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Carrier 48AJ manual

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  • Page 1

    Manufacturer reserves the right to disco ntinue, or change at any time, specifications or de signs without notice and without inc urring obligations. Catalog No . 04-53480067-0 1 Printed in U. S.A. F orm 48A-7SI Pg 1 8-09 Replaces: 48A-5SI Installation Instr uctions CONTENTS Page SAFETY CONSIDERA TIONS . . . . . . . . . . . . . . . . . . . . . . 1 [...]

  • Page 2

    2 RO OF CUR B — For vertical dischar ge units, assemble or in- stall accessory roof curb in accordance with instructions shipped with this accessory . See Fig. 1-3. Install insulation, cant strips, roofing, and counter flashing as shown. Ductwork can be installed to roof curb before unit is set in place. Curb should be level. This is necess ary t[...]

  • Page 3

    3 Fig. 1 — Roof Curb — 48AJ,AK020-035 Units a48-6715 NOTES: 1. UNLESS O THER WISE SPECIFIE D , ALL DI MENSIONS ARE T O OUTSIDE OF P ART . 2. ROOF CURB ACCESSOR Y CRRFCURB0 05A00 IS SHIPPED DISASSEMBLED . 3. ALL RO OF CURB P ARTS ARE T O BE 14 GA. GA L V ANIZED STE EL. 4. UNITS WITH ELECTRIC HEA T MUST BE IN ST ALLED WITH A 90° ELBO W ON THE SU[...]

  • Page 4

    4 Fig. 2 — Roof Curb — 48AJ,AK036 -050 Units a48-6716 NOTES: 1. UNLESS O THER WISE SPECIFIE D , ALL DI MENSIONS ARE T O OUTSIDE OF P ART . 2. ROOF CURB ACCESSOR Y CRRFCURB0 05A00 IS SHIPPE D DISASSEMBLED . 3. ALL RO OF CURB P ARTS ARE T O BE 14 GA. GA L V ANIZED STE EL. 4. UNITS WITH ELECTRIC HEA T MUST BE IN ST ALLED WITH A 90° ELBO W ON THE [...]

  • Page 5

    5 Fig. 3 — R oof Curb — 48AJ,A K051 and 060 Unit s a48-6717 NOTES: 1. UNLESS O THERW ISE SPECIFIED , ALL DIMENSIONS ARE TO OUTSIDE OF P AR T . 2. ROOF CURB ACCESSOR Y CRRFCURB005A00 IS SHIPPED DIS- ASSEMBLED . 3. ALL RO OFCURB P ART S ARE T O BE 14 GA. GAL V ANIZE D STEEL. 4. DIME NSIONS IN [ ] ARE IN MILLIMETERS. ALL OTHER DIMEN- SIONS ARE IN [...]

  • Page 6

    6 * OPERA TING WEIGHT INCL UDES LARGEST INDOOR F AN MOTOR, CU/AL COILS, MODULA TING POWER EXHA UST (VARIABLE AIR VOL UME), AND V ARIABLE FREQUENCY DRIVE ( V ARIABLE AIR VOLUME). Fig. 4 — Base Unit Dime nsions — 48AJ,AK020-035 a48-8235 NOTES: 1. WEIGHT S INCLUDE ECON OMIZER (STD) . 2. CENTER OF GRA VITY . 3. UNIT CLEARANCES: TOP OF UNITS: NO O V[...]

  • Page 7

    7 * OPERA TING WEIGHT INCL UDES LARGEST INDOOR F AN MOTOR, CU/AL COILS, MODULA TING POWER EXHA UST (VARIABLE AIR VOL UME), AND V ARIABLE FREQUENCY DRIVE ( V ARIABLE AIR VOLUME). Fig. 5 — Base Unit Dimensions — 48AJ, AK036-050 a48-8236 N OTE S: 1. WEIGHTS INCLUDE ECONOMIZER (STD). 2. CENTER OF GRA VITY . 3. UNIT CLEARANCES: T OP OF UN ITS: NO OV[...]

