Bryant 120 manual

Install ation , Start - - up , Operati ng and Ser vice a nd Mainte nance Instructions Series 120/C 312A 2 --- S t a g e D e l u x e I n d u c e d --- C o m b u s t i o n 4 - - - W ay Mult ipo ise Fur nace SAFETY CONSIDERA TIONS 2 ........................ INTRODUCTI ON 3 .................................. CODES AND ST ANDARDS 5 .....................[...]

2 2-7/16" 1-1/8" 28-7/8" 25-1/4" 22-9/16" JUNCTION BOX LOCATION 7/8" DIA ACCESSORY 1/2" DIA THERMOSTAT WIRE ENTRY 3-15/16" LEFT HAND GAS ENTRY 33-5/16" 24-7/8" 5-1/2" 7/8" DIA. ACCESSORY 11/16" 21-5/8" BOTTOM INLET 1-11/16" 13/16" 11/16" 4-13/16" AIRFLOW 19&qu[...]

3 T a ble 1 – Dimen sio ns (In.) FURNACE SI ZE A CABI NET WIDTH (IN.) D SUPPL Y - - - AIR WIDTH (IN .) E RETURN - - - AIR WIDTH (IN .) F C.L. TOP AN D BOT T OM FLUE COLLA R (IN.) FL UE COL LAR* (IN.) SHIP W T . (LB) FIL T ER MEDIA CABI NET SIZE (IN.) 045 - - - 08/024045 14 - - - 3/ 16 12 - - - 9/16 12 - - - 11/16 9 - - - 5/16 4 116 16 045 - - - 1[...]

4 MINIMUM INCHES CLEARANCE TO COMBUSTIBLE CONSTRUCTION DISTANCE MINIMALE EN POUCES AUX CONSTRUCTIONS COMBUSTIBLES INSTALLATION 327590-101 REV. C Ø * Clearance arrows do not change with furnace orientation. BOTTOM DESSOUS 0 " 3" 0" 0" 1" 0" 24" MI N S I D E C Ô T É F R O N T A V A N T B C K A R R I È A E R S E [...]

5 60 80 A04036 Fig . 3 - - R etu rn A ir T emp era ture CODES AND ST ANDARDS Foll ow all national and local c ode s and standar ds in additi on to th ese in structio n s. Th e in stallation mu st co mp ly with re gulat ions of t he s er ving gas s upplie r , loca l buil di ng, he a ti ng, plum bing, and othe r code s . In abs enc e of loc al codes [...]

6 THE BLOWER IS LOCA TED T O THE RIGHT OF THE BURNER SECTION, AND AIR CONDITIONED AIR IS DISCHARGED T O THE LEFT . THE BLOWER IS LOCA TED BELOW THE BURNER SECTION, AND CONDITIONED AIR IS DISCHARGED UPW ARD . THE BLOWER IS LOCA TED ABOVE THE BURNER SECTION, AND CONDITIONED AIR IS DISCHARGED DOWNW ARD THE BLOWER IS LOCA TED TO THE LEFT OF THE BURNER [...]

7 FIRE, INJUR Y OR DEA TH HAZARD Fai l ure to fol low t his wa rning c ould r e sul t in pe r sona l inj ury , de at h, a nd/or pr oper ty dama ge. Wh en the furn ace is installed i n a resid en tial garage, the bu rn ers an d ig n ition so urces mu st b e lo cated at least 1 8 inc he s above t he f loor . The f urna c e must be loc at ed or pro te[...]

8 equi ppe d wit h me a ns t o pre vent ope r at ion of e it her unit unle ss the da mpe r is i n the ful l- - hea t or full- - cool posi t ion. AIR FOR COMBUSTION AND VENTILA TION Pro v ision s fo r adeq uate co mb u stion , ven tilation , an d d ilutio n air mu st b e pro v id ed in accord ance w ith : U.S . installatio n s: S ectio n 8 .3 of th [...]

