Product Data. Features/Benefits. 50TJ Single-Package Rooftop Units Electric Cooling with Electric Heat Option 50 Hz, CE Units

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1 Product Data 50TJ Single-Package Rooftop Units Electric Cooling with Electric Heat Option 50 Hz, CE Units Nominal Capacity: 21.5 kw to 35.9 kw (6.1 to 10.2 Tons) Single-Package Rooftop Units with: European Community (CE) design Galvanized steel cabinet with Carrier Weather Armor coating Fifty-one mm (2-in.) return-air filters Commercial strength base rails Exclusive tool-less filter access panel Corrosion-resistant sloped condensate pan Single power entry to unit Commercial duty motors with permanently lubricated bearings Standard cooling operation at outdoor ambient temperatures as low as 4 C (25 F) Meets ASHRAE Standard 62 (U.S.A.) for Indoor-Air Quality (IAQ) Features/Benefits Compact, vertical discharge units convert to horizontal discharge, combining installation flexibility with efficient performance and easy maintenance. Easy installation and conversion All units are shipped in the vertical discharge configuration for fit-up to standard roof curbs. The contractor can order and install the roof curb early in the construction stage, before decisions on size requirements are made. All units feature roll-formed baserail design with forklift slots on all 3 sides and rigging holes for easier maneuvering. Durable packaging protects all units during shipment and storage. Copyright 1995 Carrier Corporation Form 50TJ-C4PD

2 The units can be easily converted from a vertical to a horizontal discharge configuration by interchanging the panels supplied with the unit. All units feature a non-corrosive sloped condensate drain pan in accordance with ASHRAE (American Society of Heating, Refrigeration and Air Conditioning Engineers) Standard 62. Also, the new, sloped condensate pan permits either an external side condensate drain (outside the roof curb) or an internal bottom drain (inside the roof curb). Both options require an external, field-supplied P-trap. Plus, the condenser coil grille (available as a field-installed accessory) provides a metal plate as an alternate location for the fieldsupplied disconnect, if desired. In addition, the 50TJ units have a standard filter access door, which permits tool-less filter changes and provides an opening for outdoor air options and accessories. Field-installed electric heaters are available in a wide range of capacities. Single point wiring kit makes installation simple. Simple electrical connections Terminal boards, located in the base unit control box, facilitate connections to room thermostat, outdoor thermostat(s), economizer, and electric heat. Service panels are quickly removed, permitting easy servicing. Thru-the-bottom service connection capability allows power and control wiring to be routed through the unit basepan, minimizing roof penetrations. Both power and control connections are made on the same side of the unit to simplify installation. Proven compressor reliability Design techniques feature computerprogrammed balance between compressor, condenser, and evaporator. Carrierspecified hermetic compressors are equipped with compressor overcurrent and overtemperature protection to ensure dependability. Carrier s exclusive Acutrol metering device precisely controls refrigerant flow, preventing slugging and flood-back, while maintaining optimum unit performance. Durable, dependable construction Designed for durability in any climate, the weather-resistant cabinets are manufactured using Carrier Weather Armor coating. The cabinet is constructed of galvanized steel, is bonderized, and all exterior panels are coated with a prepainted baked enamel finish. The paint finish is non-chalking, and is capable of withstanding Federal (U.S.A.) Test Method Standard No. 141 (Method 6061) 500-hour salt spray test. All internal cabinet panels are primed, permitting longer life and a more attractive appearance for the entire unit. In addition, the 50TJ units are designed with a single, continuous top piece to eliminate any possible leaks. Totally-enclosed condenser-fan motors and permanentlylubricated bearings provide additional unit dependability. Integrated economizers and outdoor air During a first stage call for cooling, if the outdoor-air temperature is below the control set point, the leaving-air sensor modulates the economizer outdoor-air damper open to achieve the set point. When second-stage cooling is called for, the compressor is energized in addition to the economizer. If the outdoor-air temperature is above the set point, the first stage of compression is activated and the economizer stays at minimum vent position. Economizer operation is controlled by Accusensor I dry-bulb thermostat that senses outdoor-air temperature. Accessory upgrade kits include solid-state enthalpy control and differential enthalpy sensor. The Durablade economizer has a reliable sliding plate damper which is easily adjusted for 100% outdoor air, 100% return air, or any proportions of mixed air. Quiet, efficient operation and dependable performance Compressors have vibration isolators for extremely quiet operation. Efficient fan and motor design permits operation at very low sound levels, and all units are mounted on independent mounting rails. Quiet and efficient operation is provided by belt-driven evaporator fans (standard). The belt-driven evaporator-fan motors allow adjustment to available static pressure to meet the job requirements of even the most demanding applications. Indoor-air quality begins with Carrier rooftops Sloped condensate pans minimize biological growth in rooftop units in accordance with ASHRAE Standard 62. Fifty-one mm (2-in.) filters with optional dirty filter indicator switch provide for greater particle reduction in the return air. The face-split evaporator coils improve the dehumidification capability of the standard units, and standard enthalpy controls provided with the optional or accessory economizers maximize building humidity control. The units also have an accessory, 100% open, two-position damper to meet all your fresh outdoor air requirements. For units without economizer, yearround ventilation is enhanced by a manual outdoor-air damper (ordered as an accessory). The damper can be preset to admit up to 25% outdoor air. Euro-style control box Control box is designed in accordance with IEC (International Electrotechnical Commission) standards and complies with harmonized European Standard EN The control box is factory installed and features: single-color, specially routed wiring with supports fully shrouded terminal blocks for field power connection no sharp edges on wire paths earth bonding transformer which meets IEC742 EURO-STYLE CONTROL BOX 2

