Carrier 48TJD User Manual

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

10LEGENDFig. 11 — Power Wiring ConnectionsC—ContactorCOMP —CompressorNEC —National Electrical CodeTB —Terminal BlockFig. 12 — Low-Voltage Connections

11Table 2 — Electrical Data LEGEND*Used to determine minimum disconnect per NEC.†Fuse or HACR circuit breaker.NOTES:1. In

12Step 8 — Make Outdoor-Air Adjustments andInstall Outdoor-Air HoodMANUAL OUTDOOR-AIR DAMPER — The outdoor-airhood and screen are attached to the bas

13OPTIONAL DURABLADE ECONOMIZER — The option-al economizer hood assembly is packaged and shipped in the fil-ter section. Damper blades and control boa

14ECONOMIZERCONTROLBOARDECONOMIZERPLUGECONOMIZERMOTORTOPSCREWBAROMETRICRELIEF DAMPERWIRINGHARNESSPOSITION SETTINGBRACKETU-SHAPEDHOLE(NOTSHOWN)SHIPPING

15OPTIONAL ECONOMI$ER — See Fig. 26 for EconoMi$ercomponent locations.1. To remove the existing unit filter access panel, raise thepanel and swing the

165. Slide the outdoor-air inlet screens into the screen track onthe hood side panels. While holding the screens in place,fasten the screen retainer t

17OUTDOORAIRSENSORTEMPTEMPCOMOUTPWRBROWNVIOLETWHITEREDBROWNTEMPTEMPCOMOUTPWRRETURNAIRSENSORVIOLETWHITEREDOATCOMOAH-15 VRATCOMRAH+15 VECONOMI$ERCONTROL

184-PINCONNECTORPLUGL1L2GREEN11223344GND230 VAC1 PHASEGREEN/YELLOW3215869BA74LT. BLUEBLACKBROWNC1BLUEGREEN/YELLOW3215869BA74LT. BLUEBLACKBROWNC1BLUEFA

19CO2 Control Set Up — If a CO2 sensor is not being used,proceed to the next section. If a CO2 sensor is being used, per-form the following:1. Determi

2Curb should be level. Unit leveling tolerances are shown inFig. 3. This is necessary for unit drain to function properly. Re-fer to Accessory Roof Cu

20Step 9 — Adjust Evaporator-Fan Speed — Ad-just evaporator-fan rpm to meet jobsite conditions. Table 5shows fan rpm at motor pulley settings. Table 6

21Table 5 — Fan Rpm at Motor Pulley Settings**Approximate fan rpm shown.†Indicates alternate motor and drive package.**Indicates high-static motor and

22Table 8 — Fan Performance 48TJ004 — Vertical Discharge Units, Standard Motor LEGENDNOTES:1. Values include losses for filte

23Table 10 — Fan Performance 48TJ004 — Vertical Discharge Units, High-Static Motor LEGEND*Motor drive range is 1075 to 1455

24Table 12 — Fan Performance 48TJ005 — Vertical Discharge Units, Alternate Motor LEGEND*Motor drive range is 835 to 118

25Table 14 — Fan Performance 48TJ006 — Vertical Discharge Units, Standard Motor LEGENDNOTES:1. Values include losses for filt

26Table 16 — Fan Performance 48TJ006 — Vertical Discharge Units, High-Static Motor LEGEND*Motor drive range is 1300 to 1685 rpm

27Table 17 — Fan Performance 48TJ007 — Vertical Discharge Units, Standard Motor LEGEND*Motor drive range is 1070 to 1460 rpm. A

28Table 18 — Fan Performance 48TJ007 — Vertical Discharge Units, High-Static Motor LEGEND*Motor drive range is 1300 to 1685 r

29Table 19 — Fan Performance 48TJ004 — Horizontal Discharge Units, Standard Motor LEGENDNOTES:1. Values include losses for filt

3TO ENSURE AIRTIGHT CONNECTIONPLACE UNIT AS CLOSE TOEND AS POSSIBLE.TO ENSURE AIRTIGHT CONNECTIONPLACE UNIT AS CLOSE TOEND AS POSSIBLE.Fig. 2 — Roof C

30Table 21 — Fan Performance 48TJ004 — Horizontal Discharge Units, High-Static Motor LEGEND*Motor drive range is 1075 to 1455 rpm.

