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Manual Bryant 548D

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  • Bryant 548D - page 1

    Cancels : II 548D-90 -1 II 548D-90 -2 10/15/00 CONTENTS Pa g e SAFETY CONSIDERA TIONS . . . . . . . . . . . . . . . . . . . . . . . . . 1 INST ALLA TION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27 I. Step 1— Pr o vide Unit Su pport . . . . . . . . . . . . . . . . . 1 II. Step 2 — Fie ld Fa bricate Duc two rk . . . . ...

  • Bryant 548D - page 2

    — 2 — Fig. 1 — Roof Curb Details PLACE UNIT AS CLOSE TO THIS END OF CURB AS POSSIBLE ROOF CURB A CCESSOR Y “A” UNIT SIZE 548D CRRFCURB003A00 1 ′ -2 ″ [356] 090-150 CRRFCURB004A00 2 ′ -0 ″ [610] 6. Ser vice clearance 4 f t on ea ch side. 7. Directi on of ai rflow . 8. Conn ector package s CRBTM PWR00 1A00 and 002A00 a re for thru-t ...

  • Bryant 548D - page 3

    — 3 — II. STEP 2 — FIELD F ABRICA TE DUCTWO RK On vertica l discharge un its, secure a ll duct s to roo f curb an d building struct ure. Do not connect ductwor k to un it. F or hori- zontal applicati ons , field-supplied flanges shou ld be a ttach ed to horizon tal discharge ope nings and all ductwork atta ched to the flanges. Insulate and we ...

  • Bryant 548D - page 4

    — 4 — NO TES: 1. Dimension in ( ) is in millimeters . 2. Hook rigging shackles through holes in base rail, as sho wn in detail ‘ ‘ A. ’’ Holes in base rails are centered around t he unit center of gr av- ity . Use wooden t op skid when r igging to prev ent rigging straps from damaging unit. 3. Unit weights do not include economizer . Se ...

  • Bryant 548D - page 5

    — 5 — UNIT 548D STD UNIT WEIGHT DURABLADE EC ONOM IZ ER WEIGHT ECONOMI$ER WEIGHT CORNER WEIGHT (A) CORNER WEIGHT (B) CORNER WEIGHT (C) COR NER WEIGHT (D) “H” “J” “K” Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg Ft-i n. mm Ft-in. mm Ft-in. mm 090 940 426 44 20 62 28 207 94 178 8 1 254 115 301 136 2- 0 7 / 8 632 3- 5 5 / 16 1050 2-9 11 / ...

  • Bryant 548D - page 6

    — 6 — T able 1 — P hysic al Data LEGEN D *Indoor coil fin mater ial/outd oor coil f in mate rial . †Weight of 14-in . roof curb. **Requir es an accesso r y or optional controls upgrade kit. NO TE: The 548D units hav e a loss-of-charge switch located in the liquid line av ail- ab le a s an op tion or an ac ces sory . (Stan dard o n 120 unit ...

  • Bryant 548D - page 7

    — 7 — V . STEP 5 — MAKE ELECTRICAL CONNECTIONS A. Field P ower Suppl y All units e xcept 208/230-v units are fac tory-wired for th e volta ge shown on the u nit nam eplat e. If the 208/ 230- v unit is to be conne cted to a 2 08-v power s upply , the trans former must be rewi red by dis connec ting t he bl ack wire from the 230-v terminal o n ...

  • Bryant 548D - page 8

    — 8 — T able 2A — Elec trical Data (Units Without El ectrical Con venience Outle t) NO TE: Legend and Notes for Electr ical Data are on page 10. UNIT 548D NOMINAL V- P H - H z IFM TYPE VO L T A G E RANGE COMPRESSOR (each) OFM FLA IFM FLA ELECTR IC HE A T* PO WER SUPPL Y DISCONNECT SIZE† Min Max RLA LRA Nominal kW** FLA MCA M OCP FLA LRA 090 ...

  • Bryant 548D - page 9

    — 9 — T able 2B — Electrical Data (Units With Elect rical Con venience Outlet) NO TE: Legend and Notes for Electr ical Data are on page 10. UNIT 548D NOMINAL V- P H - H z IFM TYPE VO L T AG E RANGE COMPRESSOR (each) OFM FLA IFM FLA ELECTR IC H EA T* PO WER SUP PL Y DISCONNECT SIZE† Min Max RLA LRA Nominal kW** FLA MC A MOCP FLA LRA 090 (7 1 ...

