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Carrier 48EJ, EW, EK, EY024-048 installation instructions General

Models: EY024-048 EK 48EJ

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GENERAL

SET ECONOMIZER MINIMUM VENT POSITION TO JOB REQUIREMENTS

ENSURE DRIVES OPERATE WITHIN LIMITS OF FAN PERFORMANCE TABLES


HIGH PRESSURE SWITCH SETTING				psig
LOW PRESSURE SWITCH SETTING				psig
MOTOR PULLEY PART NUMBER
FAN PULLEY PART NUMBER
BELT PART NUMBER
BELT SIZE				in.
FILTER QUANTITY
FILTER SIZES				in.

ADDITIONAL NOTES:

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Copyright 1997 Carrier Corporation

Manufacturer reserves the right to discontinue, or change at any time, speci®cations or designs without notice and without incurring obligations.

Book	1		PC 111	Catalog No. 564-962	Printed in U.S.A.	Form 48E-5SI	Pg CL-2	8-97	Replaces: 48E-3SI
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Carrier 48EJ, EW, EK, EY024-048 installation instructions General

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