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NOTES:
1. Weights include economizer (Std)

2.

Center of gravity.

3. Do not locate adjacent units with discharge facing economizer inlet.

Minimum clearances to be:

Adjacent Units: 15

8

-0

9

Top of Units: No overhang
Condenser Coil: 4

8

-0

9

Economizer Side: 6

8

-0

9

Filter Access Side: 10

8

-0

9

(for removal of evaporator coil)

4. For smaller service and operational clearances, contact Carrier

Application Engineering department.

5. Dimensions are in inches. Dimensions in [

] are in millimeters.

6. For units equipped with electric heat, a field-supplied 90° elbow must

be installed in the supply ductwork below the unit discharge.

7. For side-supply/return applications, a single return and supply duct-

work connection is recommended for covering both return and both
supply air openings.

UNIT SIZE

50E

OPERATING

WEIGHT

(lb)

A

B

CORNER WEIGHT

(lb)

ft-in.

ft-in.

1

2

3

4

W038

4282

7-7

5

16

3-10

1

2

961 858 1162 1302

W/Y044

4508

7-3

13

16

3-11

1

2

973 868 1258 1409

W048

4795

7-2

3

16

3-10

3

32

1007 915 1368 1505

Fig. 6 — Base Unit Dimensions, 50EW038-048 and 50EY044

LEGEND

VFD — Variable Frequency Drive

7

Summary of Contents for 50EJ

Page 1: ...cker on the unit control board chip U8 the large chip in the center of the board which states the software Ver sion number Version 1 0 is the original version Ver sion 2 0 is the current version Differences in instal lation configuration and start up procedures in this manual will be identified by Version number INSTALLATION Step 1 Provide Unit Support All panels must be in place when rigging Unit...

Page 2: ...ts are to be 16 ga galvanized steel 4 Dimensions are in inches Fig 1 Roof Curb Sizes 024 034 UNIT LEVELING TOLERANCES DIMENSIONS Degrees and Inches A B Deg in Deg in 1 0 2 9 50 75 From edge of unit to horizontal NOTE To prevent standing water in the drain pan of the indoor section and the heat exchangers UNIT CAN ONLY BE PITCHED AS SHOWN 2 ...

Page 3: ...ts are to be 16 ga galvanized steel 4 Dimensions are in inches Fig 2 Roof Curb Sizes 038 048 NOTE To prevent standing water in the drain pan of the indoor section and the heat exchangers UNIT CAN ONLY BE PITCHED AS SHOWN UNIT LEVELING TOLERANCES DIMENSIONS Degrees and Inches A B Deg in Deg in 1 0 2 9 50 75 From edge of unit to horizontal 3 ...

Page 4: ... accessory roof curb If unit is mounted on dunnage it is recommended the ducts be supported by cross braces as done on accessory roof curb 6 Dimensions are in inches Dimen sions in are in millimeters 7 For units with electric heat a field supplied 90 elbow must be installed in the supply ductwork below the unit discharge LEGEND VFD Variable Frequency Drive UNIT SIZE 50EJ EK OPERATING WEIGHT lb A B...

Page 5: ... attached to accessory roof curb If unit is mounted on dunnage it is recommended the ducts be supported by cross braces as done on accessory roof curb 6 Dimensions are in inches Dimensions in are in millimeters 7 For units with electric heat a field supplied 90 elbow must be installed in the supply ductwork below the unit discharge UNIT SIZE 50E OPERATING WEIGHT lb A B CORNER WEIGHT lb ft in ft in...

Page 6: ...sions in are in millimeters 6 For units equipped with electric heat a field supplied 90 elbow must be installed in the supply ductwork be low the unit discharge 7 For side supply return applications a single return and supply ductwork connection is recommended for cov ering both return and both supply openings UNIT SIZE 50EW EY OPERATING WEIGHT lb A B CORNER WEIGHT lb ft in ft in 1 2 3 4 024 4016 ...

Page 7: ...ches Dimensions in are in millimeters 6 For units equipped with electric heat a field supplied 90 elbow must be installed in the supply ductwork below the unit discharge 7 For side supply return applications a single return and supply duct work connection is recommended for covering both return and both supply air openings UNIT SIZE 50E OPERATING WEIGHT lb A B CORNER WEIGHT lb ft in ft in 1 2 3 4 ...

