Instruction manual
16
7.
Upflow
and
Counterflow
units
.
For upright installations, externally mount the rub-
ber elbow 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 in-
stalled on the same side of the unit as the flue pipe.
8.
Upflow
and
Counterflow
units
.
For
horizontal installations
, externally secure the
field-supplied 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
Alternate Vent/Flue Location
Alternate Combustion Air Intake Location
The alternate combustion air intake location is the large
hole
not
in line with the induced draft blower outlet. To use
the alternate combustion air intake location, refer to the
following steps, and the “Alternate Combustion Air Intake
Location” figure.
NOTE: Counterflow unit instructions follow the upflow
instructions.
1. Remove and save the four screws securing the com-
bustion air intake coupling to the furnace’s top panel
(upflow).
Counterflow
units.
Remove and save the four screws securing the com-
bustion air intake coupling to the basepan. Remove an
additional three screws securing the furnace’s internal
combustion air intake pipe to the blower deck.
2. Remove the combustion air intake coupling and gas-
ket from the top panel.
Counterflow
units.
Remove the combustion air intake pipe from the fur-
nace and cut the pipe at the basepan coupling. Save
the basepan coupling and gasket from the blower deck
coupling for use in the alternate location. Discard the
remaining pipe.
3. Remove plastic plug from alternate combustion air
intake location. Relocate and install plug in standard
air intake location (top cover).
Counterflow
units.
Remove plastic plug from alternate combustion air
intake location. Relocate and install plug in standard
air intake location (basepan). Plug the remaining hole
in the blower deck with the plastic plug included in the
drain kit bag.
4.
Upflow
and
Counterflow
units.
With the gasket facing the cabinet side panel, and the
flange’s flat spot facing forward, secure the combus-
tion air intake coupling to the cabinet using the screws
removed in step 1 or with field-supplied 3/8” #8 self -
drilling screws.
CAUTION
Be sure not damage internal wiring or other
components, when reinstalling coupling
and screws.
5.
Upflow
and
Counterflow
units.
For
non-direct vent installations
installed
horizon-
tally
, a minimum of one 90° elbow must be installed on
the combustion air intake coupling to guard against
inadvertent blockage. No elbow is required on the
alternate combustion air intake of
upright
installations,
however, a minimum clearance of 2 inches is required
to assure proper air supply.
6.
Upflow
and
Counterflow
units.
For
direct vent installations
, secure field-supplied
combustion air intake pipe directly to the air intake
coupling.
NOTE: A PVC coupling or elbow is required on
counterflow units.