Bryant 333BAV Furnace User Manual
Contents
1. NO pent ONES ANOLOWSHOLOTTaS MOTH O une us 29 JIM 1eyipiuny ay Jou AJLA seb eu JeujreN Yoke spuooes G Z Sui NT HOIA Go NO NN unono a0 10 paads 002 uip Jojow Jamojg pue paads yeay sed YBIH 1040W onen alias AED Jemojq paads ue snonunuo ojoui Jamojq ISH peedg uip 100w xe Con y 4 301148 qu ON 1SdQAVIHH3ATVASVONIVA HAOW Jeonput peeds Mo7 Jojoui Je9npul Y NO Uni IM 04009 eu spuooes Y O N LSdS 13838 OLNV 38N vui L83AO HOLIMS Linn s1 OM JNOGE 104 eutue NO OU 0 euruuel 13 L NIM L 84 HOYS QNnosoiNaNdno3 f O N 1SdS HOLIMS 3UNSSIU4 1V3H MO1 sa pejejduico spoued Aejeq 4O 1amojg pue e ung 1sog 1eonpui Ife um na OW isds HOlIMS3unss3Hd SVO MOT Sdo1 pue sindui jejsouueu ou ym eouenbes s juauoduoo ay ejeniui OL TVNINB3L M3HOS ONIBIM 1314 o 3009 SAW 1S 04 30010 en ps 1831 1IN3NOdAO9 OSLO NO HOLONON 2 91 310N YOLONONI an sioyensur jeouroejo anowa 0u Og WT ZWOI OvAv2 ONIHIM TOHINOO qal ON 1548 HOLIMS XOO TEN HOOQ IMOG 40 pesn jou 818 1V3H SVO2. 7 Remove bolts holding motor and motor mount to blower housing and slide motor and mount out of housing Motor mount belly band need not be removed unless motor is to be replaced A CAUTION The blower wheel should not be dropped or bent as balance will be affected 8 Remove blower wheel from housing a Mark cutoff plate location to ensure proper reassembly b Remove screws holding cutoff plate and remove cutoff plate from housing c Lift blower wheel from housing through opening 9 Clean blower wheel and motor using a vacuum with soft brush attachment Do not remove or disturb balance weights clips on blower wheel blades 10 Reinstall blower wheel by reversing items 8 a through c Be sure wheel is positioned for proper rotation 11 Reassemble motor and blower by reversing items 4 through T CAUTION Be sure the motor is properly positioned in A the blower housing The motor arrow must point in the direction of airflow through the furnace after the blower assembly has been reinstalled in the furnace 12 Reinstall blower assembly in furnace 13 Reinstall control If motor has ground wire be sure it is connected as before 14 Connect blower electrical leads to motor Please note that connections are polarized for assembly DO NOT FORCE 15 If power choke is attached to blower housing ensure it is connected in series with black power lead to motor C Cleaning Heat Exchanger The following st
3. z HOLO3NNOO Wal LInOHIO E ed uO10313s MO 1l Sav 10 eoeuinj y pue uos joeuuoosip eu ueeweq M 1eddoo juo asp o wana SILON Q N3931 TLO WM T8 LON S4v lo s Na ax neo ma TBA EN 3 EOS olgj JOHINOD E O 40 dH z 7 T 3ovNund E Wwa snonnunoo evo Sy 18 900 i dag 18 39V157 o Imo sie Ba ana E Dan Po meine a fe t l s o OO aus aws Fo ODO i fen geoooo00 aan wWW ass O9 om 2 we OoOO m yO n n S see na HA 32 Cl 81d 37 H an ul pa ANO IY3HHOIH mm oor i E amp EUIS o 038 AWO IVIR MOI ma ro n L IH IDe moon 8 jig 44083079 m co ov ej LHM a j qau Avia 440 83MO 1 E gt 1L310N aad mae an J en NEO 4 y nol o e xj E wang ye t Sd 2 O SONHO Ama 8 blo SL 310N e E B ma inm Zud mle Cone DOG Ol us Ofaa l O SO go lt p 25 pro vid 32 32 BRE ES FEE ZE GG m Cm 2359 HH f HHH m c 23508 ol o o o e o o o o E m 03S SEI X m wc 03506 T t ed 3 HOLMS Aviso o O ERMOTB Y ST SE Q2 Q2 za 5 m mw IHO OIA E LILON E m m HIH IS F _ aasn NIHM NUON Nid se ayeid Bunes WF LON a y u B ones OUS H eoeuinj uo peyeudisep 0 038 N3HM HOLIMS a 2 zsv IVN seg10 9 g v LO3NNO9SIO Q3Sn3 m Ny dee zile uid 0 8JIM OJA Peuuog Alo x NYO Y S B E sed 3n NIH SaoT sul a Nua o d 2 Ado 6 sun 9 INVE9VIA NOLLOANNOO AN3Wdino3 Service should be performed only by qualified person
4. O1 pue 1 V3H SVO IH 1000 1H seurue 21 lovAsLU ONIBIM H3MOd TI Lads IS EE i n BNN uo u uonisod u31svW ovra ONIHIM TOHLNOO AHOLOVA v an 5 gt F104 03QYHS 033d8 Z HOLON AYY QIONANI wal ul jeduin Buuu deoy siojow je o q ZWOI ULM ponud jou Si Buluuimy 91 OVASI ONIHIM HEMOd AHOLOV vira SOTNDLLOSNNGS Laila AVAR Wil sezis eoeuin Jeujo uo INI INOYIM pau ol ase s10 9euuo9 GTA 5 WNINH3L TOYINOO CON LS4S AV 3H HOLINDI 3OVIBNS LOH YISH Aluo seoeuin ezis Moje Buijooo Qz 10 090 UO pesn si 10NPUL G OVA UA Ino SS Vans ICH ps TWNIWH3L O 10jo9uuoo uId Z1 jo OL Utd e papunosb eq jenu Jonuo9 pL ON 1SdS AVI3HHOIIMS 3HnSS3Hd lV3H HOIH USdH sino 9914 eye S jeoneuiojne JJM 0 1UOQ uoniur J0 sjet i NOLON ON 1SdS HOLIMS 3HnSssud LVZH HOIH SdH Injsseoonsun enjnoesuoo NO Jene n290 IM LNOAOOT NOILIND EL aio 393i 2000 nivis oov FOVLSZ SHOLVU3dO LVAH MOT LNVINN03Y JAVA Svo 18 spuooes 06 S AV 13 3H0 H3MO 18 dund 1eaH Guyoo9 Z GG LSNNOD Seria NINA LINO Mo E SEEN Q3TIVLSNI G all4 ISNA zna 988 z dung eaH u009 spuooes Sp Buneay seo Av Td NO H3MOTB LL x GATWISNI AHOLOVA 3dAL 3QV 18 3ALLONOLNY dW SNA ind OWAPZ OVASL YANHOSSNVEL NEL Ao uogaueseidei peonoj ue ase spoqu S OL io Iuano sonvHo vndas 300410373 HOSN3S INNOH NVH asd pesn jou 457 ueuw pejoeuuoo OA 6 uar ONINNIML rL CO N LSdS 113534 IVNNYW d A3LH3AO HOLIMS LNOTIOY 3WV 4 zSud eurejj ano d O OJ