3 Table of contents Page Features/Benefits...1,2 Model Number Nomenclature...3 Physical Data...4,5 Options and Accessories...6,7 Base Unit Dimensions...8 Accessory Dimensions...9 Selection Procedure...10,11 Performance Data Electrical Data...26 Typical Piping and Wiring...27 Typical Wiring Schematic...28,29 Controls...30 Application Data...31 Guide Specifications Model number nomenclature Al Aluminum Cu Copper FIOP Factory-Installed Option *Refer to 50TJ Product Ordering Data or contact your local Carrier representative for 50TJ FIOP code table. All coils have copper tubes. Contact your local Carrier representative for more details regarding coil fin options B, C, D, and V. **50TJ only. 3

4 Physical data (SI) UNIT SIZE NOMINAL CAPACITY (kw) OPERATING WEIGHT (kg) Unit Al/Al* Economizer Roof Curb COMPRESSOR Hermetic Quantity Oil (ml) 1479 ea 1479 ea 1479 ea 1922 ea REFRIGERANT TYPE R-22 Operating Charge (kg) Circuit Circuit CONDENSER COIL Enhanced Copper Tubes, Aluminum Lanced Fins Rows...Fins/m Total Face Area (sq m) CONDENSER FAN Propeller Type Nominal L/s Quantity...Diameter (mm) Motor BkW...r/s EVAPORATOR COIL Enhanced Copper Tubes, Aluminum Double-Wavy Fins, Acutrol Feed Device Rows...Fins/m Total Face Area (sq m) EVAPORATOR FAN Centrifugal Type Quantity...Size (mm x mm) x x x x 381 Type Drive Belt Belt Belt Belt Nominal L/s Motor kw Maximum Continuous BkW Motor Frame Size Fan r/s Range Motor Bearing Type Ball Ball Ball Ball Maximum Allowable r/s Motor Pulley Pitch Diameter Min/Max (mm) 61/86 61/86 86/ /127 Nominal Motor Shaft Diameter (mm) Fan Pulley Pitch Diameter (mm) Nominal Fan Shaft Diameter (mm) Belt, Quantity...Type...Length (mm) 1...A A A A Pulley Center Line Distance (mm) Speed Change per Full Turn of Movable Pulley Flange (r/s) Movable Pulley Maximum Full Turns From Closed Position Factory Setting Factory Speed Setting (r/s) Fan Shaft Diameter at Pulley (mm) HIGH-PRESSURE SWITCH (kpa)** Standard Compressor Internal Relief (Differential) 3103 ± ± 345 Cutout 2951 Reset (Auto.) 2206 LOW-PRESSURE SWITCH (kpa)** Cutout 48±21 Reset (Auto.) 152±48 FREEZE PROTECTION THERMOSTAT** Opens (C) 1 Closes (C) 7 OUTDOOR-AIR INLET SCREENS Cleanable Quantity...Size (mm) x 635 x x 635 x 25 RETURN-AIR FILTERS Throwaway Quantity...Size (mm) x 508 x x 508 x x 508 x x 508 x 51 Al Aluminum Bhp Brake Horsepower BkW Fan Input Watts x Motor Efficiency Cu Copper *Evaporator coil fins/condenser coil fins. Weight of 356 mm roof curb. **Requires the accessory/optional Controls Upgrade Kit. NOTE: The 50TJ units have a loss-of-charge/low-pressure switch (accessory/option) located in the liquid line. 4

