b. Install removed clamp and plug into UPPER collector box drain tube (blue label) which was previously connected to condensate trap.
c. Connect LOWER collector box drain tube (blue and white striped label) to condensate trap. Tube does not need to be cut.
d. 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 extension tube (violet label and factory-supplied in loose parts bag) to connect LOWER inducer housing drain
connection to condensate trap.
e. Determine appropriate length, cut, and connect tube to condensate trap.
f. Clamp tube to prevent any condensate leakage.
3. Relief Port Tube
Refer to Pressure Switch Tubing section for connection procedure.
C.
Condensate Trap Field Drain Attachment
Refer to Condensate Drain section for recommendations and procedures.
D.
Pressure Switch Tubing
One collector box pressure tube (pink label) is factory connected to the pressure switch for use when furnace is installed in UPFLOW applications.
This tube MUST be disconnected and used for the condensate trap relief port tube. The other collector box pressure tube (green label) which was
factory connected to the condensate trap relief port connection MUST be connected to the pressure switch in DOWNFLOW or HORIZONTAL
RIGHT applications.
NOTE:
See Fig. 13 or tube routing label on main furnace door to check for proper connections.
Relocate tubes as described below.
1. Disconnect collector box pressure tube (pink label) attached to pressure switch.
2. Extend collector box pressure tube (green label) which was previously connected to condensate trap relief port connection by splicing to
small diameter tube (factory-supplied in loose parts bag).
3. Route extended collector box pressure tube behind inducer motor bracket then between inducer motor and pressure switch.
4. Connect collector box pressure tube (green label) to pressure switch connection labeled COLLECTOR BOX.
5. Use remaining smaller diameter tube (factory-supplied in loose parts bag) to extend collector box pressure tube (pink label) which was
previously connected to pressure switch.
6. Route this extended tube (pink label) to condensate trap relief port connection.
7. Determine appropriate length, cut, and connect tube.
8. Clamp tube to relief port connection.
E.
Condensate Trap Freeze Protection
Refer to Condensate Drain Protection section for recommendations and procedures.
F.
Construct a Working Platform
Construct working platform where all required furnace clearances are met. (See Fig. 2 and 11 or 12.)
CAUTION: UNIT MAY NOT OPERATE
Failure to follow this caution may result in intermittent unit operation.
The condensate trap MUST be installed below furnace. See Fig. 5 for dimensions. The drain connection to condensate trap must also
be properly sloped to an open drain.
NOTE:
Combustion-air and vent pipes are restricted to a minimum length of 5 ft. (See Table 9 or 11.)
NOTE:
A 12-in. minimum offset pipe section is recommended with short (5 to 8 ft) vent systems. This recommendation is to reduce excessive
condensate droplets from exiting the vent pipe. (See Fig. 11, 12, and 40.)
NOTE:
The 140 Size unit may not be installed in non-direct vent applications.
—16—