Bryant 345MAV instruction manual ÐAttic Location and Working Platform

A 3-IN. MINIMUM CLEARANCE

TO COMBUSTION-AIR INTAKE

IS REQUIRED.

COMBUSTION–AIR

INTAKE

5 3⁄4″

MANUAL

SHUTOFF

GAS VALVE

SEDIMENT

TRAP

CONDENSATE

TRAP

VENT

A 12-IN. MIN HORIZONTAL PIPE SECTION IS RECOMMENDED WITH SHORT (5 TO 8 FT) VENT SYSTEMS TO REDUCE EXCESSIVE CONDENSATE DROPLETS FROM

30-IN. MIN EXITING THE VENT PIPE. WORK AREA

ACCESS OPENING

FOR TRAP

DRAIN

NOTE: LOCAL CODES MAY REQUIRE A DRAIN PAN UNDER THE

FURNACE AND CONDENSATE TRAP WHEN A CONDENSING

FURNACE IS INSTALLED ABOVE FINISHED CEILINGS.

A96184

Fig. 10ÐAttic Location and Working Platform

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 11.)

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. 11 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).

b.Install removed clamp and plug into UPPER collector box drain tube (blue label) which was previously con- nected to condensate trap.

c.Connect LOWER collector box drain tube (blue and white striped label) to condensate trap. Tube does not need to be cut.

d.Clamp tube to prevent any condensate leakage.

2.Inducer Housing Drain Tube

a.Remove factory-installed cap and clamp from LOWER inducer housing drain connection.

b.Remove and discard UPPER (molded) inducer housing drain tube which was previously connected to conden- sate trap.

Ð10Ð

c.Install cap and clamp on UPPER inducer housing drain connection where molded drain tube was removed.

d.Use inducer housing drain extension tube (violet label and factory-supplied in loose parts bag) to connect LOWER inducer housing drain connection to conden- sate trap.

e.Determine appropriate length, cut, and connect tube to condensate trap.

f.Clamp tube to prevent any condensate leakage.

3.Relief Port Tube

Refer to Pressure Switch Tubing section for connection procedure.

C.Condensate Trap Field Drain Attachment

Refer to Condensate Drain section for recommendations and procedures.

D. 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.