  • Page 8

    8 Fig. 6 — Base Unit Di mensions — 48AJ,AK05 1 and 060[...]

  • Page 9

    9 Fig. 7 — Base Unit Dime nsions — 48AW,AY020 -035 A48-8380 NO TES: 1. WEIGHTS INCLUDE ECONOMIZER (S TD). 2. CENTER OF GRA VITY . 3. UNIT CLEARANCES: TOP OF UNITS: NO O VERHANG CONDENSER COIL: 4’ - 0“ [1219] ECONOMIZER SIDE: 6’ - 0” [1829] HEA T SIDE: 4’ ’ - 0” [1219] FIL TER ACCESS SIDE: 1 0’ - 0” [3048] (FOR REMO V AL OF EV [...]

  • Page 10

    10 * OPERA TING WEIGHT INCLUDES LARGEST INDOOR F AN MOTOR, CU/AL C OILS, MODULA TING POWER EXHA UST ( V ARIABLE AIR VOL UME), AND V ARIABLE FREQUENCY DRIVE ( V ARIABLE AIR VOL UME). Fig. 8 — Base Unit Dimensi ons — 48AW,AY036- 050 a48-8239 NOTES: 1. WEIGHTS INCLUDE ECONOMIZER (STD). 2. CENTER OF GRA VITY . 3. UNIT CLEARANCES: T OP OF UN ITS: NO[...]

  • Page 11

    11 Fig. 9 — Base Unit Dimensions — 48AW,AY051 and 060 a48-8240 FOR CENTERS OF GRA VITY , OPERA TING AND CORNER WE IGHTS , SEE FIGURE 10[...]

  • Page 12

    12 48AJ/AK L OW HEA T 48AJ/AK HIGH HEA T 48AJ/AK L OW HEA T 48AJ/AK HIGH HEA T 48A W/A Y HIGH HEA T 48A W/A Y LOW HEA T 48A W/A Y LOW HEA T 48A W/A Y HIGH HEA T 48AJ/AK051 LOW HEA T 48AJ/AK051 HIGH HEA T 48A W/A Y051 LOW HEA T 48A W/A Y051 HIGH HEAT 48AJ/AK060 LOW HEA T 48A W/A Y060 LOW HEA T 48AJ/AK060 HIGH HEA T 48A W/A Y060 HIGH HEAT Fig. 10 —[...]

  • Page 13

    13 Table 1 — Physic al Data — 48AJ,AK,AW,A Y Units LEGEND *Sizes 020-040 : Circuit 1 uses the lower por tion of con denser coil, Circuit 2 us es the upper portion. Sizes 041- 060: Circuit 1 uses the left co ndenser coil, Cir cuit 2 the right. All u nits hav e intertwined ev apor ator coils . †Rollout swit ch is manua l reset. UNIT 48AJ, AK,A [...]

  • Page 14

    14 Table 1 — Physical Data — 48AJ,AK,AW,AY Units (c ont) LEGEND *Sizes 020-040 : Circuit 1 uses the lower por tion of con denser coil, Circuit 2 use s the upper portion. Sizes 041- 060: Circuit 1 uses the left co ndenser coil, Cir cuit 2 the right. All u nits hav e intertwined ev apor ator coils . †Rollout s wit ch is manua l reset. UNIT 48AJ[...]

  • Page 15

    15 Table 1 — Physical Data — 48AJ,AK,AW,AY Units (cont) LEGEND *Sizes 020-040 : Circuit 1 uses the lower por tion of con denser coil, Circuit 2 us es the upper portion. Sizes 041- 060: Circuit 1 uses the left co ndenser coil, Cir cuit 2 the right. All u nits hav e intertwined ev apor ator coils . †Rollout swit ch is manua l reset. UNIT 48AJ,A[...]

  • Page 16

    16 50AJ/AK020 4607 2090 8 7.7 2227 70.9 1 8 01 42.0 1067 4 8 AJ/AKD020 4697 21 3 1 8 7.7 2227 71.9 1 8 26 42.5 10 8 0 4 8 AJ/AKE020 477 7 2167 8 7.7 2227 72. 8 1 8 49 41.0 1041 50AW/A Y020 46 8 5 2125 8 7.7 2227 70.9 1 8 01 42.0 1067 4 8 AW/A YD020 47 3 7 2149 8 7.7 2227 71.9 1 8 26 42.5 10 8 0 4 8 AW/A YE020 4 8 17 21 8 5 8 7.7 2227 72. 8 1 8 49 4[...]

