Bryant 912SA Instruction Manual

1912SASINGLE STAGE 4--WAY MULTIPOISE GAS FURNACESERIES AInstallation, Start--up, Operating andService and Maintenance InstructionsNOTE: Read the entir

10The opening shall commence within 12 in. (300 mm) of theceiling. Appliances in the space shall have clearances of at least 1in. (25 mm) from the sid

11Table 3 – Minimum Free Area Required for Each Combustion Air Opening or Duct to OutdoorsFURNACEINPUT(BTUH)TWO HORIZONTAL DUCTS(1 SQ. IN./2,000 BTUH)

121 SQ IN.PER4000BTUH*DUCTSTOOUTDOORS1 SQ IN.PER 4000BTUH*CIRCULATINGAIR DUCTSVENTTHROUGHROOFDBACE1 SQ IN.PER 4000BTUH*DUCTTOOUTDOORSCIRCULATING AIR D

13CONDENSATE TRAPCondensate Trap -- Upflow OrientationWhen the furnace is installed in the upflow position, it is notnecessary to relocate the condens

14Remove relief tube from reliefport on condensate trap.Remove the screwthat secures the trap to the collector box andremove trap.Loosen clamp on inle

15Remove plug fromcollector box.DO NOT DISCARD.If alternate vent positionis required, loosen clampon inlet of vent elbow.Remove the screw that secures

16If alternate vent positionis required, loosen clampon vent elbow inlet.Remove relief tubefrom port on collectorbox.Remove the screw that secures the

17CONDENSATE DRAIN CONNECTIONFROZEN AND BURST WATER PIPE HAZARDFailure to protect against the risk of freezing may result inproperty damage.Special pr

1813. Secure the rubber elbow to the drain trap and the Z-pipewith spring clamps.14. Secure the grommet to the Z-pipe with the spring clamp.The remain

19INSTALL CLAMPS ON DRAIN TUBEATTACH DRAIN TUBE TO CONDENSATE DRAIN TRAPPULL DRAIN STUB THROUGH CASINGOPEN SPRING CLAMPINSERT FACTORYïSUPPLIED 1/2ïIN.

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

20INSTALLATIONNOTE: This furnace is certified to leak 2% or less of nominal airconditioning CFM delivered when pressurized to 1--inch watercolumn with

21The return--air duct must be connected to return--air opening(bottom inlet). DO NOT cut into casing sides (left or right).Bypass humidifier connecti

22For horizontal applications, the filter rack (or field suppliedaccessory air cleaner) can be connected to the bottom opening onthe furnace. For side

2314-3/16 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

24PLENUMOPENINGCABDFLOOROPENINGDOWNFLOWSUBBASESHEET METALPLENUMFLOOROPENINGFURNACE(OR COIL CASINGWHEN USED)COMBUSTIBLEFLOORINGAPPROVEDCOIL ASSEMBLYOR

25UPFLOW DOWNFLOW HORIZONTALYESNONOYESYESYESNO120°MINYES120°MINYES120°MIN90°90°PERFORATEDDISCHARGE DUCTFLANGEA10493Fig. 22 -- Duct Flanges1 3 / 4 ″1

26ANY COMBINATION OF 1, 2, OR 3 PERMITTED.A11036Fig. 26 -- Upflow Return Air Configurations and RestrictionsA11037Fig. 27 -- Downflow Return Air Confi

272-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

28AIR DUCTSGeneral RequirementsThe duct system should be designed and sized according toaccepted national standards such as those published by: AirCon

29Table 7 – Air Delivery -- CFM (With Filter)UNIT SIZERETURN-AIR SPEEDTAPS2EXTERNAL STATIC PRESSURE (IN.W.C.)RETURNAIRCONNECTION0.1 0.2 0.3 0.4 0.5 0.

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

30GAS PIPINGFIRE OR EXPLOSION HAZARDFailure to follow this warning could result in personalinjury, death, and/or property damage.Never purge a gas lin

31Table 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

32J--Box InstallationFIRE OR ELECTRICAL SHOCK HAZARDFailure to follow this warning could result in personalinjury, death, or property damage.If field-

33alternate power supply must generate the same voltage, phase, andfrequency (Hz) as shown in Table 9 or the furnace rating plate.Power from an altern

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.

35BLWNUETRALSTATUS CODE LEDSEC-2 SEC-1EAC-2 L2FUSE 3-AMP0.5 AMP@24VACHUMTEST/TWIN G Com W Y R24V120 18090 150BLOWER OF

36VENTINGFurnace is set in place in the required orientation.Special Venting Requirements for Installations inCanadaInstallation in Canada must confor

37A furnace shall not be connected to a chimney flue serving aseparate appliance designed to burn solid fuel.Other gas appliances with their own venti

385. Termination or termination kit should be positioned wherevent vapors are not objectionable.Direct Vent / 2-Pipe SystemDirect vent (2--pipe) vent

396. Install the insulation per the insulation manufacturer’s in-stallation instructions.NOTE: Pipe length (ft. / M) specified for maximum pipe length

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

401. Insert a length of vent pipe through the casing into theoutlet of the vent elbow.2. Slide the plastic vent pipe adapter over the length of theven

41Table 11 – Approved Combustion-Air and Vent Pipe, Fitting and Cement Materials (U.S.A. Installations)ASTM SPECIFICATION(MARKED ON MATERIAL)MATERIAL