9 1 SQ IN. PER 4000 BTUH* DUCTS TO OUTDOORS 1 SQ IN. PER 4000 BTUH* CIRCULA TING AIR DUCTS VENT THROUGH ROOF D B A C E 1 SQ IN. PER 4000 BTUH* DUCT TO OUTDOORS CIRCULA TING AIR DUCTS 1 SQ IN. PER 2000 BTUH* 1 SQ IN. PER 2000 BTUH* DUCTS TO OUTDOORS 12 ″ MAX 12 ″ MAX 12 ″ MAX Use any of the f ollowing combinations of openings: A & B C &[...]

10 T abl e 3 – Mi nimum Spac e V olum es f or 100% Combust ion, V ent ilat ion, and Dil uti on fr om Indoor s ACH OTHER THAN FAN - - - ASSISTED TOT AL (1, 000s BTUH GAS IN PUT RATE) FAN - - - A SSIST ED TOTAL (1, 000s BTUH GAS IN PUT RATE) 30 40 50 44 66 88 110 132 154 S p a c eV o l u m e( f t3 ) 0.60 1,050 1,400 1,750 1,100 1,650 2,200 2,750 3,[...]

11 A02098 Fig. 9 - - Rem oving Bott om Closur e Panel Lev eling L egs (If D esir ed) In u p flow po sitio n w ith sid e return in let(s), lev eling l egs m ay be use d. (See Fig. 10.) Ins ta ll fi e ld- - suppl ie d, 5/16 X 1 - - 1/2 in. ( max) corro sio n - - resistant m ach ine b o lts, wash ers an d n u ts. NOTE : B o ttom closu re mu st be u se[...]

12 under neat h furna ce mus t be le vel a nd the furna ce se t on blocks or bri c ks. Roll- - Out Pr o tection Provi de a mi nimum 17- - 3/4 in. X 22 in. pi ec e of s hee t meta l for flame ro ll - - ou t p rot ection in fro n t of bu rn er area fo r fu rnaces cl os er t han 12 inc hes above t he combus ti ble de ck or sus pende d furn aces clo se[...]

13 T able 4 – Opening di me nsi ons ( In. ) FURNACE CASIN G WIDTH APPLICATION PLEN UM OPENI NG FL OOR OPENING A B C D 14–3/16 Upfl ow Appl ic ati ons o n Combust ibl e or Nonc om bust ibl e Fl oori ng (KGA SB subbas e not requi red) 12 - - - 11/ 16 21 - - - 5/8 13 - - - 5/16 22 - - - 1/ 4 Downflow Ap plication s on N oncombu stible Flooring (KG[...]

14 1 / 4 " THREADED ROD 4 REQ. SECURE ANGLE IRON T O BO TT OM OF FURNACE WITH 3 #8 x 3 / 4 " SCREWS TYPICAL FOR 2 SUPPORTS 1" SQU ARE, 1 1 / 4 " x 1 1 / 4 " x 1 / 4 " ANGLE IRON OR UNI-STR UT MA Y BE USED (2) HEX NUTS, (2) WASHERS & (2) L OCK W ASHERS REQ. PER ROD 8" MIN FOR DOOR REMO V AL OUTER DOOR ASSEMBL Y[...]

15 30-IN. MIN WORK AREA 6 ″ MIN* TYPE-B VENT 17 3 / 4 ″ 22 ″ SHEET MET AL SEDIMENT TRAP EQUIPMENT MANU AL SHUT -OFF GAS V AL VE LINE CONT ACT ONL Y PERMISSIBLE BETWEEN LINES FORMED BY INTERSECTIONS OF THE T OP AND TWO SIDES OF THE FURNA CE JA CKET AND BUILDING JOISTS , STUDS, OR FRAMING. GAS ENTR Y 17 3 / 4 ″ O VER ALL 4 3 / 4 ″ UNDER DOO[...]

