Carrier 48AJ Manuel d'utilisateur

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.PC 1

10Fig. 8 — Base Unit Dimensions — 48AW,AY020-030NOTES:1. Weights include economizer (standard).2. Center of Gravity.3. Do not locate adjacent units wi

100Fig. 81 — Typical 48EJ CV 115-V Control Circuit

101Fig. 82 — Label Diagram — Staged Gas Heat — 48AJ,AK,AW,AY020-050 and 48EJ,EK,EW,EY024-048 Units

102Fig. 83 — Label Diagram — Staged Gas Heat — 48AJ,AK,AW,AY060 and 48EJ,EK,EW,EY054-068 Units

103TROUBLESHOOTINGTypical refrigerant circuiting diagrams are shown in Fig. 84-93. An algorithm diagram of the IGC (Integrated Gas Unit Controller)con

1044-Pass4-Pass 4-Pass4-Pass 4-Pass4-Pass 4-Pass4-Pass 4-Pass4-Pass 4-Pass4-Pass 4-Pass4-Pass 4-Pass4-Pass 4-Pass4-Pass 4-Pass4-Pass 4-Pass4-Pass 4-Pa

10512-Pass 4-Pass12-Pass 4-Pass12-Pass 4-Pass12-Pass 4-Pass12-Pass 4-Pass12-Pass 4-Pass12-Pass 4-Pass12-Pass 4-Pass12-Pass 4-Pass12-Pass 4-Pass12-Pass

106 LEGENDFig. 87 — Typical Refrigerant Circuiting (48EJ,EK,EW,EY038,044)FPS — Freeze Protection SwitchHPS — High-Pressure SwitchLPS

1078-Pass 4-Pass8-Pass 4-Pass8-Pass 4-Pass8-Pass 4-Pass8-Pass 4-Pass8-Pass 4-Pass8-Pass 4-Pass8-Pass 4-Pass8-Pass 4-Pass8-Pass 4-Pass8-Pass 4-Pass8-Pa

108 LEGENDFig. 89 — Typical Refrigerant Circuiting (48EJ,EK,EW,EY048)FPS — Freeze Protection SwitchHPS — High-Pressure SwitchL

109 LEGENDFig. 90 — Typical Refrigerant Circuiting (48EJ,EK,EW,EY054 and 058)HPS — High-Pressure SwitchLPS — Low-Pressure Swit

11Fig. 9 — Base Unit Dimensions — 48AW,AY035-050NOTES:1. Weights include economizer (standard).2. Center of Gravity.3. Do not locate adjacent units wi

1104-Pass6-Pass 4-Pass4-Pass 4-Pass6-Pass 4-Pass6-Pass 4-Pass4-Pass 4-Pass6-Pass 4-Pass6-Pass 4-Pass4-Pass 4-Pass6-Pass 4-Pass6-Pass 4-Pass4-Pass 4-Pa

111 LEGENDFig. 92 — Typical Refrigerant Circuiting (48EJ,EK,EW,EY064)HPS — High-Pressure SwitchLPS — Low-Pressure SwitchTXV —

112 Fig. 93 — Typical Refrigerant Circuiting (48EJ,EK,EW,EY068) LEGENDHPS — High-Pressure SwitchLPS

113 LEGENDNOTE: Thermostat Fan Switch in the “AUTO” position or sensor-equipped unit.Fig. 94 — IGC Control (Heating and Coolin

114The alarm codes for the IGC control board are shown inTable 44.Table 44 — IGC Control Board LED AlarmsDiagnostic LEDs — There are 3 LEDs (red, yell

115Tables 46-48 show the input and output channel designations.Table 46 — I/O Channel Designations Base Module — CVTable 47 — I/O Channel Designations

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.PC 1

CL-1START-UP CHECKLISTMODEL NO.: _________________________________ SERIAL NO.: ______________________________________SOFTWARE VERSION (SEE FIG. 27): _

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.PC 1

12Fig. 10 — Base Unit Dimensions — 48W,AY060NOTES:1. Weights include economizer (standard).2. Center of Gravity.3. Do not locate adjacent units with f

