Form 48/50A-14T Pg - Carrier WeatherMaker 48A2020 Controls, Start-Up, Operation, Service And Troubleshooting Instructions

NOTE: To avoid injury to personnel and damage to equipment or
property when completing the procedures listed in this start-up
checklist, use good judgment, follow safe practices, and adhere
to the safety considerations/information as outlined in preced-
ing sections of this Controls, Start-Up, Operation, Service, and
Troubleshooting document.
MODEL NO.: _________________________________
SOFTWARE VERSION _________________________
DATE: _______________________________________
PRE-START-UP:
 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 PER INSTRUCTIONS
(including relocation of OAT sensor if necessary)
 VERIFY INSTALLATION OF ALL OPTIONS AND ACCESSORIES
 VERIFY PROPER INSTALLATION AND LOCATION OF STATIC PRESSURE TRANSDUCERS
(Supply Duct and Building Pressure when applicable)
 VERIFY THAT ALL ELECTRICAL CONNECTIONS AND TERMINALS ARE TIGHT
 VERIFY INSTALLATION AND LOCATION OF LAT SENSORS (multi-staged gas, SCR electric, hydronic heat only)
 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
COMPRESSOR AMPS — COMPRESSOR NO. 1 L1
COMPRESSOR AMPS — COMPRESSOR NO. 2 L1
SUPPLY FANS AMPS
*VAV fan supply amps reading must be taken with a true RMS meter for accurate readings.
TEMPERATURES
OUTDOOR-AIR TEMPERATURE
RETURN-AIR TEMPERATURE
COOLING SUPPLY AIR
GAS HEAT SUPPLY AIR
ELECTRIC HEAT SUPPLY AIR
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53480239-01
UNIT START-UP CHECKLIST
L1-L2 __________ L2-L3
(CV/SAV) ________
(VAV) _________ *
_________ F DB (Dry Bulb)
_________ F DB _________ F WB (Wet Bulb)
_________ F
_________ F (48A ONLY)
_________ F (50A ONLY, IF EQUIPPED)
Printed in U.S.A.
SERIAL NO.: _____________________________________
TECHNICIAN: ____________________________________
_________ L3-L1
_________ L2
_________ L2
EXHAUST FAN AMPS ___________
Form 48/50A-14T Pg CL-1
__________
___________ L3 _________
___________ L3 _________
5-19 Replaces: 48/50A-13T