Bryant start--up operating and service and Bedienerhandbuch

1987MAMODULATING 4--WAY MULTIPOISEGAS FURNACESERIES A.Installation, Start--up, Operating andService and Maintenance InstructionsNOTE: Read the entire

10Table 3 – Minimum Free Area Required for Each Combustion Air Opening or Duct to OutdoorsFURNACEINPUT(BTUH)TWO HORIZONTAL DUCTS(1 SQ. IN./2,000 BTUH)

11CONDENSATE TRAPCondensate Trap-- Upflow OrientationWhen the furnace is installed in the upflow position, it is notnecessary to relocate the condensa

12For Horizontal Left only:S Connect the relief tube to the relief port of the condensate trap.S Connect the pressure switch tube to the port on the c

13Remove relief tube from relief port on condensate trap.Remove pressure switch tube frompressure switch port.Remove trap fromcollector box.Loosen cla

14Remove plug fromcollector box.DO NOT DISCARD.If alternate vent positionis required, loosen clampon inlet of vent elbow.Remove trap from collector bo

15If alternate vent positionis required, loosen clampon vent elbow inlet.Remove trap fromcollector box.Remove pressure switch tube from port on collec

16CONDENSATE DRAIN CONNECTIONUpflow/Downflow OrientationIn the Upflow or Downflow orientation, the condensate trap isinside the furnace casing. The co

17CUT HAZARDFailure to follow this caution may result in personal injury.Sheet metal parts may have sharp edges or burrs. Use careand wear appropriate

18INSTALLATIONUpflow InstallationNOTE: The furnace must be pitched forward as shown in Fig. 22for proper condensate drainage.Supply Air ConnectionsFor

19bottom return air is used in downflow applications. To removebottom closure panel, perform the following:1. Tilt or raise furnace and remove 4 screw

2Required Notice for Massachusetts InstallationsIMPORTANTThe Commonwealth of Massachusetts requires compliance with regulation 248 CMR as follows:5.08

20Table 5 – Filter Size Information -- In. (mm)FURNACE CASING WIDTHFILTER SIZEFILTER TYPESIDE RETURN BOT TOM RETURN17---1/2 (445)16 x 25 x 3/4(406 x 6

2114-3/16 and 17-1/2-in.Furnace16-in. Media Cabinet21-in. Furnace4-Ton or less, ACcapacity airflow20-in. Media Cabinet4-in.Block OffPlate1/2-in.Screws

22PLENUMOPENINGCABDFLOOROPENINGDOWNFLOWSUBBASESHEET METALPLENUMFLOOROPENINGFURNACE(OR COIL CASINGWHEN USED)COMBUSTIBLEFLOORINGAPPROVEDCOIL ASSEMBLYOR

23UPFLOW DOWNFLOW HORIZONTALYESNONOYESYESYESNO120°MINYES120°MINYES120°MIN90°90°PERFORATEDDISCHARGE DUCTFLANGEA10493Fig. 19 -- Duct Flanges1 3 / 4 ″1

24ANY COMBINATION OF 1, 2, OR 3 PERMITTED.A11036Fig. 23 -- Upflow Return Air Configurations and RestrictionsA11037Fig. 24 -- Downflow Return Air Confi

252-IN.(51 mm)ROLLOUT PROTECTION REQUIREDInstall 12” x 22” (305 x 559 mm) sheetmetal in front of burner compartmentarea.30 IN. (762 mm)MIN. WORK AREAC

26AIR DUCTSGeneral RequirementsThe duct system should be designed and sized according toaccepted national standards such as those published by: AirCon

27Table 7 – Air Delivery -- CFM (With Filter)(SW1-5 and SW4-3 set to OFF, except as indicated. See Notes 1 and 2.)INPUTBTUHCooling Switch Settings Ext

28Table 7 -- Air Delivery -- CFM (With Filter) (Continued)(SW1-5 and SW4-3 set to OFF, except as indicated. See Notes 1 and 2.)INPUTBTUHCooling Switch

29GAS PIPINGFIRE OR EXPLOSION HAZARDFailure to follow this warning could result in personalinjury, death, and/or property damage.Never purge a gas lin

3SAFETY CONSIDERATIONSFIRE, EXPLOSION, ELECTRICAL SHOCK, ANDCARBON MONOXIDE POISONING HAZARDFailure to follow this warning could result in dangerousop

30Table 8 – Maximum Capacity of PipeNOMINALIRON PIPESIZEIN. (MM)LENGTH OF PIPE --- FT (M)10(3.0)20(6.0)30(9.1)40(12.1)50(15.2)1/2 (13) 175 120 97 82 7

31J--Box InstallationFIRE OR ELECTRICAL SHOCK HAZARDFailure to follow this warning could result in personalinjury, death, or property damage.If field-

322. Humidifier (HUM)The HUM terminal is a 24 VAC output, energized when the bloweris operating during a call for heat.Connect an accessory 24 VAC, 0.