  • Page 17

    17 Table 2 — Unit Operating Weight s Table 3 — Opt ion and Accessory Weights Table 4 — Constant Volume Fan Mot or Weights LEGEND Table 5 — Vari able Volume Fan Motor Weights NO TES: 1. Base unit weight includes outdoor-air hoods. Base unit weight does NO T include indoor-fan motor . ADD indoor-fan motor , FIOPs, and accessories for T OT AL [...]

  • Page 18

    18 Table 6 — Evaporat or Fan Motor Dat a NO TES: 1. Motor shaf t speed is 1750 rpm. The fan shaft diam eter is 1 15 / 16 inches. 2. All i ndoor f an motors meet the minim um efficiency requirements as established b y the Energ y P oli cy Act of 1992 (EP ACT), effe ctiv e October 24, 1997. UNIT SIZE 48AJ,AK, AW, A Y MO T OR HP MO T OR SHAFT DIA. ([...]

  • Page 19

    19 Step 5 — Install Flue Hood 48 AJ ,A K, A W , A Y0 20 -0 50 UN IT S — Flue hood is shipped inside gas section of unit. T o in stall, secure flue hood to access panel. See Fig. 14. 48AJ,AK,A W ,A Y05 1 AND 060 UNITS — F lu e hoo d an d wind baffle are shipped inside gas section of unit. T o install, se- cure flue hood to access panel. Instal[...]

  • Page 20

    20 Size gas-supply piping for 0.5-in. wg maximum pressure drop. Do not use supply pipe smaller than unit gas connection. OP TIONAL ST AGED GAS UNITS — See T able 7 for staged gas information. Staging pattern is select ed during controls start-up. For complete information and service instructions for Staged Gas Control Units, see Control Operation[...]

  • Page 21

    21 Table 8A — Electrical Data — 48AJ,AK,AW,AY Units without Convenience Outlet See Legend and No tes on page 24. UNIT SIZE 48A V O LTA G E 3 PH, 60 Hz V O LTA G E RANGE COMPRESSOR CONDENSER F AN MOT OR EV APORA T O R FA N M O T O R PO W ER EXHA UST PO WER SUPPL Y Cir A, No. 1 Cir A, No. 2 Cir B, No. 1 Cir B, No. 2 Min Max RLA LRA RLA LRA RLA LR[...]

  • Page 22

    22 Table 8A — Electric al Data — 48AJ,AK, AW,AY Units without Convenience Outlet (cont) See Legend and No tes on page 24. UNIT SIZE 48A V O LTA G E 3 PH, 60 Hz VO L T AG E RANGE COMPRESSOR CONDENSER F AN MOT OR EV APORA T O R FA N M O T O R PO WER EXHA UST PO WER SUPPL Y Cir A, No. 1 Cir A, No. 2 C ir B, No. 1 Cir B, No. 2 Min Max RLA LRA RLA L[...]

  • Page 23

    23 Table 8A — Electric al Data — 48AJ,AK,AW,AY Unit s without Convenien ce Outlet (cont) See Legend and No tes on page 24. UNIT SIZE 48A V O LTA G E 3 PH, 60 Hz V O LTA G E RANGE COMPRESSOR CONDENSER F AN MOT OR EV APORA T O R FA N M O T O R PO W ER EXHA UST PO WER SUPPL Y Cir A, No. 1 Cir A, No. 2 Cir B, No. 1 Cir B, No. 2 Min Max RLA LRA RLA [...]

  • Page 24

    24 Table 8A — Electric al Data — 48AJ,AK, AW,AY Units without Convenience Outlet (cont) L EGEND *Fuse or HACR circuit breaker per NEC. NO TES: 1. In complianc e with NEC requirement s f or multimotor and co mbination load equip ment (refer to NEC Ar ticles 430 and 440), the overcurrent protective device for the unit shall be fu se or HA CR brea[...]

  • Page 25

    25 Table 8B — Electric al Data — 48AJ,AK,AW,AY Uni ts with Convenie nce Outlet See Legend and Notes on page 28. UNIT SIZE 48A VO L T AG E 3 PH, 60 Hz VO LT AG E RANGE COMPRESSOR CONDENSER F AN MOT OR EV APORA TOR F AN MOT OR PO WER EXHA UST CONVENIENCE OUTLET PO WER SUPPL Y Cir A, No. 1 Cir A, No. 2 Cir B, No. 1 Cir B, No. 2 Min Max RLA LRA RLA[...]

