Carrier 48/50AJ specifications Unit START-UP Checklist, Pre-Start-Up

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.

Copyright 2010 Carrier Corporation

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

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