13Fig. 11 — Base Unit Dimensions — 48EJ,EK024-034NOTES:1. Weights include economizer (standard).2. Center of Gravity.3. Do not locate adjacent units w

14Fig. 12 — Base Unit Dimensions — 48EJ,EK038-048NOTES:1. Weights include economizer (standard).2. Center of Gravity.3. Do not locate adjacent units w

15Fig. 13 — Base Unit Dimensions — 48EJ,EK054-068NOTES:1. Weights include economizer (standard).2. Center of Gravity.3. Do not locate adjacent units w

16Fig. 14 — Base Unit Dimensions — 48EW,EY024-034NOTES:1. Weights include economizer (standard).2. Center of Gravity.3. Do not locate adjacent units w

17Fig. 15 — Base Unit Dimensions — 48EW,EY038-048NOTES:1. Weights include economizer (standard).2. Center of Gravity.3. Do not locate adjacent units w

18Fig. 16 — Base Unit Dimensions — 48EW,EY054-068NOTES:1. Weights include economizer (standard).2. Center of Gravity.3. Do not locate adjacent units w

1948AJ,AK,AW,AY UNITSFig. 17 — Rigging InformationUNITCENTER OF GRAVITYPERCENT OF TOTAL WEIGHTAT EACH CORNER (%)Inches MillimetersABAB1 2 3 448AJ,AKD0

2ROOF CURB — For vertical discharge units, assemble or in-stall accessory roof curb in accordance with instructionsshipped with this accessory. See Fi

2048EJ,EK,EW,EY UNITSRIGGING WEIGHTS48AJ,AK,AW,AY UNITS*Includes outdoor-air hoods, filters, largest available indoor-fanmotor, modulating power exhau

21Table 1A — Physical Data — 48AJ,AK,AW,AY Units LEGEND *Sizes 020-030: Circuit 1 uses the lower portion of condenser coil, Circuit 2

22Table 1A — Physical Data — 48AJ,AK,AW,AY Units (cont) LEGEND *Sizes 020-030: Circuit 1 uses the lower portion of condenser coil, Circ

23Table 1B — Physical Data — 48EJ,EK,EW,EY Units*Sizes 024-034: Circuit 1 uses the lower portion of condenser coil, Circuit 2 uses the upper portion.

24Table 1B — Physical Data — 48EJ,EK,EW,EY Units (cont)*Sizes 024-034: Circuit 1 uses the lower portion of condenser coil, Circuit 2 uses the upper po

25Table 1B — Physical Data — 48EJ,EK,EW,EY Units (cont)*Circuit 1 uses the left condenser coil. Circuit 2 the right. All units have intertwined evapor

26Table 2 — Operating Weights48AJ,AK,AW,AY Units 48EJ,EK,EW,EY Units LEGEND*Outdoor-air hoods and filters included in base unit weigh

27Table 3 — Evaporator Fan Motor DataNOTES:1. Motor shaft speed is 1750 rpm. The fan shaft diameter is 115/16 inches.2. All indoor fan motors meet the

28Step 5 — Install Flue Hood48AJ,AK,AW,AY020-050 AND 48EJ,EK,EW,EY024-048UNITS — Flue hood is shipped inside gas section of unit. Toinstall, secure fl

29Size gas-supply piping for 0.5-in. wg maximum pressuredrop. Do not use supply pipe smaller than unit gas connection.OPTIONAL STAGED GAS UNITS — The

3Fig. 1 — Roof Curb — 48AJ,AK020-030 and 48EJ,EK024-034 Units

30Table 5 — Controls Options and Configurations (Non-Thermostat Applications) LEGEND*With DIP Switch No. 5 configured to OPEN (Occupied

31Features with Thermostat Control of Unit• two-stage heating• two-stage cooling• control of unit using Y1, Y2, W1, W2, and G thermostatinputs• contro

32An electronic expansion board may be field-installed to pro-vide the following features:• provide discrete inputs for fan status, filter status, fie

33• control of one stage of heat to maintain return-air tem-perature at heating set point during occupied periods• provide a variable frequency drive