16 T a ble 5 – A ir Deliv ery - - CF M (With F ilter)* FURNACE SIZE RETURN - - - AIR INLET SPEED EXTE RNAL STATIC PR ES SURE (IN. WC) 0.1 0.2 0.3 0.4 0. 5 0.6 0.7 0.8 0.9 1.0 045 - - - 08 / 024045 Bottom or Side( s) High M e d --- High M e d --- L o w Low 1120 930 820 725 1075 890 785 690 1020 850 750 655 960 805 700 605 895 750 650 555 815 680 5[...]

17 110 - - - 22 / 066110 Bottom O nly High M e d --- High Me- dium M e d --- L o w Low 2530 2225 1895 1565 1320 2460 2190 1885 1555 1295 2380 2135 1865 1535 1265 2285 2075 1820 1505 1235 2200 1995 1770 1465 1205 2085 1910 1700 1410 1160 1970 1805 1610 1350 1105 1835 1695 1520 1265 1035 1695 1565 1410 1175 950 1545 1430 1290 1050 870 Bottom Sid es o[...]

18 T a ble 5 - - A ir Deliv ery - - C F M (With F ilter)* (C o nt.) FURNACE SIZE RETURN - - - AIR INLET SPEED EXTE RNAL STATIC PR ES SURE (IN. WC) 0.1 0. 2 0.3 0. 4 0.5 0.6 0.7 0.8 0.9 1.0 135 - - - 16 / 048135 Bottom or Side( s) High M e d --- H i g h M e d --- L o w Low 2090 1790 1545 1325 2010 1755 1525 1320 1930 1705 1500 1295 1835 1640 1450 12[...]

19 A02075 Fig. 18 - - Upfl ow Re tur n Ai r Conf igur ations and Re s tr ic t ions A02163 Fig. 19 - - Downfl ow Re tur n Ai r Conf i gurat ions and Re str ic tions A02162 Fig. 20 - - Hori zont al R et urn A ir Conf igur ations and Re s tr ic t ions 312A[...]

20 Gas pip ing m u st b e installed in accordan ce w ith n ation al an d local cod es. Refer to curren t ed ition o f N FG C in th e U.S . an d the CAN/CSA- - B149.1- - 05 in Ca nada . T abl e 6 – M aximum Capaci ty of Pipe * NOMI NAL IRON PIPE SIZE (IN. ) INTERN AL DIAMETER (IN. ) LENGTH OF PIPE (F T) 10 20 30 40 50 1/2 0.622 175 120 97 82 73 3/[...]

21 115-VOLT FIELD- SUPPLIED FUSED DISCONNECT JUNCTION BOX CONTROL BOX 24-VOLT TERMINAL BLOCK THREE-WIRE HEATING- ONLY FIVE WIRE NOTE 2 NOTE 1 1-STAGE THERMOSTAT TERMINALS FIELD-SUPPLIED FUSED DISCONNECT CONDENSING UNIT FURNACE COM R WC Y R G GND GND FIELD 24-VOLT WIRING FIELD 115-, 208/230-, 460-VOLT WIRING FACTORY 24-VOLT WIRING FACTORY 115-VOLT W[...]

22 T a ble 7 – Electrica l Da ta V O L T S --- H E R T Z --- PHASE OPERATING VOL TAGE RANGE MAX UNI T AMPS FURNACE SIZE UNI T AMP ACITY# MAXIMUM WIRE LENGTH (ft)‡ MAXIMUM FUSE OR CKT B KR AMPS† MIN IMUM WIRE GAUGE MAX* MIN. * 1 1 5 --- 6 0 --- 1 127 104 5.3 045 - - - 08/024045 7.42 49 15 14 1 1 5 --- 6 0 --- 1 127 104 7.1 045 - - - 12/036045 [...]

