Unit Start-Up Checklist - Carrier 48/50PD05 User Manual

Single package displacement ventilation or single zone variable airflow rooftop units electric cooling/gas heating with puron(r--410a)refrigerant and comfortlink 1.x controls

Table of Contents

MODEL NO.:

DATE:

I. PRE-START-UP:

VERIFY THAT ALL PACKAGING MATERIALS HAVE BEEN REMOVED FROM UNIT

VERIFY INSTALLATION OF OUTDOOR AIR HOOD

VERIFY INSTALLATION OF FLUE EXHAUST AND INLET HOOD (48PD ONLY)

VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTALLATION INSTRUCTIONS

VERIFY THAT ALL ELECTRICAL CONNECTIONS AND TERMINALS ARE TIGHT

VERIFY GAS PRESSURE TO UNIT GAS VALVE IS WITHIN SPECIFIED RANGE (48PD ONLY)

CHECK GAS PIPING FOR LEAKS (48PD ONLY)

CHECK THAT INDOOR- -AIR FILTERS ARE CLEAN AND IN PLACE

CHECK THAT OUTDOOR AIR INLET SCREENS ARE IN PLACE

VERIFY THAT UNIT IS LEVEL

CHECK FAN WHEELS AND PROPELLER FOR LOCATION IN HOUSING/ORIFICE AND VERIFY SETSCREW IS TIGHT

VERIFY THAT FAN SHEAVES ARE ALIGNED AND BELTS ARE PROPERLY TENSIONED

VERIFY THAT SCROLL COMPRESSORS ARE ROTATING IN THE CORRECT DIRECTION

VERIFY INSTALLATION OF SPACE SENSOR

VERIFY CONFIGURATION VALUES FOR ELECTRONIC CONTROLS (REFER TO CONTROL SET UP CHECKLIST)

VERIFY THAT CRANKCASE HEATERS HAVE BEEN ENERGIZED FOR AT LEAST 24 HOURS

VERIFY THAT THE VFD IS IN AUTO MODE

II. START-UP

ELECTRICAL

SUPPLY VOLTAGE

COMPRESSOR AMPS—COMPRESSOR A1

—COMPRESSOR B1

—COMPRESSOR C1

ELECTRIC HEAT AMPS (IF EQUIPPED)

SUPPLY FAN AMPS

TEMPERATURES

OUTDOOR-AIR TEMPERATURE

RETURN-AIR TEMPERATURE

COOLING SUPPLY AIR

GAS HEAT SUPPLY AIR (48PG)

ELECTRIC HEAT SUPPLY AIR (50PG)

PRESSURES

GAS INLET PRESSURE

GAS MANIFOLD PRESSURE

REFRIGERANT SUCTION

REFRIGERANT DISCHARGE

VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS

GENERAL

ECONOMIZER MINIMUM VENT AND CHANGEOVER SETTINGS TO JOB REQUIREMENTS