34 LEGEND*Where X is the unit control software version number.Fig. 27 — Control Board DiagramCCN — Carr

35Table 7 — Electrical Data — 48AJ,AK,AW,AY Units LEGEND*Fuse or HACR circuit breaker per NEC.NOTES:1. In compliance with N

36Table 7 — Electrical Data — 48AJ,AK,AW,AY Units (cont) LEGEND*Fuse or HACR circuit breaker per NEC.NOTES:1. In compliance

37Table 7 — Electrical Data — 48AJ,AK,AW,AY Units (cont) LEGEND*Fuse or HACR circuit breaker per NEC.NOTES:1. In compliance

38Table 7 — Electrical Data — 48AJ,AK,AW,AY Units (cont) LEGEND*Fuse or HACR circuit breaker per NEC.NOTES:1. In compliance

39Table 8 — Electrical Data — 48EJ,EK,EW,EY UnitsSee Legend and Notes on page 42.UNITSIZE48EJ,EK,EW,EYNOMNALVOLTAGE(3 Ph,60 Hz)VOLTAGERANGECOMPRESSORO

4Fig. 2 — Roof Curb — 48AJ,AK034-050 and 48EJ,EK038-048 Units

40Table 8 — Electrical Data — 48EJ,EK,EW,EY Units (cont)See Legend and Notes on page 42.UNITSIZE48EJ,EK,EW,EYNOMNALVOLTAGE(3 Ph,60 Hz)VOLTAGERANGECOMP

41Table 8 — Electrical Data — 48EJ,EK,EW,EY Units (cont)See Legend and Notes on page 42.UNITSIZE48EJ,EK,EW,EYNOMNALVOLTAGE(3 Ph,60 Hz)VOLTAGERANGECOMP

42Table 8 — Electrical Data — 48EJ,EK,EW,EY Units (cont) LEGEND*Fuse or HACR circuit breaker per NEC.NOTES:1. In compliance

43Routing Through Bottom of Unit — If wiring is brought inthrough bottom of unit, use field-supplied watertight conduit torun power wiring from basepa

44SEE DETAIL ADIP SWITCHES (FAR SIDE)SENSOR CONNECTIONLOCATIONR Y1 Y2 W1 W2 G C XDETAIL A(THERMOSTAT CONNECTIONLOCATION)TB3Fig. 29 — Control Box Diagr

45Thermostat Wiring (CV Only) — Install a Carrier-approvedaccessory thermostat assembly (per current price pages)according to the installation instruc

46LEGENDC—Compressor/Contactor FU — Fuse OFC — Outdoor-Fan ContactorCB — Circuit Breaker GND — Ground PEC — Power Exhaust ControllerCCB — Control Circ

47Conductors and drain wire must be 20 AWG minimumstranded, tinned copper. Individual conductors must be insulat-ed with PVC, PVC/nylon, vinyl, Teflon

48Step 10 — Make Outdoor-Air Inlet AdjustmentsECONOMIZERNOTE: If accessory power exhaust or barometric relief pack-ages are being added to the unit, i

49Perform the following procedure to assemble the economiz-er hood.1. Apply black seal strip (provided in package) to outsidetop-edge of hood sides. W

5Fig. 3 — Roof Curb — 48AJ,AK060 and 48EJ,EK054-068 Units

50Minimum Damper Position (MDP) Setting — Setting of theoutdoor air damper position is performed in conjunction with ashortened version of the field r

51ECONOMIZER SETTINGSAccessory Enthalpy Control (Fig. 46) — The control(HH57AC077) is mounted in the economizer hood. SeeFig. 37. The enthalpy setting

527. Route the wires from the enthalpy sensor to the return airenthalpy control through the holes on the inside of thehinged filter access panel. The

53 LEGENDRH — Relative HumidityFig. 48 — Psychrometric Chart for Enthalpy ControlNOTE: Partitions shown indicate both side supply (AW,AY,E

54Step 12 — Install All Accessories — After all thefactory-installed options have been adjusted, install all field-in-stalled accessories. Refer to t

