Product OMNIZONE™ Data 50BYN006-024 Air-Cooled Systems · 50BYN Omnizone™ Indoor Self-Contained Air-Cooled Unit Model number nomenclature A50-8289.eps. 4 *Unit size 024 is factory

Copyright 2008 Carrier Corporation Form 50BYN-3PD

The 50BYN single-package cooling units with integral air-cooled condens-ers offer:• Compact, durable, and attractive

cabinet fits any working environment• Ducted or free return with rear return

connections with vertical or horizontal front supply air discharge

• High-efficiency cooling for commercial and industrial projects

• Rear condenser inlet and discharge and belt drive condenser fan permit condenser air connections to be ducted through window or wall louver

Features/BenefitsThe Omnizone 50BYN units provide a practical and economical approach to comfort conditioning requirements for offices, factories, and other applications in existing buildings when indoor air-cooled condensers are required.Design flexibilityThe 50BYN indoor packaged units are designed to provide the flexibility re-quired in replacement, renovation, and new construction. Units are available in 6 sizes from 5 tons to 20 tons which meet the needs for cooling restaurants, retail stores, warehouses, offices, and building additions.

OMNIZONE™50BYN006-024

Air-CooledIndoor Self-Contained

Systems5 to 20 Nominal Tons

ProductData

2

The compact footprint and service from the front of the units save valu-able floor space in equipment rooms. Belt drive condensers provide adequate static to overcome ducting and louver static losses. This allows units to be po-sitioned against an existing window or wall louver, or ducted to the outside, as required. These units can be installed in the equipment room or the condi-tioned space and used for either ducted or free return applications. Convenient rear connections allow easy access for outside air connections and air side economizer. Unit supply air discharge may be vertical or horizontal front to make the best use of headroom.

Easy installation andmaintenanceThe units are completely pre-piped and wired at the factory to ensure time and money saving installation and ser-vice. Exterior access panels are easily removed to provide speedy inspection, and service work may be done from the front of the unit. Precision engi-neered parts translate to a quality built, reliable design that will operate effi-ciently, minimize service calls, and pro-vide years of reliable operation.

Designed for customersatisfactionWhere space and styling are important considerations, 50BYN units are de-signed to exceed expectations. The high quality baked enamel finish will fit any environment attractively. These packaged systems provide the user with economy and product satisfaction in cooling, heating (with accessory heating coil), dehumidification, filter-ing, and air circulation.

All units are designed to fit through most standard doors. Unit size 024 may be easily field split to simplify moving the units into existing buildings.

Special features for outstand-ing performance• High-efficiency scroll compressors

deliver quiet, reliable cooling capac-ity. Compressor motor protection is assured by quick-acting, internal sensing elements that prevent trou-ble before it starts.

• Space-saver slab type evaporator and condenser coils use advanced heat transfer technology and pro-vide peak heat transfer efficiency with large coil face area. Fins are mechanically bonded to nonfer-rous, seamless tubing for efficient leak-free operation.

• Quiet fan performance moves large volumes of indoor air. Compact housing and specially designed dis-charge air section provide superior air handling capacity.

• Convenient front access electrical control center contains all factory pre-wired control devices.

• A specially designed sloped con-densate pan prevents water from accumulating in the basepan, meet-ing the ASHRAE 62 (American Society of Heating, Refrigeration and Air Conditioning Engineers) indoor-air quality standards to pro-vide a comfortable and safe occu-pied space. As a result of this new design, the coil is easily accessed for cleaning.

• The interior of the evaporator sec-tion is lined with a heavy gage alu-minum liner, providing cleanable surfaces for optimum indoor air quality.

• The cabinets are constructed of gal-vanized steel, bonderized, and coated on all external surfaces with a baked enamel finish. The paint finish is nonchalking and is capable of withstanding ASTM (American Society for Testing and Materials) Standard No. B117 500-hour salt spray test.

• A choice of controls provides the flexibility to meet almost any appli-cation. Choose between a full line of room-mounted thermostats, or the TEMP system thermostat which provides for communicating control or interface to VVT® (variable vol-ume and temperature) systems.

• Full compressor protection is assured by several devices, including Cycle-LOC™ current-sensing lock-out relay(s), Time Guard II anti-short cycle control, and high and low- pressurestats. These devices lock out the compressor(s) under abnor-mal operating conditions to prevent compressor damage and ensure long life.

• The 50BYN units are fully warran-tied as shipped from the factory, including 1 year on all parts (com-pressor included). Additional 2 to 5 year warranty on the compressor is standard on unit sizes 006 to 016, and is available as an option on unit size 024.

• Easy to understand and operate controls provide a virtually mistake-proof control operation.

• Two-stage capacity control (unit sizes 012 to 024) provides back-up protection, additional operating effi-ciency, and energy savings.

• Unit sizes 012 to 016 have 2 com-pressors, each on independent refrigerant circuits. This provides backup protection and better part load operating efficiency.

Features/Benefits (cont)

Table of contentsPage

Features/Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3Model Number Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3ARI Capacity Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Field-Installed Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Base Unit Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8Accessory Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-17Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Typical Wiring Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-21Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Typical Piping and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Application Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-28Guide Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29,30

3

The 024 unit size uses 3 compres-sors, each on its own independent refrigerant circuit. Standard control wiring from the factory has 2 com-pressors on the first stage and one compressor on the second stage. This can be easily changed at the jobsite to put 2 compressors on the second stage or even provide 3 steps of control, for optimum part load operation.

• All motors are protected againstsingle-phasing conditions.

• Units are built in an ISO 9001:2000 (International Standards Organization) certified manufactur-ing facility, and are fully run-tested.

• Evaporator fan section on the unit size 024 is easily removable to aid in rigging unit into existing buildings. Fan discharge on all sizes (except unit size 014) can be quickly con-verted from vertical to horizontal front supply.

• Dual condensate drain locations provide a choice when installing the unit. The installer can use whichever drain best suits the particular appli-cation, saving both installation time and expense. A built-in secondary drain provides protection against a plugged primary drain or rain entering the condenser, and may eliminate the need to provide an additional drain pan at the jobsite.

ARI* capacity ratings

LEGEND

*ARI — Air Conditioning and Refrigeration Institute.†SEER applies to unit size 006 only.

NOTE: Unit is tested in accordance with ARI standard 360-2004.

UNIT50BYN

NOMINALTONS

EVAPORATORCFM

CONDENSERCFM

NET COOLING(Btuh)

TOTALkW

EER/SEER† IPLV

006 5 2,000 3,000 59,000 6.6 10.0† —008 71/2 3,000 4,500 81,000 9.1 8.9 8.3012 10 4,000 6,000 121,000 14.2 8.5 7.5014 12 4,800 7,200 137,000 16.1 8.5 7.5016 15 6,000 9,000 162,000 19.0 8.5 7.5024 20 8,000 12,000 224,000 26.3 8.5 7.5

EER — Energy Efficiency RatioIPLV — Integrated Part Load Value

SEER — Seasonal Energy Efficiency Ratio

Y

50BYN Omnizone™ Indoor Self-Contained Air-Cooled Unit

Model number nomenclature

A50-8289.eps

4

*Unit size 024 is factory wired for 2 stages of capacity control. With the addition ofa 3-stage thermostat or outdoor-air thermostat, the unit is capable of 3 stages ofcapacity control.

†Shaft center distances shown are for vertical discharge arrangement.**Shaft center distances shown are for horizontal discharge arrangement.

UNIT 50BYN 006 008 012 014 016 024NOMINAL CAPACITY (tons) 5 71/2 10 12 15 20UNIT OPERATING WEIGHT (lb) 594 765 950 1036 1190 1654COMPRESSOR Carrier Scroll

Model SR58 SR75 SR58 SR58/SR75 SR75 SR75Quantity 1 1 2 1/1 2 3Rpm 3500Oil Charge (oz) 44 50 44/44 50/44 50/50 50/50/50Steps of Control 1 1 2 2 2 2*

OPERATING CHARGE R-22 (lb) 8.2 10.1 8.2/8.4 10.4/9.3 14.25/15.75 10.8/10.8/11.0EVAPORATOR FAN Adjustable, Belt-Driven, Centrifugal

Nominal Cfm 2000 3000 4000 4800 6000 8000Cfm Range 1,500-2,500 2,250-3,750 3,000-5,000 3,750-6,000 4,500-7,500 6,000-10,000Available Static (in. wg) 1.2 1.25 2.25 2.25 2.0 2.0Fan Size (in.) 101/2 x 71/2 11 x 8 121/2 x 91/2 14 x 12 121/2 x 91/2 121/2 x 91/2Number of Fans 1 1 1 2 2 2Standard Speed Range (Rpm) 1099-1506 1005-1378 845-1066 845-1066 1045-1306 809-1072Max Allowable Rpm 1680 1500 1475 1400 1500 1333Motor Rpm 1750Vertical Belt Quantity...Type 1...A33 1...A34 1...B41 1...B45 2...A42 2...B52Horizontal Belt Quantity...Type 1...A28 1...A29 1...B39 None 2...A32 2...B40Fan Pulley (in.) 4.3 4.7 8.7 8.7 6.7 8.0Motor Pulley (in.) 2.7-3.7 2.7-3.7 4.2-5.3 4.2-5.3 4.0-5.0 3.7-4.9Nominal Hp...Frame Size 11/2...145T 2...145T 3...182T 5...184T 5...184T 71/2...213TFan Shaft Size (mm) 20 20 20 25.4 25 25Motor Shaft Size (in.) 7/8 7/8 7/8 11/8 11/8 13/8Center Distance (in.) min/max† 13.6-13.8 13.2-13.4 10.4-11.9 9.6-10.6 12.2-13.7 17.6-18.7Center Distance (in.) min/max** 6.9-7.7 6.4-7.4 N/A N/A 7-8 10.6-11.4

EVAPORATOR COIL 3/8-in. OD, Enhanced Copper Tube, Aluminum FinsQuantity Rows - Fins/in. 4...14 4...14 4...14 4...14 4...14 4...15Face Area (sq ft) 5.8 7.0 9.5 10.8 12.4 17.6

