Product Data. Features/Benefits. 50BYN Single-Package Air Cooled Vertical Packaged Units. 5to20Tons

Product Data 50BYN Single-Package Air Cooled Vertical Packaged Units 5to20Tons The 50BYN units are single-package cooling units with integral air-cooled condensers designed for indoor installations. They 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. 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/Benefits Design flexibility Carrier indoor package units are designed to provide the flexibility required 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. The compact footprint and service from the front of the units save valuable floor space in equipment rooms. Belt drive condensers provide adequate static to overcome ducting and louver static losses. This allows units to be positioned 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 conditioned 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. Copyright 1998 Carrier Corporation Form 50BY-1PD

Easy installation and maintenance The units are completely pre-piped and wired at the factory to ensure time and money saving installation and service. Exterior access panels are easily removed to provide speedy inspection and service work may be done from the front of the unit. Precision engineered parts translate to a quality built, reliable design that will operate efficiently, minimize service calls, and provide years or reliable operation. Designed for customer satisfaction Where space and styling are important considerations. Models 50BYN are designed 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, filtering, and air circulation. All units are designed to fit through most standard doors. The 20 ton size may be easily field split to simplify moving the units into existing buildings. Special features for outstanding performance High efficiency Carrier scroll compressors deliver quiet, reliable cooling capacity. Compressor motor protection is assured by quick-acting, internal sensing elements that prevent trouble before it starts. Space-saver slab type evaporator and condenser coils use Carrier s advanced heat transfer technology and provide peak heat transfer efficiency with large coil face area. Fins are mechanically bonded to nonferrous, seamless tubing for efficient leakfree operation. Quiet fan performance large volumes of indoor air are moved quietly. Compact housing and specially designed discharge air section provide superior air handling capacity. Convenient front access electrical control center contains all factory prewired control devices. Utilizing a specially designed sloped condensate pan, water will not accumulate in the basepan, meeting the ASHRAE 62 (American Society of Heating, Refrigeration and Air Conditioning Engineers) indoor-air quality standards to provide a comfortable and safe occupied space. As a result of this new design, the coil is easily accessed for cleaning. The interior of the evaporator section is lined with a heavy gage aluminum liner, providing cleanable surfaces for optimum indoor air quality. The weather-resistant cabinets are The 10 to 15 ton units are 2 compressors each on independent cir- constructed of galvanized steel, bonderized, and coated on all external cuits. This provides backup protection and better part load operat- surfaces with a baked enamel finish. The paint finish is nonchalking and is ing efficiency. capable of withstanding ASTM The 20 ton unit uses 3 compressors, Standard No. 117 500-hour salt each on its own independent circuit. spray test. Standard wiring from the factory A choice of controls provides the flexibility to meet almost any applica- and 1 compressor on the second has 2 compressors on the first stage tion. Choose between a full line of stage. This can be easily changed at Carrier room-mounted thermostats, the jobsite to put 2 compressors or the Carrier TEMP System thermostat which provides for communiing 3 steps of control, for optimum on the second stage or even providcating control or interface to VVT part load operation. (variable volume and temperature) All motors are protected against singlephasing conditions. systems. Full compressor protection is assured Units are built in an ISO 9000 (International Standards Organization) certi- by several devices, including Cycle- LOC current-sensing lockout relay, fied manufacturing facility, and are Time Guard II anti-short cycle fully run-tested. In addition, all units control, and high- and low-pressurestats. have as standard the capability to These devices lock out the compressor under abnormal operating indicate a needed service. conditions to prevent compressor Evaporator fan on the 20 ton unit damage and ensure long life. easily removable to aid in rigging unit into existing buildings. Fan discharge on all sizes (except 014 size) The 50BYN units are fully warrantied as shipped from the factory, including can be quickly converted from vertical 1 year on all parts (compressor included). Additional 2 to 5 year to horizontal front supply. warranty on the compressor is standard on 5 to 15 ton units, and is vide a choice when installing the unit. Dual condensate drain locations pro- available as an option on the 20 ton The installer can use whichever unit. drain best suits the particular application, saving both installation time Easy to understand and operate controls provide a virtually mistake-proof drain provides protection against and expense. A built-in secondary control operation. a plugged primary drain or rain entering the condenser, and may elimi- Two-stage capacity control provides back-up protection, additional operating efficiency, and energy drain pan at the jobsite. nate the need to provide an additional savings. Table of contents Page Features/Benefits... 1,2 ARI Capacities... 3 Model Number Nomenclature... 3 Field-Installed Accessories... 3 Physical Data... 4 Base Unit Dimensions... 5-7 Selection Procedure... 8 Performance Data... 9-15 Electrical Data... 16 Typical Wiring Schematic... 17 Controls... 18 Typical Piping and Wiring... 19 Application Data...20-24 Guide Specifications...25,26 2

Model number nomenclature ARI* capacities UNIT 50BYN NOMINAL TONS EVAPORATOR CFM CONDENSER CFM NET COOLING (Btuh) TOTAL kw EER/ SEER IPLV 006 5 2,000 3,000 59,000 6.6 10.0 008 7 1 2 3,000 4,500 81,000 9.1 8.9 8.3 012 10 4,000 6,000 121,000 14.2 8.5 7.5 014 12 4,800 7,200 137,000 16.1 8.5 7.5 016 15 6,000 9,000 162,000 19.0 8.5 7.5 024 20 8,000 12,000 224,000 26.3 8.5 7.5 LEGEND EER Energy Efficiency Ratio IPLV Integrated Part Load Value SEER Seasonal Energy Efficiency Ratio *ARI Air Conditioning and Refrigeration Institute. SEER applies to 5 ton unit only. Field-installed accessories Heating coils Field installed coils for hot water or steam, with convenient field piping connections on side of unit. Coil mounts in front of cooling coil and uses unit return-air filter track. Thermostats A complete line of Carrier thermostats is available to meet any control requirements, including Carrier TEMP System thermostats for diagnostics and communicating capability. Low ambient damper Refrigerant pressure operated damper mounted on condenser air discharge modulates to control head pressure. Permits unit to operate in cooling even in winter, when outdoor air temperature is low. Damper automatically restricts condenser airflow to maintain correct condensing pressure for efficient operation at temperatures down to 0 F. Winter start kit This package provides a time delay for the low-pressure switch. Defrost thermostat kit This package allows the unit compressor to turn off when frost begins to form on the evaporator coil. Discharge plenum This kit is for use in free blow applications for controlled free blow into the conditioned space. Economizer mixing box This kit is for free cooling with or without Differential Enthalpy. CO2 sensor This kit is for Indoor-Air Quality Control when Economizer is used. 3

