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Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53480077-01 Printed in U.S.A. Form 48/50A-9T Pg CL-6 6-10 Replaces: 48/50A-7T
Copyright 2010 Carrier Corporation
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CUT ALONG DOTTED LINE CUT ALONG DOTTED LINE
UNIT START-UP CHECKLIST
MODEL NO.: _________________________________ SERIAL NO.: ______________________________________
SOFTWARE VERSION _________________________ TECHNICIAN: ____________________________________
DATE: _______________________________________
PRE-START-UP:
VERIFY THAT DIP SWITCH SETTINGS ARE CORRECT
VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNIT
REMOVE ALL COMPRESSOR SHIPPING HOLDDOWN BOLTS AND BRACKETS PER INSTRUCTIONS
VERIFY INSTALLATION OF ECONOMIZER HOOD
VERIFY INSTALLATION OF ALL OPTIONS AND ACCESSORIES
VERIFY THAT ALL ELECTRICAL CONNECTIONS AND TERMINALS ARE TIGHT
CHECK GAS PIPING FOR LEAKS (48A ONLY)
CHECK THAT RETURN-AIR FILTER AND OUTDOOR-AIR FILTERS ARE CLEAN AND IN PLACE
VERIFY THAT UNIT IS LEVEL WITHIN TOLERANCES FOR PROPER CONDENSATE DRAINAGE
CHECK FAN WHEELS AND PROPELLERS FOR LOCATION IN HOUSING/ORIFICE, AND SETSCREW IS TIGHT
VERIFY THAT FAN SHEAVES ARE ALIGNED AND BELTS ARE PROPERLY TENSIONED
VERIFY THAT SUCTION, DISCHARGE, AND LIQUID SERVICE VALVES ON EACH CIRCUIT ARE OPEN
VERIFY THAT CRANKCASE HEATERS HAVE BEEN ON 24 HOURS BEFORE START-UP
START-UP:
ELECTRICAL
SUPPLY VOLTAGE L1-L2 __________ L2-L3 __________ L3-L1 __________
COMPRESSOR AMPS — COMPRESSOR NO. 1 L1 __________ L2 __________ L3 _________
COMPRESSOR AMPS — COMPRESSOR NO. 2 L1 __________ L2 __________ L3 _________
SUPPLY FANS AMPS (CV) ________ EXHAUST FAN AMPS __________
(VAV) ________ *
*VAV fan supply amps reading must be taken with a true RMS meter for accurate readings.
TEMPERATURES
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 (48A ONLY)
ELECTRIC HEAT SUPPLY AIR __________ F (50A ONLY, IF EQUIPPED)
PRESSURES
GAS INLET PRESSURE __________ IN. WG (48A ONLY)
GAS MANIFOLD PRESSURE STAGE NO. 1 __________ IN. WG STAGE NO. 2 __________IN. WG (48A ONLY)
REFRIGERANT SUCTION CIRCUIT NO. 1 __________ PSIG CIRCUIT NO. 2__________ PSIG
REFRIGERANT DISCHARGE CIRCUIT NO. 2 __________ PSIG CIRCUIT NO. 2__________ PSIG
VERIFY REFRIGERANT CHARGE.