RETURN AIR FILTERS 1 in. Disposable TypeQuantity...Size 1...16 x 25

1...20 x 251...25 x 251...20 x 25

3...20 x 25 3...20 x 25 2...25 x 251...20 x 25

8...16 x 20

CONDENSER FAN Adjustable, Belt-Driven, CentrifugalNominal Cfm 3000 4500 6000 7200 9000 12,000Cfm Range 2,250-3,750 3,375-5,625 4,500-7,500 5,400-9,000 6,760-11,250 9,000-15,000Available Static (in. wg) 1.0 1.0 1.0 1.0 1.0 1.0Fan Size (in.) 11 x 11 121/2 x 121/2 11 x 11 11 x 11 121/2 x 121/2 14 x 14Number of Fans 1 1 2 2 2 2Standard Speed Range (Rpm) 997-1364 845-1066 1045-1306 1045-1306 909-1136 841-1114Max Allowable Rpm 1364 1475 1475 1475 1500 1360Motor Rpm 1750Belt Quantity...Type 1...A65 1...B68 2...A67 2...A67 2...A78 2...B85Fan Pulley (in.) 4.7 8.7 6.7 6.7 7.7 8.0Motor Pulley (in.) 2.7-3.7 4.2-5.3 4.0-5.0 4.0-5.0 4.0-5.0 3.7-4.9Nominal Hp...Frame Size 2...145T 3...182T 5...184T 5...184T 5...184T 71/2...213TFan Shaft Size (mm) 20 20 25 25 25 25Motor Shaft Size (in.) 7/8 7/8 11/8 11/8 11/8 13/8Center Distance (in.) min/max 26.7-27.4 23.1-24.2 24.7-26.2 25.0-26.2 28.9-30.5 34.5-35.9

CONDENSER COIL 3/8-in. OD, Enhanced Copper Tube, Aluminum FinsQuantity Rows...Fins/in. 4...14 4...14 5...14 5...14 5...14 5...15Face Area (sq ft) 6.4 7.7 10.5 11.8 14.2 19.4

CONTROLS 24 Volts Provided in UnitHigh Pressure Cutout (psig) 395 ± 10

Cut-in. (psig) 298 ± 20Low Pressure Cutout (psig) 27 ± 4

Cut-in. (psig) 67 ± 7Fusible Plug 203 FTime Guard II Devices 5 Minutes on Each Circuit

CONDENSATE DRAIN LINE 3/4 in. FPT PVC Connection

Physical data

5

Filters — The unit can accept 2 in. thick cleanable or dis-posable filters.Heating coils — Field-installed heating coils for hot wateror steam have convenient field piping connections on sideof unit. Coil mounts in front of cooling coil and uses unitreturn-air filter track.Thermostats — A complete line of thermostats is avail-able to meet any control requirements, including TEMPSystem thermostats for diagnostics and communicatingcapability.Low ambient damper — Refrigerant pressure operateddamper mounted on condenser air discharge modulates tocontrol head pressure. The damper permits unit to operatein cooling even in winter, when outdoor-air temperature is

low. Damper automatically restricts condenser airflow tomaintain correct condensing pressure for efficient opera-tion at temperatures down to 0° F.Winter start kit — This package provides a time delayfor the low-pressure switch.Defrost thermostat kit — This package allows the unitcompressor to turn off when frost begins to form on theevaporator coil.Discharge plenum — This kit is for use in free blowapplications for controlled free blow into the conditionedspace.

Field-installed accessories

6

Base unit dimensions 50BYN006-012

DIM50BYN006 50BYN008 50BYN012

mm ft-in. mm ft-in. mm ft-in.A 1800 5-105/8 1800 5-105/8 1780 5-10B 1040 3- 5 1231 4- 01/2 1613 5- 31/2C 690 2- 31/8 690 2- 31/8 745 2- 53/8D 765 2- 61/8 765 2- 61/8 825 2- 81/2E 355 1- 2 420 1- 41/2 608 2- 0F 170 0- 63/4 158 0- 61/4 191 0- 71/2G 320 1- 05/8 357 1- 2 402 1- 37/8H 310 1- 01/4 350 1- 13/4 372 1- 25/8J 593 1-113/8 593 1-113/8 665 2- 21/4K 554 1- 97/8 554 1- 97/8 457 1- 6L 584 1-11 584 1-11 584 1-11M 23 0- 07/8 23 0- 07/8 23 0- 07/8N 17 0- 05/8 17 0- 05/8 17 0- 05/8P 11.5 0- 01/2 11.5 0- 01/2 11.5 0- 01/2Q 43 0- 13/4 43 0- 13/4 43 0- 13/4R 605 1-113/4 605 1-113/4 605 1-113/4S 50 0- 2 55 0- 21/8 55 0- 21/8T 360 1- 21/8 400 1- 33/4 357 1- 2V 50 0- 2 20 0- 07/8 24 0- 1W 660 2- 2 660 2- 2 660 2- 2X 535 1- 91/8 535 1- 91/8 590 1-111/4Y 190 0- 71/2 190 0- 71/2 190 0- 71/2Z 124 0- 47/8 124 0- 47/8 124 0- 47/8

AA 475 1- 63/4 475 1- 63/4 475 1- 63/4AB 140 0- 51/2 140 0- 51/2 140 0- 51/2AC 60 0- 23/8 60 0- 23/8 60 0- 23/8AD 21 0- 07/8 21 0- 07/8 21 0- 07/8AE 225 0- 87/8 225 0- 87/8 217 0- 81/2AF 155 0- 61/8 155 0- 61/8 155 0- 61/8AG 190 0- 71/2 190 0- 71/2 190 0- 71/2AH 73 0- 27/8 61 0- 23/8 59 0- 23/8AJ 895 2-111/4 1110 3- 93/4 1495 4-107/8AK 386 1- 31/4 405 1- 4 260 0-105/8AL 433 1- 5 480 1- 67/8 433 1- 5AM — — — — 275 0-107/8AN — — — — 433 1- 5AP 80 0- 31/8 80 0- 31/8 80 0- 31/8AQ 880 2-105/8 1070 3- 61/8 1455 4- 91/4AR 41 0- 15/8 41 0- 15/8 41 0- 15/8AS 533 1- 9 605 1-117/8 807 2- 73/4AT 347 1- 15/8 355 1- 2 375 1- 23/4AV 50 0- 2 50 0- 2 50 0- 2AW 231 0- 91/8 231 0- 91/8 169 0- 61/2

NOTES:1. Dimensions in [ ] are in millimeters.

2. Center of gravity.

3. Direction of airflow.

4. One side of unit must have minimum of 3 ft [914] clearance for filter removal.

CORNER WEIGHTS

CORNER50BYN006 50BYN008 50BYN012kg lb kg lb kg lb

A 65.3 144 84 185 107 236B 68.5 151 81 179 107 236C 69.4 153 89 136 108 239D 65.8 145 92 203 108 239

7

Base unit dimensions 50BYN014,016

DIM50BYN014 50BYN016

mm ft-in. mm ft-in.

A 1780 5-10 1980 6- 6

B 1804 5-11 1905 6- 3C 745 2- 53/8 745 2- 53/8D 825 2- 81/2 825 2- 81/2E 417 1- 41/2 543 1- 93/8F 246 0- 95/8 257 0-101/8G 345 1- 11/2 356 1- 2

H 321 1- 05/8 353 1- 17/8J 665 2- 21/4 665 2- 21/4K 457 1- 6 635 2- 1L 584 1-11 597 1-111/2M 23 0- 07/8 19 0- 03/4N 17 0- 05/8 17 0- 05/8P 11.5 0- 01/2 17 0- 05/8Q 43 0- 13/4 43 0- 13/4R 605 1-113/4 607 1-117/8S 55 0- 21/8 84 0- 33/8T 357 1- 2 402 1- 37/8V 24 0- 1 22 0- 07/8W 660 2- 2 765 2- 61/8X 590 1-111/4 603 1-113/4Y 190 0- 71/2 190 0- 71/2Z 124 0- 47/8 124 0- 47/8

AA 475 1- 63/4 432 1- 5

AB 140 0- 51/2 83 0- 31/4AC 60 0- 23/8 60 0- 23/8AD 21 0- 07/8 21 0- 07/8AE 217 0- 81/2 217 0- 81/2AF 155 0- 61/8 141 0- 51/2AG 190 0- 71/2 190 0- 71/2AH 59 0- 23/8 86 0- 33/8AJ 1686 5- 63/8 1737 5- 83/8AK 356 1- 2 318 1- 01/2AL 433 1- 5 483 1- 7AM 275 0-107/8 311 1- 01/4AN 433 1- 5 483 1- 7AP 80 0- 31/8 70 0- 23/4AQ 1645 5- 43/4 1765 5- 91/2AR 41 0- 15/8 41 0- 15/8AS 920 3- 01/4 979 3- 21/2AT 395 1- 31/2 385 1- 31/8AV 243 0- 91/2 276 0-107/8AW 169 0- 61/2 169 0- 61/2AX 50 0- 2 50 0- 2

CORNER WEIGHTS

CORNER50BYN014 50BYN016kg lb kg lb

A 108 238 119 263B 113 248 142 312C 127 280 152 334D 119 263 128 281





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Base unit dimensions 50BYN024

CORNER WEIGHTS

CORNER50BYN024

kg lbA 183 403B 194 428C 192 424D 181 400





DIM50BYN024

mm ft-in.A 2341 7- 81/4B 2108 6-11C 794 2- 71/4D 872 2-103/8E 581 1-107/8F 184 0- 71/4G 406 1- 4H 379 1- 3J 830 2- 85/8K 796 2- 71/4L 584 1-11M 28 0- 11/8N 40 0- 15/8P 51 0- 2Q 43 0- 13/4R 805 2- 73/4S 65 0- 21/2T 457 1- 6V 16 0- 05/8W 921 3- 01/4X 610 2- 0Y 202 0- 8Z 86 0- 33/8

AA 422 1- 45/8AB 140 0- 51/2AC 60 0- 23/8AD 21 0- 07/8AE 226 0- 87/8AF 184 0- 71/4AG 220 0- 83/4AH 62 0- 21/2AJ 1984 6- 61/8AK 345 1- 15/8AL 530 1- 87/8AM 356 1- 2AN 530 1- 87/8AP 76 0- 3AQ 1956 6- 5AR 41 0- 15/8AS 1085 3- 63/4AT 399 1- 33/4AV 314 1- 03/8AW 236 0- 91/4AX 50 0- 2AY 1471 4-10

9

Accessory dimensions

DIMENSIONAL CHART

DIM50BYN006 50BYN008 50BYN012 50BYN014 50BYN0016 50BYN024

mm ft-in. mm ft-in. mm ft-in. mm ft-in. mm ft-in. mm ft-in.A 287 0-115/16 366 1- 23/8 366 1- 23/8 366 1- 23/8 560 1-101/16 560 1-101/16B 1068 3- 711/16 1301 4- 31/4 1446 4- 815/16 1541 5- 011/16 2014 6- 65/16 2014 6- 65/16C 151 0- 515/16 189 0- 77/16 232 0- 91/8 286 0-111/4 286 0-111/4 286 0-111/4