Page 8: ...not locate air inlets near exhaust vents or other sources of contaminated air Although unit is weatherproof guard against water from higher level runoff and overhangs NOTICE TO RIGGERS ALL PANELS MUST BE IN PLACE WHEN RIGGING NOTE Rig with four cables and spread with two 92 in 2337 mm spreader bars Maintain a dis tance of 74 in 1880 mm from top of unit to eyehook NOTE Add 32 lb 14 5 kg for domesti...

Page 9: ... 11 1 11 1 12 5 11 1 11 1 Nominal Fan Shaft Diameter in 111 16 111 16 111 16 111 16 Belt Quantity Type 1 BX59 1 BX60 1 5VX590 1 BX56 1 BX56 1 5VX590 1 BX62 1 5VX590 1 5VX600 1 BX60 1 5VX590 1 5VX600 Belt Length in 62 63 59 59 59 59 65 59 60 63 59 60 Pulley Center Line Distance in 16 0 18 7 15 6 18 4 15 0 17 9 15 6 18 4 15 6 18 4 15 0 17 9 15 6 18 4 15 0 17 9 15 6 18 4 15 0 17 9 Factory Speed Setti...

Page 10: ...an Shaft Diameter in 111 16 111 16 111 16 Belt Quantity Type 1 BX51 1 5VX630 1 5VX650 1 5VX630 1 5VX670 2 5VX680 1 5VX550 2 5VX560 2 5VX610 Belt Length in 54 63 65 63 67 68 55 56 59 Pulley Center Line Distance in 15 6 18 4 15 0 17 9 15 0 17 9 14 6 17 6 15 0 17 9 14 6 17 6 14 6 17 6 Factory Speed Setting rpm 788 966 1050 1066 1035 1162 1019 1135 1182 HIGH PRESSURE SWITCH psig Cutout 426 426 426 Res...

Page 11: ... tween unit and ducts as required Insulate and weatherproof all external ductwork joints and roof openings with counter flashing and mastic in accordance with applicable codes Ducts passing through an unconditioned space must be insulated and covered with a vapor barrier To attach ductwork to roof curb insert ductwork approxi mately 10 to 11 in up into the curb Connect ductwork to 14 gage roof cur...

Page 12: ...r heating There are 3 sensor options available T 57 sensor will monitor room temperature T 55 sensor will monitor room temperature and provide unoccupied override capability 1 hour T 56 sensor will monitor room temperature provide un occupied override capability 1 hour and provide a tem perature offset of 5 F Standard features are support of remote occupied unoccupied input to start and stop the u...

Page 13: ...o a Carrier Comfort Network When the unit is accessed via a PC equipped with Com fort Works Building Supervisor or Service Tool the fol lowing features can be accessed on board timeclock can be programmed occupancy schedules can be programmed unit set points can be changed alarms can be monitored This access is available on the base control board via a RJ 11 phone jack or a 3 wire connection to th...

Page 14: ...l Board Diagram LEGEND CCN Carrier Comfort Network R Relay COM Common SIO Serial Input Output D Diode SW Switch N C Normally Closed T Terminal N O Normally Open Where X is the unit control software version 1 or 2 14 ...

Page 15: ...t ware to set an occupancy schedule the remote start stop clo sure will allow the unit to operate in the pre configured oc cupied default set points of 55 F supply air temperature cooling and 68 F return air temperature heating Without an occupancy schedule the unit will control to the unoccu pied default set points of 90 F return air cooling and 55 F return air heating if electric heat is install...

Page 16: ...ate On 3 phase units volt ages between phases must be balanced within 2 and the current must be balanced within 10 Use the formula in Table 4 to determine the percentage of voltage imbalance IMPORTANT If the supply voltage phase imbalance is more than 2 contact your local electric utility com pany immediately Unit failure as a result of operation on improper line volt age or excessive phase imbala...

Page 17: ... 36 34 6 72 8 80 72 69 3 83 0 90 12 6 23 6 72 69 3 98 8 100 15 17 51 4 60 12 6 23 6 64 0 80 36 34 6 64 6 70 12 6 23 6 36 34 6 80 3 90 72 69 3 90 5 100 12 6 23 6 72 69 3 106 3 110 LEGEND FLA Full Load Amps HACR Heating Air Conditioning and Refrigeration IFM Indoor Evaporator Fan Motor LRA Locked Rotor Amps MCA Minimum Circuit Amps MOCP Maximum Overcurrent Protection NEC National Electrical Code OFM...

