Bryant 4-WAY Manuel d'utilisateur

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

a. Install drain tube coupling (factory-supplied in looseparts bag) into collector box drain tube (blue label)which was previously connected to conden

CAUTION: The condensate trap MUST be installedbelow furnace. See Fig. 6 for dimensions. The drainconnection to condensate trap must also be properlysl

d. Clamp tube to prevent any condensate leakage.2. Inducer Housing Drain Tubea. Remove factory-installed cap and clamp from LOWERinducer housing drain

LOCATIONI. GENERALThis furnace must• be installed so the electrical components are protected fromwater.• not be installed directly on any combustible

CAUTION: The furnace can operate in the high-heatmode when certain fault conditions occur. The followingprecautions should be taken:1. Size gas piping

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

be suspended from each corner by hanger bolts and angle ironsupports. (See Fig. 23.) Cut hanger bolts (4 each 3/8-in. all-threadrod) to desired length

Secure ductwork with proper fasteners for type of ductwork used.Seal supply- and return-duct connections to furnace with codeapproved tape or duct sea

To remove bottom closure panel, perform following:1. Tilt or raise furnace and remove 2 screws holding frontfiller panel. (See Fig. 26.)2. Rotate fron

WARNING: Use proper length of pipe to avoid stress ongas control manifold. Failure to follow this warning couldresult in a gas leak resulting in fire,

Check Primary Limit Control...45Check Pressure Switch...

II. 24-V WIRINGMake field 24-v thermostat connections at 24-v terminal block onfurnace control. Y wire from thermostat MUST be connected toY/Y2 termin

2. Humidifier (HUM)Connect an accessory 24 VAC, 0.5 amp maximum humidi-fier (if used) to the 1/4-in. male quick-connect HUMterminal and COM-24V screw

→Fig. 31—Unit Wiring DiagramA02291LEGENDJUNCTIONTERMINALCONTROL TERMINALFACTORY POWER WIRING (115VAC)FACTORY CONTROL WIRING (24VAC)FIELD CONTROL WIRIN

→ Fig. 32—Control CenterA02278FLASH UPGRADE CONNECTOR (FACTORY ONLY) ACRDJ – AIR CONDITIONING RELAY DISABLE JUMPERHUMIDIFIER TERMINAL (24-VAC 0.5 AMP

Furnace combustion-air and vent pipe connections must be at-tached as shown in Fig. 34. Combustion-air intake plug fitting andinducer housing alternat

NOTE: The minimum combustion-air and vent pipe length (each)for these furnaces is 5 ft. Short pipe lengths (5-8 ft) may dischargewater droplets. These

TABLE 7—MAXIMUM ALLOWABLE PIPE LENGTH (FT)ALTITUDEUNITSIZETERMINATIONTYPEPIPE DIAMETER(IN.)*NUMBER OF 90° ELBOWS1234560 to 20000420402 Pipe or 2-In.Co

TABLE 7—MAXIMUM ALLOWABLE PIPE LENGTH (FT) ContinuedALTITUDEUNITSIZETERMINATIONTYPEPIPE DIAMETER(IN.)*NUMBER OF 90° ELBOWS1234566001 to 7000‡0420402 P

a. Determine location of combustion-air intake pipe con-nection to combustion-air intake housing as shown inFig. 34 for application.b. Reposition comb

12. Support combustion-air and vent piping a minimum ofevery 5 ft (3 ft for SDR-21 or -26 PVC) using perforatedmetal hanging strap.13. Slope combustio

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-

Fig. 40—Sidewall Termination of 12 in. or MoreA87225MAINTAIN 12 IN.CLEARANCEABOVE HIGHESTANTICIPATED SNOWLEVEL OR GRADE,WHICHEVER ISGREATER.90°V

furnaces are vented near each other, 2 vent terminations may beinstalled as shown in Fig. 42, 43, 44, 45, or 46, but next venttermination must be at l

Fig. 45—Sidewall Termination of 12 in. or Less(Dimension "A" is Touching or 2-In.Maximum Separation)A96129ACOMBUSTION AIRCOMBUSTION AIRVEN

thermostat is still calling for gas heating. The amber LED light willflash code 12 during the 90-second period, after which the LEDwill be ON continuo

low-heat pressure switch LPS closes. When the high-heat pressureswitch closes, inducer motor RPM is noted by the furnace controlCPU before the 25-sec

When the thermostat is satisfied, the R-to-G-and-Y circuitsare opened. The outdoor unit will stop, and furnace blowermotor BLWM will continue operatin

c. Cooling off-delay-When the ″call for cooling″ is satis-fied and there is a demand for dehumidification, thecooling blower-off delay is decreased fr

A00275→ Fig. 50—Two-Stage Furnace with Single-SpeedAir ConditionerFig. 51—Two-Stage Furnace with Two-SpeedAir ConditionerA00276A00277→ Fig. 52—Two-Sta

To set the desired cooling airflow:1. Remove main furnace door and blower access door.2. Locate A/C setup switches on frunace control. (See Fig.32.)3.

C. Setup Switches (SW1)The furnace control has 8 setup switches that may be set to meetthe application requirements. Position these setup switches for

These furnaces are shipped with the following materials to assist inproper furnace installation. These materials are shipped in the mainblower compart

e. Find closest natural gas heat value and specific gravity inTable 11.f. Follow heat value and specific gravity lines to point ofintersection to find

g. Jumper R and W/W1 and W2 thermostat connections onfurnace control. (See Fig. 32.) This keeps furnace lockedin high-heat operation.h. Turn high-heat

EXAMPLE: (High-heat operation at 0—2000 ft altitude)Furnace input from rating plate is 100,000 BtuhBtu heating input = Btu/cu ft X cu ft/hrHeating val

AVG. GAS SPECIFIC GRAVITY OF NATURAL GASHEAT VALUE 0.58 0.60 0.62 0.64AT ALTITUDE Orifice Mnfld Press Orifice Mnfld Press Orifice Mnfld Press Orifice

AVG. GAS SPECIFIC GRAVITY OF NATURAL GASHEAT VALUE 0.58 0.60 0.62 0.64AT ALTITUDE Orifice Mnfld Press Orifice Mnfld Press Orifice Mnfld Press Orifice

Fig. 65 illustrates an easy method of obtaining thermostat ampdraw measurements. The amp reading should be taken after blowermotor has started and fur

switch is closed. If either a status code 31 or 32 is flashedwhen inducer motor is disconnected, the furnace will shutitself down immediately. Determi

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

© 2002 Bryant Heating & Cooling Systems 7310 W. Morris St. Indianapolis, IN 46231—48—Printed in U.S.A. 355m4010 Catalog No. 5335-516

Combustion-air pipe perforated disk assembly 1Condensate trap hole filler plug 3Vent and combustion-air intake hole filler plug 2CODES AND STANDARDSFo

1. Collector Box Drain, Inducer Housing Drain, Relief Port,and Pressure Switch TubesThese tubes should be factory attached to condensate trapand press

WARNING: Casing hole filler cap must be installed inblower shelf hole when condensate trap is relocated.Failure to follow this warning could result in

G. Upper Collector Box and Inducer Housing (Unused)Drain ConnectionsUPPER COLLECTOR BOX DRAIN CONNECTIONAttached to the UPPER collector box drain conn

(2.) Condensate Trap Located on Right Side of Casing(a.) Install drain tube coupling (factory-supplied inloose parts bag) into collector box drain tub