HOT WATER COILD 242 0- 91/2 242 0- 91/2 242 0- 91/2 242 0- 91/2 242 0- 91/2 242 0- 91/2E 133 0- 51/4 133 0- 51/4 133 0- 51/4 133 0- 51/4 133 0- 51/4 133 0- 51/4F 73 0- 27/8 64 0- 21/2 83 0- 31/4 83 0- 31/4 162 0- 63/8 95 0- 33/4G 635 2- 1 597 1-111/2 597 1-111/2 597 1-111/2 584 1-11 762 2- 6

H 76 0- 3 83 0- 31/4 83 0- 31/4 83 0- 31/4 89 0- 31/2 89 0- 31/2J (return) 32 0- 11/4 38 0- 11/2 38 0- 11/2 38 0- 11/2 51 0- 2 64 0- 21/2K (supply) 32 0- 11/4 38 0- 11/2 38 0- 11/2 38 0- 11/2 51 0- 2 64 0- 21/2

L 32 0- 11/4 32 0- 11/4 32 0- 11/4 32 0- 11/4 32 0- 11/4 32 0- 11/4STEAM COIL

D 203 0- 8 203 0- 8 203 0- 8 203 0- 8 203 0- 8 203 0- 8E 64 0- 21/2 64 0- 21/2 64 0- 21/2 64 0- 21/2 64 0- 21/2 64 0- 21/2F 378 1- 27/8 362 1- 21/4 381 1- 3 381 1- 3 454 1- 57/8 454 1- 57/8G 314 1- 03/8 314 1- 03/8 314 1- 03/8 314 1- 03/8 314 1- 03/8 314 1- 03/8H 89 0- 31/2 89 0- 31/2 89 0- 31/2 89 0- 31/2 89 0- 31/2 89 0- 31/2

J (supply) 32 0- 11/4 38 0- 11/2 38 0- 11/2 38 0- 11/2 38 0- 11/2 51 0- 2K (return) 25 0- 1 25 0- 1 25 0- 1 25 0- 1 25 0- 1 38 0- 11/2

L 64 0- 21/2 64 0- 21/2 64 0- 21/2 64 0- 21/2 64 0- 21/2 64 0- 21/2

HEATING COIL

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I Determine design conditions.Given:Cooling RequirementsTotal Cooling Capacity (TC) . . . . . . . . .87,000 BtuhSensible Cooling Capacity (SHC) . . . . .70,000 BtuhEvaporator Air Quantity. . . . . . . . . . . . . 3,000 CfmSummer Entering-Air Conditions:

Entering dry bulb (edb) . . . . . . . . . . . . . . . . .82 FEntering wet bulb (ewb) . . . . . . . . . . . . . . . .67 FEntering Condenser Air Temp (EAT) . . . . . . .95 F

Unit Voltage . . . . . . . . . . . . . . . . . . . . . . . . 460 VHeating RequirementsTotal Heating Load (TC) . . . . . . . . . .200,000 BtuhWinter Entering-Air Temp (edb) . . . . . . . . . . . .50 FEntering Hot Water Temp (ewt) . . . . . . . . . . .200 FFan RequirementsExternal Static Pressure RequiredESP (in. wg) . . . . . . . . . . . . . . . . . . . . . . . . . .0.75

II Select unit based on cooling requirements.Enter Gross Cooling Capacities table for unit at3000 cfm and required wet bulb of 67 F and readdown to the section displaying capacities with 95 Fentering-air temperature. The 50BYN008 provides atotal capacity closest to design requirements.For example:Unit selection — 50BYN008

Selected at 3000 cfm of 82 F edb, 67 F ewb enter-ing air.TC = 88,800 BtuhCorrected SHC = 66,100 Btuh + (1.45 x 3000 cfm)

= 70,456 Btuh(See correction factor table, below the coolingcapacity tables.)Compressor — Power Input = 5.08 kWLeaving Air db82 F - (70,456/[1.1 x 3000 cfm]) = 60.6 F

Leaving Air wb at 67 F wb = 31.6231.62 - (88,800 Btuh/[4.5 x 3000 cfm]) = 25.06wb at 25.06 = 56.9 F

III Determine heating capacity.Enter Accessory Heating Coil Capacities table,page 14, with selected air cfm. Select the desiredwater temperature drop and read data, then correctas indicated in heating correction tables.200 F hot water selection:

TC = 211,000 Btuh selected at 3000 cfmcorrection factor at 50 F entering air is 1.08, thenTC is 227,000 Btuh — this will exceed the jobrequirements.Heating leaving air temperature

50 F + (227,000 Btuh/[1.1 x 3000 cfm]) = 118.8 FHeating gpm

227,000 Btuh/(20 F x 500) = 22.7 gpmIV Fan requirements.

External static pressure (ESP) required 0.75 in. wgStatic pressure loss through heating coil 0.08 in. wgTotal external static required 0.83 in. wgEnter Evaporator Fan Performance table for cfm, andstatic pressure required to obtain the following data:

For 3000 cfm and 0.83 ESP, by interpolation thefan operates at 1224 rpm and requires 1.34 brakehorsepower.

Since standard motor horsepower is 2.0, it will pro-duce the necessary cfm and ESP for this job.

Selection procedure (50BYN008 unit example)

11

GROSS COOLING CAPACITIES

LEGEND

Shaded area in table indicates nominal cfm values.

NOTES:1. Direct interpolation is permissible. Do not extrapolate.2. Gross capacities do not include deduction of indoor-fan motor heat.3. All capacities are based on nominal condenser airflow.4. SHC is based on 80 F db temperature of air entering the coil.

Below 80 F edb, subtract (corr factor x cfm) from SHC.Above 80 F edb, add (corr factor x cfm) to SHC.

Correction Factor = 1.10 x (1 – BF) x (edb – 80).

5. The following formulas may also be used:

tlwb = Wet-bulb temperature corresponding to enthalpy of air leaving evaporator coil (h)

Where: h = enthalpy of air entering evaporator coil.

50BYN006 (5 TON)

CondenserAir

Air Entering Evaporator — Cfm/BF1500/0.16 2000/0.30 2500/0.40

Air Entering Evaporator — Wet Bulb Temperature — Ewb (F)Cfm Temp 72 67 62 57 72 67 62 57 72 67 62 57

3000

75TC 71.2 65.4 59.9 56.1 74.9 68.7 63.3 61.7 77.3 70.9 65.9 65.7SHC 33.1 41.1 48.8 54.0 37.0 47.2 57.0 59.7 40.7 53.1 63.5 63.7kW 3.36 3.30 3.23 3.19 3.41 3.34 3.28 3.26 3.45 3.37 3.31 3.31

85TC 68.9 63.1 57.9 54.6 72.4 66.4 60.8 59.9 74.5 68.4 63.7 63.6SHC 32.2 40.1 47.9 52.5 36.1 46.3 55.8 57.9 39.7 52.1 61.6 61.5kW 3.71 3.63 3.57 3.53 3.76 3.68 3.60 3.60 3.80 3.71 3.65 3.64

95TC 66.0 60.9 55.6 52.9 69.6 63.8 58.7 58.0 71.6 65.7 61.7 61.6SHC 31.3 39.2 46.8 50.9 35.2 45.4 54.7 66.0 38.7 51.1 59.6 59.6kW 4.10 4.01 3.93 3.89 4.15 4.06 3.98 3.97 4.18 4.09 4.03 4.03

105TC 63.9 58.5 53.4 51.2 66.9 61.2 56.4 56.0 68.4 63.0 59.5 59.5SHC 30.3 38.2 45.9 49.2 34.2 44.3 53.4 54.0 37.6 50.0 57.4 57.5kW 4.51 4.42 4.33 4.30 4.57 4.47 4.39 4.38 4.59 4.52 4.45 4.45

115TC 60.9 56.0 51.2 49.4 63.6 58.3 54.0 53.9 65.2 59.7 57.1 57.1SHC 29.0 37.2 44.8 47.4 33.0 43.2 51.8 51.9 36.6 48.7 55.1 55.0kW 4.95 4.87 4.77 4.74 5.00 4.90 4.83 4.83 5.03 4.93 4.89 4.88

50BYN008 (71/2 TON)

CondenserAir



4500

75TC 99.8 91.5 83.7 80.5 104.0 95.9 88.0 88.2 107.0 98.6 93.4 93.5SHC 46.7 59.0 71.1 76.6 53.0 69.0 83.1 84.3 58.8 78.1 89.5 89.6kW 4.12 4.03 3.93 3.89 4.19 4.10 3.99 4.00 4.23 4.13 4.06 4.06

85TC 96.7 88.4 80.3 78.3 101.1 92.3 85.6 85.6 104.0 94.8 90.7 90.7SHC 45.7 57.7 69.8 74.4 51.6 67.4 81.7 81.7 57.4 76.8 86.8 86.8kW 4.63 4.50 4.39 4.35 4.69 4.57 4.47 4.47 4.73 4.61 4.55 4.55

95TC 93.1 85.1 77.8 75.9 97.1 88.8 82.9 82.9 99.0 91.1 87.6 87.8SHC 44.3 56.4 68.4 72.0 50.4 66.1 79.0 79.0 56.0 75.3 83.7 83.9kW 5.15 5.01 4.89 4.86 5.21 5.08 4.98 4.98 5.26 5.13 5.07 5.07

105TC 89.4 81.8 74.9 73.6 93.1 85.1 80.1 80.0 95.3 87.1 84.7 84.6SHC 43.0 55.1 67.1 69.7 48.9 64.8 76.2 76.1 54.6 73.8 80.8 80.7kW 5.70 5.55 5.42 5.39 5.78 5.63 5.53 5.53 5.82 5.67 5.62 5.62

115TC 85.8 78.3 71.7 71.0 88.9 81.4 77.2 77.2 91.0 83.4 81.5 81.4SHC 41.7 53.8 65.5 67.1 47.6 63.4 73.3 73.3 53.4 72.5 77.6 77.5kW 6.29 6.13 5.98 5.96 6.38 6.20 6.12 6.12 6.41 6.26 6.22 6.22

BF — Bypass FactorEwb — Entering Wet-BulbkW — Compressor Motor Power Input (kilowatts)SHC — Sensible Heat Cap. (1000 Btuh)TC — Total Cap. (1000 Btuh) Gross

BYPASSFACTOR

(BF)

ENTERING AIR DRY-BULB TEMP (F)79 78 77 76 75 under 7581 82 83 84 85 over 85

Correction Factor.05 1.045 2.09 3.14 4.18 5.23

Use formulashown below.

