100
8.2.3. Internal disconnects
If you need to disconnect a specific assembly from line power to prevent it from starting
when power is restored, unplug it from the Power Distribution Panel, Figure 19.
9.
Maintenance
9.1.
Lockout / Tagout Procedure
9.1.1. ACM 150
Before accessing, testing, touching, or removing any electrical circuits, plates, or shields
in the ACM 150 monitor, disconnect the power following the procedure in Planned
shutdown For both line power and utility gases. The Main Power Switch, Figure 24, is
lockable in the Off position and provides Lockout / Tagout for the ACM 150 monitor. It
disconnects all electrical power within the system.
DANGER
Electrocution danger. The Main Power Switch is the tie point for line power, which
connects to terminals inside the switch. Before removing the cover to this switch
to access these terminals, disconnect line power via the external Lockout / Tagout
switch.
After appropriately locking and tagging the switch, verify with a voltmeter or
equivalent suitable device that all electrical voltage into the ACM 150 monitor has
been isolated and de-energized. This procedure should be followed for the integral
Lockout / Tagout switch and any external disconnects the user may have.
9.1.2. External
To allow safe access to the power terminals at the ACM 150 monitor, a means of
disconnecting line power at the source must be installed. For this purpose, an external
Lockout / tagout switch must be installed. Follow your company’s Lockout / tagout
procedure, shutting off and locking this switch when required.
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