23 6. Reins t al l cove r to J - - Box. Do not pinc h wir es be twee n cove r and brac ket. Electrica l B ox o n F urn a ce Ca sing S ide. S ee F ig. 26. FIRE OR ELECTRI CAL SHOCK HAZARD Fai l ure to fol low t his wa rning c ould r e sul t in pe r sona l inj ury , de at h, or pr oper ty dam age . If f i el d- - s uppli ed ma nual di s conne c t swi[...]

24 See notes 2, 5, 8, 10, 11 and 12 on the page following these figures A03179 Fig. 27 - - T wo- - Stage Furnac e with T wo- - Spee d Air Condit ione r See notes 1, 2, 4, 6, 7, 9, 10, 11, and 15 on the page following these figures A03180 Fig. 28 - - T wo- - Stage Fur nace wi t h Single- - Spee d Heat Pump (Dual Fue l) See notes 1, 2, 3, 4, 6, 8, 9,[...]

25 7 See notes 1, 2, 3, 4, 12, 13, 14, 15, and 17 on the page following these figures A03182 Fig. 31 - - Dual Fue l Ther mos tat wi t h T wo - - Stage Fur nace and T wo- - Speed H eat Pump See notes 2, 11, and 12 on the page follo wing these figures A03183 Fig. 32 - - T wo- - Stage Ther mostat w it h T wo - - Stage Fur nace and T wo- - Spee d Ai r [...]

26 ACCESSORIES 1. Electro ni c Air Cl eaner (E AC ) Co n nect an accesso ry E lectro n ic Air C leaner (if u sed ) usin g 1 /4 - - in female quick co n nect termin als to th e two ma le 1/ 4- - in quic k- - conne ct t er mi nal s on the c ontr ol boar d mark ed EA C - - 1 an d EA C - - 2. Th e termi nals are rated for 115V AC, 1.0 amps ma ximum and[...]

27 CARBON MONOXIDE POI SONING HAZARD Fai l ure to fol low t his wa rning c ould r e sul t in pe r sona l inj ury or de at h. Failu re to follo w the steps ou tlined belo w fo r each app lian ce c o nn ected to the ven tin g system being p laced into oper ati on coul d re s ult in ca rbon monoxi de poisoni ng or death . Th e follow ing step s shall [...]

28 CHIMNEY INSPECTION CHART F or additional requirements refer to the National Fuel Gas Code NFP A 54/ANSI Z223.1 and ANSI/NFP A 211 Chimneys , Fireplaces, V ents, and Solid Fuel Burning Appliances in the U .S.A. or to the Canadian installation Code CSA-B149.1 in Canada. Consult P ar t C of chimney adapter v enting instructions for application suit[...]

29 Th e Chim n ey Ad apter Kit is a listed alternative v en ting sy stem for th ese fu rnaces. S ee the k it in stru ction s fo r com plete d etails. Canada (and U. S.A. ) - - Th is furnace is permitted to b e vented in to a clay tile- - lin ed maso nry ch imn ey th at is e xpose d to the outdoor s bel ow the r oof li ne, pr ovide d: 1. V e nt c on[...]

30 ca using c onde nsa t ion a nd cor rosi on in the f urnac e and/ or ven tin g system. Deratin g is permitted o n ly for altitud es above 2000 ft 3. Adjus t the a ir te mpe ra tur e ris e to the midpoi nt of the ri se ra nge or sl i ghtl y above. Low ai r te mpe ra ture r is e ca n ca use low ve nt gas t e mper atur e a nd potent i al f or c onde[...]

31 SEE NO TES: 1,2,4,5,7,8,9 on the page follo wing these figures A03211 Fig. 39 - - Downfl ow Appl ic ati on- - V ent El bow Up SEE NO TES: 1,2,4,5,6,7,8,9,10 on the page follo wing these figures A03207 Fig. 40 - - Downf low Appli cat ion - - V e nt Elbow Lef t then Up SEE NO TES:1,2,3,4,5,7,8,9 on the page follo wing these figures. A03212 Fig. 41[...]