.10 .98 1.98 2.97 3.96 4.95

.20 .88 1.76 2.64 3.52 4.40

.30 .77 1.54 2.31 3.08 3.85

.35 .72 1.43 2.15 2.86 3.58

tldb = tedb –sensible capacity (Btuh)

1.10 x cfm

hldb = hedb –total capacity (Btuh)

4.5 x cfm

Performance data

12

GROSS COOLING CAPACITIES (cont)

LEGEND





5. The following formulas may also be used.



50BYN012 (10 TON)

CondenserAir



6000

75TC 141.8 129.3 118.1 111.2 148.9 136.2 125.2 123.0 153.6 140.7 131.4 131.4SHC 69.9 85.7 101.2 111.2 78.8 99.3 119.1 123.0 87.0 112.0 131.4 131.4kW 8.13 7.91 7.72 7.59 8.26 8.04 7.84 7.81 8.35 8.13 7.96 7.96

85TC 136.7 124.7 113.7 107.9 143.4 131.0 120.7 119.2 147.7 135.2 127.0 127.0SHC 67.9 83.7 99.1 107.9 76.7 97.2 116.8 119.2 84.9 109.8 127.0 127.0kW 8.92 8.68 8.48 8.37 9.05 8.81 8.62 8.59 9.14 8.91 8.74 8.74

95TC 131.3 119.7 109.2 104.4 137.5 125.7 116.0 115.1 141.4 129.4 122.5 122.5SHC 65.7 81.5 96.9 104.4 74.5 95.0 114.3 115.1 82.6 107.4 122.5 122.5kW 9.76 9.53 9.31 9.21 9.89 9.66 9.47 9.45 9.98 9.74 9.59 9.59

105TC 125.5 114.4 104.4 100.7 131.4 120.0 111.0 110.8 134.7 123.4 117.8 117.8SHC 63.5 79.3 94.6 100.7 72.3 92.7 111.0 110.8 80.3 105.0 117.8 117.8kW 10.66 10.41 10.19 10.11 10.80 10.56 10.36 10.35 10.88 10.63 10.52 10.52

115TC 119.6 108.9 99.5 96.7 124.7 113.9 106.1 106.1 127.7 117.2 112.7 112.7SHC 61.3 77.0 92.2 96.7 69.9 90.3 106.1 106.1 77.8 102.4 112.7 112.7kW 11.64 11.38 11.16 11.09 11.78 11.52 11.33 11.33 11.85 11.60 11.51 11.51

50BYN014 (12 TON)

CondenserAir



7200

75TC 153.8 148.0 142.5 140.1 161.4 155.0 149.8 149.2 165.7 159.5 155.3 155.3SHC 79.2 100.3 123.9 140.1 87.5 113.8 143.8 149.2 94.9 125.8 155.3 155.3kW 9.15 9.05 9.06 9.01 9.40 9.29 9.21 9.20 9.41 9.30 9.23 9.23

85TC 148.4 142.7 137.5 135.5 155.1 149.3 144.3 144.0 159.4 153.4 149.7 149.7SHC 77.0 97.9 121.5 135.5 85.2 111.3 141.1 144.0 92.4 123.1 149.7 149.7kW 10.15 10.05 9.99 9.95 10.35 10.24 10.15 10.14 10.41 10.30 10.23 10.23

95TC 142.7 137.2 132.3 130.7 148.8 143.2 138.6 138.6 152.8 147.1 143.9 143.9SHC 74.7 95.4 119.0 130.7 82.8 108.6 138.6 138.6 89.8 120.4 143.9 143.9kW 11.21 11.10 11.01 10.97 11.36 11.25 11.16 11.15 11.47 11.36 11.29 11.29

105TC 136.6 131.4 126.7 126.6 142.3 136.9 133.0 133.0 145.9 140.5 137.8 137.8SHC 72.3 92.8 116.4 125.6 80.2 105.8 133.0 133.0 87.2 117.6 137.8 137.8kW 12.32 12.20 12.07 12.04 12.44 12.32 12.24 12.23 12.59 12.48 12.40 12.40

115TC 130.2 125.2 120.8 120.1 135.4 130.4 127.0 127.0 138.6 133.6 131.5 131.5SHC 69.8 90.1 113.8 120.1 77.5 102.8 127.0 127.0 84.4 114.6 131.5 131.5kW 13.49 13.38 13.22 13.19 13.59 13.48 13.40 13.40 13.78 13.67 13.61 13.61


BYPASSFACTOR

(BF)




.10 .98 1.98 2.97 3.96 4.95

.20 .88 1.76 2.64 3.52 4.40

.30 .77 1.54 2.31 3.08 3.85

.35 .72 1.43 2.15 2.86 3.58


1.10 x cfm


4.5 x cfm

Performance data (cont)

13

GROSS COOLING CAPACITIES (cont)

LEGEND





5. The following formulas may also be used:



50BYN016 (15 TON)

CondenserAir



9000

75TC 186.2 169.6 154.4 149.0 194.0 177.4 163.8 163.4 200.0 182.6 173.2 173.0SHC 90.8 115.2 138.6 149.0 102.0 134.0 163.8 163.4 113.6 151.4 173.2 173.0kW 10.48 10.22 9.88 9.88 10.62 10.36 10.14 10.14 10.72 10.46 10.30 10.30

85TC 179.4 163.2 149.0 144.6 187.2 170.4 158.0 158.0 192.0 175.2 167.4 167.8SHC 88.6 112.4 135.8 144.6 100.2 131.2 158.0 158.0 111.6 148.8 167.4 167.8kW 11.78 11.48 11.22 11.12 11.94 11.62 11.40 11.40 12.04 11.74 11.60 11.58

95TC 172.2 157.4 143.0 140.0 179.6 163.8 153.2 153.0 184.0 168.2 161.8 162.0SHC 85.4 110.0 133.2 140.0 97.0 128.6 153.2 153.0 108.2 146.0 161.8 162.0kW 13.16 12.84 12.50 12.44 13.34 13.00 12.76 12.74 13.44 13.10 12.96 12.96

105TC 165.4 150.8 137.6 135.4 172.2 156.8 147.6 147.4 176.0 160.8 156.0 156.2SHC 83.0 107.4 130.6 135.4 94.8 125.4 147.6 147.4 105.4 143.0 156.0 156.2kW 14.62 14.26 13.90 13.84 14.82 14.42 14.20 14.20 14.92 14.56 14.42 14.42

115TC 158.2 144.2 131.8 130.6 164.0 149.8 142.0 142.2 167.6 153.4 150.0 150.0SHC 80.6 104.6 127.8 130.6 91.8 123.0 142.0 142.2 130.4 140.0 150.0 150.0kW 16.18 15.76 15.38 15.35 16.36 15.96 15.72 15.72 16.48 16.08 15.98 15.98

50BYN024 (20 TON)

CondenserAir

Air Entering Evaporator — Cfm/BF6000/0.15 8000/0.30 10,000/0.40


12,000

75TC 270.9 246.9 224.7 213.3 284.7 259.8 237.9 235.2 293.4 267.0 250.2 250.5SHC 129.6 162.0 193.8 213.3 146.1 188.1 228.6 235.2 161.7 211.8 250.2 250.5kW 15.51 15.12 14.76 14.58 15.75 15.36 15.00 14.97 15.90 15.48 15.21 15.21

85TC 261.3 237.9 217.2 207.0 274.2 250.2 229.2 228.0 282.0 257.1 242.1 242.7SHC 125.7 158.1 190.2 207.0 141.9 184.5 223.8 228.0 157.2 207.6 242.1 242.7kW 17.40 16.95 16.56 16.38 17.67 17.22 16.83 16.80 17.82 17.37 17.07 17.10

95TC 251.7 229.5 209.1 201.3 263.4 240.0 221.4 220.8 270.3 246.9 234.6 234.6SHC 122.4 154.5 186.3 201.3 138.3 180.0 219.3 220.8 152.4 204.0 234.6 234.6kW 19.41 18.93 18.48 18.30 19.71 19.20 18.78 18.75 19.86 19.35 19.08 19.08

105TC 241.5 220.2 200.4 194.4 252.3 230.1 213.3 213.3 258.9 236.4 225.9 225.9SHC 118.8 151.2 182.4 194.4 134.4 175.8 213.3 213.3 149.7 199.8 225.9 225.9kW 21.57 21.03 20.52 20.34 21.84 21.30 20.88 20.88 22.05 21.48 21.24 21.21

115TC 231.3 210.9 192.0 187.5 240.9 219.9 205.2 205.2 246.9 225.9 217.5 217.8SHC 114.3 147.0 178.8 187.5 130.5 172.5 205.5 205.2 145.2 196.2 217.5 217.8kW 23.85 23.25 22.68 22.53 24.15 23.55 23.10 23.10 24.33 23.76 23.52 23.52


BYPASSFACTOR

(BF)




.10 .98 1.98 2.97 3.96 4.95

.20 .88 1.76 2.64 3.52 4.40

.30 .77 1.54 2.31 3.08 3.85

.35 .72 1.43 2.15 2.86 3.58


1.10 x cfm


4.5 x cfm

14

ACCESSORY HEATING COIL CAPACITIES

LEGEND

*Steam distributing coil — 1 row, ratings based on 2 psig steam, 60 Fentering air.

†Hot water coil — 2 row, ratings based on 200 F entering water temper-ature, 20 F water temperature drop, 60 F entering air temperature

NOTES:1. Maximum allowable leaving air temperature 140 F.2. Maximum operating limit for heating coils is 200 psig or 400 F.3. To obtain capacities other than those given above, multiply the Btuh

value from the Accessory Heating Coil Capacities table by theproper value from the Heating Capacity Correction Factors table.

4. Formulas:Leaving Air Temperature — LAT = edb (F) + (TC Btuh/1.1 x cfm])Gpm = TC (Btuh) (500 x ΔT water [F])

5. Reduced airflow (caused by dirty filters, loose or broken fan belts,etc.) over coil during cooling cycle may result in freeze-up of nearbyheating coil. Since units normally require a low pressure switchcutout setting at about 27 F, use of a freeze-up thermostat is recom-mended if heating coil is not drained or filled with an antifreezesolution.