  • Page 26

    26 Table 8B — Ele ctrical Data — 48AJ,AK,A W,AY Units with Convenience Outlet (cont) See Legend and Notes on page 28. UNIT SIZE 48A V O LTA G E 3 PH, 60 Hz VO L T AGE RANGE COMPRESSOR CONDENSER F AN MOT OR EV APORA TOR F AN MOT OR PO WER EXHA UST CONVENIENCE OUTLET PO WER SUPPL Y Cir A, No. 1 C ir A, No. 2 Cir B, No. 1 Cir B, No. 2 Min Max RLA [...]

  • Page 27

    27 Table 8B — Elec trical Data — 48AJ,AK,AW ,AY Units with Convenience O utlet (cont) See Legend and Notes on page 28. UNIT SIZE 48A V O LTA G E 3 PH, 60 Hz VO L T AGE RANGE COMPRESSOR CONDENSER F AN MOT OR EV APORA TOR F AN MOT OR PO WER EXHA UST CONVENIENCE OUTLET PO WER SUPPL Y Cir A, No. 1 C ir A, No. 2 Cir B, No. 1 Cir B, No. 2 Min Max RLA[...]

  • Page 28

    28 Table 8B — Ele ctrical Data — 48AJ,AK,A W,AY Units with Convenience Outlet (cont) LE GEND *Fuse or HACR circuit break er per NEC . NO TES: 1. In compliance with NEC req uirements f or multi motor and combination lo ad equipment (ref er to NEC Articles 430 and 440), the ov ercurrent protectiv e device f or the unit shall be fuse or HA CR brea[...]

  • Page 29

    29 Routing Through Bott om of Unit — If wiring is brought in through bottom of unit, use field-supplied watertight conduit to route power wiring through the 3 1 / 2 -in. diameter hole provided in the unit basepan. Install conduit connector in unit basepan as shown in Fig. 4-9. Route power and ground lines through connector to terminal connections[...]

  • Page 30

    30 Staged Gas Control Option Thermistors — If the unit is equipped with the staged gas heat option, supply-air ther- mistors must be installed. Three supply-air thermistors are shipped with staged gas units and are inside the heating sec- tion. The supply-air thermistors should be located in the supply duct with the following criteria: • Downst[...]

  • Page 31

    31 T58 Communicating Thermostat — Carrier also has a fully communicating thermostat which, if used, will be wired to the CCN communication connections on TB3 as described in the Carrier Comfort Network ® Interface section below . Carrier Comfort Network In terface — The rooftop units can be connected to the CCN system. The communi cation bus w[...]

  • Page 32

    32 Step 9 — Make Outdoor -Air Inlet Adjustments ECONOMIZER AND FIXED OUTDOOR AIR DA MP ER — Hoods are used on all units with economizer or adjustable self-closing fixed outdoor air damper . NOTE: If accessory power exhaus t or barometric relief pack- ages are being added to the unit, install power exhaust or baro- metric relief before installin[...]

  • Page 33

    33 Step 10 — P osition P ower Exhaust/Bar ometric Relief Damper Hood — All units are shipped with the hoods folded inside the unit in a shipping position. For 48AJ, and AK units the hood must be tilted out once the unit is in- stalled. On 48A W , A Y units, (designed for horizontal supply and return) the assemblies will ha ve to be relocated to[...]

  • Page 34

    34 Step 11 — Route V A V Static Pressure Sensor s V A V DUCT PRESSURE TRANSDUCER — The V A V duc t pressure transducer (V A V inverter pressure transducer) is locat- ed behind the filter access door on the lower inner panel. See Fig. 33. A section of field-supplied 1 / 4 -in. plastic tubing must be run from the high pressure tap on the differen[...]

  • Page 35

    35 building, route the high tap to atmosphere and the low tap to building air . Step 12 — Install All Accessories — After all the factory-installed options have been adjusted, install all field- installed accessories. Refer to th e accessory installation instruc- tions included with each accessory . The 48A Series units have a large number of f[...]

  • Page 36

    Manufacturer reserves the right to disco ntinue, or change at any time, specificatio ns or designs without notice and without inc urring obligations. Catalog No . 04-53480067-0 1 Printed in U. S.A. F orm 48A-7SI Pg 36 8-0 9 Replaces: 48A-5SI Copy right 2009 Carrier Cor poration 3 1.25 ” IN S IDE RA 97.7 8” (020-050), 150.47 ” (051 AND 060) IN[...]