Carrier WeatherExpert 48N2 User Manual

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53480114-01 Printed in U.S.A. Form 48/50N-2T Pg CL-8 7-14 Replaces: 48/50N-1T
© Carrier Corporation 2014
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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 (48N 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 __________ L2 _________
COMPRESSOR AMPS — COMPRESSOR NO. 2 L1 __________ L2 __________ L2 _________
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 (48N ONLY)
ELECTRIC HEAT SUPPLY AIR __________ F (50N ONLY, IF EQUIPPED)
PRESSURES
GAS INLET PRESSURE __________ IN. WG (48N ONLY)
GAS MANIFOLD PRESSURE STAGE NO. 1 __________ IN. WG STAGE NO. 2 __________IN. WG (48N ONLY)
REFRIGERANT SUCTION CIRCUIT NO. 1 __________ PSIG CIRCUIT NO. 2__________ PSIG
REFRIGERANT DISCHARGE CIRCUIT NO. 2 __________ PSIG CIRCUIT NO. 2 __________ PSIG
 ______________________ VERIFY REFRIGERANT CHARGE.

Carrier WeatherExpert 48N2 Specifications

General

Product Type	Air Conditioner
Series	WeatherExpert
Model Number	48N2
Refrigerant Type	R-410A
Compressor Type	Scroll
Phase	1
Seasonal Energy Efficiency Ratio (SEER)	16
Voltage	208/230V