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Carrier 48EJ, EW, EK, EY024-048 Ð Wiring Connections for Solid-State, Enthalpy Control HH57AC077

Models: EY024-048 EK 48EJ

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Fig. 34 Ð Wiring Connections for Solid-State

	CONTROL	CONTROL POINT
	CONTROL	(APPROX. DEG.)
	CURVE	(APPROX. DEG.)
	CURVE	AT 50% RH
		AT 50% RH

	A	73 (23)
	B	70 (21)

	C	67 (19)

	D	63 (17)

NOTE: Switches shown in high enthalpy state. Terminals 2 and 3 close on enthalpy decrease.

Fig. 34 Ð Wiring Connections for Solid-State

Enthalpy Control (HH57AC077)

RH Ð Relative Humidity

Fig. 35 Ð Psychrometric Chart for

Enthalpy Control

NOTE: Partitions shown indicate both side supply (EW/EY) and ver- tical supply (EJ/EK) units.

Fig. 36 Ð Economizer Details

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Carrier 48EJ, EW, EK, EY024-048 Ð Wiring Connections for Solid-State, Enthalpy Control HH57AC077, Ð Psychrometric Chart for

Contents

CONTENTS SAFETY CONSIDERATIONSINSTALLATION Step 1 Ð Provide Unit Support 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 Fig. 11 Ð Combustion Fan Housing Location Fig. 12 Ð Condensate Drain Trap Piping DetailsTypical Roof Curb or Slab Mount Shown 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. 19 Ð Control Box Diagram Sizes Fig. 21 Ð Field Control Temperature Sensor WiringFig. 20 Ð Field Control Thermostat 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 RecommendationsFig. 23 Ð Adding Seal Strip to Top of Hood Sides Fig. 25 Ð Adding Seal Strip to Mounting Flange ofHood Sides Fig. 26 Ð Adding Seal Strip to Hood Topto Filter Track Assembly Fig. 28 Ð Adding Foam Strip to Hood SideFig. 29 Ð Adding Foam Strip to Blockoff Baffle 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 Fig. 34 Ð Wiring Connections for Solid-State Fig. 35 Ð Psychrometric Chart forEnthalpy Control HH57AC077 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 ModesSERVICE with 2 Compressorswith 2 Compressors and 2 Unloaders Fig. 45 Ð Door LatchFig. 46 Ð Spark Gap Adjustment LubricationEvaporator Fan Service and Replacement Belt Tension Adjustment Ð To adjust belt tensionEvaporator Fan Performance Adjustment Fig. 47 Ð Typical Gas Heating SectionEvaporator-FanMotor Replacement Condenser-FanAdjustmentGas Valve Adjustment Fig. 49 Ð Evaporator-FanAlignment and AdjustmentFig. 50 Ð Belt Tension Adjustment Fig. 51 Ð Condenser-FanAdjustmentFig. 52 Ð Cooling Charging Chart 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 TEMPERATURES PRE-START-UPELECTRICAL PRESSURESGENERAL