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Carrier EK, 48EJ, EW Ð Control Box Diagram Sizes, Ð Field Control Temperature Sensor Wiring

Models: EY024-048 EK 48EJ

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Fig. 19 Ð Control Box Diagram (Sizes 038-048)

		LEGEND
C	Ð Contactor/Compressor	IF	Ð Indoor Fan
CB	Ð Circuit Breaker	OF	Ð Outdoor Fan
DIP	Ð Dual In-Line Package	PEC	Ð Power Exhaust Controller
FU	Ð Fuse	TB	Ð Terminal Block
HR	Ð Heater Relay	TRAN Ð Transformer

Fig. 19 Ð Control Box Diagram (Sizes 038-048)

NOTE: Sensor part numbers are as follows:

T-55 Ð CEC0121448-01

T-56 Ð CEC0121503-01

Fig. 21 Ð Field Control Temperature Sensor Wiring

(CV or VAV Units)

Fig. 20 Ð Field Control Thermostat Wiring

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Carrier EK, 48EJ, EW, EY024-048 Ð Control Box Diagram Sizes, Ð Field Control Temperature Sensor Wiring, CV or VAV Units

Contents

INSTALLATION Step 1 Ð Provide Unit Support CONTENTSSAFETY CONSIDERATIONS Step 10 Ð Position Power Exhaust/BarometricStep 3 Ð Field Fabricate Ductwork Instructions continued on pageUNIT LEVELING TOLERANCES DIMENSIONS Fig. 1 Ð Roof Curb SizesDegrees and Inches UNIT LEVELING TOLERANCES DIMENSIONS Fig. 2 Ð Roof Curb SizesDegrees and Inches Fig. 3 Ð Base Unit Dimensions, 48EJ,EK024-034 Fig. 4 Ð Base Unit Dimensions, 48EJ,EK038-048 Fig. 5 Ð Base Unit Dimensions, 48EW,EY024-034 Fig. 6 Ð Base Unit Dimensions, 48EW,EY038-048 NOTICE TO RIGGERS ALL PANELS MUST BE IN PLACE WHEN RIGGINGFig. 7 Ð Rigging Label Table 1 Ð Physical Data Table 1 Ð Physical Data cont Fig. 9 Ð Air Distribution Ð Thru-the-Side Fig. 8 Ð Air Distribution Ð Thru-the-BottomFig. 10 Ð Flue Hood Location Typical Roof Curb or Slab Mount Shown Fig. 11 Ð Combustion Fan Housing LocationFig. 12 Ð Condensate Drain Trap Piping Details Fig. 13 Ð Field Gas Piping·support a eld test for eld checkout Fig. 14 Ð Field Control Remote Start/Stop Fig. 15 Ð Indoor Air Quality Sensor CongurationStep 8 Ð Make Electrical Connections Fig. 16 Ð Control Board Diagram Table 4 Ð Electrical Data Table 4 Ð Electrical Data cont Table 4 Ð Electrical Data cont UNITFig. 17 Ð Field Power Wiring Connections Fig. 18 Ð Control Box Diagram SizesFig. 20 Ð Field Control Thermostat Wiring Fig. 19 Ð Control Box Diagram SizesFig. 21 Ð Field Control Temperature Sensor Wiring CV or VAV UnitsFig. 22 Ð Space Temperature Averaging Wiring Table 5 Ð CCN Connection Approved Shielded CablesStep 9 Ð Make Outdoor-AirInlet Adjustments Table 6 Ð Color Code RecommendationsHood Sides Fig. 23 Ð Adding Seal Strip to Top of Hood SidesFig. 25 Ð Adding Seal Strip to Mounting Flange of Fig. 26 Ð Adding Seal Strip to Hood TopFig. 29 Ð Adding Foam Strip to Blockoff Baffle to Filter Track AssemblyFig. 28 Ð Adding Foam Strip to Hood Side Fig. 30 Ð Mounting Angle Without Tabs AttachedFig. 31 Ð Mounting Angle With Tabs Attached to Filter Track AssemblyFig. 32 Ð Attaching Seal Strip to Filter Cover Enthalpy Control HH57AC077 Fig. 34 Ð Wiring Connections for Solid-StateFig. 35 Ð Psychrometric Chart for Enthalpy ControlFig. 37 Ð Barometric Relief Damper and Power Exhaust Mounting DetailsFig. 38 Ð Pressure Transducer Locations Fig. 39 Ð Motormaster III Baffle DetailsSTART-UP Fig. 41 Ð VFD Factory-InstalledJumpers Table 7 Ð VFD Supply Air Pressure Set PointDirect Digital Controls DIP Switch Congura Table 8 Ð Potentiometer Signal LevelsTable 10 Ð DIP Switch Conguration Table 9 Ð Power Exhaust Default Set PointsTable 11 Ð DIP Switch Factory Settings AIRFLOW AIRFLOW 3.20 Table 15 Ð Fan Performance Ð Power Exhaust Table 16 Ð Motor LimitationsSequence of Operation Table 17 Ð Air Quantity LimitsTable 18 Ð User Dened Set Points GAS HEATING, VARIABLE AIR VOLUME VAV UNITS Fig. 42 Ð Heat Interlock Relay Wiring Fig. 43 Ð Space Temperature Reset WiringFig. 44 Ð Field-SuppliedSmoke Detector Wiring Table 19 Ð Smoke Control Modeswith 2 Compressors and 2 Unloaders SERVICEwith 2 Compressors Fig. 45 Ð Door LatchFig. 46 Ð Spark Gap Adjustment LubricationEvaporator Fan Performance Adjustment Evaporator Fan Service and ReplacementBelt Tension Adjustment Ð To adjust belt tension Fig. 47 Ð Typical Gas Heating SectionGas Valve Adjustment Evaporator-FanMotor ReplacementCondenser-FanAdjustment Fig. 49 Ð Evaporator-FanAlignment and AdjustmentFig. 52 Ð Cooling Charging Chart Fig. 50 Ð Belt Tension AdjustmentFig. 51 Ð Condenser-FanAdjustment Fig. 53 Ð Cooling Charging ChartFig. 54 Ð Gas Valve Fig. 55 Ð Main Burner Removal Ð Adjustable Heat Anticipator Page Fig. 57 Ð Typical VAV 115-vControl Circuit Fig. 58 Ð Typical CV 115-vControl Circuit Fig. 59 Ð Typical VAV 24-vControl Circuit Fig. 60 Ð Typical CV 24-vControl Circuit TROUBLESHOOTING HPS Ð High-PressureSwitch LEGEND FPS Ð Freeze Protection SwitchLPS Ð Low-PressureSwitch HPS Ð High-PressureSwitch LEGEND FPS Ð Freeze Protection SwitchLPS Ð Low-PressureSwitch LEGEND IDM Ð Induced-DraftMotor Fig. 64 Ð IGC Control Heating and CoolingIGC Ð Integrated Gas Unit Controller Table 22 Ð IGC Control Board LED Alarms Table 23 Ð Control Board LED AlarmsPage PACKAGED SERVICE TRAINING ELECTRICAL TEMPERATURESPRE-START-UP PRESSURESGENERAL