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

Also see for 50JS: User manual Operating and maintaining guide Guide to operating and maintaining

Contents

50JS,JX018-060Single-Package Heat Pump UnitsInstallation, Start-Up and Service InstructionsNOTE: Read the entire instruction manual before starting theinstallation.IndexSAFETY CONSIDERATIONS ...............................................1-4General .................................................................................4RECEIVING AND INSTALLATION..................................4-15Check Equipment......................................................................4-5Identify Unit..............................................................................4Inspect Shipment.......................................................................5Provide Unit Support...................................................................5Roof Curb..................................................................................5Slab Mount................................................................................5Ground Mount...........................................................................5Provide Clearances.......................................................................5Rig and Place Unit....................................................................5-6Select and Install Ductwork ....................................................6-8Converting Horizontal Discharge Units to Downflow (Vertical)Discharge...................................................................................6Provide for Condensate Disposal ............................................6-8Install Electrical Connections .....................................................8High-Voltage Connections........................................................8Routing Power Leads Into Unit ..........................................8-14Connecting Ground Lead to Ground Lug..............................14Special Procedures for 208-V Operation ...............................15PRE-START-UP.........................................................................15START-UP.............................................................................15-20Check for Refrigerant Leaks ..................................................15Unit Start-Up Adjustment .................................................15-20MAINTENANCE ..................................................................20-23SYSTEM INFORMATION.......................................................23Time Delay Relay...................................................................23Pressure Switches....................................................................23Defrost Thermostat .................................................................23TROUBLESHOOTING .......................................................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 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.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—Model 50JS/JXC99001Visit 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. 565-057 Printed in U.S.A. Form 50JS,JX-1SI Pg 1 5-00 Replaces: 50JX-2SI