5 Physical data (English) UNIT SIZE NOMINAL CAPACITY (tons) OPERATING WEIGHT (lb) Unit Al/Al* Economizer Roof Curb COMPRESSOR Hermetic Quantity Oil (oz) 50 ea 50 ea 50 ea 65 ea REFRIGERANT TYPE R-22 Operating Charge (lb-oz) Circuit Circuit CONDENSER COIL Enhanced Copper Tubes, Aluminum Lanced Fins Rows...Fins/in Total Face Area (sq ft) CONDENSER FAN Propeller Type Nominal Cfm Quantity...Diameter (in.) Motor Hp...Rpm EVAPORATOR COIL Enhanced Copper Tubes, Aluminum Double-Wavy Fins, Acutrol Feed Device Rows...Fins/in Total Face Area (sq ft) EVAPORATOR FAN Centrifugal Type Quantity...Size (in.) x x x x 15 Type Drive Belt Belt Belt Belt Nominal Cfm Motor Hp Maximum Continuous Bhp Motor Frame Size Fan Rpm Range Motor Bearing Type Ball Ball Ball Ball Maximum Allowable Rpm Motor Pulley Pitch Diameter Min/Max (in.) 2.4/ / / /5.0 Nominal Motor Shaft Diameter (in.) Fan Pulley Pitch Diameter (in.) Nominal Fan Shaft Diameter (in.) Belt, Quantity...Type...Length (in.) 1...A A A A...51 Pulley Center Line Distance (in.) Speed Change per Full Turn of Movable Pulley Flange (rpm) Movable Pulley Maximum Full Turns From Closed Position Factory Setting Factory Speed Setting (rpm) Fan Shaft Diameter at Pulley (in.) HIGH-PRESSURE SWITCH (psig)** Standard Compressor Internal Relief Differential) 450±50 500±50 Cutout 428 Reset (Auto.) 320 LOW-PRESSURE SWITCH (psig)** Cutout 7±3 Reset (Auto.) 22±7 FREEZE PROTECTION THERMOSTAT** Opens 30±5 Closes 45±5 OUTDOOR-AIR INLET SCREENS Cleanable Quantity...Size (in.) x 25 x x 25 x 1 RETURN-AIR FILTERS Throwaway Quantity...Size (in.) x 20 x x 20 x x 20 x x 20 x 2 Al Aluminum Bhp Brake Horsepower BkW Fan Input Watts x Motor Efficiency Cu Copper *Evaporator coil fins/condenser coil fins. Requires the accessory/optional Controls Upgrade Kit. **Weight of 14-in. roof curb. NOTE: The 50TJ units have a loss-of-charge/low-pressure switch (accessory/option) located in the liquid line. 5

6 Options and accessories ITEM OPTION* ACCESSORY Unit-Mounted Disconnect X Durablade Integrated Economizer (Includes Hood) X X Manual Outdoor-Air Damper X Controls Upgrade Kit X** X Condenser Coil Grille X Electric Heat X 25% Open Two-Position Damper X 100% Open Two-Position Damper X Roof Curbs (Vertical and Horizontal Discharge) X Remote Control Panel X Thermostats and Subbases X Time Guard II Control Circuit X Thru-the-Bottom Service Connections X Accusensor II Enthalpy Control X Accusensor III Enthalpy Sensor X Condenser Coil Hail Guard Assembly X Fan/Filter Status X Salt Spray Protection Grille X *Factory installed. Field installed. **Includes high pressure, loss-of-charge/low pressure, and freeze protection switches. HAIL GUARD AND CONDENSER COIL SALT-SPRAY PROTECTION THERMOSTAT Zone thermostat (24 v) provides one- or 2-stage cooling for control of unit. Matching subbases are available with or without tamperproof switches and automatic changeover. COIL GUARD GRILLE Condenser coil hail guard accessory protects coil against damage from hail and other flying debris. Condenser coil salt spray protection accessory protects coils from salt spray induced corrosion in coastal areas, and utilizes a cleanable filter. Coil guard grille protects coils against large objects and vandalism. 6