5. maintenance could cause this fuse to blow If fuse replacement is required use ONLY a 3 amp fuse The control will display code 24 when the fuse needs replacement mA The control in this furnace is equipped with an LED status light to aid in installation servicing and troubleshooting It can be viewed through the sight glass or window on the blower access door The control indicates status with the LED on continuously rapid flashing or a code composed of 2 digits The first digit is the number of short flashes the second is the number of longs flashes Refer to the service label on the blower compartment door for code explanations and useful troubleshooting suggestions See Fig 10 It is important to note that power to the furnace must not be interrupted and the furnace blower door must not be removed until the LED status code es is recorded When power to the control is interrupted the status memory is erased The control will store up to 5 previous codes but will not store non current codes longer than 48 hr To retrieve previous codes if present no thermostat inputs to the control must be present and all time delays must expire Remove 1 of the red main limit wires 1 to 4 sec until the LED light goes out then reconnect it See Fig 4 Do not leave red wire disconnected for longer than 4 sec as the control will assume an overtemperature condition exits and will respond with indoor blower operation This places the control
6. other open flame to check for gas leaks Use a soap and water solution A failure to follow this warning could result in fire personal injury or death D Electrical Controls and Wiring NOTE There may be more than 1 electrical supply to unit The electrical ground and polarity for 115 v wiring must be maintained properly Refer to Fig 7 and 8 for field wiring information and to Fig 9 for unit wiring information If the polarity is NOT correct the furnace control will display rapid flashing on the status LED and prevent heat operation The control system also requires an earth ground for proper operation of the microprocessor and variable speed motor NOTE Be aware that measurement of current amperes and power watts for the ICM2 variable speed motor will be accurate only when the meter provides true root mean square RMS measurements With power disconnected from unit check all electrical connec tions for tightness Tighten all screws on electrical connections If any smoky or burned connections are noticed disassemble the connection clean all parts and stripped wire and reassemble properly and securely Electrical controls are difficult to check without proper instrumentation therefore reconnect electrical power to unit and observe unit through 1 complete operating cycle The 24 v circuit contains an automotive type 3 amp fuse located on the main control Any 24 v electrical shorts during installation service or
7. 1 STAGE FIVE MO QO 00 THERMOSTAT FIELD SUPPLIED WIRE FUSED DISCONNECT THREE WIRE t e _e Es HEATING b e 9 208 230 OR ONLY ENS 5 460 V ET D e e 0 THREE JE 1i Leer e PHASE P UN NE M i scd e e lei el 208 230 V GND a NOTES eJre lei ez SINGLE 115 V FIELD JUNCTION Eos 10 ae aa SUPPLIED BOX en len it E FUSED CONTROL j CONDENSING DISCONNECT BOX 4 pem P UNIT Ars 6 ay y NOTE 4 TERMINAL NOTES 1 Connect Y Y2 terminal as shown for proper operation BLOCK 2 Some thermostats require a C terminal connection as shown FURNACE 3 If any of the original wire as supplied must be replaced use same type or equivalent wire 4 Y1 is not to be connected ur 5 5 Connect O to thermostat O only for heat pump applications M A oT A97588 Fig 7 Heating and Cooling Application Wiring Diagram for Single Stage Thermostats and or Single Speed Condensing Units FIELD 24 V WIRING FIELD 115 208 230 460 V WIRING FACTORY 24 V WIRING FACTORY 115 V WIRING NOTE 2 2 STAGE SEVEN H 9 3 9 S THERMOSTAT FIELD SUPPLIED ES EA TERMINALS FUSED DISCONNECT FOUR WIRE Pg E e e el Tiere HEATING 208 230 OR ONLY 1 ere e 460 V i e e 4 THREE bo dg B __ PHASE pas a Pd e e e 208 230 V l SINGLE aes tas einai 77 PHASE 115 V FIELD JUNCTION N EAS RS SUPPLIED BOX GIA Dog ler e FUSE
