Carrier CRECOMZR052A00 Installation Instructions Manual

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.Catalog No. 04-53480314-01 Printed in U.S.A. Form IIK-CRECOMZR52-02 Pg 1 8-21 Replaces: IIK-CRECOMZR52-01Installation InstructionsPart No. CRECOMZR052A00 and CRECOMZR053A00CONTENTSPageSAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1PACKAGE USAGE AND CONTENTS . . . . . . . . . . . . . 2GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3ACCESSORIES LIST . . . . . . . . . . . . . . . . . . . . . . . . . . 4VERTICAL INSTALLATION . . . . . . . . . . . . . . . . . . . . . 4HORIZONTAL INSTALLATION . . . . . . . . . . . . . . . . . . 8Barometric Hood Assembly . . . . . . . . . . . . . . . . . . . 12• BAROMETRIC HOOD (VERTICAL CONFIGURATION)• BAROMETRIC HOOD (HORIZONTALCONFIGURATION)CONFIGURATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 16EconoMi$er IV Standard Sensors . . . . . . . . . . . . . . 16• OUTDOOR AIR TEMPERATURE (OAT) SENSOR• SUPPLY AIR TEMPERATURE (SAT) SENSOR• LOW TEMPERATURE COMPRESSOR LOCKOUTSWITCH• ECONOMI$ER IV CONTROL MODES• OUTDOOR DRY BULB CHANGEOVER• OUTDOOR ENTHALPY CHANGEOVER• DIFFERENTIAL ENTHALPY CONTROL• INDOOR AIR QUALITY (IAQ) SENSOR INPUT• EXHAUST SET POINT ADJUSTMENT• MINIMUM POSITION CONTROL• DAMPER MOVEMENT• THERMOSTATS• OCCUPANCY CONTROL• DEMAND CONTROLLED VENTILATION• CO2 SENSOR CONFIGURATION• DEHUMIDIFICATION OF FRESH AIR WITH DCVCONTROLOPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . 22TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . 22EconoMi$er IV System Preparation . . . . . . . . . . . . . 22Differential Enthalpy . . . . . . . . . . . . . . . . . . . . . . . . . 22Single Enthalpy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22DCV (Demand Controlled Ventilation) and PowerExhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22DCV Minimum and Maximum Position . . . . . . . . . . 23Supply-Air Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23EconoMi$er IV Troubleshooting Completion . . . . . 23SAFETY CONSIDERATIONSInstallation and servicing of air-conditioning equipment can behazardous due to system pressure and electrical components. Onlytrained and qualified service personnel should install, repair, orservice air-conditioning equipment.Untrained personnel can perform basic maintenance functions ofcleaning coils and filters and replacing filters. All other operationsshould be performed by trained service personnel. When workingon air-conditioning equipment, observe precautions in theliterature, tags and labels attached to the unit, and other safetyprecautions that may apply.Follow all safety codes, including ANSI (American NationalStandards Institute) Z223.1. Wear safety glasses and work gloves.Use quenching cloth for unbrazing operations. Have fireextinguisher available for all brazing operations.It is important to recognize safety information. This is the safety-alert symbol . When you see this symbol on the unit and ininstructions or manuals, be alert to the potential for personalinjury.Understand the signal words DANGER, WARNING, CAUTION,and NOTE. These words are used with the safety-alert symbol.DANGER identifies the most serious hazards which will result insevere personal injury or death. WARNING signifies hazardswhich could result in personal injury or death. CAUTION is usedto identify unsafe practices, which may result in minor personalinjury or product and property damage. NOTE is used to highlightsuggestions which will result in enhanced installation, reliability,or operation.IMPORTANT: Read these instructions completely beforeattempting to install the EconoMi$er® IV accessory.WARNINGELECTRICAL SHOCK HAZARDFailure to follow this warning could result in personal injuryand/or death.Before beginning any modification, be certain that the main-line electrical disconnect switch is in the OFF position. Closethe main gas supply shutoff valve. Tag disconnect switch andgas valve with suitable warning labels.WARNINGELECTRICAL OPERATION HAZARDFailure to follow this warning could result in personal injury ordeath.Disconnect power supply and install lockout tag before at-tempting to install accessory.Vertical and Horizontal Low Leak EconoMi$er® IV Accessoryfor Medium Rooftop Units15 to 27.5 Tons