Carrier 50JZ024 Installation, Start-up And Service Instructions Manual

Also see for 50JZ024: Installation and operating instructions Guide to operating and maintaining Guide to operating and maintaining Product data Product data

Contents

50JZ024-060Single-Package Heat Pump Unitswith Puron® (R-410A) RefrigerantInstallation, Start-Up and Service InstructionsNOTE: Read the entire instruction manual before starting theinstallation.IndexSAFETY CONSIDERATIONS ...............................................1-2INTRODUCTION .................................................................2RECEIVING AND INSTALLATION..................................2-15Check Equipment.........................................................................2Identify Unit..............................................................................2Inspect Shipment.......................................................................2Provide Unit Support...................................................................2Roof Curb..................................................................................2Slab Mount................................................................................2Ground Mount...........................................................................2Provide Clearances.......................................................................2Rig and Place Unit .......................................................................2Select and Install Ductwork ....................................................2-7Converting Horizontal Discharge Units to Downflow (Vertical)Discharge ...............................................................................6-7Provide for Condensate Disposal ............................................7-8Install Electrical Connections................................................8-14High-Voltage Connections........................................................8Routing Power Leads Into Unit ...............................................8Routing Control Power Wires ..................................................8Connecting Ground Lead to Ground Lug................................8Special Procedures for 208v Operation .................................14PRE-START-UP.........................................................................14START-UP.............................................................................14-19Check for Refrigerant Leaks ....................................................14Start-Up Adjustment ............................................................14-16Defrost Control......................................................................16-19MAINTENANCE ..................................................................20-21REFRIGERANT SYSTEM..................................................21-22SYSTEM INFORMATION .................................................22-23Time Delay Relay...................................................................22Loss of Charge Switch ...........................................................22Check Defrost Thermostat......................................................22Defrost Thermostat .................................................................22Puron® Quick Reference Guide ............................................23TROUBLESHOOTING CHART........................................24-25START-UP CHECKLIST .........................................................25NOTE TO INSTALLER — READ THESE INSTRUCTIONSCAREFULLY AND COMPLETELY before installing this unit.Also, make sure the Owner’s Manual and Service Instructions areleft with the 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 service airconditioning 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.Improper installation, adjustment, alteration, service, mainte-nance, or use can cause explosion, fire, electric shock, orother occurrences, which could cause serious injury or deathor damage your property. Consult a qualified installer orservice agency for information or assistance. The qualifiedinstaller or agency must use only factory-authorized kits oraccessories when modifying this product.Recognize safety information. This is the safety-alert symbol .When you see this symbol on the product or in instructions ormanuals, be alert to the potential for personal injury.Understand the signal words — DANGER, WARNING, CAU-TION, and NOTE. Danger identifies the most serious hazards,which will result in severe personal injury or death. Warningindicates a condition that could cause serious personal injury ordeath. Caution is used to identify unsafe practices, which wouldresult in minor personal injury or product and property damage.NOTE is used to highlight suggestions which will result inenhanced installation, reliability or operation.1. The power supply (volts, phase, and hertz) must correspond tothat specified on unit rating plate.2. The electrical supply provided by the utility must be sufficientto handle load imposed by this unit.3. This installation must conform with local building codes andwith NEC (National Electrical Code). Refer to provincial andlocal plumbing or waste water codes and other applicable localcodes.Fig. 1—Unit 50JZC99064Visit 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 5a 5a PC 101 Catalog No. 565-061 Printed in U.S.A. Form 50JZ-1SI Pg 1 8-00 Replaces: New