Bryant 355M-40-4 Operations Instructions

NOTE: Read the entire instruction manual before starting theinstallation.This symbol → indicates a change since the last issue.Index PageDIMENSIONAL D

B. Condensate Trap TubingNOTE: See Fig. 11 or tube routing label on main furnace door tocheck for proper connections.1. Collector Box Drain Tubea. Rem

5. Route this extended tube (pink label) to condensate traprelief port connection.6. Determine appropriate length, cut, and connect tube.7. Clamp tube

Provide ample space for servicing and cleaning. Always complywith minimum fire protection clearances shown on unit’s clear-ance to combustibles label.

IV. HAZARDOUS LOCATIONSINSTALLATIONI. LEVELING LEGS (IF DESIRED)When furnace is used in upflow position with side inlet(s), levelinglegs may be desire

TABLE 1—OPENING DIMENSIONS (IN.)FURNACECASINGWIDTHAPPLICATIONPLENUM OPENING FLOOR OPENINGABCD17-1/2Upflow Applications 16 24-1/8 16-5/8 24-3/4Downflow

III. INSTALLATION IN HORIZONTAL APPLICATIONSThese furnaces can be installed horizontally in either horizontalleft or right discharge position. In a cr

IV. FILTER ARRANGEMENTCAUTION: Never operate unit without a filter or withblower access panel removed.Factory-supplied washable framed filters are shi

VI. GAS PIPINGGas piping must be installed in accordance with national and localcodes. Refer to current edition of NFGC. Canadian installationsmust be

NOTE: Proper polarity must be maintained for 115-v wiring. Ifpolarity is incorrect, control center fault code indicator light willflash rapidly and fu

Fig. 24—Wiring DiagramA96276FRSLSALSFSEGVREDCMPBLUBRNGRNHIGRNNOTE #33REDWHTWHTPL1PL712104 612ORNBRNYELGRNBLKWHT3PL9HSI121.5 AMPEAC1EAC2BLKWHT21PL4BLK1

Fig. 2—Dimensional DrawingDIMENSIONS (IN.)UNIT SIZE A D E042040* 24-1/2* 22-7/8* 23*042060 17-1/2 15-7/8 16042080 21 19-3/8 19-1/2060080 21 19-3/8 19-

NOTE: Use AWG No. 18 color-coded copper thermostat wire forlengths up to 100 ft. For wire lengths over 100 ft, use AWG No.16 wire.NOTE: For 2-speed ap

(5.) Insert EAC stripped leads into control center EACterminals by depressing terminal’s arm with ascrewdriver or finger. (See Fig. 26.)(6.) Reinstall

CAUTION: Combustion air must not be taken frominside structure because that air is frequently contami-nated by halogens, which include fluorides, chlo

EXAMPLE:An 042080 size furnace located in Indianapolis, elevation650 ft above sea level, could be installed in an applicationrequiring 3 elbows and 17

TABLE 6—MAXIMUM ALLOWABLE PIPE LENGTH (FT)ALTITUDEUNITSIZETERMINATIONTYPEPIPE DIAMETER(IN.)*NUMBER OF 90° ELBOWS1234560 to 20000420402 Pipe or 2-In.Co

TABLE 6—MAXIMUM ALLOWABLE PIPE LENGTH (FT) ContinuedALTITUDEUNITSIZETERMINATIONTYPEPIPE DIAMETER(IN.)*NUMBER OF 90° ELBOWS12345 66001 to 7000‡0420402

COMBUSTION-AIR INTAKE HOUSING PLUGFITTINGThe combustion-air intake plug fitting must be installed inunused combustion-air intake housing. This fitting

Fig. 34—Sidewall Termination of 12 in. or MoreA87225MAINTAIN 12 IN.CLEARANCEABOVE HIGHESTANTICIPATED SNOWLEVEL OR GRADE,WHICHEVER ISGREATE

contaminants, and has less visible vent vapors. (See Fig. 31 or 32.)Sidewall termination may require sealing or shielding of buildingsurfaces with a c