Page 18: ...6 41 6 168 4 164 2 200 200 29 36 75 1 86 6 151 6 160 8 175 175 23 6 41 6 29 36 75 1 86 6 181 1 190 3 200 200 59 72 150 1 173 2 207 9 225 7 250 250 23 6 41 6 59 72 150 1 173 2 237 4 255 2 275 275 460 414 508 19 9 114 19 9 114 2 1 2 7 7 5 11 61 2 80 12 6 23 6 73 8 90 36 43 3 67 9 70 12 6 23 6 36 43 3 83 6 90 72 86 6 100 4 110 12 6 23 6 72 86 6 116 1 125 10 14 64 2 80 12 6 23 6 76 8 90 36 43 3 71 6 8...

Page 19: ... 6 23 6 36 34 6 80 3 90 72 69 3 90 5 100 12 6 23 6 72 69 3 106 3 110 20 22 68 4 80 12 6 23 6 81 0 100 36 34 6 70 8 80 12 6 23 6 36 34 6 86 6 100 72 69 3 96 8 110 12 6 23 6 72 69 3 112 5 125 LEGEND FLA Full Load Amps HACR Heating Air Conditioning and Refrigeration IFM Indoor Evaporator Fan Motor LRA Locked Rotor Amps MCA Minimum Circuit Amps MOCP Maximum Overcurrent Protection NEC National Electric...

Page 20: ...2 1 216 7 275 250 29 36 75 1 86 6 198 5 193 1 250 250 23 6 41 6 29 36 75 1 86 6 222 1 216 7 275 250 59 72 150 1 173 2 224 4 240 7 275 275 23 6 41 6 59 72 150 1 173 2 253 9 270 2 300 300 460 414 508 25 6 120 25 6 120 2 1 2 7 10 14 77 0 100 12 6 23 6 89 6 110 36 43 3 77 0 100 12 6 23 6 36 43 3 89 6 110 72 86 6 104 1 110 12 6 23 6 72 86 6 119 9 125 15 21 84 0 100 12 6 23 6 96 6 110 36 43 3 84 0 100 1...

Page 21: ... 12 6 23 6 36 34 6 85 3 100 72 69 3 90 5 100 12 6 23 6 72 69 3 106 3 110 20 22 77 7 90 12 6 23 6 90 3 110 36 34 6 77 7 90 12 6 23 6 36 34 6 90 3 110 72 69 3 96 8 110 12 6 23 6 72 69 3 112 5 125 LEGEND FLA Full Load Amps HACR Heating Air Conditioning and Refrigeration IFM Indoor Evaporator Fan Motor LRA Locked Rotor Amps MCA Minimum Circuit Amps MOCP Maximum Overcurrent Protection NEC National Elec...

Page 22: ... 300 29 36 75 1 86 6 251 7 244 9 300 300 23 6 41 6 29 36 75 1 86 6 275 3 268 5 300 300 59 72 150 1 173 2 251 7 258 2 300 300 23 6 41 6 59 72 150 2 173 2 275 3 287 7 300 300 460 414 508 28 8 173 28 8 173 4 1 2 7 15 21 96 6 125 12 6 23 6 109 2 125 36 43 3 96 6 125 12 6 23 6 36 43 3 109 2 125 72 86 6 112 9 125 12 6 23 6 72 86 6 128 6 150 20 27 102 6 125 12 6 23 6 115 2 125 36 43 3 102 6 125 12 6 23 6...

Page 23: ...06 6 125 12 6 23 6 36 34 6 119 2 150 72 69 3 106 6 125 12 6 23 6 72 69 3 119 2 150 30 32 111 6 125 12 6 23 6 124 2 150 36 34 6 111 6 125 12 6 23 6 36 34 6 124 2 150 72 69 3 111 6 125 12 6 23 6 72 69 3 124 2 150 LEGEND FLA Full Load Amps HACR Heating Air Conditioning and Refrigeration IFM Indoor Evaporator Fan Motor LRA Locked Rotor Amps MCA Minimum Circuit Amps MOCP Maximum Overcurrent Protection ...

