Vertiv Liebert MC - Safety; Conventions; General Instructions; Electric System

1
Liebert
®
MC - UM - 10019237MAN_ENG - 31.03.2022
1. Safety
This chapter gives general safety instructions.
Additional safety warnings, for specic operations, are given in the rest of the manual.
1.1 Conventions
DANGER - Indicates a hazardous situation which, if not avoided, will result in death or serious injury.
WARNING - Indicates a hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION - Indicates a hazardous situation which, if not avoided, may result in minor or moderate injury.
NOTICE
Indicates a property damage message
1.2 General Instructions
Intended readers
This User Manual is intended for transport, installation and maintenance personnel.
The end user can only switch the unit ON and OFF
Authorized personnel
The operations described in this manual must be made by technical sta󰀨, expressly authorized in
compliance with the regulations in force at the installation site.
Read this manual Carefully read the manual before performing any operation on the unit.
Keep this manual
Keep the manual during the complete life-span of the unit.
If you move or sell the unit, transfer the manual together with the unit.
Intended use
Exclusively employ the unit for the purpose it has been designed (see 3. Intended Use).
The improper use of the unit exonerates the manufacturer of any responsibility.
Do not modify the unit
Do not modify the unit in any way, including the control system and the software.
Any modication to the unit exonerates the manufacturer of any responsibility.
Warning labels
Pay attention to the warning labels on the unit.
See Annex III – Safety Labels for the mapping of the safety labels placed on the unit.
1.3 Electric System
WARNING
Unit contains potentially lethal voltage in some circuits.
Risk of arc ash and electric shock.
Can cause injury or death.
• Open all local and remote unit electric power disconnect switches, verify with a voltmeter that power is OFF and
wear protective equipment per local standard before working within the electric control enclosure.
WARNING
The electric connection enclosures, the fan speed control and the EC fan enclosures can retain a stored high-voltage
electrical charge for up to 10 minutes.
Risk of electric shock.
Can cause serious injury or death.
Before working within the unit electric connection enclosures or working within the fan speed control and the EC fan
enclosures proceed as follows:
• open all local and remote unit electric power disconnect switches
• wait 10 minutes
• verify with a voltmeter that power is OFF
Only properly trained and qualied personnel may perform repair, maintenance and cleaning.