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Unico M Series Installation Manual
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Bulletin 30-20 / Dec. 2010© Copyright 2010 Unico, Inc.INSTALLATION MANUALFOR‘M’ SERIES MODULARAIR HANDLER UNITSIL00004a.CVNGENERALThe information on the following pages is to help theinstaller save time, provide the best possible installationand ensure continuous trouble-free operation.SCOPEThese instructions apply to the Unico “M” Series mod-ular air handler units. For heat pumps, refer to Bulletin30-24 for additional instructions. Installation instructionsfor the air distribution system are covered in Bulletin 30-05. Before beginning any installation a detailed systemlayout must be done in accordance with the System Siz-ing and Layout Procedure, Bulletin 40-40 and the Com-ponent Layout Instructions, Bulletin 40-30.NOTICE TO INSTALLER AND EQUIPMENTOWNER: RETAIN THIS MANUAL AT THE JOB.FULL BUILDING INSULATION IS ESSENTIALFOR THE MOST ECONOMICAL OPERATIONGENERAL PRECAUTIONS AND SAFETY TIPSDo not attempt to install or startup unit without firstreading and understanding the appropriate sections inthis manual.Before operating, be sure the unit is properly grounded.Installation should be in accordance with all local codesand regulations and with the National Board of Fire Un-derwriters regulations. In case of conflict, local codestake precedence.All electrical wiring should be in accordance with thelatest edition of the National Electrical Code and all lo-cal codes and regulations. The unit is safety certified toUL 1995 and listed with ETL.Always install a secondary drain pan when an overflowof condensate could cause damage.PART NUMBERSThis manual does not always include the latest revisionletter when referring to UPC part numbers. Refer to thelatest Price List and Spec Sheets for the current UPCrevision letter. For example, in UPC-00x the ‘x’ indi-cates the latest revision.INTRODUCTIONThe Unico System is a complete indoor comfort systemthat includes an indoor air handling unit and small ductsystem. The air handler and duct system were designedto operate together to provide the proper airflow in everyinstallation. The conditioned air is supplied through aseries of 2-inch ducts as a stream of air that entrains andmixes the room air. This process of aspiration produces amore even temperature distribution in the room.The Unico 'M' Modular Series air-handling units consistof various modules that are easily latched together. Themodules can be arranged in a vertical-up-flow, vertical-counter-flow and horizontal-flow configuration. Theycan be combined as a heating-only, cooling-only, orheating and cooling air handler unit. See Fig. 1.All insulated Unico System modules feature closed-cellinsulation for improved sound attenuation. There is noexposed fiberglass insulation.TABLE OF CONTENTSINTRODUCTION ................................................................... 1OPTIONS ............................................................................. 2UNPACKING ......................................................................... 2LOCATION ............................................................................ 3UNIT ASSEMBLY .................................................................. 4Anti-Frost Switch Wires .................................................. 4Fastening Modules Together .......................................... 4EC Motor Temperature Operating Limits ......................... 4Horizontal Installation ..................................................... 4Vertical Installation ......................................................... 5Control Box ..................................................................... 7Secondary Drain Pan ..................................................... 7MOUNTING ........................................................................... 8Horizontal Platform Mounting ......................................... 8Horizontal Suspended Mounting..................................... 8Vertical ........................................................................... 8DUCT CONNECTIONS ........................................................ 9Supply Plenum ............................................................. 10Return Duct .................................................................. 10Multiple Returns ............................................................ 10PIPING ................................................................................ 10Condensate Lines ........................................................ 10Refrigerant Lines .......................................................... 11Water Connections ....................................................... 13Coil Cleaning ................................................................ 13WIRING ............................................................................... 13Ventilation Speed Mode ............................................... 14STARTUP ............................................................................ 21Sequence of Operation................................................. 21Checking Airflow........................................................... 21Charging the System .................................................... 23Low Ambient Control Kit ............................................... 24R-410A Refrigerant ............................................................. 24Maintenance ....................................................................... 25Module Configuration Illustrations ........................................ 26 |
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