6. Field-supplied thermostat and control valve are required when usingaccessory heating coils.

HEATING CAPACITY CORRECTION FACTORS

UNIT50BYN CFM

STEAM DISTRIBUTING COIL* HOT WATER COIL†TC

(Btuh)LAT(F)

Air Δ P(in. wg)

TC(Btuh)

LAT(F) GPM

Water Δ P(Psig)

Air Δ P(in. wg)

0061,500 116 130 0.04 101 120 10 3.7 0.042,000 134 120 0.05 117 112 12 4.6 0.052,500 147 115 0.08 131 107 13 5.8 0.08

0082,250 97 100 0.02 172 131 17 3.5 0.043,000 118 96 0.04 211 125 21 4.6 0.083,750 132 93 0.06 239 119 24 5.5 0.12

0123,000 118 96 0.04 211 125 21 4.6 0.084,000 137 92 0.07 247 117 25 4.8 0.145,000 153 88 0.10 276 111 28 6.8 0.21

0143,600 164 99 0.04 243 120 24 5.0 0.084,800 177 92 0.06 292 114 29 6.0 0.146,000 231 91 0.08 323 107 32 7.1 0.21

0164,500 209 102 0.05 307 122 30 5.1 0.016,000 234 95 0.07 363 115 36 6.2 0.167,500 256 91 0.09 396 108 39 7.4 0.23

0246,000 209 92 0.01 410 126 41 2.4 0.058,000 246 88 0.02 500 118 50 3.5 0.08

10,000 272 85 0.03 580 114 58 3.9 0.11

LAT — Leaving Air Temperature (F)TC — Total Heating Capacity (1000 Btuh)ΔP — Pressure Drop

STEAM COIL

Steam Pressure(Psig)

Entering Air Temperature (F)40 50 60 70 80

0 1.11 1.03 0.96 0.89 0.822 1.14 1.07 1.00 0.93 0.865 1.19 1.11 1.05 0.98 0.91

10 1.25 1.18 1.11 1.04 0.97

HOT WATER COILWater

Temp (F)Drop

EnteringWater

Temp (F)

Entering Air Temperature (F)

40 50 60 70 80

10180 1.06 0.98 0.90 0.83 0.75200 1.22 1.15 1.07 1.00 0.92220 1.39 1.32 1.24 1.17 1.09

20180 0.98 0.91 0.83 0.75 0.68200 1.15 1.08 1.00 0.93 0.85220 1.32 1.25 1.17 1.10 1.02

30180 0.91 0.83 0.76 0.68 0.60200 1.08 1.00 0.93 0.85 0.78220 1.25 1.18 1.10 1.03 0.95


15

CONDENSER FAN PERFORMANCE

LEGENDBhp — Brake Horsepower

Shaded areas require field-supplied drive.

50BYNSTATIC PRESSURE (in. wg)

Cfm0.0 0.2 0.4 0.6 0.8 1.0

Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp

006

2,000 566 0.18 710 0.30 846 0.40 972 0.46 1070 0.61 1130 0.722,500 753 0.40 880 0.59 927 0.63 1020 0.79 1105 1.10 1184 1.353,000 940 0.83 985 0.90 1080 1.00 1122 1.10 1200 1.29 1320 1.463,500 1047 1.20 1140 1.47 1173 1.50 1250 1.70 1292 1.40 1360 1.594,000 1250 1.94 1257 2.00 1333 2.10 1390 2.41 1410 2.60 1470 2.76

008

3,000 547 0.30 670 0.54 751 0.60 840 0.80 920 1.10 995 1.503,750 760 0.89 824 1.10 920 1.25 964 1.30 1040 1.53 1110 2.104,500 910 1.53 940 1.70 1020 1.90 1090 2.08 1173 2.40 1240 2.595,250 1020 2.00 1095 2.40 1170 2.90 1180 3.00 1240 3.10 1300 3.536,000 1180 3.10 1195 3.20 1260 3.70 1320 4.16 1380 4.80 1440 5.60

012

4,000 665 0.40 803 0.65 920 0.97 989 1.20 1080 1.48 1163 1.905,000 830 0.82 912 1.20 1010 1.55 1088 1.70 1170 2.00 1246 2.506,000 976 1.70 1070 2.16 1131 2.30 1210 2.66 1318 2.90 1390 3.367,000 1120 2.85 1198 3.00 1273 3.20 1343 3.70 1410 4.21 1474 4.908,000 1282 3.90 1353 4.50 1420 5.06 1517 5.30 1580 5.93 1640 6.70

014

4,800 703 0.62 840 1.05 860 1.10 950 1.29 1090 1.62 1172 2.026,000 853 1.12 902 1.60 1060 2.10 1130 2.30 1210 2.66 1290 3.207,200 1045 2.40 1140 3.00 1191 3.20 1270 3.62 1290 3.79 1357 4.608,400 1190 3.60 1270 4.20 1340 4.89 1421 5.10 1490 5.85 1560 6.709,600 1380 5.70 1452 6.50 1520 7.13 1550 7.20 1611 7.50 1670 8.23

016

6,000 600 0.60 720 1.02 820 1.51 910 2.10 950 2.20 1025 2.807,500 736 1.50 833 1.86 920 2.50 1015 2.80 1040 3.08 1106 3.809,000 942 3.20 1030 3.60 1040 4.20 1110 4.50 1141 4.80 1230 5.03

10,500 1075 5.10 1150 6.25 1220 6.80 1280 6.72 1340 7.50 1400 8.5012,000 1230 7.10 1310 8.20 1350 8.96 1410 9.20 1465 9.80 1470 10.10

024

8,000 560 1.68 640 2.04 705 2.40 770 3.00 850 3.60 920 3.9810,000 710 3.36 760 3.72 820 4.20 870 4.80 930 5.40 975 6.0012,000 845 5.28 890 5.70 945 6.20 975 6.71 1025 7.26 1090 7.7014,000 960 8.14 1020 8.80 1076 9.24 1090 9.90 1125 10.50 1150 11.0016,000 1090 11.60 1150 12.50 1190 12.80 1200 13.20 1230 13.70 1250 14.00

16

EVAPORATOR FAN PERFORMANCE

LEGENDBhp — Brake Horsepower to Supply FanNOTES:1. Italics indicates field-supplied drive is required.2. Do not operate in area.



50BYN006 UNIT

Airflow(cfm)

Available External Static Pressure (in. wg)0.2 0.4 0.6 0.8 1.0 1.2 1.4

Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp1500 816 0.24 955 0.32 1096 0.41 1227 0.49 1347 0.59 1454 0.71 1546 0.861750 903 0.35 1025 0.43 1138 0.53 1260 0.63 1374 0.73 1481 0.83 1583 0.952000 987 0.48 1088 0.56 1197 0.67 1298 0.78 1405 0.90 1507 1.02 1606 1.132250 1073 0.66 1169 0.75 1261 0.84 1353 0.96 1443 1.09 1537 1.22 1631 1.362500 1161 0.87 1246 0.95 1329 1.06 1417 1.18 1497 1.31 1577 1.45 — —

50BYN008 UNIT

Airflow(cfm)


Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp2250 813 0.46 908 0.56 1010 0.67 1125 0.80 1230 0.94 1330 1.09 1420 1.242500 872 0.59 962 0.70 1046 0.81 1141 0.94 1246 1.09 1341 1.24 1433 1.402750 933 0.75 1019 0.87 1092 0.99 1171 1.12 1259 1.26 1354 1.42 1443 1.593000 993 0.94 1068 1.06 1145 1.19 1213 1.32 1287 1.47 1367 1.62 1453 1.803250 1055 1.15 1127 1.28 1199 1.42 1261 1.56 1325 1.71 1394 1.86 — —3500 1117 1.40 1182 1.55 1245 1.68 1316 1.84 1371 1.98 — — — —3750 1180 1.68 1239 1.83 1302 1.97 — — — — — — — —

50BYN012 UNIT

Airflow(cfm)


Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp3000 733 0.63 823 0.76 918 0.93 1013 1.13 1115 1.34 — — — —3250 774 0.77 856 0.90 942 1.07 1030 1.26 1120 1.49 1213 1.72 — —3500 816 0.93 891 1.07 969 1.23 1050 1.42 1132 1.64 1216 1.89 1303 2.143750 858 1.10 927 1.25 999 1.42 1073 1.60 1149 1.82 1226 2.07 1305 2.334000 901 1.30 965 1.46 1031 1.62 1100 1.81 1170 2.02 1241 2.26 1313 2.534250 944 1.52 1003 1.69 1064 1.86 1128 2.05 1193 2.26 1260 2.49 1327 2.754500 986 1.76 1042 1.94 1099 2.12 1158 2.31 1219 2.52 1281 2.75 1344 3.004750 1028 2.04 1082 2.22 1135 2.41 1191 2.60 1247 2.81 — — — —5000 1071 2.34 1122 2.52 1172 2.72 1224 2.92 — — — — — —


17

EVAPORATOR FAN PERFORMANCE (cont)




50BYN014 UNIT

Airflow(cfm)


Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp3750 680 0.79 770 0.95 840 1.11 920 1.28 990 1.46 1050 1.64 1120 1.834000 710 0.92 790 1.09 860 1.26 930 1.44 1000 1.62 1060 1.81 1130 2.014250 740 1.07 810 1.25 880 1.43 950 1.61 1020 1.81 1080 2.00 1140 2.214500 770 1.24 840 1.42 910 1.61 970 1.81 1040 2.01 1100 2.21 1160 2.424800 800 1.45 870 1.65 940 1.85 1000 2.05 1060 2.26 1120 2.48 1170 2.705250 860 1.83 920 2.04 980 2.26 1040 2.48 1100 2.70 1150 2.93 1200 3.165500 890 2.06 950 2.28 1000 2.50 1060 2.73 1110 2.96 1170 3.20 1220 3.445750 920 2.32 970 2.54 1030 2.77 1080 3.01 1140 3.25 1190 3.50 1240 3.756000 950 2.59 1000 2.82 1060 3.06 1110 3.31 1160 3.56 1210 3.81 1260 4.07

50BYN016 UNIT

Airflow(cfm)


Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp4500 883 1.06 980 1.27 1093 1.52 1202 1.80 1304 2.09 1397 2.40 1477 2.725000 951 1.37 1034 1.59 1127 1.85 1231 2.13 1328 2.44 1421 2.76 — —5500 1018 1.73 1091 1.97 1170 2.23 1258 2.52 1352 2.84 1442 3.17 — —6000 1077 2.14 1152 2.41 1220 2.67 1295 2.96 1376 3.28 1462 3.63 — —6500 1138 2.62 1214 2.91 1275 3.18 1339 3.48 1409 3.80 1484 4.15 — —7000 1204 3.15 1268 3.44 1332 3.76 1389 4.06 1450 4.39 — — — —7500 1264 3.79 1322 4.08 1390 4.41 1443 4.73 — — — — — —