32 SEE NO TES: 1,2,4,7,8,9 on the page follo wing these figures A03218 Fig. 44 - - Hor iz ontal Ri ght Appl ic ati on - - V e nt El bow Right SEE NO TES: 1,2,4,5,7,8,9 on the page follo wing these figures A03215 Fig. 45 - - Hori zontal Le ft Appl icat ion - - V e nt Elbow Up SEE NO TES: 1,2,4,5,7,8,9 on the page follo wing these figures A03216 Fig.[...]

33 Ca utio n !! Fo r th e follo win g a p plica tion s, u se the m inim um v ertica l heig h ts as sp ecified b elo w . Fo r all o ther a p plica tion s, fo llow ex clusiv ely th e Na tio na l Fu el Ga s C od e FURNACE ORIE NT ATION VE NT OR I ENTA - TION FURNACE I N- PUT(BTU H/HR) MIN IMUM VENT DIAM ETER (IN .)* MIN IMUM VERTICAL VE NT HEIGHT ( FT[...]

34 A04128 Fig. 50 - - Rounded End of Knoc kout  A04129 Fig. 51 - - Knoc kout Pull ed Loos e A04130 Fig. 52 - - Hamme r and Scr ewdr ive r Us ed for Knoc kout A04131 Fig. 53 - - Rem ove Knoc kout wit h Hammer BURN HAZARD Failu re to follow th is cautio n may cau se person al inju ry. Ho t v ent p ipe is w ithin reach o f small child ren wh en ins[...]

35 In Canada: Pe r se c ti on 8.24.2 of the CAN /CSA- - B149.1- - 05, any listed m ech anical v en ter may be used , w h en app ro ved b y th e aut hor it y havi ng j uri sdi c ti on. Sel e ct t he l i st ed m ec hani cal ve nte r to mat c h the Bt uh input of t he furn ace being v ented . Fo llow all manu facturers in stallatio n requ iremen ts[...]

36 T able 10 – 2 - - Stage Fur nac e Set up Switc h Desc ript ion SETU P SWITC H NO . SWITC H NAM E NOR MA L POSITION DESCRI PTI ON OF USE S W --- 1 Adaptive Heat Mode OF F Whe n OFF , a llows 2 - - - sta ge op eration with a sin gle stag e thermosta t. T urn O N wh en using 2 stage th ermostat to allow Low Hea t opera - - - tio n when R to W/W1 [...]

37 a. Tur n gas val ve ON/ OFF s witc h to OFF . b. Remove ma nif old pre ss ure t a p plug f rom ga s val ve. c. C on n ect a water co lum n man o meter o r similar dev ice to ma nif old pre s sur e ta p. d. Tur n gas val ve ON/ OFF swi tc h to ON. e. Move se tup s witc h LHT (SW- - 1) on fur nac e c ontr ol t o ON po sitio n to lo ck furn ace in [...]

38 T a ble 1 2 – Ga s R ate (cu ft/hr) SECONDS FOR 1 REVOL UTION SIZE OF TE ST DIAL SECONDS FOR 1 REVOL UTION SIZE OF TE ST DIAL 1 C U F T 2 C U F T 5 C U F T 1 C U F T 2 C U F T 5 C U F T 10 360 720 1800 50 72 144 360 11 327 655 1636 51 71 141 355 12 300 600 1500 52 69 138 346 13 277 555 1385 53 68 136 340 14 257 514 1286 54 67 133 333 15 240 48[...]

39 If cloc ked ra te doe s not ma tch r e quir e d input fr om Ste p 1, inc r ea s e mani fold pre ss ure to i nc re a se i nput or de cre a se manif old pre ssur e to dec rea se input . Re pea t st eps b thr ough e unt il cor re c t high hea t input is a c hie ve d. Re- - ins ta ll hi gh - - hea t regul ator s e al ca p on gas va lve. 8. Set h igh[...]