33J BOX LOCATIONSJ−B OXMOUNTINGSCREWSJ−B OXMOUNTINGBRACKETGROUNDSCREWJ−BO X C OV ERA11156Fig. 30 -- Installing J--Box (When Used)(Appearance May Vary)

3424 V Coil To Humidifier Leads To Com/24V Screw Terminal on Thermostat Strip To HUM Terminal On Furnace Control Board To Humidifier Leads A11157Fig.

35 24-V THERMOSTAT TERMINALS PL2 – HOT SURFACE IGNITER & INDUCER MOTOR CONNECTOR 115-VAC (L2) NEUTRAL CONNECTIONS 115-VAC (L1) LINE VOLTAGE CONN

36Modulating and 2-Stage Furnace with Single-Speed Air ConditionerModulating and 2-Stage Furnace with Two-Speed Air ConditionerModulating and 2-Stage

37NOTES FOR THERMOSTAT WIRING DIAGRAMS1. Heat pump MUST have a high pressure switch for dual fuel applications.2. Refer to outdoor equipment Installat

38VENTINGFurnace is set in place in the required orientation.Special Venting Requirements for Installations inCanadaInstallation in Canada must confor

39A furnace shall not be connected to a chimney flue serving aseparate appliance designed to burn solid fuel.Other gas appliances with their own venti

4INTRODUCTIONThis 4 --way multipoise Category IV condensing furnace is CSAdesign --certified as a direct (2-pipe) or non-direct vent (1-pipe)furnace.

40(1.2 M) of unobstructed distance to the property line of theadjacent lot, no type of vent termination is permitted for applianceswith inputs greater

412. Rotate the vent elbow to the required position. There arerounded notches in the vent elbow to align it with theinducer housing for each orientati

42two-pipe or single pipe vent systems, a flashing for each pipe of therequired diameter will be necessary.It is recommended that the flashing be inst

43Table 12 – Maximum Allowable Exposed Vent Lengths Insulation Table -- Ft. / MMaximum Length of Uninsulated and Insulated Vent Pipe-Ft (M)ModulatingF

44NOTE: Maximum Equivalent Vent Length (MEVL) does NOT include elbows or terminations. Use Table 14 - Deductions fromMaximum Equivalent Vent Length to

45NOTE: Maximum Equivalent Vent Length (MEVL) does NOT include elbows or terminations. Use Table 14 - Deductions fromMaximum Equivalent Vent Length to

46Attach gaskets to vent pipe andcombustion air adapters.Vent Coupling and AdapterA11314Fig. 36 -- Vent Coupling and Adapter with GasketsMODULATING IN

4712346755Rotate vent elbow torequired position.Any other unusedknockout may be usedfor combustion airconnection.&A1130912345675Rotate vent elbow

48Attach vent pipe adapter with gasket to furnace casing.Align notches in rubber coupling over standoffs on adapter. Slide clamps over the coupling.S

49HORIZONTAL LEFT - RIGHT VENT CONFIGURATION**Requires Accessory Internal Vent Kit See Product Data for Current Kit Number HORIZONTAL LEFT -VERTICAL V

57. An ESD service kit (av ailable from commercial sources)mayalsobeusedtopreventESDdamage.ACCESSORIESSee Product Data Sheet for a list of accessories

50HORIZONTAL RIGHT - VERTICAL VENT CONFIGURATIONHORIZONTAL RIGHT - LEFT VENT CONFIGURATION**Requires Internal Vent Kit See Product Data for Current Ki

51VENT PIPE FLUSH SHOWING COUPLINGVENT PIPE FLUSH WITH ADAPTERVENT PIPE ADAPTER WITH GASKETINSTALLED ON FURNACE VENTPIPE IS CUT FLUSH WITH TOP OFADAPT

52VVItemClearance Description Canadian Installation (1) U.S. Installation (2)AClearance above grade, veranda, porch, deck, bal-cony or anticipated sno

53Item Clearance Description Canadian Installation (1) U.S. Installation (2)AClearance above grade, veranda, porch, deck, bal-cony or anticipated snow

54At least 36 in. 18 in. maximu m V e r tical separation between comb ustion air and v ent 8 3/4 in. (222mm)f or 3 in. (76mm)ki t 6 3/4 in. (172mm)f

55NOTE: This illustration is forreference only. Your unit maydiffer in appearance or may notinclude all components shown.MAINTAIN 12 IN.CLEARANCEABOV

563” (76 mm)12” (305 mm) Pipe hangarVentilated Combustion Airintake termination in crawlspaceVentilated CombustionAir intake pipeCRAWL SPACEATTIChighe

57START--UP, ADJUSTMENT, AND SAFETYCHECKGeneral1. Furnace must have a 115-v power supply properly connec-ted and grounded.NOTE: Proper polarity must b

58FIRE OR EXPLOSION HAZARDFailure to follow this warning could result in personalinjury, death, and/or property damage.Never purge a gas line into a c

59To adjust manifold pressure to obtain input rate for MaximumHeat:1. Make sure the gas supply is turned off to the furnace and atthe electric switch