8. D CONTROL AAA Lolas 2 SPEED DISCONNECT BOX 9 Fan RG ee CONDENSING e e 1 UNIT AFS Su v TERMINAL NOTES 1 Connect Y1 and Y Y2 as shown for proper operation BLOCK 2 Some thermostats require a C terminal connection as shown FURNACE 3 If any of the original wire as supplied must be replaced use same type or equivalent wire Tor P 4 Connect O to thermostat O only for heat pump applications O A97589 Fig 8 Heating and Cooling Application Wiring Diagram for 2 Stage Thermostats and or 2 Speed Condensing Units EL gt Z8SZ6V weibeig Buin HUN 6 614 310N 139 NV SNONNILNOO 01 I Ds N IN o uM 2 m m lt o 6 310N Sd91 a3sn N3HM ma WI9 1H8 ssa 6 LON 407 1H8 aasn N3HM IVA 9038 War vdd OVASIL W3lsvi Xo 6d 9 310N NM ul uadWnr ONINNIML AVIS ea cc 807 IHI Ova vova SION NOWNOO 3000 E y 1 3uvds ON E lV3H SVO H Sd w3H sv9 01 F YMd WM 1a Sd LNM 338 419 1H8 lHO1 1H8 HOLIMS LOANNOOSIG 1314 OVAS OL isal NIML u lt n 310N 8 EN 3NvdOHd SVO IVEN LVN WvHOVIa 9LLVIN3HOS I y QNnouS
9. IT SWITCHES AIRFLOW SELECTOR CONTROL WASHABLE FILTER FILTER RETAINER A95270 Fig 4 Upflow Horizontal Component Identification c Slide filter out d Clean filters by spraying tap water through filter from opposite direction of airflow e Rinse and let dry Oiling or coating of filter is not recommended or required f Place filter in furnace g Replace blower and control access doors and turn on electrical supply to furnace B Blower Motor and Wheel For long life economy and high efficiency clean accumulated dirt and grease from the blower wheel and motor annually The following steps should be performed by a qualified service technician The motors have prelubricated sealed bearings and require no lubrication Remember to disconnect the electrical supply before removing access doors pat E Clean as follows 1 Remove blower access door 2 Disconnect blower electrical leads from motor Squeeze latches to remove connectors from motor Disconnect green ground wire from screw Note location of wires for reas sembly 3 Remove control 4 Remove screws holding blower assembly to blower deck and slide blower assembly out of furnace 5 Mark blower wheel motor and motor support in relation to blower housing before disassembly to ensure proper reas sembly 6 Loosen setscrew s holding blower wheel on motor shaft
10. JUOO 104 JEJU Jeays aoeuun 0 parpeuuoo eqisnu BIM SYL 8 niga igs CON LSAS L3S3YIWNNWW dW3lH3AO HOLIMS LNOTION INVA 193 sjapow moyumop SSMO NOWINOO NOLLO3NNOO H3NV31OHIV OINOHIO3HH z ov3 awos pue jeuozuou awos uo pasn Z 8 LS Ty Seyolms ywy Arexny MS ONILLAS AVEO dJOU3MOTS v95MS XVW ANY L OVA SH NOLLOSNNOO H3NV3TO HIV OINOHLO313 L OV3 Teen Muze uw Hub eos deti TUNNVIN LSdS HOLIMS ATNO LYH MOT ZMS CON HAMON LN SA e x Y dV UUM I ey 9 UIVONVIN 1SdS HOLIMS ATNO 1V3H HOIH IMS AULINOUIO ONY HOSS30OHdOHOIW nao s ndu samod Jo pue o3uoo e 440 Bulun Aq yasay 440 490 1 uoruw aye NOLaNNOS IMDLIOSL pa FON SPI UBL OM amor cu 12 sejnuiul Z 104 Spuooes c ena peiduiege si uejsey SYNIO 01109 DUO Dao HOLO3NNOO LINOMIO S Sld HIMOd HMd OHINOO LO MzWOI HOLON HINON NAOS uepunpa Aq pajoajoid peojie o 10101 pex0 S MI JO OW jeMO g G y i r ES y sidia Ao indo uo ein HOLOINNOO UNOUIO L hz 14S AVTaY 3ONVHO 0334S HOLON H3MOTA 410 1H8 a ala al a A s la ue a an I YOLO3NNOO ISH LINOUIO od 1048 W134 3ONVHO 0334 HOLON H3MOT8 07 1H8 wna MORENE 08S MIGROS EU 1 22 SUDIROPRS MOLI ION Bv 91 310N HO1O3NNOO LINOUIO b Sd oN 1SdS 13838 OLNW dWalH3AO HOLIMS LINI AYYNIXAY 2S1W 10 owws pepeo ewei jeser oyne feureiut SUIPIUOD aiou Gd jeonpu MOLO3NNOO LINDHIO 9 vid CON LSdS 13S3H IVNVW dWalH3AO HOLIMS INT ABVTIXDV ST adj Jusjen nba Jo ewes eu esn peoejdei eq jsnui eii euiDuo ayy jo Aue
