Carrier 48NLU-B Installation Instructions Manual

Carrier 48NLU-B Installation Instructions Manual Manual pdf 1 page image

48NLU-B Ultra Low NOx: Installation InstructionsManufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.1Installation InstructionsIMPORTANT: Effective January 1, 2015, all split system and packagedair conditioners must be installed pursuant to applicable regionalefficiency standards issued by the Department of Energy.NOTE: Read the entire instruction manual before starting theinstallation.NOTE: Installer: Make sure the Owner’s Manual and ServiceInstructions are left with the unit after installation.Table of ContentsSafety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Receiving and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Pre-start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36Start-up Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37A09033Fig. 1 – Unit 48NLSafety ConsiderationsThis unit is equipped with electrically powered safety measures. For thesafety measures to be effective, the unit must be electrically powered atall times after installation, other than when servicing.Improper installation, adjustment, alteration, service maintenance, or usecan cause explosion, fire, electrical shock, or other conditions whichmay cause death, personal injury, or property damage. Consult aqualified installer, service agency, or your distributor or branch forinformation or assistance. The qualified installer or agency must usefactory-authorized kits or accessories when modifying this product.Auxiliary devices which may be a POTENTIAL IGNITION SOURCEshall not be installed in the duct work. Examples of such POTENTIALIGNITION SOURCES are hot surfaces with a temperature exceeding1292°F (700°C) and electric switching devices.Electrostatic air purifiers installed in the ductwork are permitted, if thepurifier has an airflow sensor.False ceilings or drop ceilings must not be used as a return airduct/plenum.Refer to the individual instructions packaged with the kits or accessorieswhen installing.This self-contained unit is already charged with refrigerant for optimumperformance, and shouldn't require any adjustments. Should anyinstallation/service work on the A2L refrigerant system be needed,non-sparking tools are required. If the refrigerant system is opened, arefrigerant detector should be used to check for leaks. Open flames orother ignition sources should not be present, except during brazing.Brazing should only take place on refrigerant tubes that are open to theatmosphere or have been properly evacuated.Follow all safety codes. Wear safety glasses, protective clothing, andwork gloves. Have a fire extinguisher available. Read these instructions48NLU-B Ultra Low NOxComfort 13.4 SEER2 Single-Packaged AirConditioner and Gas Furnace System with PuronAdvance™ (R-454B) RefrigerantSingle Phase 2-5 Nominal Tons (Sizes 24-60)Three Phase 3-5 Nominal Tons (Sizes 36-60)WARNING!PERSONAL INJURY AND PROPERTY DAMAGEHAZARDContinuous fan mode required for proper functioning. Installation mustmeet the Required Minimum Dissipation Airflow as outlined in theLeak Dissipation System section. Follow instructions in the ContinuousFan Speed Set-Up section to change speeds.WARNING!PERSONAL INJURY AND PROPERTY DAMAGEHAZARDFor continued performance, reliability, and safety, the only approvedaccessories and replacement parts are those specified by the equipmentmanufacturer. The use of non-manufacturer approved parts andaccessories could invalidate the equipment limited warranty and resultin fire risk, equipment malfunction, and failure. Please reviewmanufacturer's instructions and replacement part catalogs availablefrom your equipment supplier.