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Electric Chain Hoists (Single Brake)
Model NECH
PAGE: 23
NECH-0214
ACI Hoist & Crane | 2721 NE 4th Ave Pompano Beach, FL 33064| 954.367.6116
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4.3
Prior To Operation
•
Before energizing the power supply, and inspecting and testing the hoist prior to initial operational use, check that
all electrical connections are in accordance with the wiring diagram.
•
ASME B30.16 requires that all new, altered, or modified hoists be inspected by a designated person prior to initial
use to verify that the equipment and installation comply with applicable provisions of the standard. Such an
inspection should be performed at this time, using ASME B30.16 as the basis for inspection procedures.
•
Energize the power supply to the hoist
4.3.1
Motor Phasing
Since motor rotation of a three-phase AC motor can be changed by reversing any two of the lines feeding power to the
motor, the direction of the hook motion must be checked to verify that it is correct in accordance with the hoist control device
markings. For example, when pressing up on the hoist pendant the chain should ascend.
To check hook motion direction and/or motor phasing do the following:
MOMENTARILY
activate the
UP
button of the hoist control device and observe the direction of the hook motion. If the
direction of the hook travel matches the direction marking of the hoist control device button activated then the hoist motor is
properly phased. If the direction of the hook travel does not match the direction marking of the hoist control device button
activated, for example when you press UP the hook descends; then the hoist motor is improperly phased and must be
corrected.
DO NOT
use the hoist until motor phasing is corrected.
Utilize the following steps to correct hoist motor phasing:
1.
Disconnect the power, lockout and tagout the power supply before working on the
electrical wiring to prevent accidental application of power.
2.
Only a qualified person should disconnect or connect the power lines to the hoist.
DO NOT
attempt to correct an improperly phased hoist by changing any wiring in the hoist control
device or at the hoist connectors; or by changing the markings on the hoist control device.
DO NOT
operate the hoist if the direction of the hook travel and the
marking on the hoist control device activated
DO NOT
match.
DO NOT
activate the down button of the hoist control device. If the hoist motor is
improperly phased, hook will move up and cause possible damage to the hoist.