Physical data UNIT 50BYN 006 008 012 014 016 024 NOMINAL CAPACITY (tons) 5 7 1 2 10 12 15 20 UNIT OPERATING WEIGHT (lb) 594 765 948 1036 1190 1654 COMPRESSOR Carrier Scroll Model SR58 SR75 SR58 SR58/SR75 SR75 SR75 Quantity 1 1 2 1/1 2 3 Rpm 3500 Oil Charge (oz) 44 50 44/44 50/44 50/50 50/50/50 Steps of Control 1 1 2 2 2 2* OPERATING CHARGE R-22 (lb) 8.6 10.1 8.0/8.8 8.8/10.6 9.9/9.9 9.9/9.9/9.9 EVAPORATOR FAN Adjustable, Belt-Driven, Centrifugal Nominal Cfm 2000 3000 4000 4800 6000 8000 Cfm Range 1,500-2,500 2,250-3,750 3,000-5,000 3,750-6,250 4,500-7,500 6,000-10,000 Available Static 1.2 1.25 2.25 2.25 2.0 2.0 Fan Size 10 1 2 x7 1 2 11x8 12 1 2x9 1 2 14x12 12 1 2x9 1 2 12 1 2 x9 1 2 Number of Fans 1 1 1 1 2 2 Standard Speed Range (Rpm) 1058-1449 950-1300 860-1120 849-1117 1045-1308 930-1160 Max Allowable Rpm 1900 1700 1500 1360 1900 1600 Motor Rpm 1725 Vertical Belt Quantity...Type 1...A36 1...A37 1...B41 1...B39 2...A42 2...B52 Horizontal Belt Quantity Type 1...A24 1...A25 1...B32 None 2...A31 2...B41 Fan Pulley (in.) 4 1 4 4 3 4 8 5 8 8 5 8 6 5 8 7 1 2 Motor Pulley (in.) 2 1 2-3 1 2 2 1 2-3 1 2 4 1 8-5 1 2 4 1 8-5 1 2 4-5 4 3 4-6 Nominal Hp...Frame Size 1 1 2...145T 2...145T 3...182T 5...184T 5...184T 7 1 2...184T Fan Shaft Size (mm) 20 20 20 20 25 25 Motor Shaft Size (in.) 7 8 7 8 1 1 8 1 1 8 1 1 8 1 1 8 Center Distance (in.) min/max 13.6-13.8 13.2-13.4 10.4-11.9 9.6-10.6 12.2-13.7 17.6-18.7 Center Distance (in.) min/max.** 6 11 16-7 11 16 6 3 8-7 3 8 N/A N/A 7-8 10 5 8-11 7 16 EVAPORATOR COIL 3 8-in. OD, Enhanced Copper Tube, Aluminum Fins Quantity Rows - Fin/in. 3...14 4...14 4...14 4...14 4...14 4...15 Face Area (sq ft) 5.7 7.0 9.5 10.8 12.2 17.6 RETURN AIR FILTERS 1 or 2 in. Disposable Type Quantity...Size 1...16 x 25 1...20 x 25 1...25 x 25 1...20 x 25 3...20 x 25 3...16 x 25 1...20 x 25 2...25 x 25 1...20 x 25 8...16 x 20 CONDENSER FAN Adjustable, Belt-Driven, Centrifugal Nominal Cfm 3000 4500 6000 7200 9000 12,000 Cfm Range 2,250-3,750 3,375-5,625 4,500-7,500 5,400-9,000 6,750-11,250 9,000-15,000 Available Static 1.0 1.0 1.0 1.0 1.0 1.0 Fan Size 11x11 12 1 2x12 1 2 11x11 11x11 12 1 2x12 1 2 14x14 Number of Fans 1 1 2 2 2 2 Standard Speed Range (Rpm) 952-1304 849-1117 1038-1305 1038-1305 903-1136 930-1150 Max Allowable Rpm 1700 1500 1700 1700 1500 1360 Motor Rpm 1725 Belt Quantity...Type 1...A65 1...B69 2...A57 2...A67 2...A78 2...B88 Fan Pulley (in.) 4 3 4 8 1 2 6 3 4 6 3 4 7 3 4 9 1 2 Motor Pulley (in.) 2 1 2-3 1 2 4 1 2-5 1 2 4-5 4-5 4-5 42 3 4-6 Nominal Hp...Frame Size 2...145T 3...182T 5...1845 5...184T 5...184T 7 1 2...184T Fan Shaft Size (mm) 20 20 25 25 25 25 Motor Shaft Size (in.) 7 8 1 1 8 1 1 8 1 1 8 1 1 8 1 1 8 Center 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 Fins Quantity Rows...Fins/in. 4...14 4...14 5...14 5...14 5...14 5...15 Face Area (sq ft) 6.4 7.7 10.5 11.8 14.2 19.4 CONTROLS 24 Volts Provided in Unit High Pressure Cutout (psig) 395 Cut-in (psig) 300 Low Pressure Cutout (psig) 27 Cut-in (psig) 67 Fusible Plug 203 F Time Guard II Devices 5 Minutes on Each Circuit CONDENSATE DRAIN LINE 2@ 3 4BPS LEGEND NPT National Pipe Thread BPS British Pipe Standard (NPT pipe will work with the type of fitting) *The 20 ton unit is factory wired for 2 stages of capacity control. With the addition of a threestage thermostat or outdoor-air thermostat, the unit is capable of 3 stages of capacity control. Shaft center distances shown are for vertical discharge arrangement. **Shaft center distances shown are for horizontal discharge arrantement. 4

Base unit dimensions 50BYN006-014 DIM. 50BYN006 50BYN008 50BYN012 50BYN014 mm ft-in. mm ft-in. mm ft-in. mm ft-in. A 1800 5-10 5 8 1700 5-10 5 8 1780 5-10 1780 5-10 B 1040 3-5 1231 4-0 1 2 1613 5-3 1 2 1804 5-11 C 690 2-3 1 8 690 2-3 1 8 745 2-5 3 8 745 2-5 3 8 D 765 2-6 1 8 765 2-6 1 8 825 2-8 1 2 825 2-8 1 2 E 355 1-2 420 1-4 1 2 608 2-0 675 2-2 5 8 F 170 0-6 3 4 158 0-6 1 4 79 0-3 1 8 193 0-7 5 8 G 320 1-0 5 8 357 1-2 402 1-3 7 8 452 1-5 3 4 H 310 1-0 1 4 350 1-1 3 4 372 1-2 5 8 424 1-4 3 4 J 593 1-11 3 8 593 1-11 3 8 665 2-2 1 4 665 2-2 1 4 K 554 1-9 7 8 554 1-9 7 8 457 1-6 457 1-6 L 584 1-11 584 1-11 584 1-11 584 1-11 M 23 0-0 7 8 23 0-0 7 8 21 0-0 7 8 21 0-0 7 8 N 17 0-0 5 8 17 0-0 5 8 17 0-0 5 8 17 0-0 5 8 P 11.5 0-0 1 2 11.5 0-0 1 2 11.5 0-0 1 2 11.5 0-0 1 2 Q 43 0-1 3 4 43 0-1 3 4 43 0-1 3 4 43 0-1 3 4 R 605 1-11 3 4 605 1-11 3 4 605 1-11 3 4 605 1-11 3 4 S 50 0-2 55 0-2 1 8 55 0-2 1 8 55 0-2 1 8 T 360 1-2 1 8 400 1-3 3 4 357 1-2 357 1-2 V 50 0-2 20 0-0 7 8 24 0-1 24 0-1 W 660 2-2 660 2-2 660 2-2 660 2-2 X 535 1-9 1 8 535 1-9 1 8 590 1-11 1 4 590 1-11 1 4 Y 190 0-7 1 2 190 0-7 1 2 190 0-7 1 2 190 0-7 1 2 Z 124 0-4 7 8 124 0-4 7 8 124 0-4 7 8 124 0-4 7 8 AA 475 1-6 3 4 475 1-6 3 4 475 1-6 3 4 475 1-6 3 4 AB 140 0-5 1 2 140 0-5 1 2 140 0-5 1 2 140 0-5 1 2 AC 60 0-2 3 8 60 0-2 3 8 60 0-2 3 8 60 0-2 3 8 AD 21 0-0 7 8 21 0-0 7 8 21 0-0 7 8 21 0-0 7 8 AE 225 0-8 7 8 225 0-8 7 8 217 0-8 1 2 217 0-8 1 2 AF 155 0-6 1 8 155 0-6 1 8 155 0-6 1 8 155 0-6 1 8 AG 190 0-7 1 2 190 0-7 1 2 190 0-7 1 2 190 0-7 1 2 AH 73 0-2 7 8 61 0-2 3 8 59 0-2 3 8 59 0-2 3 8 AJ 895 2-11 1 4 1110 3-9 3 4 1495 4-10 7 8 1686 5-6 3 8 AK 386 1-3 1 4 405 1-4 260 0-10 5 8 356 1-2 AL 433 1-5 480 1-6 7 8 433 1-5 433 1-5 AM 275 0-10 7 8 275 0-10 7 8 AN 433 1-5 433 1-5 AP 80 0-3 1 8 80 0-3 1 8 80 0-3 1 8 80 0-3 1 8 AQ 880 2-10 5 8 1070 3-6 1 8 1455 4-9 1 4 1645 5-4 3 4 AR 41 0-1 5 8 41 0-1 5 8 41 0-1 5 8 41 0-1 5 8 AS 533 1-9 605 1-11 7 8 807 2-7 3 4 920 3-0 1 4 AT 347 1-1 5 8 355 1-2 375 1-2 3 4 395 1-3 1 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 [914] clearance for filter removal. CORNER WEIGHTS Dim. 50BYN006 50BYN008 50BYN012 50BYN014 kg lb kg lb kg lb kg lb A 65.3 144 84 185 107 236 108.0 238 B 68.5 151 81 179 107 236 112.5 248 C 69.4 153 89 135 108 239 127.0 280 D 65.8 145 92 203 108 239 119.0 263 5

