Carrier WeatherMaster 48HC14 Installation Instructions Manual

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.Catalog No. 04-53480222-01 Printed in U.S.A. Form 48HC-14-04SI Pg 1 2-19 Replaces: 48HC-14-03SIInstallation InstructionsCONTENTSSAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . 1GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Rated Indoor Airflow (cfm) . . . . . . . . . . . . . . . . . . . . . 3INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Step 1 — Plan for Unit Location . . . . . . . . . . . . . . . . . 7• ROOF MOUNTStep 2 — Plan for Sequence of Unit Installation . . . . 7• CURB-MOUNTED INSTALLATION• PAD-MOUNTED INSTALLATION• FRAME-MOUNTED INSTALLATIONStep 3 — Inspect Unit . . . . . . . . . . . . . . . . . . . . . . . . . 8Step 4 — Provide Unit Support. . . . . . . . . . . . . . . . . . 8• ROOF CURB MOUNT• SLAB MOUNT (HORIZONTAL UNITS ONLY)• ALTERNATE UNIT SUPPORT (IN LIEU OF CURB ORSLAB MOUNT)Step 5 — Field Fabricate Ductwork . . . . . . . . . . . . . 10Step 6 — Rig and Place Unit . . . . . . . . . . . . . . . . . . . 10• POSITIONING ON CURBStep 7 — Convert to Horizontal and ConnectDuctwork (When Required). . . . . . . . . . . . . . . . . . 11Step 8 — Install Outside Air Hood . . . . . . . . . . . . . . 12• ECONOMIZER HOOD REMOVAL AND SETUP —FACTORY OPTION• TWO POSITION DAMPER HOOD REMOVAL ANDSETUP — FACTORY OPTION• ECONOMIZER HOOD AND TWO-POSITION HOODStep 9 — Install Flue Hood . . . . . . . . . . . . . . . . . . . . 14Step 10 — Install Gas Piping. . . . . . . . . . . . . . . . . . . 14• FACTORY OPTION THRU-BASE CONNECTIONS(GAS CONNECTION)Step 11 — Install External Condensate Trap andLine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Step 12 — Make Electrical Connections . . . . . . . . . 18• FIELD POWER SUPPLY• ALL UNITS• UNITS WITHOUT FACTORY-INSTALLED NON-FUSED DISCONNECT OR HACR CIRCUIT BREAKER• UNITS WITH FACTORY-INSTALLED NON-FUSEDDISCONNECT OR HACR CIRCUIT BREAKER• CONVENIENCE OUTLETS• HACR CIRCUIT BREAKER• FACTORY OPTION THRU-BASE CONNECTIONS(ELECTRICAL CONNECTIONS)• UNITS WITHOUT THRU-BASE CONNECTIONS• FIELD CONTROL WIRING• THERMOSTAT• UNIT WITHOUT THRU-BASE CONNECTION KIT• HEAT ANTICIPATOR SETTINGSWiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24Humidi-MiZer® System Control Connections . . . . .28• HUMIDI-MIZER — SPACE RH CONTROLLEREconoMi$er® X (Factory Option) . . . . . . . . . . . . . . .30• SYSTEM COMPONENTS• SPECIFICATIONS• INPUTS• OUTPUTS• ENVIRONMENTAL• ECONOMIZER MODULE WIRING DETAILS• INTERFACE OVERVIEW• SETUP AND CONFIGURATION• ENTHALPY SETTINGS• TWO-SPEED FAN OPERATION• CHECKOUT• TROUBLESHOOTINGLow Ambient Control (Factory Option). . . . . . . . . . .43Staged Air Volume (SAV™) with Variable FrequencyDrive (Factory Option) . . . . . . . . . . . . . . . . . . . . . .43ComfortLink Controls (Factory Option) . . . . . . . . . .43PremierLink™ Controller (Factory Option) . . . . . . .47RTU Open Controller System (Factory-InstalledOption). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47Smoke Detectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . .47• ADDITIONAL APPLICATION DATAStep 13 — Adjust Factory-Installed Options . . . . . .48• SMOKE DETECTORS• ECONOMI$ER IV OCCUPANCY SWITCHStep 14 — Install Accessories . . . . . . . . . . . . . . . . . .48Step 15 — Check Belt Tension . . . . . . . . . . . . . . . . .48• BELT FORCE — DEFLECTION METHOD• BELT TENSION METHODPre-Start and Start-Up . . . . . . . . . . . . . . . . . . . . . . . .49START-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 or48HC 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 indoor fancontrol 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 Variable FrequencyDrive (VFD) Factory-Installed Option 2-Speed Motor Control Installation, Setup, and Troubleshooting manual.WeatherMaster®48HC14Single Package Rooftop Gas Heat/Electric CoolingUnit with Puron ® (R-410A) Refrigerant