NOTE:
Combustion-air and vent pipes are restricted to a minimum length of 5 ft. (See Table 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, or 40.)
NOTE:
The 140 Size unit may not be installed in non-direct vent applications.
PROCEDURE 5—HORIZONTAL RIGHT (SUPPLY-AIR DISCHARGE) APPLICATIONS
A horizontal right furnace application is where furnace blower is located to the left of combustion and controls section of furnace, and conditioned
air is discharged to the right.
CAUTION: MINOR PROPERTY DAMAGE
Failure to follow this caution may result in minor property damage.
Local codes may require a drain pan under entire furnace and condensate trap when a condensing furnace is used in attic application
or over a finished ceiling.
NOTE:
In Canada, installations shall be in accordance with current NSCNGPIC Installation Codes and/or local codes.
NOTE:
The auxiliary junction box (J-Box) MUST be relocated to opposite side of furnace casing. (See Fig. 13.) See Electrical Connection section
for J-Box relocation.
A.
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 or 13.
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.
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 combustion products being
drawn in from appliances in the equipment room.
4. 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.
5. Fill unused condensate trap casing holes with plastic filler caps (factory-supplied in loose parts bag).
B.
Condensate Trap Tubing
NOTE:
See Fig. 13 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).
Fig. 13—Horizontal Right Tube Configuration
A00214
PLUG
COLLECTOR BOX DRAIN TUBE
(BLUE AND WHITE STRIPED)
INDUCER HOUSING
DRAIN TUBE (VIOLET)
COLLECTOR BOX
EXTENSION TUBE
COLLECTOR BOX TUBE (GREEN)
CAP
COLLECTOR BOX DRAIN TUBE (BLUE)
COLLECTOR BOX TUBE (PINK)
CONDENSATE
TRAP
COLLECTOR BOX EXTENSION TUBE
AUXILARY “J” BOX RELOCATED HERE
—15—
