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

Also see for 50HX Guide: Manual

50HXSingle Packaged Heat Pump UnitsInstallation, Start-Up, and Operating Instructions50HX Sizes 024-060NOTE: Read the entire instruction manual before starting theinstallation.This symbol → indicates a change since the last issue.TABLE OF CONTENTSSAFETY CONSIDERATIONS .....................................................1Introduction ....................................................................................2RECEIVING AND INSTALLATION ..........................................2Check Equipment......................................................................2IDENTIFY UNIT ................................................................2INSPECT SHIPMENT ........................................................2Provide Unit Support ................................................................2ROOF CURB & SLAB MOUNT.......................................2Provide Clearances....................................................................2Select and Install Ductwork .....................................................2Rig and Place Unit....................................................................3INSTALLATION ................................................................5Connect Condensate Drain .......................................................6Install Duct Connections ..........................................................7CONFIGURING UNITS FOR DOWNFLOW (VERTI-CAL) DISCHARGE-STANDARD UNITS (024–042)......8CONFIGURING UNITS FOR DOWNFLOW (VERTI-CAL) DISCHARGE-ECM UNITS (048–060).................10Install Electrical Connection ..................................................12HIGH-VOLTAGE & CONTROL-VOLTAGE CONNEC-TIONS................................................................................14SPECIAL PROCEDURES FOR 208-V OPERATION ...15PRE-START-UP ..........................................................................19START-UP ...................................................................................19CHECK FOR REFRIGERANT LEAKS..........................19START UP AND MAKE ADJUSTMENTS....................20CHECKING COOLING CONTROL OPERATION .......20CHECKING HEATING CONTROL OPERATION........20CHECKING AND ADJUSTING REFRIGERANTCHARGE ...........................................................................20INDOOR AIRFLOW AND AIRFLOW ADJUST-MENTS ..............................................................................23For 208/230v-PSC Blower Motor.....................................23For 208/230v-ECM Blower Motor ...................................23COOLING SEQUENCE OF OPERATION.....................23HEATING SEQUENCE OF OPERATION .....................25MAINTENANCE.........................................................................25AIR FILTER......................................................................25UNIT TOP REMOVAL ....................................................26INDOOR BLOWER AND MOTOR ................................26OUTDOOR COIL, INDOOR COIL, AND CONDENSATEDRAIN PAN......................................................................27OUTDOOR FAN...............................................................30ELECTRICAL CONTROLS AND WIRING ..................30REFRIGERANT CIRCUIT...............................................30INDOOR AIRFLOW ........................................................31METERING DEVICE — ACUTROL DEVICE .............31LIQUID LINE STRAINER ..............................................31Troubleshooting............................................................................34Start-Up Checklist ........................................................................36NOTE 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.Fig. 1—Unit 50HX with Optional Base RailsC95002Visit www.carrier.comManufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.Book 1 6Tab 6 8 PC 101 Catalog No. 535–00101 Printed in U.S.A. Form 50HX-5SI Pg 1 7–03 Replaces: 50HX-4SI