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50EJ,EK,EW,EY024-048
Single-Package Rooftop Units
Electric Cooling with Electric Heat Option
Installation, Start-Up and
Service Instructions
CONTENTS IMPORTANT — READ BEFORE INSTALLING
Page
IMPORTANT: Due to upgrades in unit control soft-
SAFETY CONSIDERATIONS.................. 1
wareandhardware,unitsproducedcurrentlyareslightly
different than original design units. The unit control
INSTALLATION ............................ 1-31
software(whichhaschanged)isdesignatedwithasticker
Step 1 — Provide
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NOTE:To prevent standing water in the drain pan of the indoor section andtheheatexchangers,UNITCANONLYBEPITCHEDASSHOWN. UNIT LEVELING TOLERANCES DIMENSIONS* (Degrees and Inches) NOTES: 1. Unlessotherwisespecified,alldimensionsaretoout- AB side of part. 2. Roof curb accessory is shipped disassembled. Deg. in. Deg. in. 3. Allroofcurbpartsaretobe16gagalvanizedsteel. 1.0 2.9 .50 .75 4. Dimensions are in inches. *From edge of unit to horizontal. Fig. 1 — Roof Curb (Sizes 024-034) 2
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NOTE: To prevent standing water in the drain pan of the indoor section and the heat exchangers, UNIT CAN ONLY BE PITCHEDAS SHOWN. NOTES: 1. Unlessotherwisespecified,alldimensionsaretoout- UNIT LEVELING TOLERANCES DIMENSIONS* side of part. (Degrees and Inches) 2. Roof curb accessory is shipped disassembled. 3. Allroofcurbpartsaretobe16gagalvanizedsteel. AB 4. Dimensions are in inches. Deg. in. Deg. in. 1.0 2.9 .50 .75 *From edge of unit to horizontal. Fig. 2 — Roof Curb (Sizes 038-048) 3
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NOTES: 1. Weights include economizer (Std) 2. Center of gravity. 3. Do not locate adjacent units with dis- charge facing economizer inlet. Mini- mum clearances to be: Adjacent Units: 158-09 Top of Units: No overhang Condenser Coil: 48-09 Economizer Side: 68-09 Filter Access Side: 108-09 (for re- moval of evaporator coil) 4. For smaller service and operational clearances, contact Carrier Applica- tion Engineering department. 5. Bottomductsdesignedtobeattached toaccessoryroofcurb.Ifunitismounted o
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NOTES: LEGEND 1. Weights include economizer (Std) VFD — Variable Frequency Drive 2. Center of gravity. 3. Donotlocateadjacentunitswithdischargefacingeconomizerinlet.Mini- mum clearances to be: Adjacent Units: 158-09 Top of Units: No overhang Condenser Coil: 48-09 Economizer Side: 68-09 FilterAccess Side: 108-09 (for removal of evaporator coil) 4. Forsmallerserviceandoperationalclearances,contactCarrierApplica- tion Engineering department. 5. Bottom ducts designed to be attached to accessory roof
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NOTES: LEGEND 1. Weights include economizer (Std) VFD — Variable Frequency Drive 2. Center of gravity. 3. Donotlocateadjacentunitswithdischargefacingecono- mizer inlet. Minimum clearances to be: Adjacent Units: 158-09 Top of Units: No overhang Condenser Coil: 48-09 CORNER WEIGHT OPERATING AB UNIT SIZE Economizer Side: 68-09 (lb) WEIGHT 50EW/EY FilterAccess Side: 108-09 (for removal of evaporator (lb) ft-in. ft-in. 1 2 3 4 coil) 3 11 024 4016 5-11 ⁄8 3-5 ⁄16 823 914 1199 1080 4. For smaller servi
