IV. HORIZONTAL LEFT
A horizontal left furnace application is where furnace blower is located to the right of combustion and controls section of furnace, and conditioned air is discharged to the left.
NOTE: The auxiliary junction box
A. Condensate Trap Location
The condensate trap must be removed from the
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
WARNING: Casing hole filler cap must be installed in blower shelf hole when condensate trap is relocated. Failure to follow this warning could result in electrical shock, fire, personal injury or death.
4.Install condensate trap into
5.Fill unused condensate trap casing holes with plastic filler caps
B.Condensate Trap Tubing
NOTE: See Fig. 10 or tube routing label on main furnace door to check for proper connections.
1.Collector Box Drain Tube
a.Install drain tube coupling
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
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 the condensate trap by splicing to small diameter tube
b.Route extended collector box pressure tube to relief port connection on the 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 pressure switch for use when furnace is installed in UPFLOW applications. This tube MUST be disconnected, extended, rerouted, and then reconnected to the pressure switch in HORIZONTAL LEFT applications.
NOTE: See Fig. 10 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 pressure switch.
2.Use smaller diameter tube
3.Route extended tube:
a.Behind inducer housing.
b.Between blower shelf and inducer housing.
c.Behind inducer motor bracket.
d.Between inducer motor and pressure switch.
4.Determine appropriate length, cut, and reconnect tube to pressure switch connection labeled COLLECTOR BOX.
E.Condensate Trap Freeze Protection
Refer to Condensate Drain Protection section for recommenda- tions and procedures.
F. Construct a Working Platform
Construct working platform where all required furnace clearances are met. (See Fig. 3 and 11.)
→CAUTION: 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. Failure to follow this caution will result in intermittent unit operation.
NOTE:
NOTE: A
V.HORIZONTAL RIGHT
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: 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. Failure to follow this caution will result in minor property damage.
NOTE: In Canada, installations shall be in accordance with current NSCNGPIC Installation Codes and/or local codes. NOTE: The auxiliary junction box