7 OUTDOOR TEMP. F 55 S OPEN 1 3 T T1 B C D TR P P1 DAMPER OPEN DAMPER CLOSED D C B A OR UNPOWERED STATE CW SETPOINTS CCW VAC ACCUSENSOR II ACCUSENSOR III % H U M I D I T Y MINIMUM POSITION RUSH AT 24VAC 3 ma MIN. AT 11 VDC CONTACT RATINGS: 1.5A RUN, 3.5A IN CONTACTS SHOWN IN HIGH ENTHALPY TR TR1 ENTHALPY CONTROL SO REV. B A + Accusensor economizer controls help provide efficient, economical economizer operation. The Accusensor I dry-bulb sensor measures outdoor temperature and is standard with the economizer. The accessory Accusensor II solid-state enthalpy control senses both dry and wet bulb of the outdoor air to provide an accurate enthalpy reading. Accusensor II is available as a field-installed accessory for the economizer. The accessory Accusensor III differential enthalpy sensor compares outdoor temperature and humidity to returnair temperature and humidity and determines the most economical mixture of air. Accusensor III is available as a field-installed accessory for the economizers REV UNIT MOUNTED DISCONNECT TIME GUARD II CONTROL Time Guard II Control automatically prevents compressor from restarting for at least 5 minutes after a shutdown. Field-installed accessory prevents short cycling of compressor if thermostat is rapidly changed. Time Guard II device mounts in the control compartment of unit. DURABLADE ECONOMIZER Factory-installed, internally-mounted, NEC and UL (U.S.A. Standards) approved non-fused switch provides unit power shutoff and disconnect lockout protection capability. The switch is accessible from outside the unit. ELECTRIC HEATER Electric heaters are available in a wide range of capacities for field installation. Exclusive Durablade economizer damper design saves energy while providing economical and reliable cooling. A sliding plate on the face of the economizer controls the amount of outdoor air entering the system. When the sliding plate is closed, it provides a leakproof seal which prevents ambient air from seeping in or conditioned air from seeping out. It can be easily adjusted for 100% outdoor air or any proportion of mixed air. 7

8 Base unit dimensions STD UNIT WEIGHT CORNER WEIGHT (A) CORNER WEIGHT (B) CORNER WEIGHT (C) CORNER WEIGHT (D) UNIT H J K 50TJ Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg Ft-in. mm Ft-in. mm Ft-in. mm A B C D E F CONNECTION SIZES dia [35] field power supply hole dia [64] power supply knockout dia [44] charging port hole 7 8 [22] field control wiring hole NPT condensate drain 2 dia [51] power supply knockout BOTTOM POWER CHART: THESE HOLES REQUIRED FOR USE WITH ACCESSORY PACKAGES CRBTMPWR001A00 ( 1 2, 3 4 ) OR CRBTMPWR002A00 ( 1 2, ) THREADED CONDUIT SIZE WIRE USE REQ D HOLE SIZES (MAX.) v 7 8 [22.2] 3 4 POWER* [28.4] POWER* [44.4] *Select either 3 4 or for power, depending on wire size. 1. Dimensions in [ ] are in millimeters. 2. Center of gravity. 3. Direction of airflow. 4. Ductwork to be attached to accessory roof curb only. 5. Minimum clearance (local codes or jurisdiction may prevail): a. Bottom to combustible surfaces (when not using curb) 0 inches. On horizontal discharge units with electric heat 1 in. clearance to ductwork for 1 ft. b. Condenser coil, for proper airflow, 36 in. one side, 12 in. the other. The side getting the greater clearance is optional. c. Overhead, 60 in. to assure proper condenser fan operation. d. Horizontal supply and return end, 0 inches. 6. With the exception of the clearance for the condenser section or combustibles as stated in Notes 5a, b, and c, a removable fence or barricade requires no clearance. 7. Units may be installed on combustible floors made from wood or class A, B, or C roof covering material. 8. The vertical center of gravity is [495] for 008 and 009, 2-0 [610] for 012 and 014 up from the bottom of the base rail. Horizontal center of gravity is shown. 8

9 Accessory dimensions ROOF CURB A 1-2 [356] 2-0 [610] ROOF CURB ACCESSORY CRRFCURB003A00 CRRFCURB004A00 B [827] C [583] D ALT DRAIN HOLE [45] CONNECTION SIZES POWER CONNECTION CONTROL CONNECTION 3 4 NPT 1 2 NPT NPT 1 2 NPT CONNECTOR ACY PKG CRBTMPWR001A00 (Thru-the-Bottom) CRBTMPWR002A00 (Thru-the-Bottom) 1. Roof curb accessory is shipped unassembled. 2. Insulated panels. 3. Dimensions in [ ] are in millimeters. 4. Roof curb: galvanized steel. 5. Attach ductwork to curb (flanges of duct rest on curb). 6. Service clearance 4 ft on each side. 7. Direction of airflow. 8. Either accessory connector package can be used with either accessory roof curb. 9