11. OLTAGE FUSE IS OPEN Check for Short circuit in secondary voltage 24V wiring 31 HIGH HEAT PRESSURE SWITCH OR RELAY DID NOT CLOSE OR REOPENED Check for Control relay may be defective Refer to 32 32 LOW HEAT PRESSURE DRAFT SAFEGUARD OR AUX LIMIT DOWNFLOW ONLY SWITCH DID NOT CLOSE OR REOPENED Check for Proper vent sizing and condensate pitch with side wall vent Low inducer voltage 115v Blower motor and capacitor Defective inducer motor Defective pressure switch Excessive wind Restricted vent Inadequate combustion air supply Disconnected or obstructed pressure tubing LIMIT OR FLAME ROLL OUT FRS SWITCH IS OPEN FRS switch requires manual reset Check for Inadequate combustion air supply FRS switch only Dirty filter or restricted duct system Loose blower wheel Defective switch or connections Blower motor or capacitor failure IGNITION PROVING FAULT Control will retry three times before lockout 14 Check for Oxide buildup on flame proving sensor clean with fine sandpaper Proper flame proving microamps 0 5 minimum Proper control ground continuity Flame proving sensor must be ungrounded Smooth flame carryover and ignition Manual valve s OFF LOW HEAT PRESSURE DRAFT SAFEGUARD OR AUXILIARY LIMIT SWITCH OPEN WHILE HIGH HEAT PRESSURE SWITCH IS CLOSED Check for Disconnected or obstructed pressure tubing Defective pressure switch stuck open Refer to 32 and 33 REPLACE CONT
12. ROL 320893 101 REV A A94169 Fig 10 Service Label 3 NOTES TROUBLESHOOTING Refer to information label on blower compartment door GUIDE A WARNING for procedure for use of LED status codes and problem Solving suggestions i Se ee through window in blower ELECTRICAL SHOCK HAZARD If 115 vac power is de energized or interrupted during a call for heat the indoor blower will run for 90 sec au QUALIFIED AND TRAINED before a gas heating cycle begins Code 12 F 3 A F RVICE PERSONNEL SHOULD After replacing any component verify correct operating If LED is flashing rapidly check line voltage polarity PERFORM THIS PROCEDURE sequence e If Code 24 is displayed check for blown fuse If LED is OFF check line voltage and 24 v transformer START is di e If Code 45 is displayed replace control Sy 24v should be present across R Yes and C If not check for Turn thermostat OFF a Is indoor blower on I 1 Open flame rollout switch On furnace control note current No FRS Code 33 settings for setup switches 1 SW 1 ee oe 2 Open limit switch LS and 2 SW 2 then set SW 1 to OFF 24v should be present across C and W If not check f
13. after 45 sec PP See 2 Stage Gas Fired Induced Combustion Furnaces warm up period Troubleshooting Guide PSC and ICM Blower Motors Yes e f not check for 1 Satisfied thermostat y No 2 Open inlet gas pressure switch when used Furnace runs until call for 3 Open pressure switch LPS Code 32 heat ends 4 Open draft safeguard switch DSS Code 32 y 5 Open auxiliary limit ALS downflow only Code 32 No Replace control only if Code 45 is es 6 Open 24 v fuse FU1 Code 24 displayed or if all checks are OK 7 Open limit switch LS Code 13 or 33 Turn thermostat to OFF gas valve No 8 Open flame rollout switch FRS Code 13 or 33 shuts off poa 5 sec inducer 9 Check 115 v line voltage LED off ost purge PD Check for sources of electrical noise interference electronic air Y Yes cleaners nearby TV or radio antennas No cod PO Se SopS Pger gt e If inducer and burners continue to operate check for 24v at the 7 4 gd gas valve If 24v are present verify that the thermostat is open No Replace control only if Code 45 is Y Y across R and W If no voltage is present turn the gas valve displayed or if all checks are OK es control knob to the OFF position Replace gas valve Heating sequence of operation complete Remove blower door 24v should be present across R and C If not check for move setup switch 1 SW 1 to ON 1 Open limit switch LS Code 13 or 33 l position and repeat p
14. eat exchanger cells before cleaning 7 Insert brush end of cable in lower opening of cell and proceed to clean 2 lower passes of cell in same manner as 2 upper passes 8 Repeat foregoing procedures until each cell in furnace has been cleaned 9 Using vacuum cleaner remove residue from each cell 10 Using vacuum cleaner with soft brush attachment clean burner assembly 11 Reinstall cell outlet plates and screws FIRST then reinstall cell inlet plates and burner assem bly Care must be exercised to center the burners in the cell openings 8 After cleaning flue openings clean flue collector Check sealant on flue collector to ensure that it has not been damaged If new sealant is needed contact your dealer or distributor 9 Replace flue collector assembly making sure all 8 screws are secure 10 Reinstall relief box 11 Reconnect wires to the following components a Draft safeguard switch b Inducer motor c Pressure switches d Limit overtemperature switch es e Gas valve f Hot surface ignitor g Flame sensing electrode h Wiring connectors leading to control 12 Reconnect vent pipe to relief box 13 Replace blower door only 14 Turn power and gas to ON 15 Set thermostat and check furnace for proper operation 16 Verify blower airflow and that airflow rate changes between heating and cooling 17 Check for gas leaks 18 Replace control door WARNING Never use a match or