50BYN024 UNIT

Airflow(cfm)


Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp6,000 705 1.18 793 1.43 887 1.74 982 2.12 1082 2.54 — — — —6,500 746 1.44 826 1.70 910 2.01 998 2.38 1086 2.81 — — — —7,000 787 1.73 860 2.02 937 2.32 1017 2.68 1099 3.10 1181 3.58 — —7,500 829 2.07 897 2.38 967 2.68 1041 3.04 1116 3.45 1193 3.91 1269 4.438,000 871 2.45 935 2.77 1000 3.09 1067 3.45 1137 3.85 1208 4.30 1280 4.808,500 914 2.89 974 3.21 1034 3.55 1097 3.90 1161 4.30 1227 4.75 1294 5.239,000 956 3.37 1013 3.69 1070 4.06 1128 4.42 1188 4.82 1249 5.25 1312 5.739,500 999 3.90 1054 4.23 1106 4.62 1161 5.00 1217 5.39 1274 5.82 1333 6.30

10,000 1043 4.49 1094 4.82 1145 5.22 1196 5.63 1248 6.03 1302 6.46 1357 6.93

18

LEGEND

*Minimum Ckt Amps and MOCP Amps values per NEC (see Note 1).†The overcurrent protective device for the unit shall be fuse or HACRcircuit breaker (see Note 1).

NOTES:1. In compliance with NEC requirements for multimotor and combina-

tion load equipment (NEC Articles 430 and 440), the overcurrentprotective device for the unit shall be fuse or HACR circuit breaker.Canadian units may be fuse or circuit breaker.

2. Wire sizing amps are a sum of 125% of the compressor RLA plus100% of indoor fan motor FLA.

3. Motors are protected against primary single phasing condition.4. Indoor-fan motors are 3-phase motors of same voltage as unit.5. Three-phase voltage imbalance must not exceed 2 percent.

50BYN UNIT V-Ph-Hz

COMPRESSOR 1 COMPRESSOR 2 COMPRESSOR 3 OUTDOORFAN MOTORINDOOR FAN

MOTOR POWER SUPPLY*

RLA LRA RLA LRA RLA LRA Hp FLA Hp FLA MCA MOCP†

006208/230-3-60 16.0 125.0 — — — — 2.0 5.8 1.5 4.4 30.2 40

460-3-60 7.2 56.5 — — — — 2.0 2.6 1.5 2.0 13.6 20575-3-60 5.8 45.2 — — — — 2.0 2.1 1.5 1.6 10.9 15

008208/230-3-60 18.9 146.0 — — — — 3.0 8.6 2.0 5.8 38.0 45

460-3-60 8.5 66.0 — — — — 3.0 3.9 2.0 2.6 17.2 25575-3-60 6.8 52.8 — — — — 3.0 3.1 2.0 2.1 13.7 20

012208/230-3-60 16.0 125.0 16.0 125.0 — — 5.0 14.2 3.0 8.6 58.8 70

460-3-60 7.2 56.5 7.2 56.5 — — 5.0 6.4 3.0 3.9 26.6 35575-3-60 5.8 45.2 5.8 45.2 — — 5.0 5.1 3.0 3.1 21.2 25

014208/230-3-60 16.0 125.0 18.9 146.0 — — 5.0 14.2 5.0 14.2 68.0 80

460-3-60 7.2 56.5 8.5 66.0 — — 5.0 6.4 5.0 6.4 30.7 40575-3-60 5.8 45.2 6.8 52.8 — — 5.0 5.1 5.0 5.1 24.5 30

016208/230-3-60 18.9 146.0 18.9 146.0 — — 5.0 14.2 5.0 14.2 70.9 80

460-3-60 8.5 66.0 8.5 66.0 — — 5.0 6.4 5.0 6.4 32.0 40575-3-60 6.8 52.8 6.8 52.8 — — 5.0 5.1 5.0 5.1 25.6 30

024208/230-3-60 18.9 146.0 18.9 146.0 18.9 146.0 7.5 20.5 7.5 20.5 102.8 110

460-3-60 8.5 66.0 8.5 66.0 8.5 66.0 7.5 9.3 7.5 9.3 46.6 50575-3-60 6.8 52.8 6.8 52.8 6.8 52.8 7.5 7.4 7.5 7.4 37.2 45

FLA — Full Load AmpsHACR — Heating, Air Conditioning and RefrigerationLRA — Locked Rotor AmpsMCA — Minimum Circuit AmpsMOCP — Maximum Overcurrent Protective Device

(see Note 1)NEC — National Electrical CodeRLA — Rated Load Amps

Electrical data

19

Typical wiring schematic, 50BYN006-008

LEGEND

C — Compressor ContactorCB — Circuit BreakerCLO — Compressor LockoutCR — Control RelayEQUIP — EquipmentGND — GroundHPS — High-Pressure SwitchIFC — Indoor-Fan ContactorIFM — Indoor-Fan MotorIFP — Indoor-Fan ProtectorLPS — Low-Pressure SwitchNEC — National Electrical CodeOFC — Outdoor-Fan ContactorOFM — Outdoor-Fan MotorOFP — Outdoor-Fan ProtectorTB — Terminal BlockTDR — Time Delay RelayTRAN — Transformer

Terminal Box Connection

Marked Terminal

Unmarked Terminal

Splice

Factory Wiring

Field Wiring

NOTES:1. Fan motors are inherently thermally protected.2. Three phase motors are protected under primary single

phase conditions.3. Use conductors suitable for at least 90 C (194 F) when replac-

ing factory wiring.4. Use copper conductors only.5. Wiring for field power supply must be rated at 75 C (167 F)

minimum.

20

Typical wiring schematic, 50BYN012-016

LEGEND



Marked Terminal

Unmarked Terminal

Splice

Factory Wiring

Field Wiring

NOTES:1. Fan motors are inherently thermally

protected.2. Three phase motors are protected under

primary single phase conditions.3. Use conductors suitable for at least 90 C

(194 F) when replacing factory wiring.4. Use copper conductors only.5. Wiring for field power supply must be rated

at 75 C (167 F) minimum.

21

Typical wiring schematic, 50BYN024

LEGEND



Marked Terminal

Unmarked Terminal

Splice

Factory Wiring

Field Wiring

NOTES:1. Fan motors are inherently thermally

protected.2. Three phase motors are protected under

primary single phase conditions.3. Use conductors suitable for at least 90 C

(194 F) when replacing factory wiring.4. Use copper conductors only.5. Wiring for field power supply must be rated

at 75 C (167 F) minimum.

22

Operating sequenceAll units require the addition of a thermostat accessorypackage to complete the control circuit. The sequence ofoperation may vary depending on which package isselected.Room-mounted thermostat — The unit uses anelectronic, communicating electronic, or mechanical ther-mostat mounted in the conditioned space.Fan circulation — When the thermostat selector switch isset to the FAN position, the evaporator-fan motor willoperate to provide air circulation.Cooling — The evaporator will operate continuously orwhen the compressor runs, depending on the setting of thethermostat fan selector switch. When the thermostat closes(on a call for cooling), the control relay outdoor-fan contac-tor and compressor contactor(s) close. The control relaywill start the indoor fan if it is not already running. Thecondenser fan contactor will start the condenser air fanand the compressor contactors will immediately start thecompressor(s). The 50BYN024 unit, as wired from thefactory, has 2 compressors on first stage and one on sec-ond stage; this may be changed (see Application Data sec-tion of this product data).

A second stage on 50BYN012 to 024 units will close ifadditional cooling demand is required, and will start thesecond-stage compressor. When the thermostat is satisfied,the second stage compressor will stop first, and then thefirst stage compressors will stop when cooling demand issatisfied. The condenser will also stop as soon as both cool-ing stages are satisfied.

Low ambient control on 50BYN units is accomplishedwith a field-installed refrigerant operated damper locatedon the condenser fan discharge. Low ambient operationdoes not affect operating sequence.

A 5-minute timer, TDR (time-delay relay), will preventthe compressor(s) from restarting for 5 minutes after anycompressor has stopped.Heating — The evaporator fan will operate continuously orwhen the thermostat calls for heating, depending on thesetting of the thermostat fan selector switch. When thethermostat closes (on a call for heating), the thermostatactivates the water or steam control valve to meet heatingrequirements.TEMP system thermostat — The TEMP system ther-mostat works like a room thermostat, but provides forcommunicating control. The TEMP thermostat requiresthe addition of an accessory relay pack to interface withthe unit. This relay pack may be mounted in the low-voltage control compartment. The system operation is thesame as stated in the Room-Mounted Thermostat section.All units — The control circuit incorporates a current-sensing lockout relay (Cycle-LOC™ device) that locks offthe compressor(s) when any safety device is activated (lowor high-pressure switches, condenser-fan motor overloador compressor internal overload). If any compressor safetydevice opens, the compressor(s) will stop and a 24-v signalwill be sent to the X connection of the low-voltage terminalstrip. The signal may be used to light an indicator light onthe unit or remotely. Since the unit is protected by theCycle-LOC device, the compressor(s) will not restart fol-lowing a safety interruption unless the thermostat is satis-fied without cooling operation. To reset the Cycle-LOCcontrol device, manually turn the control power to the unitOFF, then back to the ON position.

High-pressure and low-pressure switches and motoroverload protectors will reset automatically when the con-dition which caused the device to trip has dropped belowthe reset condition.

Controls

23

Typical piping and wiring

LEGEND

NOTES:1. Wiring and piping shown are general points of connection guides only

and are not intended for or to include all details for a specific installation.2. All wiring must comply with applicable local and national codes.3. All piping must follow standard piping techniques. Refer to Carrier Sys-

tem Design Manual Part 3 for details.4. Connect both drains to building waste system and provide a trap of suffi-

cient depth for unit static.

NEC — National Electrical Code

Condenser Airflow

Evaporator Airflow

Power WiringControl Wiring

24

LocationFor best results unit must be properly located and installed.Selected location should not be adjacent to an acousticallysensitive space, for example a conference room or execu-tive office. The best location is in mechanical rooms nearareas like elevators, restrooms, stairways, or similarspaces. The mechanical room should use constructionmethods which will help isolate the transmission of acousti-cal energy.