42Table 12 – Maximum Allowable Exposed Vent Lengths Insulation Table -- Ft. / MMaximum Length of Uninsulated and Insulated Vent Pipe-Ft (M)Single Stag

43Table 13 – Maximum Equivalent Vent Length -- Ft. (M)0 to 4500 Ft. (0 to 1370 M) AltitudeNOTE: Maximum Equivalent Vent Length (MEVL) includes standar

44Venting System Length CalculationsThe maximum length for each vent pipe (inlet or exhaust) equals the Maximum Equivalent Vent Length (MEVL) from Tab

45Table 15 – Maximum Equivalent Vent Length -- Ft. (M)4501 to 10,000 Ft. (0 to 1370 M) AltitudeNOTE: Maximum Equivalent Vent Length (MEVL) includes st

46Attach gaskets to vent pipe andcombustion air adapters.Vent Coupling and AdapterA11314Fig. 38 -- Vent Coupling and Adapter with GasketsPSC INDUCER A

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

5NOT move or shuffle your feet, do not touch ungroundedobjects, etc.).4. If you touch ungrounded objects (and recharge your bodywith static electricit

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

58b. Obtain average yearly gas specific gravity from local gassupplier.c. Find installation altitude in Table 19.d. Find closest natural gas heat valu

59(Read following caution before changing taps).UNIT DAMAGE HAZARDTo avoid operating outside the rise range and avoidcomponent damage:Refer to the Air

6A11613Fig. 1 -- Dimensional Drawing912SA

60ON/OFF SwitchRegulator Seal CapRegulator AdjustmentRegulator Seal Cap under Cap1/2” NPT Outlet1/8” NPT ManifoldPressure Tap1/8” NPT InletPressure Ta

61338309-201 Rev. EA11602Fig. 55 -- Service Label Information912SA

62Table 18 – Gas Rate (CU ft./hr)SECONDSFOR 1 REVOLUTIONSIZE OF TEST DIALSECONDSFOR 1 REVOLUTIONSIZE OF TEST DIAL1CuFt. 2CuFt. 5CuFt. 1CuFt. 2CuFt. 5C

63Table 19 – Orifice Size and Manifold Pressure (in. w.c.) for Gas Input RateSAGLARUTANFOYTIVARGCIFICEPSSAG.GVAHEATVALUE0.580.600.620.64AT ALTITUDE Or

64Table 20 -- Orifice Size and Manifold Pressure (in. w.c.) for Gas Input Rate (Cont.)SAGLARUTANFOYTIVARGCIFICEPSSAG.GVAHEATVALUE0.580.600.620.64AT AL

65SERVICE AND MAINTENANCEPROCEDURESFIRE, INJURY OR DEATH HAZARDFailure to follow this warning could result in personalinjury, death and/or property da

66Component Self-TestNOTE: The furnace control component test allows allcomponents to run for a short time; except the gas valve andhumidifier termina

672. Check blower motor and wheel for cleanliness each heatingand cooling season. Clean as necessary.3. Check electrical connections for tightness and

6813. Reinstall blower assembly in furnace.14. Reinstall 2 screws securing blower assembly to blowerdeck.15. Reconnect blower leads to furnace control

69FIRE OR EXPLOSION HAZARDFailure to follow this warning could result in personalinjury, death, and/or property damage.Never purge a gas line into a c

7THE BLOWER IS LOCATEDTO THE RIGHT OF THEBURNER SECTION, ANDAIR CONDITIONED AIR ISDISCHARGED TO THE LEFT.THE BLOWER ISLOCATED BELOW THEBURNER SECTION,

709. Turn gas on at electric switch on gas valve and at externalshut-off or meter10. Turn power on at external disconnect, fuse or circuit break-er.11

71reach 32_F(0_C) or lower unless winterized. Follow theseprocedures to winterize your furnace:UNIT COMPONENT DAMAGE HAZARDFailure to follow this caut

72SET SCREWMOTOR WHEEL HUBMOTOR SHAFT FLATSCREWMOTOR ARMGROMMETSCREW LOCATIONBLO HSG ASSYBRACKETBRACKETENGAGEMENTSEE DETAIL ACAPACITOROR POWER CHOKE(W

73FLAME SENSOR(BELOW BURNER)FLAME ROLLOUTSWITCHBRACKET, IGNITERIGNITERBURNER SUPT. ASSYBURNER ASSYA11403Fig. 62 -- Burner Assembly912SA

74SEQUENCE OF OPERATIONNOTE: Furnace control must be grounded for proper operation orcontrol will lock out. Control is grounded through green/yellowwi

75Is 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 tr

76 11 NO PREVIOUS CODE – Stored codes are erased after 72 hours. Run system through a heating or cooling cycle to check system. 12 BLOWER ON AFTER

77338309-201 Rev. EA11603Fig. 64 -- Wiring Diagram912SA

78PARTS REPLACEMENT INFORMATION GUIDECasing GroupBlower doorBottom plateControl doorDoor knob assemblyTop filler plateElectrical Group3--Amp fuseCircu

8LOCATIONPERSONAL INJURY AND/OR PROPERTYDAMAGE HAZARDImproper use or installation of this furnace may result inpremature furnace component failure. Th

9FIRE HAZARDFailure to follow this warning could result in personalinjury, death and/or property damage.Do not install the furnace on its back or hang