10 Selection procedure (with 50TJ012 example) SI I Determine cooling and heating requirements at design conditions. Given: Required Cooling Capacity (TC)...28kW Sensible Heat Capacity (SHC)...19kW Required Heating Capacity...18kW Condenser Entering-Air Temp...36C Evaporator Entering-Air Temp C edb, 20 C ewb Evaporator Air Quantity L/s External Static Pressure (ESP) Pa Electrical Characteristics (V-Ph-Hz) Edb Entering dry bulb Ewb Entering wet bulb II Select unit based on required cooling capacity. Enter the 50TJ012 Cooling Capacities table on page 14 at condenser entering temperature of 36 C, evaporatorair entering at 1520 L/s, 26.7 C db and 20 C wb. The 50TJ012 unit will provide cooling capacity of 30.1 kw and a sensible heat capacity of 21.2 kw. For evaporator-air temperature other than 26.7 C edb, calculate sensible heat capacity correction, as required, using the formula found in the notes following the Cooling Capacities table on page 15. NOTE: Unit ratings are gross capacities and do not include the effect of evaporator (indoor) fan motor (IFM) heat. To calculate net capacities, see Step V. III Select electric heat: Heating load required is 18 kw. Enter the Electric Heating Capacities table (page 25) for the 50TJ012 at The 19.3 kw heater at 400 v most closely satisfies the heating required. To calculate kw at 380 v, use the Multiplication Factors table on page x.902 = 17.4 kw gross capacity IV Determine fan speed and power requirements at design conditions. Before entering the Fan Performance tables, calculate the total static pressure required based on unit components. From the given and the Pressure Drop tables (page 25), find: External static pressure 300 Pa Economizer 9 Pa Electric Heat 14 Pa Total static pressure 323 Pa Enter the Fan Performance table for the 50TJ012 vertical discharge unit on page 20. Find the fan r/s and kilowatts at 323 Pa and 1520 L/s. Note that the fan speed is 14.5 r/s and power required is 1.56 kw (interpolation required). The standard motor will adequately handle the job requirements. V Determine net capacities. Capacities are gross and do not include the effect of evaporator-fan motor heat. Use IFM kw from Fan Performance table on page 20. Determine net cooling capacity as follows: Net capacity = gross capacity IFM kw = 30.1 kw 1.56 kw = 28.5 kw Net sensible capacity = 21.2 kw 1.56 kw = 19.6 kw Determine net heating capacity as follows: Net capacity = gross capacity IFM heat = 17.4 kw 1.56 kw = 18.9 kw 10

11 Selection procedure (with 50TJ012 example) English I Determine cooling and heating requirements at design conditions. Given: Required Cooling Capacity (TC)... 96,000 Btuh Sensible Heat Capacity (SHC)...70,000 Btuh Required Heating Capacity...62,000 Btuh Condenser Entering-Air Temp...95F Evaporator Entering-Air Temp...80Fedb, 67 F ewb Evaporator Air Quantity cfm External Static Pressure (ESP) in. wg Electrical Characteristics (V-Ph-Hz) Edb Entering dry bulb Ewb Entering wet bulb II Select unit based on required cooling capacity. Enter the 50TJ012 Cooling Capacities table on page 17 condenser entering temperature of 95 F, evaporator-air entering at 3200 cfm, 80 F db and 67 F wb. The 50TJ012 unit will provide cooling capacity of 102,500 Btuh and a sensible heat capacity of 76,000 Btuh. For evaporator-air temperature other than 80 F edb, calculate sensible heat capacity correction, as required, using the formula found in the notes following the Cooling Capacities table on page 17. NOTE: Unit ratings are gross capacities and do not include the effect of evaporator-fan motor (IFM) heat. To calculate net capacities, see Step V. III Select electric heat: Heating load required is 62,000 Btuh. 62,000 Btuh = 18.2 kw of heat required 3413 Btuh/kW Enter the Electric Heating Capacities table (page 25) for the 50TJ012 at The 19.3 kw heater at 400 v most closely satisfies the heating required. To calculate kw at 380 v, use the Multiplication Factors table on page x.902 = 17.4 kw 19.3 x.902 x 3413 = 59,416 Btuh gross capacity IV Determine fan speed and power requirements at design conditions. Before entering the Fan Performance tables, calculate the total static pressure required based on unit components. From the given and the Pressure Drop tables (page 25) find: External static pressure 1.10 in. wg Economizer 0.03 in. wg Electric Heat 0.06 in. wg Total static pressure 1.19 in. wg Enter the Fan Performance table for the 50TJ012 vertical discharge unit on page 23. Find the fan rpm and watts at 1.19 in. wg and 3200 cfm. Note that the fan speed is 842 rpm and power required is 1423 Watts. (Interpolation is required.) The standard motor will adequately handle the job requirements. V Determine net capacities. Capacities are gross and do not include the effect of evaporator-fan motor heat. Use IFM Watts from Fan Performance table on page 23. Determine net cooling capacity as follows: Net capacity = gross capacity IFM Watts = 102,500 Btuh 1423 Watts x Btuh Watts = 102,500 Btuh 4857 Btuh = 97,643 Btuh Net sensible capacity = 76,000 Btuh 4857 Btuh = 71,143 Btuh Determine net heating capacity as follows: Net Capacity = gross capacity IFM heat = 59, = 64,273 Btuh 11