  • Bryant 548D - page 10

    — 10 — LEGEND AND NO TES FOR T ABLES 2A AND 2B LEGEND *Heaters are field instal led only . †Us ed to d ete rmine mi nim um dis conn ect p er NE C . **Heater capac ity (kW ) is bas ed on heater voltag e of 208 v , 24 0 v , or 48 0 v and 575 v . If power distr ibution voltage to unit varies fro m rated heate r vo ltage, heater kW will vary acco ...

  • Bryant 548D - page 11

    — 11 — B. Field Contr ol Wirin g Install an approve d access ory thermo stat as sembly a ccord- ing to installation instr uctions included with the accessory . Locate ther mostat assembly o n a solid wall in the co ndi- tione d space t o sense a verage tempera ture in ac corda nce with thermostat in stallation instructions. Route the rmostat c ...

  • Bryant 548D - page 12

    — 12 — T able 3 — Heat Antic ipator Settings *Heater capacity (kW) is based on heater voltage of 208 v , 240 v , 480 v and 575 v . If pow er distribution v oltage to unit v aries from rated heater v oltage, heater kW will v ar y accordingly . 4. On size 12 0 units , i nstall vert ical disc harge bl ock-o ff plate over d uct o penings . See Fi ...

  • Bryant 548D - page 13

    — 13 — SHIPPING SCREW SHIPPING SCREW BLOCK-OFF PLA TE Fig. 12 — O utdoor-Air Ho od Details Fig. 13 — V er tical Disch arge Bloc k-Off Plate (Size 120 On ly) Fig. 14 — Durab lade Economizer Instal lation Fig. 15 — Hori zo nta l Dis charg e D ura blad e Economizer Ins tallation Fig. 16 — H orizontal D ischa rge Bloc k-Off Plate ...

  • Bryant 548D - page 14

    — 14 — 4 3 2 1 0 5 6 7 8 9 UNIT TOP OA T (TERMINALS ARE UP) OUTSIDE AIR SCREEN MINIMUM POSITION OPEN 3 1 T P P1 T1 4 2 5 S S O D C TR B RE V . B 1 9 8 8 1 8 A % H U M I D I T Y 90 70 60 30 10 D C B A 60 65 70 75 55 50 85 80 DAMPER DAMPER CLOSED OPEN OUTDOOR TEMP . ° F R E V . 97 -3 67 2 CW – SETPOINTS – CCW CONT A CTS SHO WN IN HIGH ENTHAL ...

  • Bryant 548D - page 15

    — 15 — C. Optional Ec onoMi$er See F ig . 22 for Eco noMi$ er com ponent locat ions . 1. T o remov e the ex isting unit fi lter ac cess p anel, r aise the panel and swing the bottom outward. The panel is now diseng aged from the trac k and can be remo ved. Remove the indoor coil access panel and discard. See Fig. 23. Controll er s hould be mou ...

  • Bryant 548D - page 16

    — 16 — 11. Install the complete hood assembly on the unit and secu re usin g th e sc rew s provi ded. NO TE: If optio nal power exhaust is being insta lled, com plete installation of po wer exhaust at this time. See Fig . 32 for wiring. 12. R emove th e indo or fan mo tor acce ss pane l. 13. Mount the su pply air tem perature sensor to the lowe ...

  • Bryant 548D - page 17

    — 17 — Fig. 30 — Ec onoMi$er Wiring OUTDOOR AIR SENSOR TEMP TEMP COM OUT PWR BROWN VIOLET WHITE RED BROWN TEMP TEMP COM OUT PWR RETURN AIR SENSOR VIOLET WHITE RED OA T COM OAH -15 V RA T COM RAH +15 V ECONOMI$ER CONTROLLER PINK TEMP TEMP VIOLET SUPPL Y AIR TEMPERA TURE SENSOR V+ 24 COM V AC SENSOR CO 2 (+) COM DA T COM REM POT COM LED COM CO ...

  • Bryant 548D - page 18

    — 18 — SUPPL Y AIR TEMPERA TURE SENSOR MOUNTING LOCA TION SUPPL Y AIR TEMPERA TURE SENSOR Fig. 33 — Supp ly Air Sensor Mounting L ocation 4-PIN CONNECTOR PLUG L1 L2 GREEN 1 1 22 33 44 GND 230 V AC 1 PHASE GREEN/ YELLOW 3 2 1 5 8 6 9 B A 7 4 L T . BLUE BLACK BROWN C1 BLUE GREEN/ YELLOW 3 2 1 5 8 6 9 B A 7 4 L T . BLUE BLACK BROWN C1 BLUE F AN ...