15. electricity for example DO NOT move or shuffle your feet DO NOT touch ungrounded objects etc 4 If you touch ungrounded objects recharge your body with static electricity firmly touch furnace again before touch ing control or wires 5 Use this procedure for installed and uninstalled un grounded furnaces 6 Before removing a new control or motor from its container discharge your body s electrostatic charge to ground to protect the control or motor from damage If the control or motor is to be installed in a furnace follow items 1 through 5 before bringing the control or motor or yourself into contact with the furnace Put all used AND new controls and motors into containers before touching ungrounded objects 7 An ESD service kit available from commercial sources may also be used to prevent ESD damage CARE AND MAINTENANCE For continuing high performance and to minimize possible equip ment failure it is essential that periodic maintenance be performed on this equipment Consult your local dealer as to the proper frequency of maintenance and the availability of a maintenance contract WARNING Never store anything on near or in contact with the furnace such as 1 Spray or aerosol cans rags brooms dust mops vacuum cleaners or other cleaning tools 2 Soap powders bleaches waxes or other cleaning compounds plastic or plastic containers gasoline kero sene cigarette lighter fluid dry cleaning f
16. eps should be performed by a qualified service technician NOTE Deposits of soot and carbon indicate the existence of a problem which needs to be corrected Take action to correct the problem If it becomes necessary to clean the heat exchanger because of carbon deposits soot etc proceed as follows 1 Turn gas and power to furnace to OFF 2 Remove control and blower access doors 3 Disconnect wires to the following components Mark wires to aid in reconnection of Draft safeguard switch o p Inducer motor Pressure switch es a a Limit overtemperature switch es Gas valve Hot surface ignitor Flame sensing electrode mos rm Oo Wiring connectors leading to control 4 Remove 2 screws that secure relief box See Fig 4 5 Remove 8 screws that secure flue collector box to center panel Be careful not to damage sealant 6 Remove complete inducer assembly from furnace exposing flue openings 7 Using field provided small wire brush steel spring cable reversible electric drill and vacuum cleaner clean cells as follows a Assemble wire brush and steel spring cable 1 Use 48 in of 1 4 in diameter high grade steel spring cable commonly known as drain clean out or Roto Rooter cable 2 Use 1 4 in diameter wire brush commonly known as 25 caliber rifle cleaning brush NOTE The materials needed in items 1 and 2 can usually be purchased at local hardware stor
17. es 3 Insert twisted wire end of brush into end of spring cable and crimp tight with crimping tool or strike with ball peen hammer TIGHTNESS IS VERY IMPORTANT 4 Remove metal screw fitting from wire brush to allow insertion into cable b Clean each heat exchanger cell 1 Attach variable speed reversible drill to end of spring cable end opposite brush 2 Remove cell outlet plates IMPORTANT Replace screws in center panel to secure heat exchanger cells before cleaning 3 Insert brush end of cable into upper opening of cell and slowly rotate with drill DO NOT force cable Gradually insert at least 36 in of cable into 2 upper passes of cell See Fig 5 A91252 Fig 5 Cleaning Heat Exchanger Cell 4 Work cable in and out of cell 3 or 4 times to obtain sufficient cleaning DO NOT pull cable with great force Reverse drill and gradually work cable out 5 Remove burner assembly and cell inlet plates NOTE Be very careful when removing the burner assembly to avoid breaking the ignitor See Fig 6 for the correct ignitor location 13 32 11 32 CELL E PANEL TR HOT SURFACE IGNITOR ASSEMBLY LL i IGNITOR N E T a BURNER IGNITOR ASSEMBLY Fig 6 Position of Ignitor to Burner 93347 6 IMPORTANT Replace screws in center panel to secure h
