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Active Thermal Management
The trusted name in thermal protection…
Installation of the Cool-rack rack-mount ventilator
The Cool-stack II is a compact 2U high ventilator, well-suited for removing heated
air from mid-size rack installations. Some of the features of the Cool-rack are:
Automatic operation via a thermal probe and control assembly
• A bright temperature display
• Four 80mm high-quality fans for quiet ventilation
• Very low noise level
General description:
The Cool-rack is an exhaust-mode ventilator. It will usually be located at the top
of a rack, where its fans will pull heated air up from the equipment below and
exhaust it through its front panel.
There are installations in which there is a door or other obstruction in front of the
rack, making front exhaust impractical. In these situations, the Cool-rack could
be mounted to the rear rack rails, or it may be that an alternate ATM product
would be more suitable.
Installation:
1. Mount the Cool-stack II in a 2 rack-unit space at the top of a small or mid-size
rack, or just above the highest significant heat-producing equipment in a
larger rack.
IMPORTANT:
Install a 2U vent panel near the bottom of the rack or just below the heatproducing piece of equipment mentioned above to allow fresh air to enter.
25570 Rye Canyon Rd. Valencia, California 91355
(661) 294-7999 voice (661) 294-1115 fax
[email protected] www.activethermal.com
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2. Plug the wall-type power supply into an AC outlet that is always energized
(not "switched"). Do not connect the power supply to the Cool-rack yet.
3. Install the thermal probe. It should normally be fastened to or just above the
hottest part of the hottest component, usually the receiver or amplifier. It will
switch the Cool-rack on at 90 F (31C). In installations with several pieces of
heat-producing equipment, it may be preferable to position the thermal switch
assembly in the air above the highest heat producer where it can sense the
combined heat of all of the equipment. Note that this arrangement will slow
the response time of the Cool-rack, as the equipment will have to heat a
column of air, which will then heat the thermal probe.
4. Plug the power supply connector into the pigtailed jack at the back of the
Cool-rack.
5. The Cool-rack can now be tested. Heating the tip of the probe using an
ordinary hair dryer should start the fans turning when the display reaches
90F. Do NOT use an open flame (matches, cigarette lighters) or a heat-shrink
tubing gun for testing.
Changing temperature set-points:
• The turn-off temperature is set first, then the number of degrees above this
temperature at which the fans should turn on is set.
Press the
the fans will turn off. Change this temperature by pressing either the ▲or
▼ button, then press
• The turn-on temperature is set while the control module is in the “System
Parameter” mode. While there are several parameters that can be
adjusted, we will only concern ourselves with the differential, or “d” that
sets the difference between the turn-off and turn-on temperatures.
Example: --- If you want the fans to turn off at 85 degrees, and on at 90
degrees, the differential would be set to 5 degrees.
After entering this mode by holding down the
the display will show “HC”. Press the ▲ button once to change the display
to “d” (for “differential”), then press the
parameter. The display is now showing the present differential. Use the
▲and ▼buttons to select the desired differential, then either wait a few
seconds or press
button momentarily to see the present temperature at which
Set
again to exit the setting mode.
Set
button for 3 seconds,
Set
button again to select this (“d”)
Set
to return to normal operation.
Rst
25570 Rye Canyon Rd. Valencia, California 91355
(661) 294-7999 voice (661) 294-1115 fax
[email protected] www.activethermal.com
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