Since these units typically use large quantities of ductedcondenser air, select a location with the best access to anoutside window or wall to accommodate condenser air lou-ver. Locate the unit as close to the wall opening as possiblebut allow space for return air inlet and access to the evapo-rator and condenser coil for cleaning. Units on the samefloor should have a minimum of 6 ft between units to pre-vent recirculation of condenser air. Units floor to floorshould have a minimum of 10 ft between units to preventrecirculation. Units should not be located with several unitspulling condenser air from a small space between build-ings, where air may be recirculated. Recirculation of con-denser air will result in increased head pressure which maycause units to trip on high pressure.

There are several methods for applying 50BYN units indifferent space applications. See page 27 for recom-mended equipment room applications and locations of keycomponents.

Moving units into existing buildingsThe 50BYN units are designed to pass through most36-in. door openings. The filter rack and duct mountingflanges may also be removed. The height of the 024 sizeunit exceeds some door openings. See the Splitting the50BYN024 Unit section on page 26.

Unit mounting standWhen units are mounted to use an existing window height,a field-supplied steel mounting stand is recommended. Thestand should be built rigidly enough to support the weightof the unit, and be braced to prevent any side to side move-ment of the stand. A mounting height higher than the win-dow sill height is recommended, which allows thecondenser duct to be pitched back to the louver in the win-dow for rain elimination and drainage.

Unit isolationUnit compressors are internally isolated and the compres-sor compartment is lined with acoustical insulation. If addi-tional vibration isolation is desired, rubber in-shear padsare recommended under the four corners of the unit.Spring isolation is not recommended. All duct connectionsto the unit should be made with flexible connections to pre-vent any transmission of vibration to the ductwork.

AccessoriesCondenser air filters can be field-supplied, if desired. Thiswill reduce the need to clean the condenser coil. Seepage 27 for recommended location of condenser air filters.Outside air connections and air economizer — Out-door ventilation air is required for most spaces and the useof an outdoor economizer cycle can save cooling energy.the 50BYN units can be applied with field-provided ventila-tion control options, including CO2 activated ventilation ordifferential economizer. Several methods of bringing the airinto the unit are possible. A mixing box with dampers tocontrol outdoor and return air is the best method. A mixingbox assures adequate mixing of both airstreams. When anintegrated economizer cycle (compressors can operatewith full outdoor air) is used, it is recommended that anevaporator defrost thermostat be put in the unit. This con-trol will turn off the compressors when frost begins to formon the evaporator coil.Heating coils — Accessory steam and hot water coils aremounted in the unit return air before the cooling coil. Thefilter rack provided with the unit is removed, the coilmounted in the same position and the filter rack reattachedto the coil. The same filter rack may be used with ducted orfree return. Care must be exercised in location of outsideventilation or economizer air in to the unit when heatingcoils are used to prevent coil freeze up. Make sureadequate mixing of return and outside air is provided toprevent below freezing temperatures at any point of thecoil. Also be sure that dampers close off outdoor air duringunit shutdown. Spring return outdoor-air dampers arerecommended.Discharge plenum — When unit is to be used directly inthe space to be conditioned without ductwork attached, adischarge plenum with acoustical lining and a dischargegrille on the unit are recommended. It is recommendedthat the fan be slowed down to deliver no more than nomi-nal cfm for best acoustical performance.

Condenser air filter racks, mixing boxes with outdoor airdampers and economizers, and discharge plenums may befield fabricated or are available through specialty accessorymanufacturers.

Application data

25

Evaporator ductworkSupply duct should be properly supported and the aspectratio as close to square as possible. Duct should be sized fora maximum of 2000 fpm velocity in areas outside theequipment room. The duct should be lined with acousticalinsulation for a minimum of 10 ft beyond the equipmentroom. A flexible duct connection should be used on theconnection to the unit to prevent transmission of any unitvibrations into the duct.

Return duct may be attached to the unit, but is not nec-essary. The return to the unit should prevent line of sightvisibility to the space. Insulated return duct is also recom-mended for acoustically sensitive spaces. Maximum veloc-ity should not exceed 1000 fpm over occupied spaces.Adequate return area is essential for proper operation.

Condenser ductworkCondenser supply and discharge air ducts should be asshort and straight as possible. Cross-sectional area of theinlet and discharge should never be less than the face areaof the unit openings. When bends must be made, theyshould be as gradual as space limitations will allow. Detailsand dimensions of correctly designed systems are shownon page 28. If the unit will be operated in cold outdoorweather, or if dampers are not provided at the louver,then the condenser ducts should be insulated to preventcondensation.

Design of the louver used for the inlet and discharge ofthe condenser airflow is critical to preventing recirculationof air and high pressure tips. See page 28 for details ofcondenser louver. The louver blades must be heavy enoughto prevent unit airflow from drawing them together. Louverblades should be a minimum of 18 gage, and widths over30 in. should have stiffeners. The inlet louver should nothave a flange and the discharge louver should have a flangewhich directs the air away from the inlet. The use of adeflector in conjunction with the condenser air discharge isalso recommended.

Piping trapsAll 50BYN units have a drain for the condensate from theevaporator coil. This drain may be relocated to the oppo-site side of the unit if job conditions dictate. The conden-sate trap should have a depth adequate to allow 2 in. ofwater in the trap with the unit running. Provide a clean-outon the trap and vent and pitch the trap for proper drain-age. The condenser section has a complete drain panwhich will collect any rain water which is pulled into thecondenser or from any overflow of the evaporator pan. Ifdesired, this secondary drain should be trapped for 1 in. ofstatic and should have a clean-out and be vented andsloped for drainage. If the condensate line and secondary

drain are connected, the connection must be at a level thatwill not allow condensate to drain back into the secondarydrain.

Condenser head pressure controlUnits are not suitable for use with Motormaster® speedcontrol. Low ambient operation is accomplished with fandischarge dampers which operate with a refrigerant con-trolled operator from lead compressor discharge pressure.Since these units have a low-pressure switch, the use ofwinter start kit is recommended (38AE-900---021). The kitbypasses the low-pressure switch on start-up. The use of adefrost thermostat kit (50BB-900---001) is also recom-mended to sense frost on the evaporator coil if suctiontemperature drops too low.

ControlsAll units require a room mounted 24-v thermostat to com-plete the control system. Carrier has several versions ofthermostats to meet a wide range of job conditions, includ-ing fully programmable and light-activated versions. Inaddition, the unit can be connected to a TEMP thermostat,which allows networking with other units and remote mon-itoring and control. A relay control pack which mounts inthe unit control box is required for the TEMP thermostatoperation. The 50BYN units may also be used with theVVT® system when additional zone control is desired.

The 50BYN unit controls can be integrated with an airside economizer with standard or differential enthalpycontrol.

When demand controlled ventilation is required, theCO2 sensor can be used in conjunction with the TEMP sys-tem to optimize the use of ventilation air.

Operational limitsAirflow — 200 to 500 cfm per tonAir temperature to evaporator:CoolingMaximum 90 FMinimum 70 FHeatingMaximum 75 FMinimum 32 F (when no airflow)CondenserNominal airflow 500 cfm per ton,Range: 300 to 600 cfm per tonCondenser air temperatureMaximum 115 FMinimum without low ambient 55 FMinimum with low ambient 0° F

26

Sound considerationsAll units are acoustically insulated. When installed in ornear areas requiring additional sound attenuation:• Locate unit in equipment room or closet• Use acoustic lining in ductwork• Provide square duct elbows with acoustic lining and

turning vanes• Locate the first supply outlet no less than 10 ft from a

lined elbow.• If unit is located in the conditioned space, return air

opening from the space should be a lined elbow orequivalent.

• For critical applications, use packaged sound attenua-tors or duct silencers. Sound attenuation may be usedon both evaporator air and condenser air.

Setting condenser fan speedThe 50BYN condenser has a centrifugal blower and a vari-able pitch drive which allow adjusting the condenser air-flow to match the static from the louvers, ductwork, filters,and sound traps (if used). It is best to adjust the fan to thenominal airflow and the rpm which will achieve this perfor-mance. Excess airflow and rpm will make units noisier.

Three independent circuit operationThe 50BYN024 unit has 3 compressors, each fully inde-pendent. Three-stage control is possible with a thermostat

which will allow 3 stages of cooling. The third stage can becontrolled by outdoor-air temperature to provide an addi-tional stage with higher outdoor-air temperature. Whenstaging compressors, always stage the circuits such that thefirst compressor operating is the bottom circuit of theevaporator coil and then proceed up the coil in sequence.

Splitting the 50BYN024 unitThe 50BYN024 unit height exceeds 80 in. and may notclear all door openings. To make it easier to move this unitinto existing buildings, the unit may be split into 2 sections.When the unit is shipped, the correct refrigerant charge isisolated in the condenser section with the rest of the sys-tem under vacuum. If the unit will not be split at the job,the valves are opened and the system is ready to run. If thesystem needs to be split, the suction and liquid lines to theevaporator coil can be disconnected at threaded connec-tions between the evaporator and condenser sections. Theevaporator section may then be unbolted and removed.When the unit is in place, the procedure is reversed andthe unit put back together. The evaporator section is thenpulled to a vacuum and the valves opened to allow thecharge to enter the unit. Since the charge is isolated and avacuum is used, the use of recovery equipment for normalinstallation of a split unit is not required.

SOUND PRESSURE LEVELS

NOTES:6. Sound pressure taken in free discharge at a distance of 9.8 ft

(3 m). All readings are at nominal airflow.7. Sound pressure measured in dB with respect to 20 micropascals.

50BYN UNIT PERFORMANCE

UNIT50BYN

INDOOR FAN(Octave Band)

OUTDOOR FAN(Octave Band)

125 250 500 1000 2000 4000 8000 125 250 500 1000 2000 4000 8000006 67.0 68.0 69.0 68.5 66.0 64.0 55.0 75.0 73.0 77.5 68.0 67.0 64.0 54.0008 76.0 71.0 73.0 72.0 69.0 66.0 59.0 75.5 76.0 77.0 70.0 67.5 63.5 53.0012 80.6 79.0 81.0 80.0 79.0 80.0 70.0 77.5 76.5 77.0 73.0 74.0 72.0 59.0014 74.6 74.5 77.0 71.5 71.0 71.0 60.0 80.0 80.0 79.0 77.5 78.0 76.5 64.0016 75.0 76.5 79.5 78.0 73.5 75.5 65.0 84.0 81.0 78.5 76.0 75.5 75.0 65.0024 77.0 75.5 78.5 76.5 74.5 77.5 64.5 83.0 86.5 85.5 80.5 83.5 83.5 72.0

50BYN UNITPERCENTAGE OF NOMINAL CONDENSER AIRFLOW

70 80 90 100 110 120Capacity % 98.0 98.8 99.5 100.0 100.4 100.7Compressor Power % 109.4 105.4 102.4 100.0 98.1 96.5Condenser Fan Power % 61.0 70.0 83.0 100.0 122.0 149.0Discharge Pressure % 111.2 106.5 102.8 100.0 97.7 95.9Total Power % 100.5 99.1 99.0 100.0 102.2 105.4EER % 97.5 99.7 100.5 100.0 98.3 95.6

Application data (cont)

27

*Provide access to clean condenser coil.NOTE: Refer to Installation Instructions for detailed louver information.