18. h the unit and other safety precautions that may apply Follow all safety codes In the United States follow all safety codes including the National Fuel Gas Code NFPA No 54 1996 ANSI Z223 1 1996 In Canada refer to the current edition of the National Standard of Canada CAN CGA B149 1 and 2 M95 Natural Gas and Propane Gas Installation Codes Wear safety glasses and work gloves Have fire extinguisher available during start up and adjustment procedures and service calls Recognize safety information This is the safety alert symbol N When you see this symbol on the furnace and in instructions or manuals be alert to the potential for personal injury Understand the signal words DANGER WARNING and CAU TION These words are used with the safety alert symbol DAN GER identifies the most serious hazards which will result in severe personal injury or death WARNING signifies a hazard which could result in personal injury or death CAUTION is used to identify unsafe practices which would result in minor personal injury or product and property damage SP04 43 SP04 50 10 97 Cancels WN 910011110 A95137 Fig 1 Model 333BAV or 333JAV Horizontal EFFICIENCY RATING CERTIFIED ama CANADIAN GAS ASSOCIATION APPROVED R A94085 US gt 9001 HM Fig 2 Model 333BAV or CERTIFICATION OF 333JAV Upflow MANUFACTURING SITE WARNING The ability
19. in the status recall mode and displays the first code stored in memory Record the code and repeat the disconnect and reconnect of the red wire recording each code until code 11 is displayed indicating no additional faults After the last code is displayed or after 2 minutes in the code recall mode the control will return to normal standby mode Use any recorded status codes the service label and the trouble shooting diagram on the following pages to diagnose and correct any problem condition E Troubleshooting Refer to the service label See Fig 10 Page 9 contains a troubleshooting guide This guide can be a useful tool in isolating furnace operation problems Beginning with the word Start answer each question and follow the appropriate arrow to the next item The guide will help to identify the problem or failed component After replacing any component verify correct operation sequence More information is available in a separate Troubleshooting Guide for 2 stage gas fired induced combustion furnaces FIELD 24 V WIRING FIELD 115 208 230 460 V WIRING FACTORY 24 V WIRING FACTORY 115 V WIRING NOTE 2
20. ion A Air Filter Arrangement The air filter arrangement may vary depending on the application Refer to Table 1 for filter size information WARNING Never operate unit without a filter or with filter access door removed A failure to follow this warning could result in fire personal injury or death Upflow and horizontal Each furnace requires 1 or 2 filters which are installed in the blower compartment See Fig 4 To remove filters for cleaning or replacement proceed as follows TABLE 1 UPFLOW HORIZONTAL FILTER SIZE INFOR MATION IN FILTER SIZET FURNACE CASING WIDTH Side Return Bottom Return FILTER TYPE 14 3 16 1 16 X 25 X 1 1 14 X25 X1 Cleanable 21 1 16 X 25 X 1 1 20 X25 X t Cleanable 24 1 2 2 16X 25 X 1 1 24 X 25 X 1 Cleanable Factory provided with the furnace T Filters may be field modified as required by cutting and folding the frame as indicated on the filter a Turn off electrical supply before removing blower and control access doors b Release filter retainer from clip at front of furnace casing See Fig 4 For side return clips may be used on either or both sides of the furnace MOUNTING SCREWS lb nae SAFEGUARD DRAFT A TW SWITCH SERERE ee X Vb J ALD SUN PRESSURE MAIN SWITCHES LIMIT SWITCH MANUAL RESET LIM
21. l lockout after 4 attempts e Is the gas valve control knob in the OPEN or ON position 24v should be present across the gas valve terminals C and M P 15 sec inducer pre purge lt and C and HI for high stage test during the 7 sec ignition trial If not check all low voltage wiring connections to valve Y Yes e If 24v are present and main gas does not flow No R f gt LL Replace control only if Code 45 is 1 Is supply pressure between 4 5 and 13 6 in wc If not A p Ignitor warms up and glows No adjust Supply piecing displayed or if all checks are OK orange yellow 17 sec warm up 2 If supply pressure is between 4 5 and 13 6 in we replace 1 Y gas valve kis No