31Table 22 — Fan Performance 48TJ005 — Horizontal Discharge Units, Standard Motor LEGENDNOTES:1. Values include losses for filt

32Table 24 — Fan Performance 48TJ005 — Horizontal Discharge Units, High-Static Motor LEGEND*Motor drive range is 1075 to 1455 rpm.

33Table 26 — Fan Performance 48TJ006 — Horizontal Discharge Units, Alternate Motor LEGEND*Motor drive range is 900 to 1300 rpm. Al

34Table 27 — Fan Performance 48TJ006 — Horizontal Discharge Units, High-Static Motor LEGEND*Motor drive range is 1300 to 1685 rpm.

35Table 28 — Fan Performance 48TJ007 — Horizontal Discharge Units, Standard Motor LEGEND*Motor drive range is 1070 to 1460 rpm. Al

36Table 29 — Fan Performance 48TJ007 — Horizontal Discharge Units, High-Static Motor LEGEND*Motor drive range is 1300 to 1685 rpm.

37START-UPUnit Preparation — Make sure that unit has been in-stalled in accordance with these installation instructions andapplicable codes.Return-Air

38Heating1. Purge gas supply line of air by opening union ahead ofgas valve. If gas odor is detected, tighten union and wait5 minutes before proceedin

39Safety Relief — A soft solder joint at the suction serviceSchrader port provides pressure relief under abnormal tempera-ture and pressure conditions

4POSITIONING — Maintain clearance around and above unitto provide minimum distance from combustible materials,proper airflow, and service access. See

40SERVICECleaning — Inspect unit interior at the beginning of heat-ing and cooling season and as operating conditions require.EVAPORATOR COIL1. Turn u

41LubricationCOMPRESSORS — Each compressor is charged with thecorrect amount of oil at the factory.FAN-MOTOR BEARINGS — Fan-motor bearings are ofth

42Fig. 49 — Cooling Charging Chart, 48TJ004Fig. 50 — Cooling Charging Chart, 48TJ005Fig. 51 — Cooling Charging Chart, 48TJ006Fig. 52 — Cooling Chargin

43Combustion-Air Blower — Clean periodically to as-sure proper airflow and heating efficiency. Inspect blowerwheel every fall and periodically during

44Fig. 54 — Burner Tray DetailsFig. 55 — Spark AdjustmentLOW HEAT48TJE004, 48TJD005-007 — 74,000 BTUH INPUTMEDIUM ANDHIGH HEAT48TJE005-007, 48TJF004 —

45TROUBLESHOOTINGTable 32 — LED Error Code Service Analysis LEGENDTable 33 — Heating Service AnalysisSYMPTOM CAUSE REMEDYHardwar

46Table 34 — Cooling Service AnalysisPROBLEM CAUSE REMEDYCompressor and condenser fanwill not start.Power failure. Call power company.Fuse blown or ci

47Table 35 — Durablade Economizer Troubleshooting PROBLEM CAUSE REMEDYDamper does notopen.Indoor (evaporator) fan is off. 1. Check to ensure that

48Table 36 — EconoMi$er TroubleshootingLEGENDPL — PlugPROBLEM POTENTIAL CAUSE REMEDYDamper Does NotOpenIndoor (Evaporator) Fan is Off Check to ensure

49Fig. 56 — Typical Wiring Diagram and Component Arrangement

5Step 7 — Make Electrical ConnectionsDISCONNECT BOX LOCATION — The field-supplied dis-connect box may be mounted on the unit’s end panel or on thecorn

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

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

6Table 1 — Physical Data LEGEND*Evaporator coil fin material/condenser coil fin material. Contact your localrepresentative for details abo

7Table 1 — Physical data (cont) LEGEND*Evaporator coil fin material/condenser coil fin material. Contact your localrepresentative for det

8UNIT48TJSTANDARDUNITWEIGHTDURABLADEECONOMIZERWEIGHTECONOMI$ERWEIGHTCORNERWEIGHT(A)CORNERWEIGHT(B)CORNERWEIGHT(C)CORNERWEIGHT(D)Lb Kg Lb Kg Lb Kg Lb K

9Voltage to compressor terminals during operation must bewithin voltage range indicated on unit nameplate (see Table 2).On 3-phase units, voltages bet