Bryant Series B 345MAV Manuel d'utilisateur

NOTE: Read the entire instruction manual before starting theinstallation.Index PageDIMENSIONAL DRAWING...

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

3. Route extended collector box pressure tube behind inducermotor bracket then between inducer motor and pressureswitch.4. Connect collector box press

CAUTION: Do not use this furnace during constructionwhen adhesives, sealers, and/or new carpets are beinginstalled and curing. If the furnace is requi

III. HAZARDOUS LOCATIONSAIR FOR COMBUSTION AND VENTILATIONI. GENERALProvisions for adequate combustion and ventilation air must beprovided in accordan

2. If combustion air is taken from outdoors through horizontalducts, the openings and ducts MUST have at least 1 sq in.of free area per 2000 Btuh of t

3. Install another nut on other side of furnace base. (Install flatwasher if desired.)4. Adjust outside nut to provide desired height, and tighteninsi

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

D. Return Air Connections1. Upflow FurnacesThe return-air duct must be connected to bottom, sides (left orright), or a combination of bottom and side(

To remove bottom closure panel, perform following:1. Tilt or raise furnace and remove 2 screws holding frontfiller panel. (See Fig. 22.)2. Rotate fron

CAUTION: If a flexible connector is required or al-lowed by authority having jurisdiction, black iron pipeshall be installed at gas valve and extend a

→ 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 1

CAUTION: Furnace control must be grounded forproper operation or control will lock out. Control isgrounded through green wire routed to gas valve andb

Fig. 26—Wiring Diagram A99106PCBBLOWER OFF DELAYSELECTION CHART90 SEC135 SEC180 SEC225 SECGVRHI/LORELAYSEC-1SEC-2WHTPL1321654987LEDTEST/TWINBLOWEROFFD

II. 24-V WIRINGMake field 24-v thermostat connections at 24-v terminal block oncontrol center. For proper cooling operation, Y wire from thermo-stat M

7. If improper venting is observed during any of above tests,the venting system must be corrected.Vent system or vent connectors may need to be resize

NOTE: Do not attach combustion-air intake pipe permanently tocombustion-air intake housing since it may be necessary to removepipe for service of igni

TABLE 4—MAXIMUM ALLOWABLE VENT PIPE LENGTH (FT)ALTITUDE (FT) UNIT SIZEVENT PIPEDIAMETER (IN.)NUMBER OF 90° ELBOWS1 234560 to 20000240400360401 5 NA NA

TABLE 4—MAXIMUM ALLOWABLE VENT PIPE LENGTH (FT) ContinuedALTITUDE (FT) UNIT SIZEVENT PIPEDIAMETER (IN.)NUMBER OF 90° ELBOWS1234565001 to 6000†02404003

Fig. 32—Short Vent (5 to 8 Ft) SystemA96189HORIZONTAL TO ROOF HORIZONTAL TO SIDEWALLVERTICAL TO SIDEWALLVERTICAL TO ROOFVENT PIPEVENT PIPEVENT PIPEVEN

WARNING: Inducer housing outlet cap must be in-stalled and fully seated against inducer housing. Clampmust be tightened to prevent any condensate leak

15. Slope vent pipe toward furnace a minimum of 1/4 in. perlinear ft with no sags between hangers.16. Use appropriate methods to seal openings where v

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

Fig. 35—Sidewall Termination with Straight PipeA96210MAINTAIN 12-IN.CLEARANCEABOVE HIGHESTANTICIPATED SNOWLEVEL OR GRADE,WHICHEVER ISGREAT

4. Wrap field drain pipe with remaining heat tape, approxi-mately 1 wrap per ft.5. When using field-supplied heat tape, follow heat tapemanufacturer’s

V. COMPONENT TESTA. Component Test SequenceNOTE: All components are functionally operated except the gasvalve.When component test is initiated, the fo

5. Remove funnel and tube from inducer housing and replacedrain connection cap and clamp.III. PURGE GAS LINESIf not previously done, purge lines after

TABLE 7—MODEL 345MAV ORIFICE SIZE AND MANIFOLD PRESSURE FOR CORRECT INPUT(TABULATED DATA BASED ON 20,000 BTUH PER BURNER, DERATED 2% FOR EACH 1000 FT

TABLE 7—MODEL 345MAV ORIFICE SIZE AND MANIFOLD PRESSURE FOR CORRECT INPUT Continued(TABULATED DATA BASED ON 20,000 BTUH PER BURNER, DERATED 2% FOR EAC

TABLE 7—MODEL 345MAV ORIFICE SIZE AND MANIFOLD PRESSURE FOR CORRECT INPUT Continued(TABULATED DATA BASED ON 20,000 BTUH PER BURNER, DERATED 2% FOR EAC

b. Remove cap that conceals adjustment screw for gasvalve regulator. (See Fig. 40.)c. Turn adjusting screw, counterclockwise (out) to decreasemanifold

c. Measure time (in sec) for gas meter test dial to complete1 revolution.d. Refer to Table 9 for cu ft of gas per hr.e. Multiply gas rate (cu ft/hr) X

CHECK SAFETY CONTROLSI. CHECK PRIMARY LIMIT CONTROLThis control shuts off combustion control system and energizesair-circulating blower motor if furna

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

CHECKLIST—INSTALLATIONLOAD CALCULATION________ Heating Load (Btuh)________ Cooling Load (Btuh)________ Furnace Model SelectionVENT PIPINGTermination L

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

C. Condensate Trap Field Drain AttachmentRefer to Condensate Drain section for recommendations andprocedures.D. Pressure Switch TubingThe LOWER collec