6FIRE, INJURY OR DEATH HAZARDFailure to follow this warning could result in personalinjury, death and/or property damage.When the furnace is installed

60To lock the furnace in Intermediate Heat:1. Turn SW1--2 OFF and SW4--2 ON at the furnace control.2. Connect a jumper across R and W/W1 at the thermo

61stricted return --air supply or motor failure. If limit controldoes not function during this test, cause must be determinedand corrected.a. Run furn

62338307-2 Rev. CA11428Fig. 53 -- Service Label Information987MA

63ESU FO NOITPIRCSEDNOITISOP LAMRONEMAN HCTIWSHCTIWS PUTESSW1-1 Status Code Recovery OFFTurn ON to retrieve up to 7 stored status codes for troublesho

64Table 16 – Altitude Derate Multiplier for U.S.A.*ALTITUDEPERCENTOFDERATEDERATEMULTIPLIERFACTOR*FT. M0–2000 0 --- 6 1 0 0 1.002001–3000 610---914 4 -

65Table 19 – Orifice Size and Manifold Pressure (In. W.C.) for Gas Input RateSAGLARUTANFOYTIVARGCIFICEPSSAG.GVAHEATVALUE0.580.600.620.64AT ALTITUDE Or

66Table 19 -- Orifice Size and Manifold Pressure (In. W.C.) for Gas Input Rate (Continued)SAGLARUTANFOYTIVARGCIFICEPSSAG.GVAHEATVALUE0.580.600.620.64A

67SERVICE AND MAINTENANCEPROCEDURESFIRE, INJURY OR DEATH HAZARDFailure to follow this warning could result in personalinjury, death and/or property da

682. Turn Setup Switch, SW1--1 “ON.”3. Manually close blower door switch.4. Control will flash up to 7 Status Codes.5. The last Status Code, or 8th Co

694. Inspect burner compartment before each heating season forrust, corrosion, soot or excessive dust. If necessary, havefurnace and burner serviced b

7987MAA11449Fig. 1 -- Dimensional DrawingNOTE: Doors may vary by model.a. For 800 CFM--- 16--- in. (406 mm) round or 14 1/2 x 12--- in. (368 x 305 mm)

7015. Reconnect blower leads to furnace control. Refer to furnacewiring diagram, and connect thermostat leads if previouslydisconnected.NOTE: Be sure

71FIRE OR EXPLOSION HAZARDFailure to follow this warning could result in personalinjury, death, and/or property damage.Never purge a gas line into a c

7210. Turn power on at external disconnect, fuse or circuit break-er.11. Run the furnace through two complete heating cycles tocheck for proper operat

73UNIT COMPONENT DAMAGE HAZARDFailure to follow this caution may result in damage to thefurnace and other property damage.Do not use ethylene glycol (

74A11347Fig. 60 -- Blower Assembly987MA

75FLAME SENSOR(BELOW BURNER)FLAME ROLLOUTSWITCHBRACKET, IGNITERIGNITERBURNER SUPT. ASSYBURNER ASSYA11403Fig. 61 -- Burner Assembly987MA

76Is AMBER LED status light on?Is there 24V at SEC-1 and SEC-2?Is there 115V at L1 and L2?Replace furnace control.Is door switch closed?Replace transf

7711 NO PREVIOUS CODE – Status codes areerased after 72 hours or can be manuallyerased by putting setup switch SW1-1 inthe ON position and jumpering R

7825 INVALID MODEL SELECTION ORSETUP ERROR – If status code 25 onlyflashes 4 times on power-up the control ismissing its model plug PL4 and isdefaulti

79SEQUENCE OF OPERATIONUNIT OPERATION HAZARDFailure to follow this caution may result in intermittent unitoperation.Furnace control must be grounded f

8THE BLOWER IS LOCATEDTO THE RIGHT OF THEBURNER SECTION, ANDAIR CONDITIONED AIR ISDISCHARGED TO THE LEFT.THE BLOWER ISLOCATED BELOW THEBURNER SECTION,

80will close the gas valve GV (pin 5), and the furnace controlCPU will repeat the ignition sequence for up to three moreTrials-For-Ignition before goi

81The furnace will start up in either intermediate-, or maximum-heat.The furnace will operate in minimum-heat after starting andoperating for 1 minute

823. Two Stage Thermostat and Two-Speed CoolingSee Fig. 34 and 35 for thermostat connections.NOTE: The air conditioning relay disable jumper ACRDJ mus

83Heat PumpSee Fig. 34 and 35 for thermostat connections. When installed witha heat pump, the furnace control automatically changes the timingsequence

84338307-2 Rev. CA11429Fig. 63 -- Wiring Diagram987MA

85PARTS REPLACEMENT INFORMATION GUIDECasing GroupBlower doorBottom plateControl doorDoor knob assemblyTop filler plateElectrical Group3--Amp fuseCircu

86Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incur ring obligations.E

9AIR FOR COMBUSTION ANDVENTILATIONIntroductionDirect Vent (2--pipe) ApplicationsWhen the furnace is installed as a direct vent (2-pipe) furnace, nospe