Carrier 40QNB018 Installation, Start-up And Service Instructions Manual

Also see for 38BK-018: Owner's manual

Contents

Installation, Start-Upand Service InstructionsCONTENTSPageSAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . 1GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,2INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9Step 1 − Complete Pre-Installation Checks . . . . 2• UNPACK UNIT• INSPECT SHIPMENTStep 2 − Select Location . . . . . . . . . . . . . . . . . . . . . 2Step 3 − Mount Mounting Bracket on Wall . . . . 4Step 4 − Connect Refrigerant Piping . . . . . . . . . 5Step 5 − Connect Condensate Drain Line . . . . . 7Step 6 − Make Electrical Connections . . . . . . . . 7Step 7 − Make Connections to Outdoor Unit . . 9• COOLING-ONLY SYSTEMS• HEAT PUMP SYSTEMSStep 8 − Install Fan Coil Unit Onto MountingBracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1240QN Control System . . . . . . . . . . . . . . . . . . . . . . . 10After Extended Shutdowns . . . . . . . . . . . . . . . . . . 10Seasonal Changeovers . . . . . . . . . . . . . . . . . . . . . . 10To Turn The Unit On and Off . . . . . . . . . . . . . . . . . 10Adjusting Airflow . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Operating Mode Memory . . . . . . . . . . . . . . . . . . . . 10Automatic Operation (Auto) Mode . . . . . . . . . . . . 11Operating Fault Diagnosis . . . . . . . . . . . . . . . . . . . 11Microprocessor Control Operation . . . . . . . . . . . 11CLEANING AND MAINTENANCE . . . . . . . . . . . . 12-14Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12To Install or Replace Remote ControllerBatteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12To Set the Current Time . . . . . . . . . . . . . . . . . . . . . 13To Remove and Clean or Replace Air Filters . . 13• TO REMOVE AIR FILTERS• TO CLEAN OR REPLACE FILTERSTo Clean Indoor Unit Front Panel . . . . . . . . . . . . 13To Clean Indoor Coil . . . . . . . . . . . . . . . . . . . . . . . . 13To Clean Outdoor Coil (Outdoor Unit) . . . . . . . . 14To Clean Condensate Drains . . . . . . . . . . . . . . . . . 14SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14,15Diagnostic Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . 14System Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14• THERMISTOR TESTS• COMPRESSOR FAILURE• REVERSING VALVE FAILURE (38BK Only)System Safeties and Interlocks . . . . . . . . . . . . . . 15• INDOOR FAN FAILURE• COMPRESSOR SHORT-CYCLING PROTECTION• INDOOR COIL FREEZE PROTECTION (Cooling orDehumidification Mode Only)• INDOOR COIL HIGH-TEMPERATUREPROTECTION (Heat Pump Systems Only)TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . 15-18START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . CL-1SAFETY CONSIDERATIONSInstalling and servicing air-conditioning equipment can behazardous due to system pressure and electrical compo-nents. Only trained and qualified service personnel shouldinstall or service air-conditioning equipment.Untrained personnel can perform basic maintenance, suchas cleaning and replacing filters. All other operations shouldbe performed by trained service personnel. When workingon air conditioning equipment, observe precautions in lit-erature and on tags and labels attached to unit.Follow all safety codes. Wear safety glasses and work gloves.Use quenching cloth for brazing operations. Have fire ex-tinguisher available. Read these instructions thoroughly. Con-sult local building codes and National Electrical Code (NEC)for special installation requirements.Before installing or servicing system, always turn offmain power to system. There may be more than one dis-connect switch. Turn off indoor fan coil power if ap-plicable. Electrical shock can cause personal injury.GENERALThe new Carrier 40QNE heat pump high wall fan coil units(Fig. 1) DO NOT have electric heaters. These new heat pumpfan coil units have been specifically designed to improve sys-tem efficiency in both heating and cooling modes when matchedwith a 38BK outdoor heat pump unit. If your applicationrequires heating, heat pump units must be used, both out-doors and indoors. See Table 1 for recommended systemcombinations.Fig. 1 — 40QN High Wall Fan Coil Unit40QNB/QNE018,024High Wall Fan Coil UnitsManufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.Book 1 4Tab 3e 2fPC 111 Catalog No. 534-078 Printed in U.S.A. Form 40QN-1SI Pg 1 4-96 Replaces: New