40 T able 14 – 2 - - Stage Fur nac e Blowe r OFF delay Set up Switc h DESIRE D HE ATING MODE BL OWER OFF D ELA Y (SEC. ) SETUP SWI TCH S W --- 2 SETUP SWI TCH S W --- 3 90 OFF OF F 120 OFF ON 150 ON OFF 180 ON ON R Y W G 10 TURNS THERMOSTAT SUBBASE TERMINALS WITH THERMOSTAT REMOVED (ANITICIPATOR, CLOCK, ETC., MUST BE OUT OF CIRCUIT.) HOOK-AROUND [...]

41 Step 5 — Ch ecklis t 1. Put aw ay t ools and ins tr u me nts . Cl ean up de br is . 2. V er if y tha t swit c hes f or LHT and OFF - - DELA Y ar e blo w er OF F - - DE LA Y are selected as desired . 3. V erify that bl ow er and b u rner access doors ar e pr oper ly installed . 4. Cy cle test furn ace w ith ro o m th ermo stat. 5. Ch eck op era[...]

42 T able 15 – Orif i ce Si ze and Mani fol d Pre ssur e for Gas I nput Rate (T abulate d Dat a Base d on 22,000 Bt uh High- - Heat / 14,500 Bt uh for Low- - He at pe r Bur ner , Der ate d 4% for Each 1000 Ft Above Se a Leve l) AL TI TUDE RAN GE (F T) AVG. GAS HEA T VAL UE (BTU H/C U FT) SPECI FIC GRA VITY OF NA TURAL GAS 0.58 0.60 0.62 0.64 Orif[...]

43 T able 15 - - Orif ic e Size and Manif old Pr ess ure f or Gas I nput Rate ( cont .) (T abulate d Dat a Base d on 22,000 Bt uh High- - Heat / 14,500 Bt uh for Low- - Heat pe r Bur ner , De r ate d 4% f or Eac h 1000 Ft A bove Se a Leve l) AL TI TUDE RAN GE (F T) AVG. GAS HEA T VAL UE AT AL TITUDE (BTU H/C U FT) SPECI FIC GRA VITY OF NA TURAL GAS[...]

44 T able 16 – Orif i ce Si ze and Mani fol d Pre ssur e for Gas I nput Rate (T abulate d Dat a Base d on 21,000 Bt uh High- - Heat / 14,500 Bt uh for Low- - He at Pe r Bur ner , Der ate d 4% for Each 1000 Ft Above Se a level) AL TI TUDE RAN GE (F T) AVG. GAS HEA T VAL UE (BTU H/C U F T) SPECI FIC GRA VITY OF NA TURAL GAS 0.58 0. 60 0.62 0. 64 Or[...]

45 T able 16 - - Orif ic e Size and Manif old Pr ess ure f or Gas I nput Rate ( cont .) (T abulate d Dat a Base d on 21,000 Bt uh High- - Heat /14,500 Bt uh for Low- - Heat Per Bur ner , Derat e d 4% f or Eac h 1000 Ft Above Sea lev el) AL TI TUDE RAN GE (F T) AVG. GAS HEA T VAL UE AT AL TITUDE (BTU H/C U F T) SPECI FIC GRA VITY OF NA TURAL GAS 0.5[...]

46 UNIT OPERA TI ON HAZARD Failu re to follow th is cau tion m ay result in im pro p er unit oper ati on or fai lure of uni t com ponent s . Labe l all wi r es pr ior to disc onne ct ion whe n se rvic ing cont r ols . W ir ing e rr ors c a n ca us e i mpr oper and dange rous oper ati on. CAUTION ! Ste p 1 — Introducti on GENERAL Th ese in structi[...]