55Install Motormaster® III Controls — Only one MotormasterIII control is required per unit.Motor — One outdoor-fan motor (OFM) must be changed outin t

56Fig. 53B — Motormaster® III Sensor Location(48AJ,AK,AW,AY035 and 48EJ,EK,EW,EY038, 044)Fig. 53C — Motormaster III Sensor Location(48AJ,AK,AW,AY040,

57Step 13 — Field ModificationsDUCTWORKBottom Return Units (48AJ,AK,EJ,EK) Field-Modified forSide Return — 48AJ,AK and 48EJ,EK units with bottom re-tu

58START-UPUse the following information and Start-Up Checklist onpages CL-1 and CL-2 to check out unit PRIOR to start-up.Unit Preparation — Check that

59Crankcase Heaters — Crankcase heaters are energizedas long as there is power to the unit, except when the compres-sors are operating.Variable Freque

6Fig. 4 — Roof Curb Adapter — (48AJ,AK060 and 48EJ,EK054-068 Units on 48DD,DF054-064 Retrofit, Part No. CRRCADPT005A00)NOTES:1. Unless otherwise speci

608. Press “READ/WRITE” key, to enter the new value. Thedesired set point value will alternately flash to indicatethat the new value has been stored.9

61Table 13 — Motor Electronic Thermal Protection (tHr) for Toshiba TOSVERT 130-E3 VFD*IFM Letter refers to the 15th digit (Motor Option) of the unit m

62Table 14 — Carrier VFD (Toshiba TOSVERT VF-S9) Program Parameter Values*These settings differ from the Toshiba defaults and are required for Carrier

63Power Exhaust — The optional non-modulating powerexhaust (CV only) is a two-stage design where the operation ofthe exhaust fans is linked to economi

64• DIP switch 6 configures the Time Guard® override and,when used with the field test function, sets the minimumdamper position• DIP switch 7 configu

65Table 18 — DIP Switch Factory Settings*On 48EJ,EW,AJ,AW units equipped with staged gas option, DIP switch 7 should be closed.Table 19 — Fan Performa

66Table 20 — Fan Performance, 48AJ,AK035 — Vertical Discharge Units LEGENDBhp — Brake HorsepowerNOTES:1. Fan performance is based on wet coil

67Table 21 — Fan Performance, 48AJ,AK040,050 — Vertical Discharge Units LEGENDBhp — Brake HorsepowerNOTES:1. Fan performance is based on wet

68Table 22 — Fan Performance, 48AJ,AK060 — Vertical Discharge Units LEGENDBhp — Brake HorsepowerNOTES:1. Fan performance is based on wet coil

69Table 23 — Fan Performance, 48AW,AY020-030 — Horizontal Discharge Units LEGENDBhp — Brake HorsepowerNOTES:1. Fan performance is based on we

7Fig. 5 — Base Unit Dimensions — 48AJ,AK020-030NOTES:1. Weights include economizer (standard).2. Center of Gravity.3. Do not locate adjacent units wit

70Table 24 — Fan Performance, 48AW,AY035 — Horizontal Discharge Units LEGENDBhp — Brake HorsepowerNOTES:1. Fan performance is based on wet co

71Table 25 — Fan Performance, 48AW,AY040,050 — Horizontal Discharge Units LEGENDBhp — Brake HorsepowerNOTES:1. Fan performance is based on we

72Table 26 — Fan Performance, 48AW,AY060 — Horizontal Discharge Units LEGENDBhp — Brake HorsepowerNOTES:1. Fan performance is based on wet co

73Table 27 — Fan Performance, 48EJ,EK024,034 — Vertical Discharge Units(For EW,EY units, reduce net available external static pressure by 0.3 in. wg)

74Table 28 — Fan Performance, 48EJ,EK038,044 — Vertical Discharge Units(For EW,EY units, reduce net available external static pressure by 0.5 in. wg)

75Table 29 — Fan Performance, 48EJ,EK048 — Vertical Discharge Units(For EW,EY units, reduce net available external static pressure by 0.5 in. wg)