Base unit dimensions 50BYN016 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 [914] clearance for filter removal. CORNER WEIGHTS Dim. 50BYN016 kg lb A 119.0 263 B 141.5 312 C 151.5 334 D 127.5 281 DIM. 50BYN016 mm ft-in. A 2032 6-8 B 1905 6-3 C 745 2-5 3 8 D 825 2-8 1 2 E 543 1-9 3 8 F 257 0-10 1 8 G 356 2-2 H 353 1-1 7 8 J 635 2-1 K 665 2-2 1 4 L 597 1-11 1 2 M 19 0-0 3 4 N 17 0-0 5 8 P 17 0-0 5 8 Q 43 0-1 3 4 R 607 1-11 7 8 S 84 0-3 3 8 T 402 1-3 7 8 V 22 0-0 7 8 W 765 2-6 1 8 X 603 1-11 3 4 Y 190 0-7 1 2 Z 124 0-4 7 8 AA 432 1-5 AB 83 0-3 1 4 AC 60 0-2 3 8 AD 21 0-0 7 8 AE 217 0-8 1 2 AF 141 0-5 1 2 AG 190 0-7 1 2 AH 86 0-3 3 8 AJ 1737 5-8 3 8 AK 318 1-0 1 2 AL 483 1-7 AM 311 1-0 1 4 AN 483 1-7 AP 70 0-2 3 4 AQ 1765 5-9 1 2 AR 41 0-1 5 8 AS 979 3-2 1 2 AT 385 1-3 1 8 AV 276 0-10 7 8 6

Base unit dimensions 50BYN024 CORNER WEIGHTS Dim. 50BYN024 kg lb A 183 403 B 194 428 C 192 424 D 181 400 DIM. 50BYN024 mm ft-in. A 2341 7-8 1 4 B 2108 6-11 C 794 2-7 1 4 D 872 2-10 3 8 E 508 1-8 F 184 0-7 1 4 G 406 1-4 H 379 1-3 J 654 1-1 3 4 K 796 2-7 1 4 L 584 1-11 M 28 0-1 1 8 N 30 0-1 1 4 P 51 0-2 Q 43 0-1 3 4 R 805 2-7 3 4 S 65 0-2 1 2 T 457 1-6 V 16 0-0 5 8 W 921 3-0 1 4 X 610 2-0 Y 202 0-8 Z 86 0-3 3 8 AA 422 1-4 5 8 AB 140 0-5 1 2 AC 60 0-2 3 8 AD 21 0-0 7 8 AE 226 0-8 7 8 AF 140 0-5 1 2 AG 220 0-8 3 4 AH 62 0-2 1 2 AJ 1984 6-6 1 8 AK 335 1-4 1 4 AL 530 1-8 7 8 AM 356 1-2 AN 530 1-8 7 8 AP 76 0-3 AQ 1956 6-5 AR 41 0-1 5 8 AS 1085 3-6 3 4 AT 399 1-3 3 4 AV 314 1-0 3 8 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 [914] clearance for filter removal. 7

Selection procedure (with example) I Determine design conditions. Given: Cooling Requirements Total Cooling Capacity (TC)...87,000 Btuh Sensible Cooling Capacity (SHC)...70,000 Btuh Evaporator Air Quantity...3,000 Cfm Summer Entering-Air Conditions: Entering dry bulb (edb)...82f Entering wet bulb (ewb)...67f Entering Condenser Air Temp (EAT)...95F Unit Voltage...460V Heating Requirements Total Heating Load (TC)...200,000 Btuh Winter Entering-Air Temp (edb)...50f Entering Hot Water Temp (ewt)...200f Fan Requirements External Static Pressure Required ESP (in. wg)... 0.75 II Select unit based on cooling requirements. Enter Cooling Capacities table for unit at 3000 cfm and required wet bulb of 67 F and read down to the section displaying capacities with 95 F entering air temperature. The 50BYN008 provides a total capacity closest to design requirements. For out example: Unit selection 50BYN008 Selected at 3000 cfm of 82 F edb, 67 F ewb entering air. TC = 88,800 Btuh Corrected SHC = 66,100 Btuh + (1.45 x 3000 cfm) = 70,456 Btuh (See SHC Correction Table, following cooling capacity tables.) Compressor Power Input = 5.08 kw Leaving Air db 82 F (70,456/[1.1 x 3000 cfm]) = 60.6 F Leaving Air wb h at 67 F wb = 31.62 31.62 (88,800 Btuh/[4.5 x 3000 cfm]) = 25.06 wb at 25.04 = 56.9 F III Determine heating capacity. Enter Accessory Heating Coil Capacities table, page 12, with selected air cfm. Select the desired water temperature drop and read data, then correct as indicated in heating correction tables. 200 F hot water selection: TC = 211,000 Btuh selected at 3000 cfm correction factor at of 50 F entering air is 1.08, then TC is 227,000 Btuh this will exceed the job requirements. Heating leaving air temperature 50 F + (227,000 Btuh/[1.1 x 3000 cfm]) = 118.8 F Heating gpm 227,000 Btuh/(20 F x 500 ) = 22.7 gpm IV Fan requirements. External static pressure (ESP) required 0.75 in. wg Static pressure loss through heating coil 0.08 in. wg Total external static required 0.83 in. wg Enter Fan Performance tables, page 13 for cfm, and static pressure required to obtain the following data: For 3000 cfm and 0.83 ESP, by interpolation the fan operates at 1280 rpm and requires 1.6 brake horsepower. Since standard motor horsepower is 2.0, it will produce the necessary cfm and ESP for this job. 8