47 CUT HAZARD Failu re to follow th is cautio n may resu lt in person al inju ry . Sh eet metal p arts may hav e sharp edg es or b u rrs. Use care and w ea r appropr iat e pr ote ct ive c l othi ng, sa f et y gla sse s a nd glo v es when h and lin g parts and serv icin g furn aces. CAUTION ! Th e min imu m m ainten an ce on t his fu rn ace is as fo[...]

48 A07125 Fig. 58 - - W i ri ng Diagr am 312A[...]

49 CLEANING AND/ OR REPLACING AI R FIL TER Th e air filter arrangem ent will vary d epen din g o n the app lication . NOTE : If t he filter h as an airflo w d irectio n arro w, the arrow mus t point t owa rds t he bl ower . CUT HAZARD Failu re to follow th is cautio n may resu lt in person al inju ry . Sh eet metal p arts may hav e sharp edg es or [...]

50 16 . R einstall con tro l bo x assemb ly in furn ace. UNIT DAMAGE HAZARD Failu re to follow th is cautio n may resu lt in sh orten ed h eat exch an ger life. He at ing f a n spe ed(s ) MUST be adj uste d t o provi de proper air temp eratu re rise as specified on th e ratin g plate. Rec ommende d opera tion is a t the midpoi nt of the ri se r ang[...]

51 a. Rem ov e m etal screw fittin g fro m wire b rush to allo w insertio n in to cable. b. Insert the twisted wi re end o f brush into en d o f sprin g ca ble, a nd cr imp ti ght wi th c ri mpi ng tool or c ri mp by st r iki ng wit h ba ll- - peen ha mmer . TIGHTNESS IS VE R Y IMPOR T ANT . NOTE : Th e materials need ed in item 9 can usually b e p[...]

52 con tro l CP U, tran sform er TR AN , in d ucer m o tor IDM , blo w er motor B L WM, hot- - surf ace i gnit er HSI, a nd gas va lve GV . 1. T wo- - Stage He ati ng (Adapt ive mode ) with Singl e- - Stage The rm ost at (Se e Fig. 24 or 33 for the rmost at conne cti ons) NOTE : T h e low - - heat o n ly switch (LH T) selects eith er the low- - hea[...]

53 low - - h eat and hig h - - h eat pressure switch co n tacts LPS an d HP S ar e open, and st ar ts the i nduce r motor ID M in high - - spe ed. The s tar t up a nd shut down f uncti ons a nd dela ys desc ribe d i n it e m 1. above a ppl y to the 2- - sta ge heat ing mode as we ll , exc e pt for swit c hing f rom l ow- - to high- - Hea t a nd vic[...]

54 b. Hig h co olin g - - When th e R - - to - - G - - an d - - Y /Y2 circu it is cl os ed a nd t her e is a dema nd for de humidi fic a ti on,t he furn ace blo w er mo tor B L WM w ill dro p the b low er speed fr om COOL to HI HEA T for a ma ximum of 1 0 minutes befo re reverting b ack to C OO L sp eed . If there is still a dem and f or dehumi dif[...]

55 Is LED status light on? Is LED status light blinking rapidly without a pause? Is LED status light blinking ON/OFF slowly with a combination of short and long flashes? Determine status code. The status code is a 2 digit number with the first digit determined by the number of short flashes and the second digit by the number of long flashes? Go to [...]

56 11 NO PREVIOUS CODE – Stored codes are erased after 72 hours. On RED LED boards stored status codes can also be erased whenev er power (115V or 24V) is interrupted. Run system through a low-heat, high-heat, or cooling cycle to check system. 12 BLOWER ON AFTER POWER UP – (115V OR 24V) – Normal operation. Blower runs for the selected b lower[...]

57[...]

58 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. E 2007 Bryant Heatin g & Cooling Sys tems 7310 W . Morris St . Indianapolis , IN 46231 Printed in U .S. A . Editi on Da te: 02 / 07 Replaces : II 312A - - - 45 - - - 7 Catal og N o. II312 A --- 4 [...]