Carrier 50GL030 Installation, Start-up, And Operating Instructions Manual

Also see for 50GL030: Installation and operating instructions Manual Operating and maintaining guide Guide to operating and maintaining

Contents

50GL3-Phase Single-Packaged Air Conditionerwith Puron® (R-410A) RefrigerantInstallation, Start-Up, and Operating InstructionsSizes 030-060NOTE: Read the entire instruction manual before starting theinstallation.TABLE OF CONTENTSIndex PageSAFETY CONSIDERATIONS .....................................................1RULES FOR SAFE INSTALLATION AND OPERATION....1-4GENERAL ................................................................................4RECEIVING AND INSTALLATION.....................................4-10CHECK EQUIPMENT ..................................................................4IDENTIFY UNIT......................................................................4INSPECT SHIPMENT .............................................................4PROVIDE UNIT SUPPORT .........................................................4ROOF CURB ............................................................................4SLAB MOUNT.........................................................................4GROUND LEVEL....................................................................4FIELD FABRICATE DUCTWORK.............................................4PROVIDE CLEARANCES ...........................................................4RIG AND PLACE UNIT ..............................................................4INSPECTION............................................................................4INSTALLATION ..................................................................4-6CONNECT CONDENSATE DRAIN ...........................................6INSTALL DUCT CONNECTIONS ..........................................6-8CONFIGURING UNITS FOR DOWNFLOW (VERTICAL)DISCHARGE ..............................................................................7-8INSTALL ELECTRICAL CONNECTIONS...........................8-10HIGH-VOLTAGE CONNECTIONS..................................8-10STANDARD CONNECTION................................................10SPECIAL PROCEDURES FOR 208-V OPERATION.........10CONTROL VOLTAGE CONNECTIONS ............................10TRANSFORMER PROTECTION .........................................10PRE-START-UP ..........................................................................11START-UP..............................................................................11-14MAINTENANCE....................................................................15-20TROUBLESHOOTING ...............................................................22START-UP CHECKLIST............................................................23NOTE TO INSTALLER — Before the installation, READ THESEINSTRUCTIONS CAREFULLY AND COMPLETELY. Also,make sure the User’s Manual and Replacement Guide are left withthe unit after installation.SAFETY CONSIDERATIONSInstallation and servicing of air-conditioning equipment can behazardous due to system pressure and electrical components. Onlytrained and qualified personnel should install, repair, or serviceair-conditioning equipment.Untrained personnel can perform basic maintenance functions ofcleaning coils and filters. All other operations should be performedby trained service personnel. When working on air-conditioningequipment, observe precautions in the literature, tags and labelsattached to the unit, and other safety precautions that may apply.Follow all safety codes. Wear safety glasses and work gloves. Usequenching cloth for unbrazing operations. Have fire extinguisheravailable for all brazing operations. Consult a qualified installer orservice agency for information or assistance. The qualified in-staller or agency must use only factory-authorized kits or acces-sories when modifying this product.Before performing service or maintenance operations onsystem, turn off power to unit. Turn off accessory heaterpower switch, if applicable. Electrical shock can causeserious injury or death.Puron (R-410A) systems operate at higher pressures thanstandard R-22 systems. Do not use R-22 service equipment orcomponents on Puron (R-410A) equipment. Ensure serviceequipment is rated for Puron (R-410A).RULES FOR SAFE INSTALLATION AND OPERATIONRecognize safety information. This is the safety-alert symbol .When you see this symbol in instructions or manuals, be alert tothe potential for personal injury.Understand the signal words DANGER, WARNING, CAUTION,IMPORTANT, and NOTE. These words are used with the safety-alert symbol. DANGER identifies the most serious hazards whichwill result in severe injury or death. WARNING signifies a hazardwhich could result in serious injury or death. CAUTION is used toidentify unsafe practices which would result in minor personalFig. 1—Model 50GLC99064Visit www.carrier.comManufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.Book 1 4Tab 1b 1a PC 101 Printed in U.S.A. Catalog No. 50GL-2SI Pg 1 2-06 Replaces: New