Carrier T--298 Specific Warning and Caution Statements, Specific Warnings and Cautions

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SPECIFIC WARNING AND CAUTION STATEMENTS

The statements listed below are applicable to the refrigeration unit and appear elsewhere in this manual. These recommended precautions must be understood and applied during operation and maintenance of the equipment covered herein.

SPECIFIC WARNINGS AND CAUTIONS

WARNING

Be sure to observe warnings listed in the safety summary in the front of this manual before performing maintenance on the AirV system

WARNING

Before working on the unit be sure to first disconnect all electric power to the unit to avoid the possibility of electrical shock and personal injury. Before disconnecting, discharge capaci- tors by shorting across the capacitors terminals (Refer to paragraph 3.5.8)

WARNING

Shield coils with cardboard to protect hands against injury from sharp metal edges when re- moving compressor and other components.

WARNING

Oil vapor in piping stubs can ignite from torch flame and cause serious injury. Exercise ex- treme care when brazing, and keep brazing cloth and fire extinguisher handy for emergency use.

WARNING

Disconnect power to the AirV unit before checking the capacitor.

WARNING

Do not touch the metal of the screwdriver when discharging the capacitor. You could receive a shock.

WARNING

Before installing thermostat, turn off all power to unit. There may be more than one power disconnect. Electrical shock can cause personal injury or death.

CAUTION

Do not use carbon tetrachloride, solvents, or waxes containing solvents to clean plastic sec- tions.

T--298

Safety-- ii

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Contents Model AirV AirV Safety Summary General Safety NoticesOperating Precautions Maintenance PrecautionsSpecific Warning and Caution Statements Specific Warnings and CautionsSafety 298 Table of Contents Table of Contents List of Figures Figure NumberList of Tables Table NumberSection Description IntroductionSerial Number Identification Design Change DescriptionsUpper Unit Roof Ceiling UnitMANUAL--FORM no Equipment Covered Type of Manual Additional Support ManualsFor Part no Ceiling Unit Component Identification Free--Blow Component Identification -- Low Profile -- Upper Unit Component Listing--Ceiling Unit For Ducted Systems Supply AIR Return AIRFree Blow Type START--UP CationsRefrigerant CYCLE--STANDARD System Refrigerant Flow Schematic -- Heat Pump -- Cool Mode Cooling Refrigerant Cycle -- Heat PumpPage Section Troubleshooting Heater Cycles on Limit Switch HEAT/ Cool Version only Insufficient COOLING, Cooling AIR not AdequateCondenser AIR not Adequate Insufficient CoolingClearing Diagnostic Alarms Inadequate Heat HEAT--PUMPPriority Malfunction Preventative Maintenance Section Service and MaintenanceService -- General Ceiling Grill -- Free Blow 3.3.3 Ceiling Panel Removal Indoor Thermostat Removal Indoor Thermostat 3.3.7 Air Sweep RemovalCeiling Unit -- Ducted Systems Control Box Assembly RemovalFilter Removal PCB Display Removal Service -- Upper Unit -- STANDARD, HC & HPFuse Removal Compressor Replacement 15 Control BoxUpper Scroll Assembly Removal 19 Motor AssemblyAir Handling System Removal 23 Blower WheelLine Voltage -- 10% 27 Upper Scroll Assembly Locking Tabs b. & Screw Locations c 30 Condenser Fan Assembly Retaining Ring Condenser Motor Removal 34 Evaporator Motor Locking TabsCapacitor Removal Change from Fahrenheit to Celsius willBe permanent. It cannot be changed back to Fahrenheit38 Remote Control Components SET Thermostat Configuration LCD DisplayCheck Thermostat Operation Upper Unit Powerbox AssemblyThermostat Thermostat Powerbox Assembly Ac to ry Wiri ng Fie ld Wiri ngSection Wiring Schematics Upper Unit Schematic -- Standard & HCCeiling Unit Schematic -- Cooling Only Heat Pump -- Ceiling Unit -- Free Blow Heat Pump -- Upper Unit -- Ducted 10 Ceiling Unit -- Wall Thermostat -- Ducted & Free Blow Wall Mounted ThermostatsIndex Ceiling Unit -- Ducted Systems Ceiling Unit -- Free Blow