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48EJ,EK,EW,EY024-048
Single Package Rooftop Units
Electric Cooling/Gas Heating
Installation, Start-Up and
Service Instructions
CONTENTS
Page
1. Improper installation, adjustment, alteration, serv-
SAFETY CONSIDERATIONS...................1
ice,ormaintenancecancausepropertydamage,per-
sonal injury, or loss of life. Refer to the User’s
INSTALLATION .............................1-31
InformationManualprovidedwiththisunitformore
Step 1 — Provide Unit Support ...............1
details.
• ROOF CURB
2. Do
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ALTERNATEUNITSUPPORT—Whenthepreferredcurb Step 3 — Field Fabricate Ductwork orslabmountcannotbeused,supportunitwithsleeperson 48EJ,EKUNITS—Field-fabricatedductworkshouldbeat- perimeter,usingunitcurbsupportarea.Ifsleeperscannotbe tachedtotheroofcurb.Supplyandreturnductdimensions used, support long sides of unit (refer to Fig. 3-6) with a are shown in Fig. 3 and 4. Air distribution is shown in minimum number of 4-in. x 4-in. pads spaced as follows: Fig. 8. 48EJ,EK,EW,EY024-034unitsrequire3padsonea
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NOTES: UNIT LEVELING TOLERANCES DIMENSIONS* 1. All roof curb parts are to be 16 ga galvanized steel. (Degrees and Inches) 2. Dimensions are in inches. 3. Topreventstandingwaterinthedrainpanoftheindoor AB sectionandtheheatexchangers,unitcanonlybepitched Deg. in. Deg. in. as shown. 1.0 2.9 .50 .75 *From edge of unit to horizontal. Fig. 1 — Roof Curb (Sizes 024-034) 3
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NOTES: UNIT LEVELING TOLERANCES DIMENSIONS* 1. All roof curb parts are to be 16 ga galvanized steel. (Degrees and Inches) 2. Dimensions are in inches. 3. Topreventstandingwaterinthedrainpanoftheindoor AB sectionandtheheatexchangers,unitcanonlybepitched Deg. in. Deg. in. as shown. 1.0 2.9 .50 .75 *From edge of unit to horizontal. Fig. 2 — Roof Curb (Sizes 038-048) 4
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VFD — Variable Frequency Drive NOTES: 1. Weights include economizer (STD). 2. Center of gravity. 3. Do not locate adjacent units with flue dis- chargefacingeconomizerinlet.Minimumclear- ances to be: Adjacent Units: 158-09 Top of Units: No overhang Condenser Coil: 48-09 Economizer Side: 68-09 Gas Heat Side: 48-09 FilterAccess Side: 108-09 (For Removal of Evaporator Coil) 4. For smaller service and operational clear- ances, contact CarrierApplication Engineer- ing department. 5. Bottomductsdesigned
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VFD — Variable Frequency Drive OPERATING A B CORNER WEIGHT (lb) UNIT WEIGHT NOTES: SIZE 1. Weights include economizer (STD). lb ft-in. ft-in. 1 2 3 4 11 7 2. Center of gravity. 48EJ,EKD038 4442 7- 8 ⁄16 3-10 ⁄8 1021 894 1180 1347 1 3 48EJE038 4602 7-10 ⁄8 3-11 ⁄16 1080 934 1200 1388 3. Donotlocateadjacentunitswithfluedischargefacingecono- mizer inlet. Minimum clearances to be: 5 7 48EJ,EKD044 4668 7- 5 ⁄16 3-10 ⁄8 1033 906 1275 1455 Adjacent Units: 158-09 13 3 48EJE044 4828 7- 6 ⁄16 3-11 ⁄16 1094
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VFD — Variable Frequency Drive OPERATING A B CORNER WEIGHT (lb) UNIT WEIGHT NOTES: SIZE 1. Weights include economizer (STD). lb ft-in. ft-in. 1 2 3 4 3 3 2. Center of gravity. 48EW,EYD024 4176 6- 0 ⁄8 3-6 ⁄8 879 954 1220 1124 5 11 48EWE024 4256 6- 1 ⁄16 3-6 ⁄16 917 973 1218 1148 3. Donotlocateadjacentunitswithfluedischargefacingeconomizerinlet. Minimum clearances to be: 5 48EW,EYD028 4262 5- 9 ⁄8 3-8 899 899 1232 1232 Adjacent Units: 158-09 1 5 48EWE028 4342 5-10 ⁄8 3-8 ⁄16 929 916 1240 1257 Top
