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8
APPLICATIONS
General
Some assembly and modifications are required for furnaces
installed in any of the four applications shown in Fig. 1. All
drain and pressure tubes are connected as shown in Fig. 7. See
appropriate application instructions for these procedures.
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in property
damage.
Local codes may require a drain pan under entire furnace
and condensate trap when a condensing furnace is used in
an attic application or over a finished ceiling.
CAUTION
!
NOTE: In Canada, installations shall be in accordance with
current CAN/CSA--B149.1-- 05 and/or local codes.
UPFLOW APPLICATION
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 (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 section for drain tube extension details. (See Fig. 6.)
Condensate Trap Tubing (Factory -- Shipped
Orientation)
NOTE: See Fig. 7 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 applica-
tions. These tubes can be identified by their connection
location and also by a c olor 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:
f. Determine location of field drain connection. (See Fig.
2or7.)
NOTE: If internal filter or side filter/media cabinet is used, drain
tube should be located to opposite side of casing from return duct
attachment to assist in filter removal.
g. Remove and discard casing drain hole plug button from
desired side.
h. Installdrain tubecouplinggrommet (factory -- suppliedin
loose parts bag) in selected casing hole.
i. Slidedrain tubecoupling (factory--supplied inlooseparts
bag) through grommet so long end of coupling faces
blower.
j. Cement 2factory--supplied 1/2--in.(13 mm)streetCPVC
elbowstorigiddraintubeconnectionon condensatetrap.
(See Fig. 7.) These elbows must be cemented together
and cemented to condensate trap drain connection.
355CAV