Performance data GROSS COOLING CAPACITIES 50BYN006 (5 TON) Air Entering Evaporator Cfm/BF Condenser Air 1500/0.16 2000/0.30 Air Entering Evaporator Wet Bulb Temperature Ewb (F) 2500/0.40 Cfm Temp 72 67 62 57 72 67 62 57 72 67 62 57 TC 71.2 65.4 59.9 56.1 74.9 68.7 63.3 61.7 77.3 70.9 65.9 65.7 75 SHC 33.1 41.1 48.8 54.0 37.0 47.2 57.0 59.7 40.7 53.1 63.5 63.7 kw 3.36 3.30 3.23 3.19 3.41 3.34 3.28 3.26 3.45 3.37 3.31 3.31 TC 68.9 63.1 57.9 54.6 72.4 66.4 60.8 59.9 74.5 68.4 63.7 63.6 85 SHC 32.2 40.1 47.9 52.5 36.1 46.3 55.8 57.9 39.7 52.1 61.6 61.5 kw 3.71 3.63 3.57 3.53 3.76 3.68 3.60 3.60 3.80 3.71 3.65 3.64 TC 66.0 60.9 55.6 52.9 69.6 63.8 58.7 58.0 71.6 65.7 61.7 61.6 3000 95 SHC 31.3 39.2 46.8 50.9 35.2 45.4 54.7 66.0 38.7 51.1 59.6 59.6 kw 4.10 4.01 3.93 3.89 4.15 4.06 3.98 3.97 4.18 4.09 4.03 4.03 TC 63.9 58.5 53.4 51.2 66.9 61.2 56.4 56.0 68.4 63.0 59.5 59.5 105 SHC 30.3 38.2 45.9 49.2 34.2 44.3 53.4 54.0 37.6 50.0 57.4 57.5 kw 4.51 4.42 4.33 4.30 4.57 4.47 4.39 4.38 4.59 4.52 4.45 4.45 TC 60.9 56.0 51.2 49.4 63.6 58.3 54.0 53.9 65.2 59.7 57.1 57.1 115 SHC 29.0 37.2 44.8 47.4 33.0 43.2 51.8 51.9 36.6 48.7 55.1 55.0 kw 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 (7 1 2 TON) Air Entering Evaporator Cfm/BF Condenser Air 2250/0.19 3000/0.34 Air Entering Evaporator Wet Bulb Temperature Ewb (F) 3750/0.43 Cfm Temp 72 67 62 57 72 67 62 57 72 67 62 57 TC 99.8 91.5 83.7 80.5 104.0 95.9 88.0 88.2 107.0 98.6 93.4 93.5 75 SHC 46.7 59.0 71.1 76.6 53.0 69.0 83.1 84.3 58.8 78.1 89.5 89.6 kw 4.12 4.03 3.93 3.89 4.19 4.10 3.99 4.00 4.23 4.13 4.06 4.06 TC 96.7 88.4 80.3 78.3 101.1 92.3 85.6 85.6 104.0 94.8 90.7 90.7 85 SHC 45.7 57.7 69.8 74.4 51.6 67.4 81.7 81.7 57.4 76.8 86.8 86.8 kw 4.63 4.50 4.39 4.35 4.69 4.57 4.47 4.47 4.73 4.61 4.55 4.55 TC 93.1 85.1 77.8 75.9 97.1 88.8 82.9 82.9 99.0 91.1 87.6 87.8 4500 95 SHC 44.3 56.4 68.4 72.0 50.4 66.1 79.0 79.0 56.0 75.3 83.7 83.9 kw 5.15 5.01 4.89 4.86 5.21 5.08 4.98 4.98 5.26 5.13 5.07 5.07 TC 89.4 81.8 74.9 73.6 93.1 85.1 80.1 80.0 95.3 87.1 84.7 84.6 105 SHC 43.0 55.1 67.1 69.7 48.9 64.8 76.2 76.1 54.6 73.8 80.8 80.7 kw 5.70 5.55 5.42 5.39 5.78 5.63 5.53 5.53 5.82 5.67 5.62 5.62 TC 85.8 78.3 71.7 71.0 88.9 81.4 77.2 77.2 91.0 83.4 81.5 81.4 115 SHC 41.7 53.8 65.5 67.1 47.6 63.4 73.3 73.3 53.4 72.5 77.6 77.5 kw 6.29 6.13 5.98 5.96 6.38 6.20 6.12 6.12 6.41 6.26 6.22 6.22 LEGEND BF Bypass Factor Ewb Entering Wet-Bulb kw Compressor Motor Power Input (kilowatts) SHC Sensible Heat Cap. (1000 Btuh) TC Total Cap. (1000 Btuh) Gross 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. SHC correction table 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. BYPASS FACTOR (BF) ENTERING AIR DRY-BULB TEMP (F) 79 78 77 76 75 under 75 81 82 83 84 85 over 85 Correction Factor.05 1.045 2.09 3.14 4.18 5.23.10.98 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 Use formula shown below. Correction Factor = 1.10 x (1 BF) x (edb 80). 4. The following formulas may be used. sensible capacity (Btuh) t ldb = tedb 1.10 x cfm t lwb = Wet-bulb temperature corresponding to enthalpy of air leaving evaporator coil (h). total capacity (Btuh) h lwb = hewb 4.5 x cfm Where: h = Enthalpy of air entering evaporator coil. 9

Performance data (cont) GROSS COOLING CAPACITIES (cont) 50BYN012 (10 TON) Air Entering Evaporator Cfm/BF Condenser Air 3000/0.015 4000/0.031 Air Entering Evaporator Wet Bulb Temperature Ewb (F) 5000/0.051 Cfm Temp 72 67 62 57 72 67 62 57 72 67 62 57 TC 141.8 129.3 118.1 111.2 148.9 136.2 125.2 123.0 153.6 140.7 131.4 131.4 75 SHC 69.9 85.7 101.2 111.2 78.8 99.3 119.1 123.0 87.0 112.0 131.4 131.4 kw 8.13 7.91 7.72 7.59 8.26 8.04 7.84 7.81 8.35 8.13 7.96 7.96 TC 136.7 124.7 113.7 107.9 143.4 131.0 120.7 119.2 147.7 135.2 127.0 127.0 85 SHC 67.9 83.7 99.1 107.9 76.7 97.2 116.8 119.2 84.9 109.8 127.0 127.0 kw 8.92 8.68 8.48 8.37 9.05 8.81 8.62 8.59 9.14 8.91 8.74 8.74 TC 131.3 119.7 109.2 104.4 137.5 125.7 116.0 115.1 141.4 129.4 122.5 122.5 6000 95 SHC 65.7 81.5 96.9 104.4 74.5 95.0 114.3 115.1 82.6 107.4 122.5 122.5 kw 9.76 9.53 9.31 9.21 9.89 9.66 9.47 9.45 9.98 9.74 9.59 9.59 TC 125.5 114.4 104.4 100.7 131.4 120.0 111.0 110.8 134.7 123.4 117.8 117.8 105 SHC 63.5 79.3 94.6 100.7 72.3 92.7 111.0 110.8 80.3 105.0 117.8 117.8 kw 10.66 10.41 10.19 10.11 10.80 10.56 10.36 10.35 10.88 10.63 10.52 10.52 TC 119.6 108.9 99.5 96.7 124.7 113.9 106.1 106.1 127.7 117.2 112.7 112.7 115 SHC 61.3 77.0 92.2 96.7 69.9 90.3 106.1 106.1 77.8 102.4 112.7 112.7 kw 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) Air Entering Evaporator Cfm/BF Condenser Air 3600/0.06 4800/0.09 Air Entering Evaporator Wet Bulb Temperature Ewb (F) 6000/0.11 Cfm Temp 72 67 62 57 72 67 62 57 72 67 62 57 TC 153.8 148.0 142.5 140.1 161.4 155.0 149.8 149.2 165.7 159.5 155.3 155.3 75 SHC 79.2 100.3 123.9 140.1 87.5 113.8 143.8 149.2 94.9 125.8 155.3 155.3 kw 9.15 9.05 9.06 9.01 9.40 9.29 9.21 9.20 9.41 9.30 9.23 9.23 TC 148.4 142.7 137.5 135.5 155.1 149.3 144.3 144.0 159.4 153.4 149.7 149.7 85 SHC 77.0 97.9 121.5 135.5 85.2 111.3 141.1 144.0 92.4 123.1 149.7 149.7 kw 10.15 10.05 9.99 9.95 10.35 10.24 10.15 10.14 10.41 10.30 10.23 10.23 TC 142.7 137.2 132.3 130.7 148.8 143.2 138.6 138.6 152.8 147.1 143.9 143.9 7200 95 SHC 74.7 95.4 119.0 130.7 82.8 108.6 138.6 138.6 89.8 120.4 143.9 143.9 kw 11.21 11.10 11.01 10.97 11.36 11.25 11.16 11.15 11.47 11.36 11.29 11.29 TC 136.6 131.4 126.7 126.6 142.3 136.9 133.0 133.0 145.9 140.5 137.8 137.8 105 SHC 72.3 92.8 116.4 125.6 80.2 105.8 133.0 133.0 87.2 117.6 137.8 137.8 kw 12.32 12.20 12.07 12.04 12.44 12.32 12.24 12.23 12.59 12.48 12.40 12.40 TC 130.2 125.2 120.8 120.1 135.4 130.4 127.0 127.0 138.6 133.6 131.5 131.5 115 SHC 69.8 90.1 113.8 120.1 77.5 102.8 127.0 127.0 84.4 114.6 131.5 131.5 kw 13.49 13.38 13.22 13.19 13.59 13.48 13.40 13.40 13.78 13.67 13.61 13.61 LEGEND BF Bypass Factor Ewb Entering Wet-Bulb kw Compressor Motor Power Input (kilowatts) SHC Sensible Heat Cap. (1000 Btuh) TC Total Cap. (1000 Btuh) Gross 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. SHC correction table 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. BYPASS FACTOR (BF) ENTERING AIR DRY-BULB TEMP (F) 79 78 77 76 75 under 75 81 82 83 84 85 over 85 Correction Factor.05 1.045 2.09 3.14 4.18 5.23.10.98 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 Use formula shown below. Correction Factor = 1.10 x (1 BF) x (edb 80). 4. The following formulas may be used. sensible capacity (Btuh) t ldb = tedb 1.10 x cfm t lwb = Wet-bulb temperature corresponding to enthalpy of air leaving evaporator coil (h). total capacity (Btuh) h lwb = hewb 4.5 x cfm Where: h = Enthalpy of air entering evaporator coil. 10

