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COLLECTOR BOX DRAIN TUBE
(BLUE AND WHITE STRIPED)
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. 11 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. Use smaller diameter tube (factory-supplied in loose parts
bag) to extend collector box pressure tube (green label) which
was previously connected to condensate trap relief port
connection.
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.
CONDENSATE TRAP FREEZE PROTECTION
Refer to Condensate Drain Protection section for recommenda-
tions and procedures.
CAP
PLUG
INDUCER HOUSING
DRAIN TUBE (VIOLET)
COLLECTOR BOX
EXTENSION TUBE
→ Fig. 11—Horizontal Right Tube Configuration
COLLECTOR BOX DRAIN TUBE (BLUE)
COLLECTOR BOX TUBE (GREEN)
COLLECTOR BOX EXTENSION TUBE
COLLECTOR BOX TUBE (PINK)
CONSTRUCT A WORKING PLATFORM
Construct working platform where all required furnace clearances
are met. (See Fig. 3 and 10.)
The condensate trap MUST be installed below furnace. See
Fig. 4 for dimensions. The drain connection to condensate
trap must also be properly sloped to an open drain.
NOTE: Vent pipe length is restricted to a minimum of 5 ft. (See
Table 4.)
NOTE: A 12-in. minimum horizontal pipe section is recom-
mended with short (5 to 8 ft) vent systems. This recommendation
is to reduce excessive condensate droplets from exiting the vent
pipe. (See Fig. 10 or 33.)
Step 1—General
When a furnace is installed so that supply ducts carry air to areas
outside the space containing the furnace, return air must also be
handled by ducts sealed to furnace casing. The ducts terminate
outside the space containing the furnace to ensure there will not be
a negative pressure condition within equipment room or space.
This furnace must be installed so electrical components are
protected from water.
Locate furnace as close to center of air distribution system as
possible.
Locate furnace so vent pipe maximum length is not exceeded.
Refer to Table 4—Maximum Allowable Pipe Length.
Provide ample space for servicing and cleaning. Always comply
with minimum fire protection clearances shown on unit's clear-
ance to combustibles label. (See Fig. 3.) Locate furnace where
available electric power and gas supplies meet specifications on
furnace rating plate.
11
CONDENSATE
TRAP
LOCATION
A93303
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