VARISTAR LHX 20
Device description
Cooling module 60714-050
www.schroff.biz
6
R2.1, May 10, 2012
2.3 Air loop
The heat generated by the electronic components housed in the 19" plane
collects in the rear section of the cabinet. The fans of the cooling module draw
the heated air away and feed it into the air/water heat exchanger. The heat
energy is thus transferred to the water loop. The cooled air is then returned to
the front section of the cabinet.
A droplet separator draws off any condensation that may form.
The condensation is collected in a condensation vessel and discharged via the
condensate drain at the front of the LHX 20 module.
The use of 6 fans, positioned vertically over the entire cabinet height, ensures
that a homogenous temperature gradation is obtained. The temperature
difference may thus be reduced and the efficiency of the cooling system
increased.
Air loop components:
• Air/water heat exchanger
• Droplet separator
• Fans
• Air temperature sensors
2.4 Water loop
Cooling water from the external chiller passes through the air/water heat
exchanger of the cooling module, absorbs heat from this and returns to the
chiller. Temperature control is obtained via a servo-driven control valve that
regulates the water flow rate according to the cooling capacity required.
Please see the piping and instrumentation diagram in the Appendix for further
information.
Water loop components:
• Control valve
• Air/water heat exchanger
• Water temperature sensors
Note:
The control valve is in fact a three-way valve that functions as a straight-
way valve since the bypass has been factory sealed. If required, the cover seal
can be removed by Schroff Service to provide three-way functionality.