Check ignitor position Main burners ignite gt Check burner carryover gap Y Yes Check manifold pressure 1 3 to 1 7 in wc for low stage gas heat 3 2 to 3 8 in wc for high stage gas heat Check for proper orifice size Is Code 31 high gas heat only 32 33 or 34 displayed Check Y i code information label to diagnose Replace control if Code 45 is dis Main burners stay on L _3 Check polarity of 115 v power at J box and control Rapid No played or if all checks are OK flashing LED Clean flame sensor if microamps Y Yes Check ground continuity from J box to control are below nominal Check flame sensor microamps 4 0 nominal 0 5 minimum for Y control to recognize flame Indoor blower motor starts on No heating speed
22. luids or other volatile fluids 3 Paint thinners and other painting compounds paper bags or other paper products A failure to follow this warning could result in corrosion of the heat exchanger fire personal injury or death WARNING Turn off the gas and electrical supplies to the unit before performing any maintenance or service on it Follow the operating instructions on the label attached to the furnace A failure to follow this warning could result in personal injury CAUTION As with any mechanical equipment per sonal injury can result from sharp metal edges etc therefore be careful when removing parts The minimum maintenance that should be performed on this equipment is as follows 1 2 Check and clean air filter each month or more frequently if required Replace if torn Check blower motor and wheel for cleanliness each heating and cooling season Clean as necessary Check electrical connections for tightness and controls for proper operation each heating season Service as necessary CAUTION If motor is removed from blower assembly the motor MUST be reinstalled so arrow on end of the motor is pointing in the direction of airflow through the furnace The belly band MUST be the specified distance from the motor end shield surface at the shaft end See Fig 3 A95268 DIMENSIONS IN FURNACE SIZE D 036060 048080 060100 060120 Fig 3 Motor Belly Band Locat
23. or Code 33 a and SW 2 to ON 1 Open thermostat 3 Check all low voltage wiring 2 Open 24 v fuse FU1 Code 24 connections Y 3 Failed transformer Y N o Cycle 115 v power e If Code 23 is displayed the pressure switch es is stuck closed off for 3 sec then on Replace switch and or check pressure tube for blockage No Replace control d if all checks are OK Y System malfunction Code 21 No 115v should be present at the inducer motor If so replace inducer Continuous LED gt motor If not check 115 v wiring Yes If Code 32 is displayed check for Set thermostat to call for heat 1 Open gas inlet pressure switch when used Set FAN to AUTO 2 Open pressure switch LPS and or tube Code 32 3 Open draft safeguard switch DSS Code 32 4 Open auxiliary switch ALS downflow only Code 32 No Replace control only if Code 45 is DG CES No 5 Check all low voltage wiring connections displayed or if all checks are OK Fer IUCR MOD STATS 115v should be present at the ignitor If so replace the ignitor if not check 115 vac wiring to ignitor Yes Qe No LPS DSS or ALS open while HPS is closed high gas heat only Is Code 22 displayed gt Code 43 Y Yes A A i A Control will attempt to light burners 4 times approximately 1 minute Flame present when not normal Y between attempts Code 34 Voltage is present at the gas valve for 7 Replace gas valve sec during each ignition trial System wil
24. rocess to check L 2 Open flame rollout switch FRS Code 13 or 33 No Replace control only if Code 45 is high stage gas heat operation displayed or if all checks are OK When finished return SW 1 and 24v should not be present across R and G If so turn thermostat SW 2 to original desired settings FAN switch to AUTO A96062 10 SERVICE TRAINING Packaged Service Training programs are an excellent way to increase your knowledge of the equipment discussed in this manual including Unit Familiarization Maintenance Installation Overview Operating Sequence A large selection of product theory and skills programs is available using popular video based formats and materials All include video and or slides plus companion book Classroom Service Training plus hands on the products in our labs can mean increased confidence that really pays dividends in faster troubleshooting fewer callbacks Course descriptions and schedules are in our catalog CALL FOR FREE CATALOG 1 800 962 9212 Packaged Service Training Classroom Service Training A94328 1997 Bryant Heating amp Cooling Systems 7310 W Morris St Indianapolis IN 46231 12 Printed in U S A sp0450 Catalog No 5333 301
