Carrier 39LH Installation, Start-up And Service Instructions Manual

Carrier 39LH Installation, Start-up And Service Instructions Manual Manual pdf 1 page image

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.Catalog No. 04-53390016-01 Printed in U.S.A. Form 39L-7SI Pg 1 816 3-14 Replaces: 39L-6SIInstallation, Start-Up andService InstructionsCONTENTSPageSAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 1,2INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8Unit Identification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2PREINSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-12Rigging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9Suspended Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9Service Clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9External Vibration Isolators. . . . . . . . . . . . . . . . . . . . . . . . . . . . .9INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13-35Base Rail Split . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Mixing Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Variable Frequency Drive (VFD) . . . . . . . . . . . . . . . . . . . . . . . 16Install Fan Motor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Install Sheaves on Motor and Fan Shafts . . . . . . . . . . . . . 16Install V-Belts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Water and Steam Coil Piping Recommendations . . . . . 19Coil Freeze-Up Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Refrigerant Piping, Direct Expansion (DX) Coils . . . . . . 24Electric Heaters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31Discharge Modification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35,36Check List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36-46General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36Fan Motor Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36Coil Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36Winter Shutdown (Chilled Water Coil Only) . . . . . . . . . . . 36Field-Installed Coils . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37Coil Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37Changing Coil Hand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42Fan Shaft Bearing Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 43Fan and Shaft Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45Fan Sled Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46METRIC CONVERSION CHART . . . . . . . . . . . . . . . . . . . . . . . 47SAFETY CONSIDERATIONSAir-handling equipment is designed to provide safe andreliable service when operated within design specifications. Toavoid injury to personnel and damage to equipment or propertywhen operating this equipment, use good judgment and followsafe practices as outlined below.DANGERNEVER enter an enclosed fan cabinet or reach into a unitwhile the fan is running.LOCK OPEN AND TAG the fan motor power disconnectswitch before working on a fan. Take fuses with you andnote removal on tag. Electric shock can cause personalinjury or death.LOCK OPEN AND TAG the electric heat coil power dis-connect switch before working on or near heaters.WARNINGCHECK the assembly and component weights to be surethat the rigging equipment can handle them safely. Notealso, the centers of gravity and any specific rigginginstructions.CHECK for adequate ventilation so that fumes will notmigrate through ductwork to occupied spaces when weld-ing or cutting inside air-handling unit cabinet or plenum.WHEN STEAM CLEANING COILS be sure that the areais clear of personnel.DO NOT attempt to handle access covers and removablepanels on outdoor units when winds are strong or gustinguntil you have sufficient help to control them. Make surepanels are properly secured while repairs are being made toa unit.DO NOT remove access panel fasteners until fan is com-pletely stopped. Pressure developed by a moving fan cancause excessive force against the panel which can injurepersonnel.DO NOT work on dampers until their operators aredisconnected.BE SURE that fans are properly grounded before workingon them.39LA,LB,LC,LD,LF,LG,LH03-25Indoor Air-Handling Units