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Bryant 502A manual

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Table of contents for the manual

  • Page 1

    F or m No . PD S 502A. 24.1 HORIZONT AL INDOOR SINGLE P A CKA GE COOLING UNITS Single P ac kage Coo ling Un its F eaturing: • compac t design • flexibili ty • eas y main tena nce • high qu ality and rel iability • quiet and effic ient scroll co mpressor techn olog y FEA TURES /BENEF ITS All in o ne pac kage — high coo ling efficie ncy ,[...]

  • Page 2

    2 T ABLE OF CONTENTS Pa g e F eatures/Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Model Nu mber Nome nclature . . . . . . . . . . . . . . . . . . . . . . . . . 2 ARI Capacit y Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Ph ysical Data . . . . . . . . . . . . . . . . . . . . . . . . . [...]

  • Page 3

    3 PHYSICAL D A T A LEGEND *Shipping weights include base unit plus packaging. † If components are to be split, additional refrigerant will be needed. **Use T ype L copper only . NO TE: If components are to be split, the maxim um length of refrigerant tubing to be used is 50 equivalent ft, assuming components will be installed in same horizontal p[...]

  • Page 4

    4 FIELD-INST ALLED A CCESSORIES Thermo stat and Subbase — Attract i v e wall-mo unted 24-v access or y provi des pr eci se te mperat ure c ontr ol. Auto matic and Manu al changeo ver mo dels av ailab le. A thermostat s ubbase is av ailab le that works w ith Cycle-L OC ™ circuitr y . If a saf ety device tr ips, comp ress or lo cks out and subbas[...]

  • Page 5

    5 B ASE UNI T DIMENSION S DIMENSIONS (ft-in.) UNIT 502A ABCDE 024 2-5 2-1 5 / 8 1- 5 3 / 4 1-2 1-1 036 2-4 3 / 4 2-2 1- 5 3 / 4 1-2 1-1 048 2-5 2-3 1-11 5 / 8 1-8 7 / 8 1-7 7 / 8 060 2-4 3 / 4 2-2 3 / 4 1-11 5 / 8 1-8 7 / 8 1-7 7 / 8 Unit Compone nt Locations[...]

  • Page 6

    6 SELECTION PROCEDURE (with e xample) I DETERMINE COO LING REQUIREMENTS A T DESIGN CONDITIONS. Given: Gross C ooling Capacity Required (TC) . . . . . . . . . . . . . . . . . . . . . . . . . 39,00 0 Btuh Sensib le Heat Capaci ty (SHC) . . . . . . . . . . . . 30,50 0 Btuh T emperature of Air Entering Condenser . . . . . . . . . . . 95 F T emperature [...]

  • Page 7

    7 PERFORMANCE D A T A (cont) GROSS COOLING CAP A CITIES (cont) LEGEND NO TES: 1. Perf or m ance based on nomin al conden ser airflow l isted in physical da ta table on page 3 . 2. SHC is ba sed on 80 F db te mperature of air e nteri ng the co il. Below 80 F db, subtract (corr factor x cfm) from SHC. Above 80 F db , add (co rr factor x cfm) t o SHC.[...]

  • Page 8

    8 PERFORMANCE D A T A (cont) BEL T DRIVE EV APORA T OR F AN PERFORMANCE (Spec ial Or der Only , Pricing an d or dering on related pri ce pages.) LEGEND NO TE: Pulley setting must be adjusted to limit cfm to 450 cfm/ton maximum. Unit operation bey ond that limit may result in blo w-off and condensate problems . CONDENSER F AN PERFORMANCE LEGEND kW ?[...]

  • Page 9

    9 CONTR OLS OPERA TING SEQUENCE Cooling 1. The r mosta t call s f or co oling . a. Indoor (e v aporator) f an rela y is energiz ed and starts e vap orato r f an. b . Compr essor contact or is energiz ed to star t compre ssor and conde nser fa n (up to a 5-min ute dela y on single- phase u nits). 2. When room the r mostat is satisfi ed, the e v apor[...]

  • Page 10

    10 ELECTRICAL D A T A (cont) ELECTRIC HEA TER ST A TIC PRESSURE DR O P (in. wg) NO TE: Abov e el ectric he aters are not UL or CSA listed f or use with optional hi gh-static ev apora tor-f an motor (048, 060 units only). TYPICAL WIRING SCHEMA TICS ELEC TRIC H EA TER UNIT 88EN UNIT 502A MIN CFM UNIT CFM 600 800 1000 1200 1400 1600 1800 2000 2200 005[...]

  • Page 11

    11 TYPICAL WIRING SCHEMA TICS (cont) LEGEND AHA — Adjustab le Heat Anticipator C — Contactor Compressor CAP — Capacitor CB — Circuit Breaker CC — Cooling Com pensator CDT — Compressor Discharge T hermostat COMP — Comp ressor M otor EQUIP — Equip ment FU — Fuse GND — Ground HPS — High-Pressure Switch HR — Heater Relay IFC —[...]

  • Page 12

    12 TYPICAL WIRING SCHEMA TICS (cont) LEGEND AHA — Adjustab le Heat Anticipator C — Contactor Compressor CAP — Capacitor CB — Circuit Breaker CC — Cooling Com pensator CDT — Compressor Discharge T hermostat CH — Crankcase Hea ter COMP — Comp ressor M otor EQUIP — Equip ment GND — Ground HPS — High-Pressure Switch HR — Heater [...]

  • Page 13

    13 TYPICAL WIRING SCHEMA TICS (cont) LEGEND AHA — Adjustab le Heat Anticipator BKR W/A T — Breaks wit h Amp T urns C — Contactor Compressor CC — Cooling Com pensator CLO — Comp ressor L ockou t COMP — Comp ressor M otor CT — Current T ransf ormer EQUIP — Equip ment GND — Ground HPS — High-Pressure Switch IFC — Indoor -Fan Cont[...]

  • Page 14

    14 TYPICAL PIPING AND WIRING APPLICA TION D A T A OUTDOOR-AIR TEMPERA T URE OPERA TING LIMIT S (F) Field Splitting Ins tructions — If c omp onen ts ar e s plit , ma xi- mum length of ref rigerant tubing to be us ed is 50 ft, as suming compon ents are ins talled in same hor iz ontal pl ane. Co ndenser ma y be moun ted up to 12-ft a bov e e va pora[...]

  • Page 15

    15 GUIDE S PECIFICA TIONS INDOOR P A CKA GED UNIT HV AC GUIDE SPECIFICA TIONS — SECTION 157 87 SIZE RANGE: 2 T O 5 T ONS, NOMINAL BR Y ANT MODEL NUMBER: 502A PA R T 1 — GENERAL 1.01 SYSTEM DESCRIPTION Indoor mo unted, electrically c ontrolled pac kaged horizon- tal coo ling unit uti lizing a her metic typ e scroll compre ssor . 1.02 QU ALITY AS[...]

  • Page 16

    Copyright 2001 Bryant Heating & Cooling Systems Printed in U.S . A. 1-01 Catalog No. 5250-200 SPECIFICATIONS SUBJE CT TO CHANGE WITHOUT NOTICE UNIT MUST BE INST ALLED IN ACCORDANCE WITH INSTALLATION INSTRUCTIONS GUIDE SPECIFICA TIONS (cont) 3. Co mpressor Cycle De lay: Pre ven ts compress or from restar ting f or a minimum of 5 min utes after s[...]