Property Damage, Construct a Working Platform

355CAV

!CAUTION

PROPERTY DAMAGE

Failure to follow this caution may result in property damage.

Local codes may require a drain pan under entire furnace and condensate trap when a condensing furnace is used in an attic application or over a finished ceiling.

NOTE: In Canada, installations shall be in accordance with current NSCNGPIC and/or local codes.

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 11.

To relocate condensate trap from the blower shelf to desired location, perform the following:

1.Remove three tubes connected to condensate trap.

2.Remove trap from blower shelf by gently pushing tabs in- ward and rotating trap.

3.Remove casing hole filler cap from casing hole. (See Fig. 2 or 11.)

4.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.

5.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.

6.Fill unused condensate trap casing holes with plastic filler caps (factory-supplied in loose parts bag).

Condensate Trap Tubing

NOTE: See Fig. 11 or tube routing label on main furnace door to check for proper connections.

1.Collector Box Drain Tube

a.Install drain tube coupling (factory-supplied in loose parts bag) into collector box drain tube (blue label) which was previously connected to condensate trap.

b.Connect large diameter drain tube and clamp (factory- supplied in loose parts bag) to drain tube coupling, ex- tending 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 con- nected 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 connec- tion to condensate trap.

(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 previ- ously connected to condensate trap by splicing to small diameter tube (factory-supplied in loose parts bag).

b.Route extended collector box pressure tube to relief port connection on condensate trap.

c.Determine appropriate length, cut, and connect tube.

d.Clamp tube to prevent any condensate leakage.

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 High 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 for 060 and 080 heating input furnaces.

NOTE: See Fig. 11 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) at- tached to High Pressure Switch.

2.Use smaller diameter tube (factory-supplied in loose parts bag) to extend tube disconnected in Item 1.

3.Route extended tube:

a.Behind inducer housing.

b.Between blower shelf and inducer housing.

4.Determine appropriate length, cut, and reconnect tube to High Pressure Switch connections labeled COLLECTOR BOX.

Condensate Trap Freeze Protection

Refer to Condensate Drain Protection section for recommendations and procedures.

Construct a Working Platform

Construct working platform where all required furnace clearances are met. (See Fig. 3 and 12 or 13.)

!CAUTION

UNIT OPERATION HAZARD

Failure to follow this caution may result in intermittent unit operation.

The condensate trap MUST be installed below furnace. See Fig. 6 for dimensions. The drain connection to condensate trap must also be properly sloped to an open drain.

NOTE: A 12-in. (305 mm) minimum offset pipe section is recommended with short (5 to 8 ft. or 1.5M to 2.4M) vent systems. This recommendation is to reduce excessive condensate droplets from exiting the vent pipe. (See Fig. 12, 13, or 44.)