Carrier WeatherMaster 48HC07 Series Installation Instructions Manual

Also see for WeatherMaster 48HC07 Series: Service and maintenance instructions

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.Catalog No. 04-53480221-01 Printed in U.S.A. Form 48HC-7-12-06SI Pg 1 1-19 Replaces: 48HC-7-12-05SIInstallation InstructionsCONTENTSPageSAFETY CONSIDERATIONS. . . . . . . . . . . . . . . . . . . . . . 1MODEL NUMBER NOMENCLATURE ANDDIMENSIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Rated Indoor Airflow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Pre-Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Step 1 — Plan for Unit Location . . . . . . . . . . . . . . . . . 10• ROOF MOUNTStep 2 — Plan for Sequence of UnitInstallation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11• CURB-MOUNTED INSTALLATION• PAD-MOUNTED INSTALLATION• FRAME-MOUNTED INSTALLATIONStep 3 — Inspect Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Step 4 — Provide Unit Support . . . . . . . . . . . . . . . . . . 11• ROOF CURB MOUNT• SLAB MOUNT (HORIZONTAL UNITS ONLY)• ALTERNATE UNIT SUPPORTStep 5 — Field Fabricate Ductwork. . . . . . . . . . . . . . 13Step 6 — Rig and Place Unit . . . . . . . . . . . . . . . . . . . . 13• POSITIONING ON CURBStep 7 — Convert to Horizontal andConnect Ductwork (when required) . . . . . . . . . . 15Step 8 — Install Outside Air Hood. . . . . . . . . . . . . . 15• ECONOMIZER AND TWO-POSITION DAMPERHOOD PACKAGE REMOVAL AND SETUP• ECONOMIZER HOOD AND TWO-POSITION HOODASSEMBLYStep 9 — Install Flue Hood . . . . . . . . . . . . . . . . . . . . . . 17Step 10 — Install Gas Piping . . . . . . . . . . . . . . . . . . . 17• FACTORY OPTION THRU-BASE CONNECTIONS(GAS CONNECTIONS)Step 11 — Install External Condensate Trapand Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Step 12 — Make Electrical Connections . . . . . . . . . 20• FIELD POWER SUPPLY• UNITS WITH FACTORY-INSTALLED NON-FUSEDDISCONNECT OR HACR• UNITS WITHOUT FACTORY-INSTALLED NON-FUSED DISCONNECT OR HACR CIRCUITBREAKER• ALL UNITS• CONVENIENCE OUTLETS• HACR CIRCUIT BREAKERPage• FACTORY-OPTION THRU-BASED CONNECTIONS(ELECTRICAL CONNECTIONS)• UNITS WITHOUT THRU-BASE CONNECTIONS• FIELD CONTROL WIRING• THERMOSTAT• HUMIDI-MIZER ® SYSTEM CONTROLCONNECTIONS• TYPICAL CONTROL WIRING DIAGRAMS• ECONOMI$ER ® X (FACTORY OPTION)Smoke Detectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49• COMPLETING INSTALLATION OF RETURN AIRSMOKE SENSOR• ADDITIONAL APPLICATION DATAStaged Air Volume (SAV™) with VariableFrequency Drive (Factory Option) . . . . . . . . . . . . 50ComfortLink Control (Factory Option) . . . . . . . . . . 50PremierLink™ Controller (Factory Option) . . . . . . 50RTU Open Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . 50Controller Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50• LOW AMBIENT CONTROL (FACTORY OPTION)Step 13 — Adjust Factory-Installed Options . . . . . 51• SMOKE DETECTORS• ECONOMI$ER ® IV OCCUPANCY SWITCHStep 14 — Install Accessories. . . . . . . . . . . . . . . . . . . 51Step 15 — Check Belt Tension . . . . . . . . . . . . . . . . . . 51Pre-Start and Start-Up . . . . . . . . . . . . . . . . . . . . . . . . 52START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . CL-1SAFETY CONSIDERATIONSImproper installation, adjustment, alteration, service,maintenance, or use can cause explosion, fire, electrical shockor other conditions which may cause personal injury orproperty damage. Consult a qualified installer, service agency,or your distributor or branch for information or assistance. Thequalified installer or agency must use factory-authorized kits oraccessories when modifying this product. Refer to theindividual instructions packaged with the kits or accessorieswhen installing.Follow all safety codes. Wear safety glasses and work gloves.Use quenching cloths for brazing operations and have a fireextinguisher available. Read these instructions thoroughly andfollow all warnings or cautions attached to the unit. Consultlocal building codes and appropriate national electrical codes(in USA, ANSI/NFPA70, National Electrical Code (NEC); inCanada, CSA C22.1) for special requirements.48HC 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 of2018.48HC 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.WeatherMaster®48HC07-12Single Package Rooftop Gas Heat/Electric Cooling Unitwith Puron® (R-410A) Refrigerant