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NOTES: LEGEND 1. Weights include economizer (Std) VFD — Variable Frequency Drive 2. Center of gravity. 3. Do not locate adjacent units with discharge facing economizer inlet. Minimum clearances to be: Adjacent Units: 158-09 Top of Units: No overhang Condenser Coil: 48-09 Economizer Side: 68-09 CORNER WEIGHT OPERATING AB FilterAccess Side: 108-09 (for removal of evaporator coil) UNIT SIZE (lb) WEIGHT 4. For smaller service and operational clearances, contact Carrier 50E (lb) ft-in. ft-in. 1 2 3 4
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Fourliftinglugsareprovidedontheunitbaserailsasshown Step2—RigandPlaceUnit— Inspectunitfortrans- in Fig. 7. Refer to rigging instructions on unit. portationdamage.Fileanyclaimwithtransportationagency. Keep unit upright, and do not drop. Use spreader bars over POSITIONING—Provideclearancearoundandaboveunit unit to prevent sling or cable damage. Rollers may be used for airflow, safety, and service access (Fig. 3-6). to move unit across a roof. Level by using unit frame as a Donotinstallunitinanindoo
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Table 1 — Physical Data UNIT 50EJ,EK,EW,EY 024 028 030 034 NOMINAL CAPACITY (tons) 20 25 27 30 OPERATING WEIGHT (lb)* Unit Al/Al† 4016 4102 4102 4102 Al/Cu† 4236 4322 4322 4322 Roof Curb (14-in. curb) 365 365 365 365 COMPRESSOR Type Ckt 1 06D328 06D328 06D537 06D537 Ckt 2 06D818 06D328 06D328 06D537 Number of Refrigerant Circuits 22 2 2 Oil (oz) (Ckt1, Ckt 2) 115, 88 115 ea. 115 ea. 115 ea. REFRIGERANT TYPE R-22 Operating Charge (lb-oz) Circuit 1** 25-0 25-0 25-0 25-0 Circuit 2 31-0 25-0 25-0 25
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Table 1 — Physical Data (cont) UNIT 50EJ,EK,EW,EY 038 044 048 NOMINAL CAPACITY (tons) 35 40 45 OPERATING WEIGHT (lb)* Unit Al/Al† 4282 4508 4795 Al/Cu† 4567 4793 5175 Roof Curb (14-in. curb) 410 410 410 COMPRESSOR Type Ckt 1 06D537 06EA250 06EA265 Ckt 2 06D537 06EA250 06EA250 Number of Refrigerant Circuits 22 2 Oil (oz) (Ckt1, Ckt 2) 115 ea. 224 ea. 304, 224 REFRIGERANT TYPE R-22 Operating Charge (lb-oz) Circuit 1** 34-0 35-0 41-0 Circuit 2 34-0 35-0 41-0 3 CONDENSER COIL Cross-Hatched ⁄89 Coppe
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Table 2 — Evaporator Fan Motor Data MOTOR FAN MOTOR FAN BELT SHEAVE BUSHING SHEAVE BUSHING OUTSIDE UNIT MOTOR SHAFT SHAFT MOTOR FAN TENSION PITCH DIAMETER PITCH DIAMETER BELT BELT SIZE HP DIAMETER SPEED SHEAVE SHEAVE (Lb @ DIAMETER (in.) DIAMETER (in.) LENGTH (in.) (rpm) .24 in.) (in.) (in.) 5 1.12 725 BK52 4.6 None-1.125 1B5V110 11.1 B-1.6875 BX59 62 5.02 024 10 1.38 924 BK72 6.6 None-1.375 1B5V124 12.5 B-1.6875 BX60 63 7.05 15 1.62 1088 1B5V68 6.9 B-1.625 1B5V110 11.1 B-1.6875 5VX590 59 9.38 7
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• controlofmodulatingeconomizerdampertoprovidefree cooling when outdoor conditions are suitable, using sup- ply air temperature as a control point • controloftheeconomizerdamperandindoorfantoobtain unoccupied free cooling • provide power exhaust output to an external power ex- haust controller • support a field test for field checkout • control of 2 stages of CV power exhaust • compressorTimeGuardt(powerupandminimumoffand on times) Additional features are provided by accessing the stand- ard unit
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Featureswithsensorcontrolofunitwithcomputeraccess or during unexpected power outages. For complete Carrier are: ComfortSystem(CCS)orCarrierComfortNetwork(CCN) features and benefits, refer to the product literature. • 365daytimeclockwithbackup(supportsminute,hour, day of week, date, month, and year) VARIABLEAIR VOLUME (VAV)APPLICATIONS • daylight savings time function Features with Stand-Alone Applications— A VAV unit is • occupancy control with 8 periods for unit operation capable of providing un