  • Bryant 548D - page 19

    — 19 — Mechanic al Coolin g Lockout Dete rmine t he out door -air temper ature at which yo u want the me chani cal co oling ( compr essors ) to b e disab led. Lo cate the mechanical cooling lockout (MECH CLG LOCKOUT) potentiometer . T o disable this feature , turn the potentiome- ter counterclockwise (CCW) to the OFF posit i on. Otherwise, set ...

  • Bryant 548D - page 20

    — 20 — 5. Set mov able flange at neares t keywa y of pulle y hub and ti ght en s etsc rew . (Se e T a ble 1 for speed chan ge for each full turn of pulley flange ). T o align fa n and mot or pulle ys: 1. Loos en fan p ulley se tscr ews . 2. Slide fan pulley along fan shaft. 3. Ma ke angul ar align ment by loosen ing moto r from mounting pl ate. ...

  • Bryant 548D - page 21

    — 21 — Ta b l e 6 — indoor -Fan Motor P erformance LEGEND BHP — Brake Horsepow er *Extensive motor and electrical testing on these units ensures that the full horsepower range of the motors can be utilized with confidence. Using f an motors up to the horsepower rat ings shown in this tab le will not result in nuisance t ripping or premat ur ...

  • Bryant 548D - page 22

    — 22 — Ta b l e 8 — Fan P erfor mance 548 D090 — V ertical Discha rge Units LEGEND NO TES: 1. Boldface indicates field-supplied dr ive is required. (See Note 7.) 2. indicates alternate drive is required. 3. indicates field-supplied motor and drive are required. 4. Maximum us able w atts input is 2120 an d maximum continuous bhp is 2.40. Ext ...

  • Bryant 548D - page 23

    — 23 — Table 9 — Fan Perf ormance 548D102 — Vert ical D ischarge U nits LEG END NO TES: 1. Boldface indicates field-supplied dr ive is required. (See Note 6.) 2. indicates field-supplied motor and drive are required. 3. Maximum us able w atts input is 2120 an d maximum continuous bhp is 2.40. Extensiv e motor and electrical testing on these ...

  • Bryant 548D - page 24

    — 24 — Table 1 0 — Fan Performa nce 548D120 — Vertical Discharge Units LEG END NO TES: 1. Boldface indicates field-supplied or alter nate (as appropr iate) drive is required. (See Note 7.) 2. indicates alternate motor and drive are required. 3. indicates field-supplied motor and drive are required. 4. Maximum usable watts input is 2120 with ...

  • Bryant 548D - page 25

    — 25 — Tabl e 11 — Fan Performan ce 548D090 — Horizontal Discharge Units LEGEND NO TES: 1. Boldface indicates field-supplied dr ive is required. (See Note 7.) 2. indicates alternate drive is required. 3. indicates field-supplied motor and drive are required. 4. Maximum us able w atts input is 2120 an d maximum continuous bhp is 2.40. Extens ...

  • Bryant 548D - page 26

    — 26 — Ta b l e 1 2 — Fan P erform ance 548D10 2 — Hor izo ntal Disc ha rge Unit s LEG END NO TES: 1. Boldface indicates field-supplied dr ive is required. (See Note 6.) 2. indicates field-supplied motor and drive are required. 3. Maximum us able w atts input is 2120 an d maximum continuous bhp is 2.40. Extensiv e motor and electrical testi ...

  • Bryant 548D - page 27

    — 27 — Ta b l e 1 3 — Fan P erforma nce 548D 120 — Hor izon tal Disc ha r ge Unit s LEG END NO TES: 1. Boldface indicates field-supplied or alter nate (as appropr iate) drive is required. (See Note 7.) 2. indicates alternate motor and drive are required. 3. indicates field-supplied motor and drive are required. 4. Maximum usable watts input ...

  • Bryant 548D - page 28

    — 28 — PRE-ST ART -UP Procee d as follows to in spect and pr epare the unit for initial start -up : 1. Remo ve all access panels . 2. Read an d follow in struction s on all W A RNING , CA U- TION , and IN FORMA TION la bels at tached t o or shipped with unit. 3. Ma k e the fol lowin g insp ections : a. Inspect for shipping and handl ing damages ...