NOTE: Do not allow insulation or other materials to accumulateinside of pipe assembly when installing it through hole.Roof terminations—Locate assembl

SAFETY CONSIDERATIONSInstalling and servicing heating equipment can be hazardous due togas and electrical components. Only trained and qualified perso

Fig. 39—Sidewall Termination of 12 in. or Less(Dimension "A" is Touching or 2-In.Maximum Separation)A96129ACOMBUSTION AIRCOMBUSTION AIRVEN

SEQUENCE OF OPERATIONCAUTION: Furnace control must be grounded forproper operation, or control will lock out. Control isgrounded through green wire ro

The blower reduces its speed to low-heat RPM. The blowerand EAC remain operating 90, 135, 180, or 225 sec(depending on blower off time selection). The

2. Humidifier—The HUM terminal is energized after inducerprepurge period is completed.3. Ignitor warm up—After prepurge period, HSI is energizedfor 17

VIII. COMPONENT TESTAll components are functionally operated except gas valve withcomponent test feature.This feature helps diagnose a system problem

1. Remove main furnace door and blower access panel.2. Locate CF setup switches on control center. (See Fig. 25.)3. Determine desired continuous fan a

TABLE 10—SETUP SWITCH DESCRIPTIONSETUPSWITCH NO.NORMALPOSITIONDESCRIPTION OF USESW-1(FLT)OFFTurn switch to ON for fault history display. No thermostat

IV. PURGE GAS LINESIf not previously done, purge the lines after all connections havebeen made and check for leaks.WARNING: Never purge a gas line int

TABLE 12—MODEL 355MAV ORIFICE SIZE AND MANIFOLD PRESSURE FOR CORRECT INPUT(TABULATED DATA BASED ON 20,000 BTUH HIGH HEAT/13,000 BTUH LOW HEAT PER BURN

TABLE 12—MODEL 355MAV ORIFICE SIZE AND MANIFOLD PRESSURE FOR CORRECT INPUT Continued(TABULATED DATA BASED ON 20,000 BTUH HIGH HEAT/13,000 BTUH LOW HEA

recharges your body with static electricity (for example; DONOT move or shuffle your feet, DO NOT touch un-grounded objects, etc.).4. If you touch ung

TABLE 12—MODEL 355MAV ORIFICE SIZE AND MANIFOLD PRESSURE FOR CORRECT INPUT Continued(TABULATED DATA BASED ON 20,000 BTUH HIGH HEAT/13,000 BTUH LOW HEA

At altitudes above 2000 ft, this furnace has been ap-proved for a 2 percent derate for each 1000 ft above sealevel. See Table 13 for derate multiplier

B. Set Temperature RiseCAUTION: Temperature rise must be within limitsspecified on unit rating plate. Recommended operation isat midpoint of rise or a

II. CHECK PRESSURE SWITCHESThis control proves operation of the draft inducer. Check switchoperation as follows:1. Turn off 115-v power to furnace.2.

CHECKLIST—INSTALLATIONLOAD CALCULATION____________ Heating Load (Btuh)____________ Cooling Load (Btuh)____________ Furnace Model SelectionCOMBUSTION A

and also by a color label on each tube. These tubes areidentified as follows: collector box drain tube (blue label),inducer housing drain tube (violet

D. Condensate Trap Tubing (Alternate UpflowOrientation)NOTE: See Fig. 6 or tube routing label on main furnace door toconfirm location of these tubes.1

NOTE: See Fig. 5 or 6 or tube routing label on main furnace doorto check for proper connections.H. Condensate Trap Freeze ProtectionRefer to Condensat

b. Remove and discard UPPER (molded) inducer housingdrain tube which was previously connected to conden-sate trap.c. Install cap and clamp on UPPER in

b. Route extended collector box pressure tube to relief portconnection on condensate trap.c. Determine appropriate length, cut, and connect tube.d. Cl