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VFD — Variable Frequency Drive OPERATING A B CORNER WEIGHT (lb) UNIT WEIGHT NOTES: SIZE 1. Weights include economizer (STD). lb ft-in. ft-in. 1 2 3 4 11 7 2. Center of gravity. 48EW,EYD038 4442 7- 8 ⁄16 3-10 ⁄8 1021 894 1180 1347 1 3 48EWE038 4602 7-10 ⁄8 3-11 ⁄16 1080 934 1200 1388 3. Do not locate adjacent units with flue discharge facing economizer inlet. Minimum clearances to be: 5 7 48EW,EYD044 4668 7- 5 ⁄16 3-10 ⁄8 1033 906 1275 1455 Adjacent Units: 158-09 13 3 48EWE044 4828 7- 6 ⁄16 3-11 ⁄
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WEIGHT A B C UNIT lb kg in. mm in. mm in. mm 48EJ,EK,EW,EYD024 4176 1894 72.4 1839 42.4 1072 48EJ,EWE024 4256 1930 73.3 1862 42.7 1085 48EJ,EK,EW,EYD028 48EJ,EK,EW,EYD030 4262 1933 69.6 1768 44.0 1118 87.68 2227 48EJ,EK,EW,EYD034 48EJ,EWE028 48EJ,EWE030 4342 1969 70.1 1781 44.3 1125 48EJ,EWE034 48EJ,EK,EW,EYD038 4442 2015 92.7 2355 46.9 1191 48EJ,EWE038 4602 2087 94.1 2390 47.2 1199 48EJ,EK,EW,EYD044 4668 2117 89.3 2268 46.9 1191 150 3810 48EJ,EWE044 4828 2190 90.8 2306 47.2 1199 48EJ,EK,EW,EYD0
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Table 1 — Physical Data UNIT 48EJ,EK,EW,EY 024D/E 028D/E 030D/E 034D/E NOMINAL CAPACITY (tons) 20 25 27 30 OPERATING WEIGHT (lb)* Unit Al/Al† (Lo Heat/Hi Heat) 4176/4256 4262/4342 4262/4342 4262/4342 Al/Cu† (Lo Heat/Hi Heat) 4396/4476 4482/4562 4482/4562 4482/4562 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) (Ckt 1, Ckt 2) 115, 88 115 ea. 115 ea. 115 ea. REFRIGERANT TYPE
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Table 1 — Physical Data (cont) UNIT 48EJ,EK,EW,EY 038D/E 044D/E 048D/E NOMINAL CAPACITY (tons) 35 40 45 OPERATING WEIGHT (lb)* Unit Al/Al† (Lo Heat/Hi Heat) 4442/4602 4668/4828 4955/5115 Al/Cu† (Lo Heat/Hi Heat) 4727/4887 4953/5113 5335/5495 Roof Curb (14-in. curb) 410 410 410 COMPRESSOR Type Ckt 1 06D537 06EA250 06EA265 Ckt 2 06D537 06EA250 06EA250 Number of Refrigerant Circuits 222 Oil (oz) (Ckt 1, Ckt 2) 115 ea. 224 ea. 304, 224 REFRIGERANT TYPE R-22 Operating Charge (lb-oz) Circuit 1** 34-0
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Table 2 — Evaporator Fan Motor Data (Units with Starting Serial Numbers 4197 and Later) MOTOR FAN MOTOR FAN BELT UNIT SHEAVE BUSHING SHEAVE BUSHING OUTSIDE MOTOR SHAFT SHAFT MOTOR FAN BELT TENSION SIZE PITCH DIAMETER PITCH DIAMETER BELT HP DIA. SPEED SHEAVE SHEAVE (QUANTITY) (Lb at 48E DIAMETER (in.) DIAMETER (in.) LENGTH (in.) (rpm) .24 in.) (in.) (in.) 5 1.12 717 BK55 4.8 None-1.125 1B5V124 12.4 B-1.9375 BX59 62 5.10 024 10 1.38 924 2BK50 4.4 None-1.375 2B5V86 8.6 B-1.9375 (2) BX51 54 5.21 15
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Step5—TrapCondensateDrain— See Fig. 3-6 for drain location. Condensate drain is open to atmosphere and must be trapped. Install a trapped drain at the drain lo- cation.Atrap at least 4-in. deep must be used. See Fig. 12. Trap must be installed to prevent freeze-up. Condensatepansareslopedsothatwaterwillcompletely drainfromthecondensatepantocomplywithindoorairqual- ityguidelines.Thecondensatedrainpanisfittedwitha1-in. FPT coupling. Step6—InstallGasPiping— Unitisequippedfor use with natural gas. In