Performance data (cont) GROSS COOLING CAPACITIES (cont) 50BYN016 (15 TON) Air Entering Evaporator Cfm/BF Condenser Air 4500/0.22 6000/0.35 Air Entering Evaporator Wet Bulb Temperature Ewb (F) 7500/0.45 Cfm Temp 72 67 62 57 72 67 62 57 72 67 62 57 TC 186.2 169.6 154.4 149.0 194.0 177.4 163.8 163.4 200.0 182.6 173.2 173.0 75 SHC 90.8 115.2 138.6 149.0 102.0 134.0 163.8 163.4 113.6 151.4 173.2 173.0 kw 10.48 10.22 9.88 9.88 10.62 10.36 10.14 10.14 10.72 10.46 10.30 10.30 TC 179.4 163.2 149.0 144.6 187.2 170.4 158.0 158.0 192.0 175.2 167.4 167.8 85 SHC 88.6 112.4 135.8 144.6 100.2 131.2 158.0 158.0 111.6 148.8 167.4 167.8 kw 11.78 11.48 11.22 11.12 11.94 11.62 11.40 11.40 12.04 11.74 11.60 11.58 TC 172.2 157.4 143.0 140.0 179.6 163.8 153.2 153.0 184.0 168.2 161.8 162.0 9000 95 SHC 85.4 110.0 133.2 140.0 97.0 128.6 153.2 153.0 108.2 146.0 161.8 162.0 kw 13.16 12.84 12.50 12.44 13.34 13.00 12.76 12.74 13.44 13.10 12.96 12.96 TC 165.4 150.8 137.6 135.4 172.2 156.8 147.6 147.4 176.0 160.8 156.0 156.2 105 SHC 83.0 107.4 130.6 135.4 94.8 125.4 147.6 147.4 105.4 143.0 156.0 156.2 kw 14.62 14.26 13.90 13.84 14.82 14.42 14.20 14.20 14.92 14.56 14.42 14.42 TC 158.2 144.2 131.8 130.6 164.0 149.8 142.0 142.2 167.6 153.4 150.0 150.0 115 SHC 80.6 104.6 127.8 130.6 91.8 123.0 142.0 142.2 130.4 140.0 150.0 150.0 kw 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) Air Entering Evaporator Cfm/BF Condenser Air 6000/0.15 8000/0.30 10,000/0.40 Air Entering Evaporator Wet Bulb Temperature Ewb (F) Cfm Temp 72 67 62 57 72 67 62 57 72 67 62 57 TC 270.9 246.9 224.7 213.3 284.7 259.8 237.9 235.2 293.4 267.0 250.2 250.5 75 SHC 129.6 162.0 193.8 213.3 146.1 188.1 228.6 235.2 161.7 211.8 250.2 250.5 kw 15.51 15.12 14.76 14.58 15.75 15.36 15.00 14.97 15.90 15.48 15.21 15.21 TC 261.3 237.9 217.2 207.0 274.2 250.2 229.2 228.0 282.0 257.1 242.1 242.7 85 SHC 125.7 158.1 190.2 207.0 141.9 184.5 223.8 228.0 157.2 207.6 242.1 242.7 kw 17.40 16.95 16.56 16.38 17.67 17.22 16.83 16.80 17.82 17.37 17.07 17.10 TC 251.7 229.5 209.1 201.3 263.4 240.0 221.4 220.8 270.3 246.9 234.6 234.6 12,000 95 SHC 122.4 154.5 186.3 201.3 138.3 180.0 219.3 220.8 152.4 204.0 234.6 234.6 kw 19.41 18.93 18.48 18.30 19.71 19.20 18.78 18.75 19.86 19.35 19.08 19.08 TC 241.5 220.2 200.4 194.4 252.3 230.1 213.3 213.3 258.9 236.4 225.9 225.9 105 SHC 118.8 151.2 182.4 194.4 134.4 175.8 213.3 213.3 149.7 199.8 225.9 225.9 kw 21.57 21.03 20.52 20.34 21.84 21.30 20.88 20.88 22.05 21.48 21.24 21.21 TC 231.3 210.9 192.0 187.5 240.9 219.9 205.2 205.2 246.9 225.9 217.5 217.8 115 SHC 114.3 147.0 178.8 187.5 130.5 172.5 205.5 205.2 145.2 196.2 217.5 217.8 kw 23.85 23.25 22.68 22.53 24.15 23.55 23.10 23.10 24.33 23.76 23.52 23.52 LEGEND BF Bypass Factor Ewb Entering Wet-Bulb kw Compressor Motor Power Input (kilowatts) SHC Sensible Heat Cap. (1000 Btuh) TC Total Cap. (1000 Btuh) Gross 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. SHC correction table 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. BYPASS FACTOR (BF) ENTERING AIR DRY-BULB TEMP (F) 79 78 77 76 75 under 75 81 82 83 84 85 over 85 Correction Factor.05 1.045 2.09 3.14 4.18 5.23.10.98 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 Use formula shown below. Correction Factor = 1.10 x (1 BF) x (edb 80). 4. The following formulas may be used. sensible capacity (Btuh) t ldb = tedb 1.10 x cfm t lwb = Wet-bulb temperature corresponding to enthalpy of air leaving evaporator coil (h). total capacity (Btuh) h lwb = hewb 4.5 x cfm Where: h = Enthalpy of air entering evaporator coil. 11

