Asetek InRackCDU Installation, Operation & Maintenance Guide 5
1.4
Server to CDM Tube Sets
The CDMs are connected to the server liquid coolers via pairs of connecting tubes. One tube is used to
deliver cooled (supply) liquid to the server. The other returns heated (return) liquid from the servers to
the heat exchangers for heat rejection into facilities liquid.
1.5
Coolant
The server coolant in InRackCDU systems is a mixture of DI water, propylene glycol with some additional
additives for corrosion resistance. It is a safe, environmentally friendly liquid. It provides freeze protection
and inhibits corrosion and biological growth within the system. The coolant is not a “Hazardous Chemical”
as defined by the OSHA Hazard Communication Standard, 29 CFR 1910.1200. A Material Safety Data Sheet
(MSDS) for the coolant is included in the packaging.
