Bryant 4-Way Multipoise Fixed-Capacity Direct-Vent Conden Manuel d'utilisateur

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

1. Remove 3 tubes connected to condensate trap.2. Remove trap from blower shelf by gently pushing tabsinward and rotating trap.3. Remove casing hole f

2. Extend collector box pressure tube (green label) which waspreviously connected to condensate trap relief port connec-tion by splicing to small diam

CAUTION: If these furnaces are used during construc-tion when adhesives, sealers, and/or new carpets arebeing installed, make sure all combustion and

INSTALLATIONI. LEVELING LEGS (IF DESIRED)When furnace is used in upflow position with side inlet(s), levelinglegs may be desired. (See Fig. 12.) Insta

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 LED status indicator light willflash rapidly and fu

Fig. 24—Wiring DiagramA95087PCBBLOWER OFF DELAYSELECTION CHART90 SEC135 SEC180 SEC225 SECGVRHI/LORELAYSEC-1SEC-2WHTPL1321654987LEDTEST/TWINBLOWEROFFDE

Fig. 2—Dimensional DrawingDIMENSIONS (IN.)UNIT SIZE A D E024040 17-1/2 15-7/8 16036040 17-1/2 15-7/8 16024060 17-1/2 15-7/8 16036060 17-1/2 15-7/8 160

III. ACCESSORIES1. Electronic Air Cleaner (EAC)Two quick-connect terminals marked EAC-1 and EAC-2are provided for EAC connection. (See Fig. 25.) These

DIRECT VENTINGThe 340MAV Furnaces require a dedicated (one 340MAV furnaceonly) direct-vent system. In a direct-vent system, all air forcombustion is t

CAUTION: When combustion-air pipe is installedabove a suspended ceiling, pipe must be insulated with3/8-in. thick Armaflex-type insulation. Combustion

f. Drill a 1/8-in. hole in 2-in. combustion-air pipe usinghole in intake housing as a guide.g. Install a field-supplied No. 6 or No. 8 sheet metal scr

TABLE 6—MAXIMUM ALLOWABLE PIPE LENGTH (FT)ALTITUDE UNIT SIZETERMINATIONTYPEPIPE DIA(IN.)*NUMBER OF 90° ELBOWS1234560 to 20000240400360402 Pipe or 2-In

TABLE 6—MAXIMUM ALLOWABLE PIPE LENGTH (FT) ContinuedALTITUDE UNIT SIZETERMINATIONTYPEPIPE DIA(IN.)*NUMBER OF 90° ELBOWS1234 5 64001 to 5000‡0240400360

b. Reposition neoprene inducer housing outlet cap andclamp to appropriate unused inducer housing connec-tion. Tighten clamp.WARNING: Inducer housing o

9. While cement is still wet, twist pipe into socket with 1/4turn. Be sure pipe is fully inserted into fitting socket.10. Wipe excess cement from join

Fig. 33—Sidewall Termination of 12 in. or MoreA87225MAINTAIN 12 IN.CLEARANCEABOVE HIGHESTANTICIPATED SNOWLEVEL OR GRADE,WHICHEVER ISGREATE

2. Cut 2 holes, 1 for each pipe, of appropriate size for pipe sizebeing used.3. Loosely install elbow in bracket and place assembly oncombustion-air p

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

Fig. 38—Sidewall Termination of 12 in. or Less(Dimension "A" is Touching or 2-In. Maximum Separation)A96129ACOMBUSTION AIRCOMBUSTION AIRVE

See Fig. 40 for example of possible field drain attachment using1/2-in. CPVC or PVC tee for vent and A/C or humidifier drainconnection.Outdoor drainin

6. Blower off delay—When thermostat is satisfied, circuitbetween R-W is opened, de-energizing gas valve (stoppinggas flow to burners) and humidifier.

WARNING: Blower access panel door switch opens115-v power to control center. No component operationcan occur. Caution must be taken when manually clos

III. PURGE GAS LINESIf not previously done, purge lines after all connections have beenmade and check for leaks.WARNING: Never purge a gas line into a

→ TABLE 8—MODEL 340MAV ORIFICE SIZE AND MANIFOLD PRESSURE FOR CORRECT INPUTFOR USE WITH 040 THROUGH 120 SIZE FURNACES ONLY(TABULATED DATA BASED ON 20,

→ TABLE 8—MODEL 340MAV ORIFICE SIZE AND MANIFOLD PRESSURE FOR CORRECT INPUT ContinuedFOR USE WITH 040 THROUGH 120 SIZE FURNACES ONLY(TABULATED DATA BA

→ TABLE 8—MODEL 340MAV ORIFICE SIZE AND MANIFOLD PRESSURE FOR CORRECT INPUT ContinuedFOR USE WITH 040 THROUGH 120 SIZE FURNACES ONLY(TABULATED DATA BA

→ TABLE 9—MODEL 340MAV ORIFICE SIZE AND MANIFOLD PRESSURE FOR CORRECT INPUTFOR USE WITH 140 SIZE FURNACES ONLY(TABULATED DATA BASED ON 23,000 BTUH PER

→ TABLE 9—MODEL 340MAV ORIFICE SIZE AND MANIFOLD PRESSURE FOR CORRECT INPUT ContinuedFOR USE WITH 140 SIZE FURNACES ONLY(TABULATED DATA BASED ON 23,00

6. Before removing a new control from its container, dis-charge your body’s electrostatic charge to ground to protectthe control from damage. If the c

f. Look through sight glass in burner enclosure and checkburner flame. Burner flame should be clear blue, almosttransparent. (See Fig. 45.)3. Verify n

3. Adjust temperature rise by adjusting blower speed. Increaseblower speed to reduce temperature rise. Decrease blowerspeed to increase temperature ri

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

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A94328SERVICE TRAININGPackaged Service Training programs are an excellent way to increase your knowledge of the equipment discussed in this manual, in

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

H. Condensate Trap Freeze ProtectionRefer to Condensate Drain Protection section for recommenda-tions and procedures.III. DOWNFLOW APPLICATIONSA downf

d. Use inducer housing drain tube (violet label and factory-supplied in loose parts bag) to connect LOWER inducerhousing drain connection to the conde

CAUTION: Local codes may require a drain pan underentire furnace and condensate trap when a condensingfurnace is used in an attic application or over