Bryantメーカー551aの使用説明書/サービス説明書
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Cancels : II 551A-1 55-2 II 551 A-155-3 3/1/ 01 CONTENTS Page SAFETY CONSIDERA TIONS . . . . . . . . . . . . . . . . . . . . . . . . . 1 INST ALLA TION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17 I. Step 1 — Pr o vide Unit Support .
— 2 — Fig. 1 — Roof Curb Details PKG. NO. REF . CURB HEIGHT DESCRIPTION CRRFCURB010A00 1 ′ -2 ″ (305) Standa rd Cur b 14 ″ High CRRFCURB011A00 2 ′ -0 ″ (610) Standa rd Cur b f or Units.
— 3 — NO TE: F or preassembled horizontal adapter roof curb par t no. CRRFCURB013A00, the access ory kit includes a factory-designed, high-static, regain transition duct. F or hor izont al curb par t no. CRRFCURB012A00, a field-supplied transition duct is required.
— 4 — UNIT 551A STD U NIT WEIGHT ECONOMI$ ER WEIGHT CORNER A CORNER B CORN ER C CORNER D DIM A DIM B DIM C Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg ft-in. mm ft-i n. mm ft-in. mm 155 1575 714 80 36.3 407 185 375 170 383 174 410 186 3-5 1039 3-5 1054 1-10 559 180 1650 748 80 36.
— 5 — UNIT 551A STD UNIT WEIGHT ECONOMI$ ER WEIG HT CORNER A CORNER B CORNER C CORNER D DIM A DIM B DIM C Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg ft-in. mm ft-in. mm ft-in. mm 240 1750 794 80 36.3 420 191 395 179 448 203 486 221 3- 3 988 3-5 1054 1 -8 508 Fig.
— 6 — T able 1 — P hysic al Data LEGEN D *Evaporator co il fin mate rial/c ondenser coil fin ma terial . †Weight of 14-in . roof curb . **Circui t 1 uses the l ow er po r tion of con denser coil and lower por tion o f ev a pora- tor coils, an d Circuit 2 uses the u pper por ti on of bo th coils.
— 7 — III. STEP 3 — F IELD F ABRICA TE DUCTW ORK Secur e all duct s to b uildi ng stru cture. Use fl exible duct c on- nector s between unit and ducts as required. Insulate and weatherp roof all e xternal ductw ork, join ts, and roof openings with co unte r flash ing and m asti c i n acc ord an ce wi t h appl ica- ble c odes.
— 8 — VI. STEP 6 — MAKE ELECTRICAL CONNECTIONS A. Field P ow er Suppl y Unit is factory wi red for voltage s hown on name plate. When i nstalli ng un its , provide a disconn e ct, pe r NEC (Nation al Elec trical Code) req uireme nts , of ad equate si ze (T ab le 2).
— 9 — T able 2 — Electrical Data (See Legend on page 10.) UNIT 551A NOMINAL VO LT AG E (3 Ph, 60 Hz) V O LTA G E RANGE COMPRESSOR OFM IFM PO WER EXHA UST ELECTRIC HEA T* PO WER SUPPL Y No. 1 No . 2 Min M ax RLA LRA RL A LRA Qty Hp FL A (ea) Hp FLA FLA LRA kW FLA MCA MOCP† 155 (Stand ard IFM) 208/2 30 187 2 53 20 .
— 10 — LEGE ND *Heater capacity (kW) is based on h eater volt age of 208 v , 240 v , and 480 v . Heaters are rated at 240 v , or 480 v . If pow er distribution v olt- age to unit v ar ies from rated heater voltage , heater kW will v ar y accordingly .
— 11 — C. Optiona l Non-Fused Disc onnect On units with the opti onal non-fus ed disconnect, incom ing power wil l be wired into the di sconnect swit ch. Refer to Fi g. 13 for wiring for 100 and 2 00 amp disc onnect sw itches . Units with an MOCP (maximum ov ercurrent p rotection ) under 10 0 will u se the 1 00 amp disc onnect switc h.
— 12 — T able 4 — Heat A nticipator Sett ings *Heater kW is based on heater v oltage of 208 v , 240 v , or 480 v . VIII. STEP 8 — INST ALL OUTDOOR-AIR HOOD The same type of fact ory-i n stal led hood is used on un its with 25% ai r vent ilation a nd units with an EconoM i$er .
— 13 — C. Commissi oning The E conoMi$ er sav es ener gy when it uses outdoor air to provi de fr ee cool ing instea d of m echan ical a ir co nditioni ng . The Econo Mi$er swit chover stra tegy deter mines if the out- door air is sui t ab le for f ree co olin g .
— 14 — F . Me chanica l Cooling Loc kout Dete rmine t he out door -air tem peratur e at whic h you w ant the me chani cal co oling ( compr essors ) to b e disab led. Lo cate the mechanical cooling lockout (MECH CLG LOCKOUT) potentiometer . T o disable this feature, turn the potentiome- ter counterclockwise (CCW) to the OFF posit i on.
— 15 — H. V entilation Air ( Minim um P osition Set Up) If ven til a tio n a i r is n ot r e qui re d , ski p th is s ect io n. I f ven ti la - tion ai r is requi red, per form the f ollowin g: 1. The indoor fan must be on to set the v entilat ion air .
— 16 — Install Motormast er® I Contro ls Only on e Motorma ster I contr ol is req uired per unit. The Motormaster I control must be used in conjunction wi th the Accessory 0° F Lo w Ambient Ki t (purchased separate ly). The Motormas ter I device cont rols outdoo r fan no.
