WARNING:
CARBON MONOXIDE POISONING
HAZARD
Failure to follow this warning could result in personal
injury or death.
Casing hole filler cap must be installed in blower shelf
hole when condensate trap is relocated to prevent com-
bustion products being drawn in from appliances in the
equipment room.
5. Install condensate trap into left-hand side casing hole by
inserting tube connection stubs through casing hole and
rotating until tabs snap into locking position.
6. Fill unused condensate trap casing holes with plastic filler
caps (factory-supplied in loose parts bag).
B.
Condensate Trap Tubing
NOTE:
See Fig. 11 or tube routing label on main furnace door to
check for proper connections.
1. Collector Box Drain Tube
a. Install drain tube coupling (factory-supplied in loose
parts bag) into collector box drain tube (blue label)
which was previously connected to condensate trap.
b. Connect large diameter drain tube and clamp (factory-
supplied in loose parts bag) to drain tube coupling,
extending collector box drain tube.
c. Route extended tube (blue label) to condensate trap and
cut to appropriate length.
d. Clamp tube to prevent any condensate leakage.
2. Inducer Housing Drain Tube
a. Remove and discard LOWER (molded) inducer housing
drain tube which was previously connected to conden-
sate trap.
b. Use inducer housing drain extension tube (violet label
and factory-supplied in loose parts bag) to connect
LOWER inducer housing drain connection to conden-
sate trap.
c. Determine appropriate length, cut, and connect tube.
d. Clamp tube to prevent any condensate leakage.
3. Relief Port Tube
a. Extend collector box tube (green label) which was
previously connected to condensate trap by splicing to
small diameter tube (factory-supplied in loose parts bag).
b. Route extended collector box pressure tube to relief port
connection on condensate trap.
c. Determine appropriate length, cut, and connect tube.
d. Clamp tube to prevent any condensate leakage.
C.
Condensate Trap Field Drain Attachment
Refer to Condensate Drain section for recommendations and
procedures.
D.
Pressure Switch Tubing
The LOWER collector box pressure tube (pink label) is factory
connected to the High Pressure Switch for use when furnace is
installed in UPFLOW applications. This tube MUST be discon-
nected, extended, rerouted, and then reconnected to the pressure
switch in HORIZONTAL LEFT applications for 060 and 080
heating input furnaces.
NOTE:
See Fig. 11 or tube routing label on main furnace door to
check for proper connections.
Modify tube as described below.
1. Disconnect collector box pressure tube (pink label) attached
to High Pressure Switch.
2. Use smaller diameter tube (factory-supplied in loose parts
bag) to extend tube disconnected in item 1.
Fig. 12—Attic Location and Working Platform
A93031
COMBUSTION – AIR
INTAKE
VENT
MANUAL
SHUTOFF
GAS VALVE
SEDIMENT
TRAP
CONDENSATE
TRAP
DRAIN
ACCESS OPENING
FOR TRAP
30
″
MIN
WORK AREA
A 12-IN. MIN HORIZONTAL PIPE
SECTION IS RECOMMENDED WITH
SHORT (5 TO 8 FT) VENT SYSTEMS
TO REDUCE EXCESSIVE
CONDENSATE DROPLETS FROM
EXITING THE VENT PIPE.
5
3
⁄
4
″
NOTE: LOCAL CODES MAY REQUIRE A DRAIN PAN UNDER THE
FURNACE AND CONDENSATE TRAP WHEN A CONDENSING
FURNACE IS INSTALLED ABOVE FINISHED CEILINGS.
—11—
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Summary of Contents for CONDENSING GAS FURNACE 355MAV
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