Bryant 340MAV instruction manual Ð9Ð, Construct a Working Platform

CAUTION: 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.

NOTE: The auxiliary junction box (J-Box) MUST be relocated to opposite side of furnace casing. (See Fig. 9.) 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 9.

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.Remove casing hole filler cap from casing hole. (See Fig. 2 or 9.)

4.Install casing hole filler cap into blower shelf hole where trap was removed.

5.Install condensate trap into casing hole by inserting tube connection stubs through casing hole and rotating until tabs snap into locking position.

B.Condensate Trap Tubing

NOTE: See Fig. 9 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, 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 factory-supplied in loose parts bag) to connect LOWER inducer housing drain connection to the con- densate 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 previously connected to the 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 the condensate trap.

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

d.Clamp tube to prevent any condensate leakage.

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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. 9 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 (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.

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 10.)

CAUTION: 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: Combustion-air and vent pipes are restricted to a mini- mum length of 5 ft. (See Table 6.)

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. 10 or 28.)

V.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: 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.

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 11.

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