Page 24: ...DIP Dual In Line Package PEC Power Exhaust Controller Fig 14 Control Box Diagram Sizes 024 034 DIP Dual In Line Package PEC Power Exhaust Controller Fig 15 Control Box Diagram Sizes 038 048 24 ...

Page 25: ... Ground WHITE 2 Negative BLACK 3 NOTE If a cable with a different color scheme is selected a similar color code should be adopted for the entire network At each system element the shields of the communica tion bus cables must be tied together If the communication bus is entirely within one building the resulting continuous shield must be connected to a ground at one point only If the communication...

Page 26: ...corner of economizer hood using hood mount ing holes Mount outdoor air thermistor to enthalpy bracket if purchased Attach and wire enthalpy assembly Place quick connects on enthalpy wires 11 Remove screws along bottom of damper assembly Lo cate and mount blockoff baffle using these screws 12 Assemble 2 filter tracks side by side with the as sembled ends together 13 Attach mounting angle without ta...

Page 27: ...SIDE SLOTTED HOOD TOP Fig 23 Adding Foam Strip to Hood Side BLOCKOFF BAFFLE GRAY FOAM STRIP Fig 24 Adding Foam Strip to Blockoff Baffle MOUNTING ANGLE WITHOUT TABS FILTER TRACK ASSEMBLY Fig 25 Mounting Angle Without Tabs Attached to Filter Track Assembly MOUNTING ANGLE WITH TABS Fig 26 Mounting Angle With Tabs Attached to Filter Track Assembly 27 ...

Page 28: ... 6 dur ing the 30 second period following the 30 position The minimum outdoor air damper position is now set ECONOMIZER SETTINGS Accessory Enthalpy Control Fig 28 The control HH57AC077 is mounted in the economizer hood See Fig 19 The enthalpy setting adjustment is on the enthalpy control For maximum benefit of outdoor air set enthalpy control to A See Fig 29 and 30 Accessory Differential Enthalpy ...

Page 29: ...rom damper blades VAV DUCT PRESSURE TRANSDUCER The VAV duct pressure transducer VAV inverter pressure transducer is lo cated behind the filter access door on the lower inner panel See Fig 32 A section of 1 4 in plastic tubing must be run from the high pressure tap on the differential pressure switch and connected to a tap in the supply air duct The tap is usu ally located 2 3 of the way out on the...

Page 30: ...llation in structions included with each accessory MOTORMASTERt III SENSOR LOCATION Motor master III sensor locations are shown in Fig 33A 33C Re fer to the Motormaster III installation instructions for wiring and installation information VAV Variable Air Volume Fig 32 Pressure Transducer Locations Fig 33A Motormaster III Sensor Location Sizes 024 034 30 ...

Page 31: ...Fig 33B MotormasterT III Sensor Location Sizes 038 and 044 Fig 33C Motormaster III Sensor Location Size 048 31 ...

Page 32: ... point value is a percentage of the maximum output frequency Lo cate the duct static pressure closest to that desired and use the corresponding set point value If necessary interpolation between duct static pressures is permissible To set the VFD the VFD must be powered up however since it is located near the indoor air fan operation of the fan is not desirable To disable the fan perform the follo...

Page 33: ...nal Consult the wiring label for wire identification if replacing the module The 3 left hand terminals are not used for this application The S353 module has an LED light emitting diode a set of 4 jumper pins and 2 potentiometers The LED will light whenever the module is activated providing a visual indi cation of the number of exhaust fans running The jumper pins are arranged in a square format Tw...

Page 34: ...sors Used CV Modulated Power Exhaust IN CONJUNCTION WITH FIELD TEST Set Minimum Damper Position CLOSED CV VAV No Space Sensor Base Control Board Only Field Test OFF VAV Occupied Heat Disabled Time Guard Override OFF Electric Heat Air Conditioner Operation CV Thermostat CV Constant Volume Power Exhaust LEGEND CCN Carrier Comfort Network CV Constant Volume VAV Variable Air Volume NOTES 1 The OPEN si...

Page 35: ...y slid ing and pulling outward Remove first filter by sliding it out of the opening in filter track Locate filter removal tool which is shipped next to the return air dampers Use the filter re moval tool to remove the remaining filters Outdoor Air Inlet Screens Outdoor air inlet screens must be in place before operating unit EconomizerAdjustment Remove filter access panel Check that outdoor air da...