Performance data (cont) ACCESSORY HEATING COIL CAPACITIES UNIT 50BYN 006 008 012 014 016 024 STEAM DISTRIBUTING COIL* HOT WATER COIL CFM TC LAT Air P TC LAT (Btuh) (F) (in. wg) (Btuh) (F) GPM Water P Air P (Psig) (in. wg) 1,500 116 130 0.04 101 120 10 3.7 0.04 2,000 134 120 0.05 117 112 12 4.6 0.05 2,500 147 115 0.08 131 107 13 5.8 0.08 2,250 97 100 0.02 172 131 17 3.5 0.04 3,000 118 96 0.04 211 125 21 4.6 0.08 3,750 132 93 0.06 239 119 24 5.5 0.12 3,000 118 96 0.04 211 125 21 4.6 0.08 4,000 137 92 0.07 247 117 25 4.8 0.14 5,000 153 88 0.10 276 111 28 6.8 0.21 3,600 164 99 0.04 243 120 24 5.0 0.08 4,800 177 92 0.06 292 114 29 6.0 0.14 6,000 231 91 0.08 323 107 32 7.1 0.21 4,500 209 102 0.05 307 122 30 5.1 0.01 6,000 234 95 0.07 363 115 36 6.2 0.16 7,500 256 91 0.09 396 108 39 7.4 0.23 6,000 209 92 0.01 410 126 41 2.4 0.05 8,000 246 88 0.02 500 118 50 3.5 0.08 10,000 272 85 0.03 580 114 58 3.9 0.11 LEGEND LAT Leaving Air Temperature (F) TC Total Heating Capacity (1000 Btuh) P Pressure Drop *Steam distributing coil 1 row, ratings based on 2 psig steam, 60 F entering air. Hot water coil 2 row, ratings based on 200 F entering water temperature, 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 the proper value from the Heating Capacity Correction Factor table. 4. Formulas: Leaving Air Temperature LAT = edb (F) + (TC Btuh/1.1 x cfm]) Gpm = TC (Btuh) (500 x T 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 nearby heating coil. Since units normally require a low pressure switch cut-out setting at about 27 F, use of a freeze-up thermostat is recommended if heating coil is not drained or filled with an antifreeze solution. 6. Field supplied thermostat and control valve are required when using accessory heating coils. HEATING CAPACITY FACTORS STEAM COIL Steam Entering Air Temperature (F) Pressure Psig 40 50 60 70 80 0 1.11 1.03 0.96 0.89 0.82 2 1.14 1.07 1.00 0.93 0.86 5 1.19 1.11 1.05 0.98 0.91 10 1.25 1.18 1.11 1.04 0.97 Water Temp (F) Drop 10 20 30 HOT WATER COIL Entering Entering Air Temperature (F) Water Temp (F) 40 50 60 70 80 180 1.06 0.98 0.90 0.83 0.75 200 1.22 1.15 1.07 1.00 0.92 220 1.39 1.32 1.24 1.17 1.09 180 0.98 0.91 0.83 0.75 0.68 200 1.15 1.08 1.00 0.93 0.85 220 1.32 1.25 1.17 1.10 1.02 180 0.91 0.83 0.76 0.68 0.60 200 1.08 1.00 0.93 0.85 0.78 220 1.25 1.18 1.10 1.03 0.95 12

CONDENSER FAN PERFORMANCE 50BYN 006 008 012 014 016 024 Bhp STATIC PRESSURE (in. wg) Cfm 0.0 0.2 0.4 0.6 0.8 1.0 Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp 2,000 566 0.18 710 0.30 846 0.40 972 0.46 1070 0.61 1130 0.72 2,500 753 0.40 880 0.59 927 0.63 1020 0.79 1105 1.10 1184 1.35 3,000 940 0.83 985 0.90 1080 1.00 1122 1.10 1200 1.29 1320 1.46 3,500 1047 1.20 1140 1.47 1173 1.50 1250 1.70 1292 1.40 1360 1.59 4,000 1250 1.94 1257 2.00 1333 2.10 1390 2.41 1410 2.60 1470 2.76 3,000 547 0.30 670 0.54 751 0.60 840 0.80 920 1.10 995 1.50 3,750 760 0.89 824 1.10 920 1.25 964 1.30 1040 1.53 1110 2.10 4,500 910 1.53 940 1.70 1020 1.90 1090 2.08 1173 2.40 1240 2.59 5,250 1020 2.00 1095 2.40 1170 2.90 1180 3.00 1240 3.10 1300 3.53 6,000 1180 3.10 1195 3.20 1260 3.70 1320 4.16 1380 4.80 1440 5.60 4,000 665 0.40 803 0.65 920 0.97 989 1.20 1080 1.48 1163 1.90 5,000 830 0.82 912 1.20 1010 1.55 1088 1.70 1170 2.00 1246 2.50 6,000 976 1.70 1070 2.16 1131 2.30 1210 2.66 1318 2.90 1390 3.36 7,000 1120 2.85 1198 3.00 1273 3.20 1343 3.70 1410 4.21 1474 4.90 8,000 1282 3.90 1353 4.50 1420 5.06 1517 5.30 1580 5.93 1640 6.70 4,800 703 0.62 840 1.05 860 1.10 950 1.29 1090 1.62 1172 2.02 6,000 853 1.12 902 1.60 1060 2.10 1130 2.30 1210 2.66 1290 3.20 7,200 1045 2.40 1140 3.00 1191 3.20 1270 3.62 1290 3.79 1357 4.60 8,400 1190 3.60 1270 4.20 1340 4.89 1421 5.10 1490 5.85 1560 6.70 9,600 1380 5.70 1452 6.50 1520 7.13 1550 7.20 1611 7.50 1670 8.23 6,000 600 0.60 720 1.02 820 1.51 910 2.10 950 2.20 1025 2.80 7,500 736 1.50 833 1.86 920 2.50 1015 2.80 1040 3.08 1106 3.80 9,000 942 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 8.50 12,000 1230 7.10 1310 8.20 1350 8.96 1410 9.20 1465 9.80 1470 10.10 8,000 560 1.68 640 2.04 705 2.40 770 3.00 850 3.60 920 3.98 10,000 710 3.36 760 3.72 820 4.20 870 4.80 930 5.40 975 6.00 12,000 845 5.28 890 5.70 945 6.20 975 6.71 1025 7.26 1090 7.70 14,000 960 8.14 1020 8.80 1076 9.24 1090 9.90 1125 10.50 1150 11.00 16,000 1090 11.60 1150 12.50 1190 12.80 1200 13.20 1230 13.70 1250 14.00 LEGEND Brake Horsepower Shaded areas require field-supplied drive. 13

Performance data (cont) EVAPORATOR FAN PERFORMANCE CFM EXTERNAL STATIC PRESSURE (in. wg) 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 50BYN006 1500 Rpm 690 860 978 1100 1210 1310 1400 Bhp 0.20 0.30 0.35 0.47 0.44 0.56 0.69 1750 Rpm 800 950 1080 1140 1240 1340 1430 Bhp 0.22 0.36 0.53 0.60 0.68 0.90 1.10 2000 Rpm 953 1090 1140 1240 1340 1430 1520 Bhp 0.44 0.61 0.65 0.80 0.86 1.04 1.23 2250 Rpm 1040 1160 1270 1340 1430 1480 1550 Bhp 0.58 0.80 0.97 1.10 1.23 1.30 1.33 2500 Rpm 1209 1324 1430 1460 1550 1640 1720 Bhp 0.84 1.10 0.38 1.40 1.56 1.85 2.13 50BYN008 2250 Rpm 683 827 950 980 1100 1130 1180 Bhp 0.24 0.43 0.66 0.73 0.76 0.83 0.94 2625 Rpm 845 980 990 1100 1150 1220 1320 Bhp 0.57 0.83 0.88 1.03 1.18 1.23 1.32 3000 Rpm 930 1046 1150 1210 1270 1340 1500 Bhp 0.71 1.01 1.34 1.37 1.59 1.64 1.94 3375 Rpm 1060 1172 1270 1350 1380 1400 1505 Bhp 1.07 1.42 1.81 1.91 2.04 2.13 2.29 3750 Rpm 1250 1350 1370 1390 1440 1520 1550 Bhp 1.72 2.10 2.27 2.37 2.63 2.70 2.89 50BYN012 3000 Rpm 710 790 870 930 980 1060 1100 1180 1240 1290 1390 1400 Bhp 0.66 0.77 0.91 0.97 1.14 1.23 1.38 1.44 1.67 1.88 2.04 1.99 3500 Rpm 720 820 920 920 1050 1120 1190 1240 1280 1320 1400 1410 Bhp 0.70 0.86 1.21 1.40 1.65 1.69 1.98 1.98 2.17 2.33 2.50 2.45 4000 Rpm 852 960 1050 1090 1180 1200 1240 1320 1330 1440 1410 1420 Bhp 0.95 1.35 1.80 2.02 2.28 2.40 2.30 2.60 2.70 2.80 2.90 2.96 4500 Rpm 946 1042 1130 1210 1220 1320 1330 1340 1420 1430 1500 1550 Bhp 1.32 1.76 2.25 2.76 2.83 3.10 3.20 3.34 3.45 3.53 4.07 4.49 5000 Rpm 1040 1125 1205 1280 1320 1340 1430 1470 1500 1520 1580 1610 Bhp 1.75 2.22 2.73 3.21 3.40 3.75 3.97 4.41 4.68 4.87 4.76 5.03 LEGEND Bhp Brake Horsepower NOTES: 1. Shaded areas require field-supplied drive. 2. Italics require field-supplied motor. 14