28

Application data (cont)

*

INLETLOUVER

F

BD

C

4 3/4" 1"

50BYN

A

DISCHARGELOUVER

50BYN

G

45°

5 5/8"

4"

4"

14 GAGE ALUMINUM OR18 GAGE GALVANIZED STEEL

FLANGENOT PERMISSIBLE

BLADE STIFFENERFOR LOUVER WIDTHSOVER 30"

5"

3"1/2"

4"1"

30°

EXHAUST

VANE DEFLECTOR

CONDENSER INTAKE

TYPICAL RECOMMENDED CONDENSER DUCT DIMENSIONS

*Access panel for condenser coil cleaning.

DIMENSIONS (in.)

UNIT50BYN A B C D F G

006 24 141/8 6 201/8 26 345/8008 24 153/4 6 213/4 26 411/8012 24 14 6 20 26 571/4014 24 14 6 20 26 64/4016 30 157/8 6 217/8 301/8 691/2024 30 18 6 24 361/4 78

INLET LOUVER DETAILDISCHARGE LOUVER DETAIL

DEFLECTOR DETAIL*

*Not to scale.

29

Indoor Self-Contained Air-Cooled UnitConstant Volume ApplicationHVAC Guide SpecificationsSize Range: 5 to 20 TonsCarrier Model Number: 50BYNPart 1 — General1.01 SYSTEM DESCRIPTION

Indoor packaged vertical air-cooled cooling unitusing hermetic scroll compressors and built-in con-denser fan for cooling duty. Unit shall discharge sup-ply air vertically or horizontally and condenser airhorizontally as shown on contract drawings.

1.02 QUALITY ASSURANCEA. Units shall be rated in accordance with ARI Stan-

dard 210/240 or 340/360 as appropriate.B. Unit shall be designed to conform to ANSI/

ASHRAE 15, latest revision safety code, and ULStandard 1995, and shall be UL listed under bothAmerican and Canadian Standards.

C. Unit shall be built in an ISO 9001:2000 certifiedmanufacturing facility and shall be fully run-tested.

D. Insulation, adhesive, and liner system shall meetNFPA 90A requirements for flame spread andsmoke generation.

1.03 DELIVERY, STORAGE, AND HANDLINGUnits shall be stored and handled according to man-ufacturer’s recommendations.

Part 2 — Products2.01 EQUIPMENT

A. General:Factory-assembled, single-piece, air-cooled coolingunit. Unit shall consist of scroll refrigerant compres-sor(s), indoor fan section with belt drive centrifugalfans and motor, evaporator coil section with directexpansion coil and drain pan, air-cooled condenserfan section with belt drive centrifugal fans andmotor, factory wiring, piping and controls, and asystem charge of refrigerant (R-22). Unit may beused with or without return ductwork.

B. Unit Cabinet:1. Cabinet shall be constructed of minimum 18

gage zinc surface alloyed steel with a bakedenamel finish. Unit shall be capable of with-standing ASTM B117 500-hour salt spray test.

2. Cabinet shall be fully insulated. Evaporator sec-tion shall have a full metal liner covering allinsulation, and condenser section shall have fullsound attenuating insulation. Units shall becapable of withstanding ARI insulating effi-ciency test at minimum airflow without cabinetsweating.

3. Unit drain pan shall have positive slope to thedrain to prevent standing water in pan.

4. Panels for servicing shall be easily removableusing a single wrench size.

5. Flanges shall be provided on all evaporator andcondenser air connections for attachment ofductwork.

6. Units larger than 80 in. tall shall be able to besplit into sections no more than 80-in. high.Unit shall be designed to allow refrigerantcharge to be isolated in the condenser sectionwhen the unit is split, without the loss of refrig-erant charge.

C. Evaporator Fan Section:1. Fans shall be double inlet, centrifugal wheel

with forward curved blades designed for contin-uous operation. Fan wheel and scroll shall beconstructed of steel with corrosion resistant fin-ish, and statically and dynamically balanced.

2. Fan shall be belt drive with an adjustable pitchmotor pulley and fixed pitch fan pulley, withpermanently lubricated ball-bearing type bear-ings. Units larger than 12 tons require 2 belts.

3. Motor shall be 3-phase high-efficiency NEMAframe TEFC (totally enclosed fan cooled) of thesame voltage as the compressor(s). Motor shallhave permanently lubricated ball bearings.

4. Fan shall be easily field convertible from verticalto horizontal discharge (except 014 unit size).

D. Compressor:Hermetic scroll compressors shall be internally pro-tected with high pressure relief. Compressors shallbe factory rubber shock mounted with internalspring vibration isolators.

E. Coils:1. Evaporator and condenser coil shall have alumi-

num plate fins mechanically bonded to seamlesscopper tubes with all joints brazed. Tube sheetopenings shall be swaged to prevent tube wear.Coils shall be face split design.

2. Direct expansion coil shall be designed andtested in accordance with ANSI/ASHRAE 15,latest revision safety code.

3. Coil and drain pan shall be accessible throughservice access panels for cleaning.

F. Filter:Filter frame shall be installed upstream of the cool-ing coil, designed to take a 1-in. or 2-in. thick clean-able or disposable type commercially available filter.Filters shall be accessible from either side of the unitand filter rack shall be usable with ducted or freereturn. Disposable filters will be supplied with theunit.

G. Condenser:1. Fans shall be double inlet, centrifugal wheel

with forward curved blades designed for contin-uous operation. Fan wheel and scroll shall beconstructed of steel with corrosion resistant fin-ish, and statically and dynamically balanced.

2. Fan shall be belt drive with an adjustable pitchmotor pulley and fixed pitch fan pulley, with

Guide specifications

30

permanently lubricated, ball-bearing type bear-ings. Drives on all motors 5 hp and larger shallhave a minimum of 2 belts.

3. Motor shall be 3-phase high-efficiency NEMAframe TEFC (totally enclosed fan cooled) of thesame voltage as the compressor(s). Motor shallhave permanently lubricated ball bearings.

4. Condenser shall have a secondary drain panwith drain connection to drain any overflow ofthe evaporator pan or rain in the condensersection.

H. Operating Characteristics:Unit shall be capable of providing a constant volumeof conditioned air at a specified static pressurewithin the unit’s normal operating range. Unit shallhave dual-stage cooling capacity control on all unitssizes 012 to 024. Each compressor shall be on anindependent refrigerant circuit. Unit shall be capableof starting and operating at up to 115 F outdoorambient. Units shall be able to operate down to 0° Fwhen equipped with low ambient damper.

I. Controls and Safeties:1. Units shall be furnished with a control terminal

block for connection of low voltage controlsand thermostats.

2. Unit shall have one of the following controlsystems:a. Room-mounted thermostat shall be mounted

in the conditioned space. Thermostat shallbe either electromechanical or electronictype. Thermostat subbase shall control fanoperation and be capable of turning unit onand off.

b. Room-mounted thermostat with communi-cating capability. This thermostat shall oper-ate like the standard room-mountedthermostat and shall provide the additionalbenefit of being able to communicate withbuilding systems to facilitate unit operationand control.

3. Units shall have the following factory-installed safeties: high and low-pressureswitches, motor and compressor overtempera-ture, current lockout, and inherent automaticfan motor overload.

J. Electrical Requirements:All electrical power wiring shall enter the unit cabi-net at a single location. Control circuit is 24-v, suit-able for a field-supplied 24-v thermostat.

K. Refrigerant Components:Refrigerant circuit components include thermalexpansion valves, distributor with nozzle, filter dri-ers, and charging service valves on each circuit.Suction line shall have a refrigerant loop to preventrefrigerant drain back to the compressor. Suctionpiping shall be insulated with closed cell pipinginsulation.

L. Special Features:1. Heating Coil:

Field-installed steam coil shall be one row; orhot water coil will be 2 rows with copper tubealuminum spiral fins and a galvanized steel cas-ing. Fins shall be bonded to tubes by mechani-cal expansion. Coil to be leak tested at 350 psigair pressure submerged in water and chargedwith dry air. Coil shall mount external to theunit.

2. Low Ambient Control Damper:Field-installed refrigerant operated damper formounting on condenser air discharge. Dampermodulates condenser air to control head pres-sure and permits unit to operate in cooling evenin winter when outdoor air temperature is low.Damper automatically restricts condenser air-flow to maintain correct condensing pressurefor efficient operation at temperatures down to0° F.

3. Thermostats:A complete line of thermostats shall be avail-able to meet any application control require-ments. Thermostat shall be provided by the unitmanufacturer.

4. Defrost Thermostat:Field-installed thermostat shall be available toshut down compressor when frost builds onevaporator coil.

5. Winter Start Kit:Package shall provide time delay for the low-pressure switch.

6. Discharge Plenum:Kit shall be available for free blow applications.

Guide specifications (cont)

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.Pg 32 Catalog No. 04-52500027-01 Printed in U.S.A. Form 50BYN-3PD

Replaces: 50BYN-2PDSection 5Tab 5a

Carrier Corporation • Syracuse, New York 13221 9-08

Features/BenefitsTable of ContentsModel Number NomenclatureARI Capacity RatingsPhysical DataField-Installed AccessoriesBase Unit DimensionsAccessory DimensionsSelection ProcedurePerformance DataCooling CapacitiesHeating Coil CapacitiesCondenser Fan PerformanceEvaporator Fan Performance

Electrical DataTypical Wiring SchematicControlsTypical Piping and WiringApplication DataGuide Specifications

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Product OMNIZONE™ Data 50BYN006-024 Air-Cooled Systems · 50BYN Omnizone™ Indoor Self-Contained Air-Cooled Unit Model number nomenclature A50-8289.eps. 4 *Unit size 024 is factory