Page 36: ...975 6 54 5 000 764 4 21 800 4 62 834 5 04 868 5 46 900 5 89 930 6 33 960 6 77 989 7 22 6 000 785 4 89 820 5 32 854 5 76 886 6 21 918 6 65 948 7 11 977 7 56 1006 8 02 7 000 809 5 70 843 6 16 876 6 61 908 7 08 939 7 54 968 8 01 997 8 49 1025 8 96 8 000 836 6 65 869 7 12 901 7 60 932 8 08 962 8 57 991 9 05 1019 9 55 1046 10 04 8 250 843 6 91 876 7 39 908 7 87 938 8 36 968 8 84 997 9 34 1025 9 83 1052...

Page 37: ...Bhp Rpm Bhp Rpm Bhp Rpm Bhp 8 000 783 5 70 818 6 13 852 6 56 884 7 00 916 7 45 947 7 90 978 8 36 1007 8 82 9 000 803 6 66 836 7 11 869 7 56 900 8 02 930 8 48 960 8 95 989 9 42 1018 9 90 10 000 827 7 77 858 8 23 889 8 70 919 9 18 948 9 66 977 10 15 1005 10 64 1032 11 13 11 000 854 9 03 884 9 51 913 10 00 941 10 50 969 11 00 997 11 50 1024 12 01 1050 12 52 12 000 883 10 45 911 10 96 939 11 47 967 11...

Page 38: ...3 77 1026 14 30 1051 14 84 1076 15 39 1100 15 93 14 000 955 13 98 981 14 53 1006 15 08 1031 15 63 1056 16 18 1080 16 74 1103 17 30 1127 17 86 15 000 991 15 98 1015 16 54 1040 17 11 1063 17 68 1087 18 25 1110 18 83 1133 19 41 1155 19 99 16 000 1028 18 17 1051 18 76 1074 19 34 1097 19 93 1120 20 52 1142 21 12 1164 21 71 1185 22 31 17 000 1066 20 58 1089 21 18 1111 21 78 1133 22 39 1154 23 00 1175 23...

Page 39: ...2 4 34 7 33 89 27 656 93 6 LEGEND BHP Brake Horsepower NOTE Extensive motor and electrical testing on the Carrier units has ensured that the full horsepower range of the motor can be utilized with confidence Using your fan motors up to the horsepower ratings shown on the Motor Limi tations table will not result in nuisance tripping or premature motor failure Unit warranty will not be affected Tabl...

Page 40: ... active and if the unit will operate in a Digital Air Volume DAV mode In a DAV system the room terminals are equipped with microprocessor controls that give commands to the base unit module If a linkage is active the control module will replace local comfort set points space and return air temperatures and occupancy status with the linkage data supplied The control module will determine occupancy ...

Page 41: ...k relay wiring SPACE TEMPERATURE RESET VAV ONLY An ac cessory space temperature sensor is required Space tem perature reset is used to reset the supply air temperature set point of a VAV system higher as the space temperature falls below the Occupied Cool set point As the space tempera ture falls below the cool set point the supply air tempera ture will be reset upward as a function of the reset r...

Page 42: ... and a minimum on time of 10 seconds CRANKCASE HEATER The unit main power supply must remain on to provide crankcase heater operation The crank case heater in each compressor keeps oil free of refrigerant while compressor is off HEAD PRESSURE CONTROL Each unit has a fan cy cling outdoor thermostat to shut off outdoor fan motor s at 55 F one outdoor fan motor on 024 034 units and 2 outdoor fan moto...

Page 43: ...s required use only Carrier approved compressor oil Petroleum Specialties Inc Cryol 150 Texaco Inc Capella WF 32 Witco Chemical Corp Suniso 3GS IMPORTANT Do not use reclaimed oil or oil that has been exposed to the atmosphere Refer to Carrier Stand ard Service Techniques Manual Chapter 1 Refriger ants section for procedures to add or remove oil FAN SHAFT BEARINGS Lubricate the bearings at least tw...

Page 44: ...odule 5 Charging Recovery Recycling and Rec lamation section for charging methods and procedures Unit panels must be in place when unit is operating dur ing charging procedure NO CHARGE Use standard evacuating techniques After evacuating system weigh in the specified amount of refrig erant refer to Table 1 LOW CHARGE COOLING Using appropriate cooling charging chart see Fig 41 and 42 add or remove ...