12 Performance data 50TJ008 (21.5 kw) Temp (C) Air Entering Condenser (Edb) COOLING CAPACITIES SI Air Entering Evaporator L/s/BF 850/ /0.075 Air Entering Evaporator Ewb (C) TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw TJ008 (21.5 kw) (cont) Temp (C) Air Entering Condenser (Edb) Air Entering Evaporator L/s/BF 1180/ /0.095 Air Entering Evaporator Ewb (C) TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw

13 50TJ009 (24.3 kw) Temp (C) Air Entering Condenser (Edb) COOLING CAPACITIES SI (cont) Air Entering Evaporator L/s/BF 900/ / /0.10 Air Entering Evaporator Ewb (C) TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw AND NOTES FOR COOLING CAPACITY TABLES SI BF Bypass Factor Edb Entering Dry Bulb Temperature (C) Ewb Entering Wet Bulb Temperature (C) kw Compressor Input (kw) ldb Leaving Dry Bulb lwb Leaving Wet Bulb SHC Sensible Heat Capacity (kw) TC Total Capacity (kw) 1. Ratings are gross, and do not account for the effects of the evaporatorfan motor power and heat. 2. Direct interpolation is permissible. Do not extrapolate. 3. SHC is based on 26.7 C db temperature of air entering the unit. At any other temperature, correct the SHC read from the table of cooling capacities as follows: Corrected SHC kw = SHC [1.23 x 10 3 x(1 BF)x(C db 26.7) x L/s] Observe the rule of sign. Above 26.7 C, SHC correction will be positive; add it to SHC. Below 26.7 C, SHC correction will be negative; subtract it from SHC. 4. Formulas: SHC kw x 1000 C ldb =C edb 1.23 x L/s Leaving wet bulb = wet bulb temperature corresponding to enthalpy of air leaving coil (h lwb ). TC kw x 1000 h lwb =h ewb 1.20 x L/s Where h ewb is enthalpy of air entering evaporator coil (kj/kg). 13

14 Performance data (cont) 50TJ012 (29.2 kw) Temp (C) Air Entering Condenser (Edb) COOLING CAPACITIES SI (cont) Air Entering Evaporator L/s/BF 1140/ /0.105 Air Entering Evaporator Ewb (C) TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw TJ012 (29.2 kw) (cont) Air Entering Evaporator L/s/BF Temp (C) Air Entering 1800/ /0.13 Condenser Air Entering Evaporator Ewb (C) (Edb) TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw

15 50TJ014 (35.9 kw) Temp (C) Air Entering Condenser (Edb) COOLING CAPACITIES SI (cont) Air Entering Evaporator L/s/BF 1500/ / /0.22 Air Entering Evaporator Ewb (C) TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw AND NOTES FOR COOLING CAPACITY TABLES SI BF Bypass Factor Edb Entering Dry Bulb Temperature (C) Ewb Entering Wet Bulb Temperature (C) kw Compressor Input (kw) ldb Leaving Dry Bulb lwb Leaving Wet Bulb SHC Sensible Heat Capacity (kw) TC Total Capacity (kw) 1. Ratings are gross, and do not account for the effects of the evaporatorfan motor power and heat. 2. Direct interpolation is permissible. Do not extrapolate. 3. SHC is based on 26.7 C db temperature of air entering the unit. At any other temperature, correct the SHC read from the table of cooling capacities as follows: Corrected SHC kw = SHC [1.23 x 10 3 x(1 BF)x(C db 26.7) x L/s] Observe the rule of sign. Above 26.7 C, SHC correction will be positive; add it to SHC. Below 26.7 C, SHC correction will be negative; subtract it from SHC. 4. Formulas: SHC kw x 1000 C ldb =C edb 1.23 x L/s Leaving wet bulb = wet bulb temperature corresponding to enthalpy of air leaving coil (h lwb ). TC kw x 1000 h lwb =h ewb 1.20 x L/s Where h ewb is enthalpy of air entering evaporator coil (kj/kg). 15

