-- 11 --
NOTE
: On 17-1/2-in. (445 mm) wide furnaces ONLY, cut tube
between corrugated sections to prevent kinks from occurring.
2. Inducer Housing Drain Tube
a. Remove and discard LOWER (molded) inducer
housing drain tube which was previously connected to
condensate 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 the
condensate trap.
c. Determine appropriate length, cut, and connect tube.
d. Clamp tube to prevent any condensate leakage.
3. Relief Port Tube
e. Connect relief port tube (green label) to
condensate trap.
f. Extend this tube (if required) by splicing to small
diameter tube (factory-supplied in loose parts bag).
g. Determine appropriate length, cut, and connect tube.
CONDENSATE TRAP FIELD DRAIN ATTACHMENT
Refer to Condensate Drain section for recommendations
and procedures.
PRESSURE SWITCH TUBING
The LOWER collector box pressure tube (pink label) is
factory connected to the pressure switch and should not require
any modification.
NOTE
: See Fig. 6 or 7 or tube routing label on main furnace
door to check for proper connections.
UPPER COLLECTOR BOX AND INDUCER
HOUSING (UNUSED) DRAIN CONNECTIONS
Upper Collector Box Drain Connection
Attached to the UPPER collector box drain connection is a
factory-installed corrugated, plugged tube (blue and white striped
label). This tube is plugged to prevent condensate leakage in this
application. Ensure this tube is plugged.
NOTE
: See Fig. 6 or 7 or tube routing label on main furnace
door to check for proper connections.
Upper Inducer Housing Drain Connection
Attached to the UPPER (unused) inducer housing drain
connection is a cap and clamp. This cap is used to prevent
condensate leakage in this application. Ensure this connection
is capped.
NOTE
: See Fig. 6 or 7 or tube routing label on main furnace
door to check for proper connections.
CONDENSATE TRAP FREEZE PROTECTION
Refer
to
Condensate
Drain
Protection
section
for
recommendations and procedures.
Step 3 -- Downflow Applications
A downflow furnace application is where furnace blower is
located above combustion and controls section of furnace, and
conditioned air is discharged downwards.
CONDENSATE TRAP LOCATION
The condensate trap must be removed from the factory-installed
blower shelf location and relocated in selected application
location as shown in Fig. 2, 8, or 9.
To relocate condensate trap from the blower shelf to desired
location, perform the following:
1. Remove 3 tubes connected to condensate trap.
2. Remove trap from blower shelf by gently pushing tabs
inward and rotating trap.
3. Install casing hole filler cap (factory-supplied in loose
parts bag) into blower shelf hole where trap was removed.
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 combustion
products being drawn in from appliances in the
equipment room.
!
WARNING
4. Install condensate trap into desired casing hole by
inserting tube connection stubs through casing hole and
rotating until tabs snap into locking position.
5. Fill unused condensate trap casing holes with plastic filler
caps (factory-supplied in loose parts bag).
CONDENSATE TRAP TUBING
NOTE
: See Fig. 8 or 9 or tube routing label on main furnace
door to check for proper connections.
1. Collector Box Drain Tube
a. Remove factory-installed plug from LOWER collector
box drain tube (blue and white striped label).
b. Install removed clamp and plug into UPPER collector
box drain tube (blue label) which was connected to
condensate trap.
c. Connect LOWER collector box drain connection to
condensate trap.
(3.) Condensate Trap Located on Left Side of Casing
a. Connect LOWER collector box drain tube (blue
and white striped label) to condensate trap.
Tube does not need to be cut.
b. Clamp tube to prevent any condensate leakage.
(4.) Condensate Trap Located on Right Side of Casing
a. Install drain tube coupling (factory-supplied in
loose parts bag) into collector box drain tube
(blue and white striped label) which was
previously plugged.
b. Connect
larger
diameter
drain
tube
(factory-supplied in loose parts bag) to drain
tube coupling, extending collector box drain
tube for connection to condensate trap.
c. Route extended collector box drain tube
directly from collector box drain to condensate
trap as shown in Fig. 9.
d. Determine appropriate length and cut.
e. Connect to condensate trap.
f. Clamp tube to prevent any condensate leakage.
2. Inducer Housing Drain Tube
a. Remove factory-installed cap and clamp from LOWER
inducer housing drain connection.
b. Remove and discard UPPER (molded) inducer housing
drain tube which was previously connected to
condensate trap.
c. Install cap and clamp on UPPER inducer housing drain
connection where molded drain tube was removed.
d. Use inducer housing drain tube (violet label and
factory-supplied in loose parts bag) to connect
LOWER inducer housing drain connection to the
condensate trap.
58MCB
