Carrier 40RFAA07 Installation, Start-up And Service Instructions Manual

Carrier 40RFAA07 Installation, Start-up And Service Instructions Manual Manual pdf 1 page image

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.Catalog No. 04-53400080-01 Printed in U.S.A. Form 40RF-7-12-02SI Rev. A Pg 1 2-23 Replaces: 40RU-7-16-01SIInstallation, Start-up andService InstructionsCONTENTSPageSAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1PRE-INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . 2Moving and Storage . . . . . . . . . . . . . . . . . . . . . . . . . . 2Rigging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Uncrating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Rated Indoor Airflow (cfm) . . . . . . . . . . . . . . . . . . . . . 9Unit Positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Unit Isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Refrigerant Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Refrigerant and Chilled Water Piping Access . . . . 10Chilled Water Piping . . . . . . . . . . . . . . . . . . . . . . . . . 12Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Fan Motors and Drives . . . . . . . . . . . . . . . . . . . . . . . . . . 13Power Supply and Wiring . . . . . . . . . . . . . . . . . . . . . . . 13• THREE STAGE OPERATIONConnecting Ductwork . . . . . . . . . . . . . . . . . . . . . . . . 18• DISCHARGE CONNECTION• RETURN CONNECTIONS• OUTDOOR-AIR INLET CONNECTIONSReturn-Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1940RFA and 40RFQ ONLY . . . . . . . . . . . . . . . . . . . . . 19Adjusting TXV for Superheat (40RFA and 40RFQ only) . . . . . . . . . . . . . . . . . . . 19SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19SUPPLY FAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Supply Fan (Direct-Drive) . . . . . . . . . . . . . . . . . . . . . 20• EVALUATING MOTOR SPEED• SELECTING FAN SPEED• FAN FAULT DETECTION• FREEZE PROTECTIONService Access for Supply Fan and Motor . . . . . . . 22• HORIZONTAL APPLICATIONS• VERTICAL APPLICATIONSCondensate Drains . . . . . . . . . . . . . . . . . . . . . . . . . . 26Return-Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Chilled Water Coil Freeze Protection . . . . . . . . . . . 26Coil Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Cleaning Cooling Coil . . . . . . . . . . . . . . . . . . . . . . . . 26Cleaning Insulation . . . . . . . . . . . . . . . . . . . . . . . . . . 26Replacing Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . .26MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27Quarterly Inspection (and 30 days after initial start) . . . . . . . . . . . . . . .27• INDOOR SECTIONSeasonal Maintenance . . . . . . . . . . . . . . . . . . . . . . .27• AIR CONDITIONINGFAN PERFORMANCE . . . . . . . . . . . . . . . . . . . . . . . .28START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . .CL-1SAFETY CONSIDERATIONSInstallation and servicing of air-conditioning equipment can behazardous due to system pressure and electrical components. Onlytrained and qualified service personnel should install, repair, orservice air-conditioning equipment.Untrained personnel can perform basic maintenance functions ofcleaning coils and filters and replacing filters. All other operationsshould be performed by trained service personnel. When workingon air-conditioning equipment, observe precautions in theliterature, tags and labels attached to the unit, and other safetyprecautions that may apply.Follow all safety codes, including ANSI (American NationalStandards Institute) Z223.1. Wear safety glasses and work gloves.Use quenching cloth for unbrazing operations. Have fireextinguisher available for all brazing operations.It is important to recognize safety information. This is the safety-alert symbol . When you see this symbol on the unit and ininstructions or manuals, be alert to the potential for personalinjury.Understand the signal words DANGER, WARNING, CAUTION,and NOTE. These words are used with the safety-alert symbol.DANGER identifies the most serious hazards which will result insevere personal injury or death. WARNING signifies hazardswhich could result in personal injury or death. CAUTION is usedto identify unsafe practices, which may result in minor personalinjury or product and property damage. NOTE is used to highlightsuggestions which will result in enhanced installation, reliability,or operation.DANGERELECTRICAL SHOCK HAZARDFailure to follow this warning will result in personal injury ordeath.Before performing service or maintenance operations on unit,turn off main power switch to unit and install lock(s) andlockout tag(s). Ensure electrical service to rooftop unit agreeswith voltage and amperage listed on the unit rating plate. Unitmay have more than one power switch.40RF/A/S/Q 07-12Packaged Air-Handling Unitswith Puron® (R-410A) Refrigerant60 Hz