Airedale OnRak 3kW 35kW - Manual (Page 11)

IT Cooling LogiCool
™ OnRak
IT Cooling
11
Technical, Installation and Maintenance Manual :6912497 V1.5.0 02_2013
Dual Power Supply Dual supply for redundancy and backup in the event of mains supply failure shall be
provided. The dual power supply switch ensures that the OnRak always has an
incoming power supply.
For the dual power supplies to operate effectively, the incoming power supplies must
have the same voltage and frequency and be within 120° Phase Angle.
Rack Mounted The dual power supply changes from primary to the secondary within a period of 5ms
(1/4 of a cycle)
Selection can be made to determine primary power supply.
Under floor Dual Power
Supply
The dual power supplies use C14 / C13 socket combinations for ease of use.
Uninterrupted Power
Supply Uninterrupted power supply shall be supplied to enable power backup in the event of AC
power loss. The UPS system ensures the OnRak can still maintain its cooling function.
The UPS is available in 1U and 2U profiles.
Static Transfer Switch An ATS can be supplied allowing monitoring of primary power loss. With this loss
detected a second power supply can be selected, and therefore resume power.
Available in 2U profile.
Supply A
Supply B
Primary Supply
Selection Switch
Supply A
Supply B