16 Performance data (cont) 50TJ008 (6.1 TONS) Temp (F) Air Entering Condenser (Edb) COOLING CAPACITIES ENGLISH Air Entering Evaporator Cfm/BF 1950/ / / /0.095 Air Entering Evaporator Ewb (F) TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw TJ009 (6.9 TONS) Temp (F) Air Entering Condenser (Edb) Air Entering Evaporator Cfm/BF 1950/ / /0.10 Air Entering Evaporator Ewb (F) TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw AND NOTES FOR COOLING CAPACITY TABLES ENGLISH BF Bypass Factor Edb Entering Dry Bulb Temperature (F) Ewb Entering Wet Bulb Temperature (F) kw Compressor Motor Power Input ldb Leaving Dry Bulb lwb Leaving Wet Bulb SHC Sensible Heat Capacity (1000 Btuh) TC Total Capacity (1000 Btuh) 1. Ratings are gross, and do not account for the effects of the evaporatorfan motor power and heat. 2. Direct interpolation is permissible. Do not extrapolate. 3. SHC is based on 80 F db temperature of air entering the unit. At any other temperature, correct the SHC read from the table of cooling capacities as follows: Corrected SHC Btuh = SHC [1.10 x (1 BF)x(F db 80) x cfm] Observe the rule of sign. Above 80 F, SHC correction will be positive; add it to SHC. Below 80 F, SHC correction will be negative; subtract it from SHC. 4. Formulas: SHC F Btuh ldb =F edb 1.09 x cfm Leaving wet bulb = wet bulb temperature corresponding to enthalpy of air leaving coil (h lwb ). TC Btuh h lwb =h ewb 4.50 x cfm Where h ewb is enthalpy of air entering evaporator coil (Btu/lb). 16

17 50TJ012 (8.3 TONS) Temp (F) Air Entering Condenser (Edb) COOLING CAPACITIES ENGLISH (cont) Air Entering Evaporator Cfm/BF 2500/ / / /0.13 Air Entering Evaporator Ewb (F) TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw TJ014 (10.2 TONS) Temp (F) Air Entering Condenser (Edb) Air Entering Evaporator Cfm/BF 3150/ / /0.22 Air Entering Evaporator Ewb (F) TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw AND NOTES FOR COOLING CAPACITY TABLES ENGLISH BF Bypass Factor Edb Entering Dry Bulb Temperature (F) Ewb Entering Wet Bulb Temperature (F) kw Compressor Motor Power Input ldb Leaving Dry Bulb lwb Leaving Wet Bulb SHC Sensible Heat Capacity (1000 Btuh) TC Total Capacity (1000 Btuh) 1. Ratings are gross, and do not account for the effects of the evaporatorfan motor power and heat. 2. Direct interpolation is permissible. Do not extrapolate. 3. SHC is based on 80 F db temperature of air entering the unit. At any other temperature, correct the SHC read from the table of cooling capacities as follows: Corrected SHC Btuh = SHC [1.10 x (1 BF)x(F db 80) x cfm] Observe the rule of sign. Above 80 F, SHC correction will be positive; add it to SHC. Below 80 F, SHC correction will be negative; subtract it from SHC. 4. Formulas: SHC F Btuh ldb =F edb 1.09 x cfm Leaving wet bulb = wet bulb temperature corresponding to enthalpy of air leaving coil (h lwb ). TC Btuh h lwb =h ewb 4.50 x cfm Where h ewb is enthalpy of air entering evaporator coil (Btu/lb). 17