Page 45: ...N THERMOSTAT FPT An FPT is located on the evaporator coil for each circuit It detects frost build up and turns off the compressor allowing the coil to clear Once the frost has melted the compressor can be reenergized Relief Devices All units have relief devices to pro tect against damage from excessive pressures i e fire These devices are installed on the suction line liquid line and on the compre...

Page 46: ...ING Typical refrigerant circuiting diagrams are shown in Fig 43 45 LEGEND FPS Freeze Protection Switch HPS High Pressure Switch LPS Low Pressure Switch Fig 43 Typical Refrigerant Circuiting 50EJ EK EW EY024 034 46 ...

Page 47: ...LEGEND FPS Freeze Protection Switch HPS High Pressure Switch LPS Low Pressure Switch Fig 44 Typical Refrigerant Circuiting 50EJ EK EW EY038 044 47 ...

Page 48: ...LEGEND FPS Freeze Protection Switch HPS High Pressure Switch LPS Low Pressure Switch Fig 45 Typical Refrigerant Circuiting 50EJ EW048 48 ...

Page 49: ...until the control board has been manually reset 4 HF 15 Thermostat Failure The thermostat is calling for both heating and cooling at the same time The unit will operate on a first call basis and will auto matically reset 5 HF 05 SAT Thermistor Failure The supply air temperature SAT sensor has failed First check for wiring errors then replace sensor 6 HF 06 OAT Thermistor Failure The outside air te...

Page 50: ...AI Analog Input AO Analog Output CCN Carrier Comfort Network CV Constant Volume DI Direct Input DO Direct Output HV High Voltage KV Kilo Ohms OAT Outdoor Air Temperature OFC Outdoor Fan Contactor RAT Return Air Temperature SAT Supply Air Temperature SPT Space Temperature STO Space Temperature Offset T Terminal VAV Variable Air Volume Table 22 I O Channel Designations Base Module VAV TERMINAL NO AS...

Page 51: ...emand Limit DI 24 vac T21 25 Fire Unit Shutdown DI 24 vac T22 25 Fire Pressurization DI 24 vac T23 25 Fire Evacuation DI 24 vac T24 25 Fire Smoke Purge DI 24 vac T26 27 T28 29 T30 29 Alarm Light Indicator DO 24 vac T31 32 Power Exhaust Fire 1 DO 115 vac T33 32 Power Exhaust Fire 2 DO 115 vac T34 35 Power Exhaust Fire 3 DO 115 vac T36 35 Power Exhaust Fire 4 DO 115 vac T37 38 T39 38 K1 K2 K3 LEGEND...

Page 52: ......

Page 53: ......

Page 54: ...le All programs include a video cassette and or slides and a companion booklet Use these for self teaching or to conduct full training sessions For a free Service Training Material Catalog STM call 1 800 962 9212 Ordering instructions are included Copyright 1996 Carrier Corporation Manufacturer reserves the right to discontinue or change at any time specifications or designs without notice and wit...

Page 55: ...N IN HOUSING ORIFICE AND VERIFY SET SCREW IS TIGHT M VERIFY THAT FAN SHEAVES ARE ALIGNED AND BELTS ARE PROPERLY TENSIONED M VERIFY THAT SUCTION DISCHARGE AND LIQUID LINE SERVICE VALVES ON EACH CIRCUIT ARE OPEN START UP ELECTRICAL SUPPLY VOLTAGE L1 L2 L2 L3 L3 L1 COMPRESSOR AMPS COMPRESSOR NO 1 L1 L2 L3 COMPRESSOR NO 2 L1 L2 L3 SUPPLY FAN AMPS CV EXHAUST FAN AMPS VAV VAV fan supply amps reading mus...

Page 56: ...ULLEY PART NUMBER FAN PULLEY PART NUMBER BELT PART NUMBER BELT SIZE in FILTER QUANTITY FILTER SIZES in ADDITIONAL NOTES CUT ALONG DOTTED LINE CUT ALONG DOTTED LINE Copyright 1996 Carrier Corporation Manufacturer reserves the right to discontinue or change at any time specifications or designs without notice and without incurring obligations Book 1 Tab 1b PC 111 Catalog No 535 006 Printed in U S A ...

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