3,600 4,200 4,800 5,400 6,000 4,500 5,250 6,000 6,750 7,500 6,000 7,000 8,000 9,000 10,000 CFM EVAPORATOR FAN PERFORMANCE (cont) EXTERNAL STATIC PRESSURE (in. wg) 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 50BYN014 Rpm 580 640 710 780 845 910 975 1040 1080 1130 1180 1280 Bhp 0.67 0.80 0.94 1.06 1.25 1.49 1.63 1.76 1.97 2.30 2.50 2.70 Rpm 670 730 760 900 915 935 1040 1050 1100 1150 1215 1285 Bhp 1.03 1.18 1.40 1.63 1.72 1.83 2.13 2.20 2.34 2.70 2.80 3.30 Rpm 760 840 850 930 940 1035 1060 1090 1130 1205 1280 1330 Bhp 1.50 1.79 1.86 2.12 2.15 2.48 2.67 2.80 2.95 3.30 3.70 3.80 Rpm 850 880 955 1005 1050 1060 1115 1160 1205 1270 1340 1360 Bhp 2.10 2.40 2.64 2.87 3.05 3.14 3.40 3.70 3.92 4.35 4.56 4.76 Rpm 955 980 1035 1060 1110 1150 1170 1220 1240 1285 1360 1380 Bhp 2.98 3.22 3.35 3.60 3.80 4.00 4.22 4.40 4.60 4.75 5.60 5.80 50BYN016 Rpm 676 840 970 940 1037 1092 1170 1251 1320 1370 1432 1462 Bhp 0.60 1.04 1.35 1.50 1.60 1.72 1.80 1.85 1.90 2.54 2.90 3.20 Rpm 731 865 980 1083 1100 1180 1210 1280 1370 1434 1490 1550 Bhp 0.80 1.20 1.65 2.00 2.20 2.35 2.47 2.70 2.98 3.42 3.50 3.67 Rpm 891 1020 1134 1140 1217 1240 1313 1327 1400 1450 1514 1580 Bhp 1.44 2.16 2.80 2.90 3.00 3.18 3.40 3.50 3.70 4.25 4.50 4.80 Rpm 950 1060 1160 1240 1280 1350 1390 1450 1514 1540 1590 1640 Bhp 1.80 2.50 3.18 3.70 3.80 4.10 4.30 4.70 5.10 5.30 5.90 6.30 Rpm 1060 1160 1290 1330 1350 1420 1488 1540 1600 1650 1707 1760 Bhp 2.50 3.27 4.37 4.50 4.70 5.02 5.40 5.68 6.20 6.50 6.90 7.40 50BYN024 Rpm 670 786 890 915 990 1090 1120 1180 1270 1310 1360 1470 Bhp 0.85 1.32 1.92 2.10 2.31 2.64 2.86 3.30 3.49 4.00 4.30 4.60 Rpm 820 930 980 1035 1070 1140 1225 1270 1290 1330 1380 1480 Bhp 1.75 2.46 2.60 3.01 3.40 3.52 4.00 4.30 4.50 4.80 5.30 5.66 Rpm 980 1033 1080 1150 1170 1250 1290 1310 1365 1410 1460 1522 Bhp 3.30 3.50 3.65 4.13 4.35 5.00 5.20 5.35 5.90 6.30 6.64 7.20 Rpm 1105 1120 1200 1240 1300 1330 1385 1430 1460 1510 1590 1620 Bhp 4.80 4.90 5.20 5.40 6.20 6.40 7.00 7.20 7.50 8.30 9.26 10.40 Rpm 1230 1250 1320 1326 1390 1415 1460 1515 1530 1580 1625 Bhp 6.00 6.80 7.03 6.80 7.80 8.20 8.46 9.45 9.70 10.50 10.90 LEGEND Bhp Brake Horsepower NOTES: 1. Shaded areas require field-supplied drive. 2. Italics require field-supplied motor. 15

Electrical data UNIT 50BYN 006 008 012 014 016 024 V-PH-Hz VOLTAGE RANGE COMPRESSOR NO. 1 COMPRESSOR NO. 2 COMPRESSOR NO. 3 CONDENSER FAN INDOOR-FAN MOTOR POWER SUPPLY* Min Max RLA LRA RLA LRA RLA FLA Hp FLA Hp FLA MCA MOCP 208/230-3-60 187 253 18.3 125 2.0 7.5 1.5 6.6 37.0 50 460-3-60 414 506 9.2 67 2.0 3.4 1.5 3.0 17.8 25 575-3-60 518 632 7.3 27 2.0 2.7 1.5 2.4 14.3 20 208/230-3-60 187 253 20.4 146 3.0 10.6 2.0 7.5 43.6 60 460-3-60 414 506 10.2 73 3.0 4.8 2.0 3.4 21.0 30 575-3-60 518 632 8.2 50 3.0 3.9 2.0 2.7 16.8 20 208/230-3-60 187 253 17.7 125 17.7 125 5.0 16.7 3.0 10.6 67.1 80 460-3-60 414 506 8.9 67 8.9 67 5.0 7.6 3.0 4.8 32.3 40 575-3-60 518 632 7.1 27 7.1 27 5.0 6.1 3.0 3.9 25.9 30 208/230-3-60 187 253 17.7 125 20.9 146 5.0 16.7 5.0 16.7 76.4 90 460-3-60 414 506 8.9 67 10.5 73 5.0 7.6 5.0 7.6 36.7 45 575-3-60 518 632 7.1 27 8.4 50 5.0 6.1 5.0 6.1 29.4 35 208/230-3-60 187 253 20.9 146 20.9 146 5.0 16.7 5.0 16.7 80.4 100 460-3-60 414 506 10.5 73 10.5 73 5.0 7.6 5.0 7.6 38.7 45 575-3-60 518 632 8.4 50 8.4 50 5.0 6.1 5.0 6.1 31.0 35 208/230-3-60 187 253 20.9 146 20.9 146 20.1 146 7.5 24.2 7.5 24.2 116.8 125 460-3-60 414 506 10.5 73 9.9 73 9.5 73 7.5 11.0 7.5 11.0 56.0 60 575-3-60 518 632 8.4 50 8.4 50 8.4 50 7.5 9.0 7.5 9.0 45.2 50 LEGEND FLA Full Load Amps LRA Locked Rotor Amps MCA Minimum Circuit Amps MOCP Maximum Overcurrent Protective Device (see Note 1) NEC National Electrical Code RLA Rated Load Amps *Minimum Ckt Amps and MOCP Amps values per NEC (see Note 1). The overcurrent protective device for the unit shall be fuse or HACR circuit breaker (see Note 1). NOTES: 1. In compliance with NEC requirements for multimotor and combination load equipment (NEC Articles 430 and 440), the overcurrent protective 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 plus 100% 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. 16