  • Bryant 548D - page 29

    — 29 — NO TE: Whe n the compresso r is rotating in the wrong direc- tion, t he unit makes a n elev ated le vel of noise a nd do es not provid e he atin g/ cool ing. IX. ADJUST GAS INPUT The gas input to the unit is determin ed by measuring the gas fl ow at t he meter or by me asu ring the manif old pr essu re . Manifol d pressure sho uld be 3.5 ...

  • Bryant 548D - page 30

    — 30 — D . Cooling, Units With Eco noMi$er When the Outdoo r Air T emperat ure (OAT) is above t he ECON SP set point and the r oom thermostat calls for Stage 1 cooling (R to G + Y1), the indoor -fan motor (IFM) is energiz ed a nd the EconoMi $er d amper modula tes t o mini - mum position . The compres sor contactor and OFC are ene r- gized star ...

  • Bryant 548D - page 31

    — 31 — B. Outdoor Coils Inspec t coils monthly . Clean conden ser coi ls annuall y , and as requir ed by loca tion and outdoo r -air condi tions. Clean 2-row coils as follo ws: 1. Turn off unit power and tag disconnect. 2. Remove top panel screws on outdoor end of unit. 3. Remov e outdoor c oil corne r post. See Fig . 39. T o hold top panel ope ...

  • Bryant 548D - page 32

    — 32 — III. OUTDOOR F AN ADJUSTMENT (Fig. 42) 1. Shut off unit power supply . 2. Remo ve outdoo r -fa n assembl y (grill e, motor , motor cover , and fan) and loosen fa n hub setsc rews . 3. A dju st fa n he ight as sh own i n Fig. 42 . 4. Tig hten se tscrew s an d replac e outdo or -fan a ssemb ly . IV . ECONOMIZER ADJUSTMENT Refer to Opt iona ...

  • Bryant 548D - page 33

    — 33 — Fig. 44 — Cooling Char ging Chart; 548D102 Fig. 45 — C ooling Char ging Chart; 548D120 ...

  • Bryant 548D - page 34

    — 34 — TR OUBLESHOO TING Refer to T ables 14 -16 and Fi g . 46 for tr oublesh ooting i nformatio n. Ta b l e 1 4 — Heating and Cooling T roub leshootin g PROBLE M CA USE REME D Y Com pres sor a nd outdoor fan will n ot sta rt. P ow er failure . Call power company . Fuse blo wn or circuit breaker tripped. Replace fuse or reset circuit break er ...

  • Bryant 548D - page 35

    — 35 — T able 15 — Durabla de Economizer T roubles hooting LEGEND PR OBLEM CA USE REMED Y Damper does not open . Indoor f an is off . 1. Check t o ensure that 24 v ac is present at terminal C1 on the IFC or that 24 vac is present at the IFO ter minal. Check whether 24 vac is present at PL6-1 (red wire) and/or PL6-3 (black wire). If 24 vac is ...

  • Bryant 548D - page 36

    — 36 — Table 16 — EconoMi$er Troubleshooting LEGEND PROBLEM CA USE RE MED Y Damper does not open. Indoor F an is Off. Check to ensure that 24 vac i s present at T e rminal C1 (Common Po wer) on the IFC (Indoor Fan contactor) or that 24 vac is present at the IFO (Indoor F an On) ter minal. Check whether 24 v ac is present at PL (Plug) 6-1 (red ...

  • Bryant 548D - page 37

    — 37 — Fig. 46 — T ypical Wiring Dia gram ...

  • Bryant 548D - page 38

    Copyright 20 00 Br yant Hea ting & C ooling Systems CA T ALOG NO . 5354- 805 Fig. 46 — T ypical Wiring Dia gram (con t) NO TES: 1. If any of the or igina l wire f ur nished must be replace d, it mus t be repla ced wit h ty pe 90 ° C wire or its equivalent . 2. T hree-pha se motor s are prote cted under pr imar y single-pha sing condit ions. ...

  • Bryant 548D - page 39

    ...

  • Bryant 548D - page 40

    Copyright 20 00 Br yant Hea ting & C ooling Systems CL-1 CA T ALOG NO. 5354-805 CUT ALONG DOT TED LINE CUT ALONG DO TTED LINE ST ART -UP CHECKLIST (Remo ve and Sto re in Job File) I. PRELIMINAR Y INFORMA TION MODEL NO.: _ _____ ____ ___ ____ ____ _______ _____ ____ __ DATE: _____ _______ ____ _____ ______ _____ ____ _______ __ UNIT NO .: ______ ...

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5. FAQ - Frequently Asked Questions
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