOTE: Use of the alternate
vent/flue location for upright installations, requires the drain
trap be installed on the same side of the unit as the flue
pipe.
For horizontal installations, externally secure the field-sup-
plied vent/flue pipe directly to the vent/flue coupling using a
PVC or ABS coupling or elbow.
5
ADDITIONAL PLUG
FROM DRAIN KIT
7
EXTERNALLY
MOUNT
RUBBER ELBOW
6
SECURE TO
ID BLOWER WITH
RUBBER COUPLING
AND HOSE
CLAMPS
*
*
*
**
*
*
M1
2
3P
C
ON
O
F
F
COUNTERFLOW/UPRIGHT
(UPFLOW SIMILAR)
UPFLOW
REMOVE
4 SCREWS
*
*
*
**
*
*
M1
2
3P
C
ON
O
F
F
3
REMOVE
PIPE
2
DETACH RUBBER
ELBOW FROM
ID BLOWER AND
VENT/FLUE
PIPE
*
*
*
**
*
*
M
1
2
3P
C
ON
O
F
F
1.
REMOVE
4 SCREWS
2
DETATCH RUBBER
ELBOW FROM
ID BLOWER AND
VENT/FLUE
PIPE
COUNTERFLOW
3
REMOVE
PIPE
5
REMOVE
AND RELOCATE
5
REMOVE
AND RELOCATE
1
REMOVE
3 SCREWS
1
UPFLOW/HORIZONTAL
(COUNTERFLOW SIMILAR)
*
*
*
**
*
*
M
123
PC
ON
O
F
F
6
SECURE TO
ID BLOWER WITH
RUBBER COUPLING
AND HOSE
CLAMPS
6
SECURE TO
CABINET WITH
SCREWS
90% Furnace Alternate Vent/Flue Location
Alternate Combustion Air Intake Location (90% Fur-
naces Only)
NOTE: Alternate combustion fresh air inlet location on the
right hand panel side of 90% furance models was
discontinued since November 2005).
The alternate combustion air intake location is the large hole
not in line with the induced draft blower outlet. Refer to the
following "Alternate Combustion Air Intake Location” figure
for details.
CAUTION
B
E SURE NOT TO DAMAGE INTERNAL WIRING OR OTHER COMPONENTS WHEN
REINSTALLING COUPLING AND SCREWS.
For non-direct vent installations installed horizontally, a
minimum of one 90° elbow must be installed on the com-
bustion air intake coupling to guard against inadvertent block-
age. No elbow is required on the alternate combustion air
intake of upright installations, however, a minimum clear-
ance of 2 inches is required to assure proper air supply.
For direct vent installations, secure field-supplied combus-
tion air intake pipe directly to the air intake coupling.
ADDITIONAL
PLUG FROM
DRAIN KIT
SECURE
TO CABINET
UPFLOW/HORIZONTAL SHOWN
(COUNTERFLOW SIMILAR)
REMOVE
3 SCREWS
REMOVE
4 SCREWS
REMOVE
4 SCREWS
REMOVE
AND
RELOCATE
.
REMOVE
AND
RELOCATE
REMOVE
AND CUT
REMOVE
UPFLOW
COUNTERFLOW
5
4
1
2
2
3
3
1
1
3
2" CLEARANCE
REQUIRED
(NON-DIRECT
VENT)
5
90% Furnace Alternate Combustion
Air Intake Location
Non-Direct Vent (Single Pipe) Piping (90% Furnaces
Only)
Non-direct vent installations require only a vent/flue pipe.
The vent pipe can be run horizontally with an exit through
the side of the building or run vertically with an exit through
the roof of the building. The vent can also be run through an
existing unused chimney; however, it must extend a mini-
mum of 12 inches above the top of the chimney. The space