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APPLICATIONS
Step 1—General
Some assembly and modifications are required for furnaces
installed in any of the 4 applications shown in Fig. 1. All drain and
pressure tubes are connected as shown in Fig. 5. See appropriate
application instructions for these procedures.
Step 2—Upflow Applications
An upflow furnace application is where furnace blower is located
below combustion and controls section of furnace, and conditioned
air is discharged upwards.
CONDENSATE TRAP LOCATION (FACTORY-SHIPPED
ORIENTATION)
The condensate trap is factory installed in the blower shelf and
factory connected for UPFLOW applications. A factory-supplied
tube is used to extend the condensate trap drain connection to the
desired furnace side for field drain attachment. See Condensate
Trap Tubing (Factory-Shipped Orientation) section for drain tube
extension details.
CONDENSATE TRAP TUBING (FACTORY-SHIPPED
ORIENTATION)
NOTE:
See Fig. 5 or tube routing label on main furnace door to
confirm location of these tubes.
1. Collector Box Drain, Inducer Housing Drain, Relief Port, and
Pressure Switch Tubes
These tubes should be factory attached to condensate trap and
pressure switch ready for use in UPFLOW applications. These
tubes can be identified by their connection location and also
by a color label on each tube. These tubes are identified as
follows: collector box drain tube (blue label), inducer housing
drain tube (violet label or molded), relief port tube (green
label), and pressure switch tube (pink label).
2. Condensate Trap Drain Tube
The condensate trap drain connection must be extended for
field attachment by doing the following:
a. Determine location of field drain connection. (See Fig. 2 or
5.)
NOTE:
If internal filter or side filter/media cabinet is used, drain
tube should be located to opposite side of casing of return duct
attachment to assist in filter removal.
b. Remove and discard casing drain hole plug button from
desired side.
c. Install drain tube coupling grommet (factory-supplied in
loose parts bag) in selected casing hole.
d. Slide drain tube coupling (factory-supplied in loose parts
bag) through grommet so long end of coupling faces
blower.
Fig. 4—Condensate Trap
A93026
1
⁄
2
OD
INDUCER HOUSING
DRAIN CONNECTION
1
⁄
4
OD
COLLECTOR BOX TO
TRAP RELIEF PORT
5
⁄
8
OD
COLLECTOR BOX
DRAIN CONNECTION
1
⁄
2
-IN. PVC OR CPVC
SCREW HOLE FOR
UPFLOW OR DOWN-
FLOW APPLICATIONS
(OPTIONAL)
1 4
2
7 8
1 8
7
SLOT FOR SCREW
HORIZONTAL
APPLICATION
(OPTIONAL)
WIRE TIE
GUIDES
(WHEN USED)
1 2
1
3 4
1
3 4
FRONT VIEW
SIDE VIEW
FURNACE
DOOR
FURNACE
DOOR
CONDENSATE
TRAP
78
1 4
26
4
FURNACE
SIDE
FURNACE
SIDE
1 2
1
1 4
26
4
3 4
5
3 4
5
4
SIDE VIEW
FRONT VIEW
END VIEW
FRONT VIEW
3 4
DOWNFLOW AND ALTERNATE
EXTERNAL UPFLOW APPLICATIONS
HORIZONTAL
APPLICATIONS
FIELD
DRAIN
CONN
FIELD
DRAIN
CONN
CONDENSATE
TRAP (INSIDE)
BLOWER SHELF
ALTERNATE DRAIN
TUBE LOCATION
UPFLOW APPLICATIONS
CONDENSATE TRAP
DRAIN TUBE LOCATION
5