Carrier WeatherExpert 48N2 Controls, Start-Up, Operation, Service, And Troubleshooting page 257

Pre-Start-Up Checklist for 48/50N-Series Packaged Rooftop
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 preceding sec-
tions of this Controls, Start-Up, Operation, Service and Trouble-
shooting document.
I. Project Information
Job Name __________________________________________________________________________________________________
Address ____________________________________________________________________________________________________
City ___________________________________________________________ State ____________________ Zip ______________
Installing Contractor ________________________________________________________ Phone ___________________________
Equipment tag / Mark for ______________________________________________________________________________________
Sales Office _________________________________________________________________________________________________
Pre-Start-up Performed by _____________________________________________________ Phone __________________________
Unit Model (18 Chars) ____________________________________________ Serial (10 Chars) ____________________________
Design Information
Supply Airflow
(CFM)
II. Prestart-Up
Is there any physical damage?
Description _________________________________________________________________________________________________
___________________________________________________________________________________________________________
Verify that all packing materials have been removed from unit

Verify installation of economizer hoods per installation instructions

Verify installation of condensate drains and traps per installation instructions

Verify watertight interface between unit and curb (roof-mounted units)

Verify removal of supply fan shipping brackets per installation instructions

Verify removal of return fan shipping brackets (if equipped) per installation instructions

Verify compressor mounting bolt torque is 7 to 10 ft-lb. (9.5 to 13.5 n-m)

Verify installation of ductwork to unit or curb per installation instructions

Verify clearances around unit per installation instructions

Verify that power supply agrees with the unit nameplate

Verify that electrical power wiring is installed properly per installation instructions

Verify that unit is properly grounded per NEC/ETL

Verify installation of electrical disconnect per installation instructions

Verify that electrical circuit protection has been sized and installed properly per NEC/ETL

Verify that all terminals are tight

Verify that all plug assemblies are tight

Inspect all cables and thermistors for crossed wires and correct as needed

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53480165-01
(Remove and use for job file)
Return Air Temperature (RAT)
External Static
Pressure (ESP)
Dry Bulb (DB)
No Yes
 
Printed in U.S.A.
Wet Bulb (WB)
If yes, has the trucking company been contacted?
Form 48-50N-7T
Supply Air
Temperature
Pg CL-1 12-2020
Condenser
Entering Air
Temperature
Yes No
 
Replaces: 48-50N-6T