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Table 3 — Controls Options and Configurations (Non-Thermostat Applications) UNIT CONFIGURATION DEFAULT COOLING DEFAULT HEATING Unoccupied Cooling — 90 F (SPT) Unoccupied Heating — 55 F (SPT) CV or VAV Unit with SPT Sensor Occupied Cooling — NA Occupied Heating — NA CV Unit with SPT Sensor and Remote Unoccupied Cooling — 90 F (SPT) Unoccupied Heating — 55 F (SPT) Start/Stop Switch Occupied Cooling — 78 F (SPT) Occupied Heating — 68 F (SPT) Unoccupied Cooling — 90 F (RAT) Unoccupied Heating — 55 F
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VARIABLEAIR VOLUME (VAV)APPLICATIONS Features with Stand-Alone Applications— The units, as REMOTE shipped, are operable as stand-alone units with the addition START/STOP of a timeclock to establish unit start and stop times. SWITCH (FIELD-SUPPLIED) Heating and cooling in both on and off modes is con- R trolled to default values by the base unit control. Set points may be changed with appropriate input devices. Y1 The control has an on-board occupancy schedule which Y2 canbeset
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When a VAV unit with a space temperature sensor is ac- Step 8 — Make Electrical Connections cessedviaacomputer,thefollowingadditionalfeaturesare available: POWERWIRING—Unitsarefactorywiredforthevoltage shown on the unit nameplate. • ability to initiate timed override from T-55 sensors • temperaturecompensatedstarttocalculateearlystarttime When installing units, provide a disconnect per NEC before occupancy (National Electrical Code) of adequate size (MOCP[maxi- • providespacetemperatureresettore
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17 LEGEND *Where X is the unit control software version number. CCN — Carrier Comfort Network N.O. — Normally Open COM — Common R— Relay D— Diode SIO — Serial Input/Output LED — Light-Emitting Diode SW — Switch N.C. — Normally Closed T— Terminal Fig. 16 — Control Board Diagram
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Table 4 — Electrical Data COMPRESSOR VOLTAGE POWER COMBUSTION OFM IFM POWER SUPPLY UNIT NOMNAL RANGE EXHAUST FAN MOTOR No. 1 No. 2 SIZE VOLTAGE FLA 48E (3 Ph 60 Hz) Min Max RLA LRA RLA LRA Qty Hp Hp FLA FLA LRA FLA MCA MOCP* (ea) — — 0.96 101.8/100.3 125/125 16.7/ 5 15.2 23.6 41.6 0.96 125.4/123.9 150/150 — — 0.96 115.9/113.1 150/150 30.8/ 208/230 187 254 39.1 228 25.6 160 2 1 5.3 10 28.0 23.6 41.6 0.96 139.5/136.7 175/175 — — 0.96 131.3/127.1 150/150 46.2/ 15 42.0 23.6 41.6 0.96 154.9/150.7 175
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Table 4 — Electrical Data (cont) COMPRESSOR VOLTAGE POWER COMBUSTION OFM IFM POWER SUPPLY UNIT NOMINAL RANGE EXHAUST FAN MOTOR No. 1 No. 2 SIZE VOLTAGE FLA 48E (3 Ph 60 Hz) Min Max RLA LRA RLA LRA Qty Hp Hp FLA FLA LRA FLA MCA MOCP* (ea) — — 0.96 169.9/167.1 225/200 30.8/ 10 28.0 23.6 41.6 0.96 193.5/190.7 250/225 — — 0.96 185.3/181.1 225/225 46.2/ 208/230 187 254 57.1 266 57.1 266 2 1 5.3 15 42.0 23.6 41.6 0.96 208.9/204.7 250/250 — — 0.96 198.5/193.1 250/250 59.4/ 20 54.0 23.6 41.6 0.96 222.1/
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Table 4 — Electrical Data (cont) COMPRESSOR VOLTAGE POWER COMBUSTION OFM IFM POWER SUPPLY UNIT NOMINAL RANGE EXHAUST FAN MOTOR No. 1 No. 2 SIZE VOLTAGE FLA 48E (3 Ph 60 Hz) Min Max RLA LRA RLA LRA Qty Hp Hp FLA FLA LRA FLA MCA MOCP* (ea) — — 0.96 223.1/218.9 275/275 46.2/ 15 42.0 23.6 41.6 0.96 246.7/242.5 300/300 — — 0.96 236.3/230.9 300/300 59.4/ 208/230 187 254 69.2 345 69.2 345 4 1 5.3 20 54.0 23.6 41.6 0.96 259.9/254.5 300/300 — — 0.96 251.7/244.9 300/300 74.8/ 25 68.0 23.6 41.6 0.96 275.3/
