Asetek InRackCDU Installation, Operation & Maintenance Guide 18
7
Routine Maintenance
There is a reservoir in the 4u InRackCDU cabinet. As the liquid cooling system runs, liquid gradually
permeates through the rubber tubing and plastic parts in the system. The reservoir contains sufficient
fluid to replenish the liquid that permeates out of the system for more than 50,000 hours of 24/7/365
operation. The RackCDU monitoring system will alert you when the fluid in the reservoir reaches a low
point. I
When a low coolant alert is received additional coolant may be added to the reservoir via a fill port at the
top of the RackCDU. The RackCDU must be filled with manufacturer provided server coolant. Using water
or other types of coolant will damage the server cooling system!
7.1
Check Reservoir Level and Refill As Necessary
The reservoir is located behind the front panel on the CDU cabinet. To access the reservoir, remove the
front of the CDU cabinet and push/lift and swing out the lever. The reservoir will eject out of the cabinet.
Unscrew the plug with a 22mm wrench from the fill port and apply cooling liquid with a small funnel
until the liquid level is 1 cm (0.5 in) from the top of the opening. Keep the reservoir in an upright
position when refilling to prevent spilling.
Reservoir
Reservoir
Locking Lever
Front panel