Typical wiring schematic, 50BYN units 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 194 F (90 C) when replacing factory wiring. 4. Use copper conductors only. 5. Wiring for field power supply must be rated at 165 F (75 C) minimum. C Compressor Contactor CB Circuit Breaker CLO Compressor Lockout CR Control Relay EQUIP Equipment GND Ground HPS High-Pressure Switch IFC Indoor-Fan Contactor IFM Indoor-Fan Motor IFP Indoor-Fan Protector LPS Low-Pressure Switch NEC National Electrical Code OFC Outdoor-Fan Contactor OFM Outdoor-Fan Motor OFP Outdoor-Fan Protector LEGEND TB Terminal Block TDR Time Delay Relay TRAN Transformer Terminal Block Connection Marked Terminal Unmarked Terminal Splice Factory Wiring Field Control Wiring 17

Controls Operating sequence All units require the addition of a thermostat accessory package to complete the control circuit. The sequence of operation may vary depending on which package is selected. Room-mounted thermostat The unit uses an electronic, communicating electronic, or mechanical thermostat mounted in the conditioned space. Fan circulation When the thermostat selector switch is set to the FAN position, the evaporator-fan motor will operate to provide air circulation. Cooling The evaporator will operate continuously or when the compressor runs, depending on the setting of the thermostat fan selector switch. When the thermostat closes (on a call for cooling), the control relay outdoor-fan contactor and compressor contactor(s) close. The control relay will start the indoor fan if it is not already running. The condenser fan contactor will start the condenser air fan and the compressor contactors will immediately start the compressor(s). The 50BYN024 unit as wired from the factory has two compressors on first stage and one on second stage; this may be changed (see application section of this product data). A second stage on 50BYN012 to 024 units will close if additional cooling demand is required, and will start the second-stage compressor. When the thermostat is satisfied, the second stage compressor will stop first, and then the first stage compressors will stop when cooling demand is satisfied. The condenser will also stop as soon as the first stage cooling is satisfied. Low ambient control on 50BYN units is accomplished with a refrigerant operated damper located on the condenser fan discharge. Low ambient operation does not affect operating sequence. A 5-minute timer (TDR [Time Delay Relay]) will prevent the compressor(s) from restarting for 5 minutes after any compressor has stopped. Heating The evaporator fan will operate continuously or when the compressor runs, depending on the setting of the thermostat fan selector switch. When the thermostat closes (on a call for heating), the thermostat activates the water or steam control valve to meet heating requirements. Carrier TEMP System thermostat The Carrier TEMP System thermostat works like a room thermostat, but provides for communicating control. The TEMP thermostat requires the addition of an accessory relay pack to interface with the unit. This relay pack may be mounted in the lowvoltage control compartment. The system operation is the same as stated in the Room-Mounted Thermostat section. All units The control circuit incorporates a currentsensing lockout relay (Cycle-LOC device) that locks off the compressor(s) when any safety device is activated (low- or high-pressure switches, condenser-fan motor overload or compressor internal overload). If any compressor safety device opens, the compressor(s) will stop and a 24-v signal will be sent to the X connection of the low-voltage terminal strip. The signal may be used to light an indicator light on the unit. Since the unit is protected by the Cycle-LOC device, the compressor(s) will not restart following a safety interruption unless the thermostat is satisfied without cooling operation. To reset the Cycle-LOC control device, manually turn the control power to the OFF, then back to the ON position. High- and low-pressure switches and motor overload protectors will reset automatically when the condition which caused device to trip has dropped below the reset condition. 18

Typical piping and wiring LEGEND Condenser Airflow Evaporator Airflow Power Wiring Control Wiring *NEC National Electrical Code 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 System Design Manual Part 3 for details. 4. Connect drain to building waste system and provide a trap of sufficient depth for unit static. 19

Application data Location For best results unit must be properly located and installed. Selected location should not be adjacent to an acoustically sensitive space, for example a conference room or executive office. The best location is in mechanical rooms in areas like elevators, restrooms, stairways, or similar spaces. The mechanical room should use construction methods which will help isolate the transmission of acoustical energy. Since these units typically use large quantities of ducted condenser air, select a location with the best access to outside window or wall to accommodate condenser air louver. Locate the unit as close to the wall opening as possible but allow space for return air inlet and access to the evaporator and condenser coil for cleaning. Units on the same floor should have a minimum of 6 feet between units to prevent recirculation of condenser air. Units floor to floor should have a minimum of 10 feet between units to prevent recirculation. Units should not be located with several units pulling condenser air from a small space between buildings, which may be recirculated. Recirculation of condenser air will result in increased head pressure which may cause units to trip on high pressure. There are several methods for applying 50BYN units in different space applications. See page 23 for recommended equipment room applications and locations of key components. Moving units into existing buildings Carrier s 50BYN units are designed to pass through most 36-in. door openings. The filter rack and duct mounting flanges may also be removed. The height of the 20 ton unit exceed some door openings, see section on splitting the 20 ton unit. Unit mounting stand When units are mounted to use a existing window height, a field-supplied steel mounting stand is recommended. The stand should be built rigid enough to support the weight of the unit and braced to prevent any side to side movement of the stand. A mounting height higher than the window sill height is recommended, which allows the condenser duct to be pitched back to the louver in the window for rain elimination and drainage. Unit isolation Unit compressors are internally isolated and the compressor compartment is lined with acoustical insulation. If additional vibration isolation is desired, rubber in shear pads are recommended under the four corners of the unit. Spring isolation is not recommended. All duct connections to the unit should be made with flexible connections to prevent any transmission of vibration of the ductwork. Accessories Condenser air filters are recommended on the condenser air inlet to prevent build up of dirt and debris, which are pulled in with the condenser air and can plug the coil. This filter will reduce the need to clean the condenser coil. See page 23 for recommended location of condenser air filters. Outside air connections and air economizer Outdoor ventilation air is required for most spaces and the use of an outdoor economizer cycle can save cooling energy. Carrier s 50BYN units can be applied with ventilation control options, including CO2 activated ventilation or differential economizer. Several methods of bringing the air into the unit are possible. A mixing box with dampers to control outdoor and return air is the best method. A mixing box assures adequate mixing of both air streams. When an integrated economizer cycle (compressors can operate with full outdoor air) is used, it is recommended that an evaporator defrost thermostat be put in the unit. This control will turn off the compressors when frost begins to form on the evaporator coil. Heating coils Accessory steam and hot water coils are mounted in the unit return air before the cooling coil. The filter rack provided with the unit is removed, the coil mounted in the same position and the filter rack reattached to the coil. The same filter rack may be used with ducted or free return. Care must be exercised in location of outside ventilation or economizer air in to the unit when heating coils are used to prevent coil freeze up. Make sure adequate mixing of return and outside air is provided to prevent below freezing temperatures at any point of the coil. Also be sure that dampers close off outdoor air during unit shutdown. Spring return outdoor air dampers are recommended. Discharge plenum When unit is to be used directly in the space to be conditioned without ductwork attached, a discharge plenum with acoustical lining and a discharge grille on the unit are recommended. It is recommended that the fan be slowed down to deliver no more than nominal cfm for best acoustical performance. Condenser air filter racks, mixing boxes with outdoor air dampers and economizers, and discharge plenums may be field fabricated or are available through specialty accessory manufacturers. 20