25. s SERVICE If status code recall is needed do not remove power or blower door LED CODE STATUS CONTINUOUS OFF Check for 115V at L1 and L2 and 24V at SEC1 and SEC2 CONTINUOUS ON Control has 24V power RAPID FLASHING Line voltage polarity reversed If twinned 24V power to one furnace may be out of phase with power to other furnace EACH OF THE FOLLOWING STATUS CODES IS A TWO DIGIT NUMBER WITH THE FIRST DIGIT DETERMINED BY THE NUMBER OF SHORT FLASHES AND THE SECOND DIGIT BY THE NUMBER OF LONG FLASHES 11 NO PREVIOUS CODE Stored status codes are erased when power 115V or 24V to control is interrupted or 48 hours after each fault is cleared 12 BLOWER ON AFTER POWER UP Blower runs for 90 seconds if unit is powered up during a call for heat R W W1 closed Note 2 sec ON delay 13 LIMIT OR FLAME ROLL OUT FRS SWITCH LOCKOUT Auto reset after three hours FRS switch requires manual reset Check for Refer to 33 14 IGNITION LOCKOUT Control will auto reset after three hours Refer to 34 21 GAS HEATING LOCKOUT Control will NOT auto reset Check for Mis wired gas valve Defective control valve relay 22 ABNORMAL FLAME PROVING SIGNAL Flame is proved while gas valve is de energized Inducer will run until fault is cleared Check for Leaky gas valve Stuck open gas valve 23 LOW OR HIGH HEAT PRESSURE SWITCH DID NOT OPEN Check for Obstructed pressure tubing Defective pressure switch stuck closed 24 SECONDARY V
26. service and maintenance procedures UPFLOW HORIZONTAL VARIABLE SPEED 2 STAGE INDUCED COMBUSTION FURNACES 333BAV 333JAV Series B NOTE Read the entire instruction manual before performing any service or maintenance This symbol indicates a change since the last issue These procedures are for size 60 000 through 120 000 Btuh units Index Page SAFETY CONSIDERATIONS eene 1 ELECTROSTATIC DISCHARGE ESD PRECAUTIONS PROCEDURE starte 422er 2 CARE AND MAINTENANCE ceneenenesenesenenennene 2 5 Air Filter Arrangement 2 3 Blower Motor and Wheel esee 3 Cleaning Heat Exchanger sese 3 5 Electrical Controls and Wiring eee 5 Troubleshooting esee 2 Application Wiring Diagrams eee 6 Unit Wiring Diagram s Service Label 8 Troubleshooting Guide esee 9 SAFETY CONSIDERATIONS Installing and servicing heating equipment can be hazardous due to gas and electrical components Only trained and qualified person nel should install repair or service heating equipment Untrained personnel can perform basic maintenance functions such as cleaning and replacing air filters All other operations must be performed by trained service personnel When working on heating equipment observe precautions in the literature tags and labels attached to or shipped wit
27. to properly perform mainte nance on this equipment requires certain expertise me chanical skills tools and equipment If you do not possess these items do not attempt to perform any maintenance on this equipment other than those proce dures recommended in the User s Manual A FAILURE TO FOLLOW THIS WARNING COULD RESULT IN POSSIBLE DAMAGE TO THIS EQUIPMENT SERI OUS PERSONAL INJURY OR DEATH ELECTROSTATIC DISCHARGE ESD PRECAUTIONS PROCEDURE CAUTION Electrostatic discharge can affect electronic components Take precautions during furnace installation and servicing to protect the furnace electronic control and motor Precautions will prevent electrostatic discharges from personnel and hand tools which are held during the procedure These precautions will help to avoid exposing the control to electrostatic discharge by putting the furnace the control the motor and the person at the same electrostatic potential 1 Disconnect all power to the furnace DO NOT TOUCH THE CONTROLS OR ANY WIRE CONNECTED TO THE CONTROLS PRIOR TO DISCHARGING YOUR BODY S ELECTROSTATIC CHARGE TO GROUND 2 Firmly touch a clean unpainted metal surface of the furnace chassis which is close to the controls Tools held in a person s hand during grounding will be satisfactorily discharged 3 After touching the chassis you may proceed to service the controls motor or connecting wires as long as you do nothing that recharges your body with static
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