Carrier 48PG20-28 User Manual
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC 111
Catalog No. 534-80211
Printed in U.S.A.
Form 48PG-10SI
Pg CL-1
9-05
Replaces: New
Book
1
4
Tab
1a 6a
Copyright 2005 Carrier Corporation
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UNIT START-UP CHECKLIST
MODEL NO.:___________________________________________
SERIAL NO.:______________________________________________
DATE:_________________________________________________
TECHNICIAN: ____________________________________________
I. PRE-START-UP:
VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNIT
VERIFY INSTALLATION OF OUTDOOR AIR HOOD
VERIFY INSTALLATION OF FLUE EXHAUST AND INLET HOOD
VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTRUCTIONS
VERIFY THAT ALL ELECTRICAL CONNECTIONS AND TERMINALS ARE TIGHT
VERIFY GAS PRESSURE TO UNIT GAS VALVE IS WITHIN SPECIFIED RANGE
CHECK GAS PIPING FOR LEAKS
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 WHEEL AND PROPELLER FOR LOCATION IN HOUSING/ORIFICE, AND VERIFY SETSCREW
VERIFY INSTALLATION OF OUTDOOR AIR HOOD
VERIFY INSTALLATION OF FLUE EXHAUST AND INLET HOOD
VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTRUCTIONS
VERIFY THAT ALL ELECTRICAL CONNECTIONS AND TERMINALS ARE TIGHT
VERIFY GAS PRESSURE TO UNIT GAS VALVE IS WITHIN SPECIFIED RANGE
CHECK GAS PIPING FOR LEAKS
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 WHEEL 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 THERMOSTAT
VERIFY THAT CRANKCASE HEATERS HAVE BEEN ENERGIZED FOR AT LEAST 24 HOURS
VERIFY THAT SCROLL COMPRESSORS ARE ROTATING IN THE CORRECT DIRECTION
VERIFY INSTALLATION OF THERMOSTAT
VERIFY THAT CRANKCASE HEATERS HAVE BEEN ENERGIZED FOR AT LEAST 24 HOURS
II. START-UP
ELECTRICAL
TEMPERATURES
PRESSURES
VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS ON PAGE 50
GENERAL
ECONOMIZER MINIMUM VENT AND CHANGEOVER SETTINGS TO JOB REQUIREMENTS
SUPPLY VOLTAGE
L1-L2
L2-L3
L3-L1
COMPRESSOR AMPS — COMPRESSOR A1
L1
L2
L3
— COMPRESSOR A2
L1
L2
L3
— COMPRESSOR B1
L1
L2
L3
SUPPLY FAN AMPS
L1
L2
L3
OUTDOOR-AIR TEMPERATURE
F DB (Dry Bulb)
RETURN-AIR TEMPERATURE
F DB
F WB (Wet Bulb)
COOLING SUPPLY AIR
F
GAS HEAT SUPPLY AIR
F
GAS INLET PRESSURE
IN. WG
GAS MANIFOLD PRESSURE STAGE NO. 1
IN. WG
STAGE NO. 2
IN. WG
REFRIGERANT SUCTION
CIRCUIT A
PSIG
CIRCUIT B
PSIG
REFRIGERANT DISCHARGE CIRCUIT A
PSIG
CIRCUIT B
PSIG