— 17 — MOTORMASTER SENSOR LOCA TION HAIRPIN END Fig. 26 — Motormaster® I and Motormast er III Sensor Locatio ns Fig. 28 — T ypical P erfect Hum idity Dehumidi fication P ackage C ont rol Box Fig.
— 18 — ST ART -UP Use th e fol lowi ng info rmat ion and S tart- Up Chec klist on page CL-1 to check out unit PRIOR to start-up. I. UNIT PREP ARA TION Check that uni t has been installed in ac cordan ce with th ese instal lation ins tructi ons and all applicable codes .
— 19 — If ou tdoo r air al one c annot satis fy the co oling r equir emen ts of the co ndition ed space, an d the OAT is a bove the MECH CLG LO CKOU T set p oint, the Ec onoM i$er in tegrat es fre e cooling wi th m echanic al coo lin g. This is acco mpl ishe d b y the strat egies bel ow .
— 20 — T able 9 — F an Perf ormance — 551A155 (With Standar d Indoor F an Motor) LEG END *Standard low-medium static drive r ange is 834 to 1064 r pm. Alter nate high-static drive range is 1161 to 1426. Other rpms req uire a field- supplied drive.
— 21 — Table 10 — Fan Pe rformance — 551A15 5 (Wi th Optional Indoor Fan Motor) LEG END *Standard low-medium static drive range is 834 to 1064 rpm. Alter nate high-static drive range is 1161 to 1426. Other rpms req uire a field- supplied drive.
— 22 — Table 11 — Fan Perfor m ance — 551A180 LEG END *Standard low-medium static drive r ange is 873 to 1021 r pm. Alter nate high-static drive range is 1025 to 1200. Other rpms req uire a field- supplied drive. NO TES: 1. Maximum continuous bhp for the standard motor is 6.
— 23 — Table 12 — Fan Perform ance — 551A240 LEG END *Standard low-medium static dr iv e range is 1002 to 1151 r pm. Alternat e high-static drive range is 1193 to 1369. Other rpms req uire a field- supplied drive. NO TES: 1. Maximum continuous bhp for the standard motor is 9.
— 24 — T able 13 — Ac cessory/FIOP Sta tic Pressu re (in. wg) LEG END NO TES: 1. Heaters are rated at 240 v , and 480 v . 2. The factor y assembled horizontal adapter substantially improves f an perf orm ance. 3. The static press ure must be added to e xter nal static pressure.
— 25 — T able 14 — P erfec t Hu midi ty™ D ehum idif icat ion P ackage Stat ic Pressure Dro p (in. wg) T able 15 — F an RPM at Motor Pulley Se ttings* *Approx imate f an rpm shown. † Indicates standard drive pac kage. **Indicates alternate dr iv e package .
— 26 — SER VICE I. CLEANING Inspect unit interi or at begi nning of ea ch heating and cooli ng season and as operat ing condit ions requi re . Remove un it top panel and/or s ide panels for access to unit interior . A. Evapo rator Coil Clean as requ ired wi th a co mmercial coil c leaner .
— 27 — 3. Loosen nuts on th e two carr iage bolts i n the mo tor mounting base . 4. Using jac king bo lt under m otor ba se , raise motor to top of slide and remove be lt. Secu re motor in this position by tighteni ng the nuts on the ca rriage bolts.
— 28 — VI. CONDENSER-F AN ADJUSTMENT A. 551 A155 and 180 Units (Fig . 33) 1. Shut off unit power supply . 2. Remove acces s panel(s) closest to the fan to be adj usted . 3. Loosen fan hub set s cr e ws . 4. Adjust fan height on sh aft usin g a straighted ge plac ed acro ss the fan or ifice .
— 29 — If the CONFIG button is pressed and held for more than 30 se cond s and rel e ased , the Econo Mi$er cont roller wil l enable the enthalpy compari son strategy (with outdoor air enthalpy and return a ir ent halpy sensor s install ed). VIII.
— 30 — E. Freeze Pro tection Thermo stat (FPT) An FPT is located on the top and bottom of the evaporator coil. It detects frost build-up and turns off the compressor , allowing the coil to clear . Once the frost has melted, the com - pre sso r ca n be r eene rgi zed.
— 31 — Fig. 36 — T ypical Wiri ng Sch ematic (551 A180, 46 0v Sho wn).
— 32 — Fig. 36 — T ypical Wiring Sc hematic (55 1A180, 460 v Show n) (cont) Fig. 37 — T y pica l Com pone nt Ar rang eme nt (5 51A1 80 Sh own).
— 33 — TR OUBLESHOO TING Refer t o T ables 18-20 for troub leshooti ng deta ils . T able 18 — Coo ling Service Anal ysis LEG END TXV — T hermo static Expansion V alve PROBLE M CA U SE REME D Y Compressor and condenser fan will n ot sta rt. P ower f ailure.
Copyright 20 01 Br yant Heati ng & Coo ling System s CA T ALOG NO. 5355-10 5 T able 19 — EconoMi$e r T roubl eshootin g LEG END T able 20 — P erfect Humid ity ™ Dehumidifi cation Sub cooler .
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Copyright 20 01 Br yant Heati ng & Coo ling System s CL-1 CA T ALOG NO . 5355-105 CUT ALONG DOT TED LINE CUT ALONG DO TTED LINE ST AR T - UP CHECKLIST I.
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