76Table 30 — Fan Performance, 48EJ,EK054-068 — Vertical Discharge Units LEGENDBhp — Brake HorsepowerNOTES:1. Fan performance is based on dry

77Table 31 — Fan Performance, 48EW,EY054-068 — Horizontal Discharge Units LEGENDBhp — Brake HorsepowerNOTES:1. Fan performance is based on dr

78Table 32A — Fan Performance — Power Exhaust, 48AJ,AK,AW,AY020-050 and 48EJ,EK,EW,EY024-048 LEGENDTable 32B — Fan Performanc

79Table 33 — Motor Limitations LEGENDBhp — Brake HorsepowerNOTES:1. Extensive motor and electrical testing on the Carrier units hasensured

8Fig. 6 — Base Unit Dimensions — 48AJ,AK035-050NOTES:1. Weights include economizer (standard).2. Center of Gravity.3. Do not locate adjacent units wit

80Return-Air Filters — Check that correct filters are in-stalled in filter tracks (see Tables 1A and 1B). Do not operateunit without return-air filter

81Table 35 — User Defined Set Points LEGENDTable 36 — Software Control Link Points LEGENDSET POINTNAMEFORMAT DESCRIPTION LIMITS DEF

82The Time Guard® function maintains a minimum offtime of 5 minutes, a minimum ON time of 10 seconds, and aminimum delay before starting the second co

83GAS HEATING, VARIABLE AIR VOLUME (VAV)UNITS — All of the gas heating control is performed throughthe integrated gas control (IGC) board. The control

84Table 37 — Staged Gas System ComponentsTable 38 — Stage Gas System Inputs/OutputsOperating Modes — The SGC will operate the unit in one ofthe follow

85MORNING WARM-UP (VAV only with PC Accessed/CCNOperation) — Morning warm-up occurs when the control hasbeen programmed to turn on heat prior to the O

86Table 40 — Occupied Heat and Morning Warm-Up Operation and Controlling Factors LEGENDSPACE TEMPERATURE SENSOR CONTROL — If the un

87SUPPLY AIR TEMPERATURE RESET — Supply air tem-perature reset is used to reset the supply-air temperature utility.A 4 to 20 mA signal (field-supplie

88Table 41 — Smoke Control Modes LEGENDHEAD PRESSURE CONTROL — Each unit has a fan cy-cling, outdoor thermostat to shut off the out

89If a Y2 (or Y2_SPT) call begins while the unit was under“Y1 cooling” control, compressor no. 2 will not be started until“Y1 cooling” control has end

9Fig. 7 — Base Unit Dimensions — 48AJ,AK060NOTES:1. Weights include economizer (standard).2. Center of Gravity.3. Do not locate adjacent units with fl

90To inspect blower wheel, remove heat exchanger accesspanel. Shine a flashlight into opening to inspect wheel. If clean-ing is required, remove motor

91LubricationCOMPRESSORS — Each compressor is charged with thecorrect amount of oil at the factory. The correct oil charge isshown in Tables 1A and 1B

925. Be sure that hub flanges, flex members, spacer, and hard-ware are clean and free of oil.6. Place the flanges onto the shafts with the hub facing

93Power Failure — The economizer damper motor is aspring return design. In event of power failure, dampers will re-turn to fully closed position until

94Main Burners — For all applications, main burners arefactory set and should require no adjustment.MAIN BURNER REMOVAL (Fig. 76)1. Shut off (field-su

95Filter Drier — Replace whenever refrigerant system is ex-posed to atmosphere.Protective DevicesCOMPRESSOR PROTECTIONOvercurrent — Each compressor ha

96Fig. 77 — Typical Power Schematic 48EJ,EK,EW,EY024-034; 208/230-3-60 and 460-3-60NOTES:1. Connect TRAN1 to H4 for 460 v units. Connect toH3 for 230

97Fig. 78 — Typical 48EK VAV 24-V Control Circuit

98NOTE: Red wire and violet wire are spliced together at the factory. The brown wire has a wire nut added at the factory.Fig. 79 — Typical CV 24-V Con

99Fig. 80 — Typical 48EK VAV 115-V Control Circuit