2 chapter 2 – operating instructions, 1 introduction – Liebert 110V User Manual
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User Manual
Chapter 2 – Operating Instructions
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2 Chapter 2 – Operating Instructions
2.1 Introduction
The Network Power Switch can be considered to be in one of the three operating conditions:
• Normal Operation - All relevant power switches and fuses closed and the Load is connected to Network
Power Switch output
• Manual Bypass – The load is connected to the input supply directly.
• Shut down - All power switches are off and load is not operational.
2.2 General Notes
NOTE: All users controls and indicators mentioned in these procedures are identified in chapter1
Fig 2.1 - Power Connection details for Network Power Switch
2.3 Procedure for Switching the Network Power Switch to power the load from a Power Off
condition
This procedure should be followed when turning on the Network Power Switch from a fully powered down condition
-i.e. when the load is not being initially supplied at all. It is assumed that the installation is complete; the authorized
personnel have commissioned the system.
1. Select the priority to source1. Close the fuse FS1.
2. Check for the LED S1 healthy, S1 priority, S1 feed and LED load on source1 to glow.
3. Close the fuse FS2.
4. Check for the LED S2 healthy to glow.
5. Using priority switch transfer the load to source2, check this transfer does not affect the load.
6. Transfer the load to source 1 again and check this transfer does not affect the load.
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Input Fuse 1
Input Fuse 2
Rear View
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Potential
Free Contacts
External Cable