Carrier 17/19EX - Manual (Page 139)

Inspect Wiring
1. Examine wiring for conformance to job wiring diagrams and to all applicable electrical
codes.
2. On low-voltage compressors (600 v or less) connect voltmeter across the power wires to
the compressor starter and measure the voltage. Compare this reading with the voltage
rating on the compressor and starter nameplates.
3. Compare the ampere rating on the starter nameplate with the compressor nameplate. The
overload trip amps must be 108% to 120% of the rated load amps.
Do not check voltage supply without proper equipment and precautions. Serious
injury may result. Follow power company recommendations.
WARNING
!
WARNING
CAUTION CAUTION
!
Do not apply any kind of test voltage, even for a rotation check, if the machine is
under a dehydration vacuum. Insulation breakdown and serious damage may
result.