Carrier WeatherMaster 50HC14 Installation Instructions Manual

Also see for WeatherMaster 50HC14: Service and maintenance instructions Service and maintenance instructions Installation instructions

Contents

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.Catalog No. 04-53500209-01 Printed in U.S.A. Form 50HC-14-03SI Pg 1 8-18 Replaces: 50HC-14-02SIInstallation InstructionsCONTENTSPageSAFETY CONSIDERATIONS. . . . . . . . . . . . . . . . . . . . . . 1Rated Indoor Airflow (cfm) . . . . . . . . . . . . . . . . . . . . . . ..2INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Step 1 — Plan for Unit Location . . . . . . . . . . . . . . . . . . 6Step 2 — Plan for Sequence of Unit Installation . 7Step 3 — Inspect Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Step 4 — Provide Unit Support . . . . . . . . . . . . . . . . . . . 7Step 5 — Field Fabricate Ductwork. . . . . . . . . . . . . . . 9Step 6 — Rig and Place Unit . . . . . . . . . . . . . . . . . . . . . 9Step 7 — Convert to Horizontal and ConnectDuctwork . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Step 8 — Install Outside Air Hood . . . . . . . . . . . . . . . 11Step 9 — Install External Condensate Trap andLine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Step 10 — Make Electrical Connections . . . . . . . . . 14Electric Heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Single Point Boxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Humidi-MiZer ® System Control Connections . . . . 22EconoMi$er ® X (Factory-Installed Option) . . . . . . . 25Low Ambient Control (Factory Option) . . . . . . . . . 38Staged Air Volume (SAV) with Variable FrequencyDrive (Factory Option) . . . . . . . . . . . . . . . . . . . . . . . 38ComfortLink Controls (Factory Option) . . . . . . . . . 38PremierLink Controller (Factory Option) . . . . . . . . 43Supply Air Temperature Sensor . . . . . . . . . . . . . . . . . 46Field Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46Economizer Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . 49RTU Open Control System . . . . . . . . . . . . . . . . . . . . . . 52Field Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56Communication Wiring — Protocols . . . . . . . . . . . . 58Local Access. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59Outdoor Air Enthalpy Control . . . . . . . . . . . . . . . . . . . 60Smoke Detectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60Step 11 — Adjust Factory-Installed Options . . . . . 62Step 12 — Install Accessories. . . . . . . . . . . . . . . . . . . 62Step 13 — Check Belt Tension . . . . . . . . . . . . . . . . . . 62Pre-Start and Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . 63START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . CL-1SAFETY CONSIDERATIONSImproper installation, adjustment, alteration, service,maintenance, or use can cause explosion, fire, electricalshock or other conditions which may cause personal injuryor property damage. Consult a qualified installer, serviceagency, or your distributor or branch for information or as-sistance. The qualified installer or agency must use factory-authorized kits or accessories when modifying this product.Refer to the individual instructions packaged with the kitsor accessories when installing.Follow all safety codes. Wear safety glasses and workgloves. Use quenching cloths for brazing operations andhave a fire extinguisher available. Read these instructionsthoroughly and follow all warnings or cautions attached tothe unit. Consult local building codes and appropriate na-tional electrical codes (in USA, ANSI/NFPA70, NationalElectrical Code (NEC); in Canada, CSA C22.1) for specialrequirements.It is important to recognize safety information. This isthe safety-alert symbol . When you see this symbol onthe unit and in instructions or manuals, be alert to the poten-tial for personal injury.Understand the signal words DANGER, WARNING,CAUTION, and NOTE. These words are used with the safe-ty-alert symbol. DANGER identifies the most serious haz-ards which will result in severe personal injury or death.WARNING signifies hazards which could result in personalinjury or death. CAUTION is used to identify unsafe prac-tices, which may result in minor personal injury or productand property damage. NOTE is used to highlight sugges-tions which will result in enhanced installation, reliability,or operation.50HC units for installation in the United States contain use of Carrier's Staged Air Volume (SAV™) 2-speedindoor fan control system. This complies with the U.S. Department of Energy (DOE) efficiency standard of2018.50HC units for installation outside the United States may or may not contain use of the SAV 2-speed indoorfan control system as they are not required to comply with the U.S. Department of Energy (DOE) efficiencystandard of 2018.For specific details on operation of the Carrier SAV 2-speed indoor fan system refer to the VariableFrequency Drive (VFD) Factory-Installed Option 2-Speed Motor Control Installation, Setup, andTroubleshooting manual.WARNINGELECTRICAL SHOCK HAZARDFailure to follow this warning could cause personal injury ordeath.Before performing service or maintenance operations onunit, turn off main power switch to unit and install lock(s)and lockout tag(s). Ensure electrical service to rooftop unitagrees with voltage and amperage listed on the unit ratingplate. Unit may have more than one power switch.WeatherMaster ®50HC14Single Package Rooftop Cooling Only Unitwith Puron ® (R-410A) Refrigerant