18 Performance data (cont) FAN PERFORMANCE (SI) HORIZONTAL DISCHARGE UNITS 50TJ008,009 (21.5 AND 24.3 kw) STANDARD MOTOR (BELT DRIVE) External Static Pressure (Pa) R/s kw R/s kw R/s kw R/s kw R/s kw R/s kw R/s kw R/s kw R/s kw R/s kw Airflow (L/s) BkW Fan Input kw x Motor Efficiency kw Kilowatt Input to Motor 1. Boldface indicates field-supplied drive required (see Note 3). 2. indicates field-supplied motor and drive required. 3. Factory-shipped drive range is to r/s. Other r/s s may require a field-supplied drive. 4. Values include losses for filters, unit casing, and wet coils. 5. Extensive motor and electrical testing on these units ensures that the full range of the motor can be utilized with confidence. Using your fan motors up to the kw ratings shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected. See Evaporator- Fan Motor Performance table on page 24 for additional information. 6. Use of a field-supplied motor may affect wire sizing. Contact your Carrier representative to verify. 7. To convert kw to bkw: BkW = kw x Motor Efficiency Motor Efficiency:.81 Maximum Continuous kw: Interpolation is permissible. Do not extrapolate. 9. Static pressure losses (i.e., economizer, electric heater) must be added to external static pressure before entering Fan Performance table. 50TJ012 (29.2 kw) STANDARD MOTOR (BELT DRIVE) Airflow (L/s) External Static Pressure (Pa) R/s kw R/s kw R/s kw R/s kw R/s kw R/s kw R/s kw R/s kw R/s kw R/s kw BkW Fan Input kw x Motor Efficiency kw Kilowatt Input to Motor 1. Boldface indicates field-supplied drive required (see Note 3). 2. indicates field-supplied motor and drive required. 3. Factory-shipped drive range is to r/s. Other r/s s may require a field-supplied drive. 4. Values include losses for filters, unit casing, and wet coils. 5. Extensive motor and electrical testing on these units ensures that the full range of the motor can be utilized with confidence. Using your fan motors up to the kw ratings shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected. See Evaporator- Fan Motor Performance table on page 24 for additional information. 6. Use of a field-supplied motor may affect wire sizing. Contact your Carrier representative to verify. 7. To convert kw to bkw: BkW = kw x Motor Efficiency Motor Efficiency:.83 Maximum Continuous kw: Interpolation is permissible. Do not extrapolate. 9. Static pressure losses (i.e., economizer, electric heater) must be added to external static pressure before entering Fan Performance table. 18

19 FAN PERFORMANCE (SI) HORIZONTAL DISCHARGE UNITS (cont) 50TJ014 (35.9 kw) STANDARD MOTOR (BELT DRIVE) Airflow (L/s) External Static Pressure (Pa) R/s kw R/s kw R/s kw R/s kw R/s kw R/s kw R/s kw R/s kw R/s kw R/s kw BkW Fan Input kw x Motor Efficiency kw Kilowatt Input to Motor 1. Boldface indicates field-supplied drive required (see Note 3). 2. indicates field-supplied motor and drive required. 3. Factory-shipped drive range is to r/s. Other r/s s may require a field-supplied drive. 4. Values include losses for filters, unit casing, and wet coils. 5. Extensive motor and electrical testing on these units ensures that the full range of the motor can be utilized with confidence. Using your fan motors up to the kw ratings shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected. See Evaporator- Fan Motor Performance table on page 24 for additional information. 6. Use of a field-supplied motor may affect wire sizing. Contact your Carrier representative to verify. 7. To convert kw to bkw: BkW = kw x Motor Efficiency Motor Efficiency:.85 Maximum Continuous kw: Interpolation is permissible. Do not extrapolate. 9. Static pressure losses (i.e., economizer, electric heater) must be added to external static pressure before entering Fan Performance table. FAN PERFORMANCE (SI) VERTICAL DISCHARGE UNITS 50TJ008,009 (21.5 AND 24.3 kw) STANDARD MOTOR (BELT DRIVE) External Static Pressure (Pa) R/s kw R/s kw R/s kw R/s kw R/s kw R/s kw R/s kw R/s kw R/s kw R/s kw Airflow (L/s) BkW Fan Input kw x Motor Efficiency kw Kilowatt Input to Motor 1. Boldface indicates field-supplied drive required (see Note 3). 2. indicates field-supplied motor and drive required. 3. Factory-shipped drive range is to r/s. Other r/s s may require a field-supplied drive. 4. Values include losses for filters, unit casing, and wet coils. 5. Extensive motor and electrical testing on these units ensures that the full range of the motor can be utilized with confidence. Using your fan motors up to the kw ratings shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected. See Evaporator- Fan Motor Performance table on page 24 for additional information. 6. Use of a field-supplied motor may affect wire sizing. Contact your Carrier representative to verify. 7. To convert kw to bkw: BkW = kw x Motor Efficiency Motor Efficiency:.81 Maximum Continuous kw: Interpolation is permissible. Do not extrapolate. 9. Static pressure losses (i.e., economizer, electric heater) must be added to external static pressure before entering Fan Performance table. 19