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14 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). Fig. 12 — Control Board Diagram
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ForunitsrunningVersion1.0oftheunitcontrolsoftware, an occupancy schedule, the unit will control to the unoccu- networkaccesssoftwareisrequiredtoenableoccupiedheat- pied default set points of 90 F (return air) cooling and 55 F ing. For units running Version 2.0 of the unit control soft- (return air) heating (if electric heat is installed). ware, occupied heating is enabled or disabled by the posi- FeatureswithNetworkApplications—Thebasecontrolboard tion of DIP switch no. 5. provides, as standard,
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1 A3⁄2-in. NPT coupling for field power wiring and a IMPORTANT: Ifthesupplyvoltagephaseimbalance 3 ⁄4-in.NPTcouplingfor24-vcontrolwiringareprovidedin ismorethan2%,contactyourlocalelectricutilitycom- 1 basepan.Inthesidepost,therearetwo2 ⁄2-in.(024-034)or pany immediately. 3-in. (038-048) knockouts for the field power wiring. See Fig. 3-6. If control wiring is to be brought in through the 7 Unitfailureasaresultofoperationonimproperlinevolt- side of unit, a ⁄8-in. diameter hole is provided in the con
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Table 4 — Electrical Data — 50EJ,EK,EW,EY024-048 COMPRESSOR VOLTAGE POWER ELECTRIC NOMINAL OFM IFM POWER SUPPLY UNIT RANGE EXHAUST HEAT* VOLTAGE No. 1 No. 2 SIZE (3 Ph 60 Hz) Min Max RLA LRA RLA LRA Qty Hp FLA (ea) Hp FLA FLA LRA kW FLA MCA MOCP† — — — — 101.8/100.3 125/125 23.6 41.6 — — 125.4/123.9 150/150 16.7/ — — 29/36 75.1/ 86.6 114.7/127.3 125/150 5 15.2 23.6 41.6 29/36 75.1/ 86.6 144.2/156.8 150/175 — — 59/72 150.1/173.2 171.0/192.2 200/225 23.6 41.6 59/72 150.1/173.2 200.5/221.7 225/225
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Table 4 — Electrical Data — 50EJ,EK,EW,EY024-048 (cont) COMPRESSOR VOLTAGE POWER ELECTRIC NOMINAL OFM IFM POWER SUPPLY UNIT RANGE EXHAUST HEAT* VOLTAGE No. 1 No. 2 SIZE (3 Ph 60 Hz) Min Max RLA LRA RLA LRA Qty Hp FLA (ea) Hp FLA FLA LRA kW FLA MCA MOCP† — — — — 122.8/120.6 150/150 23.6 41.6 — — 146.4/144.2 175/175 24.2/ — — 29/36 75.1/ 86.6 124.1/135.8 150/150 7.5 22.0 23.6 41.6 29/36 75.1/ 86.6 153.6/165.3 175/175 — — 59/72 150.1/173.2 180.4/200.7 200/225 23.6 41.6 59/72 150.1/173.2 209.9/230.2
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Table 4 — Electrical Data — 50EJ,EK,EW,EY024-048 (cont) COMPRESSOR VOLTAGE POWER ELECTRIC NOMINAL OFM IFM POWER SUPPLY UNIT RANGE EXHAUST HEAT* VOLTAGE No. 1 No. 2 SIZE (3 Ph 60 Hz) Min Max RLA LRA RLA LRA Qty Hp FLA (ea) Hp FLA FLA LRA kW FLA MCA MOCP† — — — — 151.9/149.1 200/200 23.6 41.6 — — 175.5/172.7 225/225 30.8/ — — 29/36 75.1/ 86.6 151.9/149.1 200/200 10 28.0 23.6 41.6 29/36 75.1/ 86.6 175.5/172.8 225/225 — — 59/72 150.1/173.2 188.6/208.2 200/225 23.6 41.6 59/72 150.1/173.2 218.1/237.7
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Table 4 — Electrical Data — 50EJ,EK,EW,EY024-048 (cont) COMPRESSOR VOLTAGE POWER ELECTRIC NOMINAL OFM IFM POWER SUPPLY UNIT RANGE EXHAUST HEAT* VOLTAGE No. 1 No. 2 SIZE (3 Ph 60 Hz) Min Max RLA LRA RLA LRA Qty Hp FLA (ea) Hp FLA FLA LRA kW FLA MCA MOCP† — — — — 169.9/167.1 225/200 23.6 41.6 — — 193.5/190.7 250/225 30.8/ — — 29/36 75.1/ 86.6 169.9/167.1 225/200 10 28.0 23.6 41.6 29/36 75.1/ 86.6 193.5/190.7 250/225 — — 59/72 150.1/173.2 188.6/208.2 225/225 23.6 41.6 59/72 150.1/173.2 218.1/237.7
