Active Thermal Management System 2 Users Guide

Active Thermal Management

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System 2 Installation Instructions – 2017

The Active Thermal Management System 2, a self-contained ventilating system
for small-to-midsize enclosures with moderate heat loads, has been redesigned
for 2017. It consists of two 120mm fans on a mounting board which also holds a
thermal control board with a remote sensor. A small display on the control board
is meant for set-up only. It reads in degrees Celsius, not Fahrenheit.

The System 2 is mounted over a 14 1/2" x 5 1/2 " rectangular hole (not exact ­verify this dimension with the System 2 to be installed) located at the hottest part
of the enclosure, usually at the top rear, and moves this air out into the room.The
foam strips around the base of the System 2 will provide an air-tight seal.

Provision must be made to allow room air to enter the enclosure to replace the
hot air being expelled by the System 2. A location low in the enclosure is
generally preferred; the best arrangement is that in which air enters and passes
by the heat-generating equipment on its way to the System 2's exhaust fans.
Avoid locating the inlet too close to the System 2; room air may enter and be
immediately exhausted without cooling the enclosure or equipment.

An air inlet improperly located or too small will prevent the System 2 from
operating efficiently.

After mounting the fan panel, connect the output lead from the power supply to
the power jack attached to the control board, and run the thermistor to the vicinity
of the hottest area within the rack. The thermistor can be fastened using the
adhesive-backed anchor supplied. Direct connection to the heat source will
cause the fans to come on sooner than a less-direct connection, such as
suspending it over, rather than on, a hot component.

Plug the power supply into an always-live AC source. When the temperature at
the thermistor reaches approximately 90F/32C degrees, the fans will begin to
turn. The fans will stop when the temperature falls below approximately 85F/29C.
A hair dryer can be used to check for proper operation.

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Thermistor

To change the temperature at which the fans turn ON, press the SET button on
the control board momentarily; the display will blink. Press the ▼ or ▲ buttons to
change to the desired temperature. After a few seconds, the new temperature will
be stored.

To change the temperature at which the fans turn OFF, decide how many
degrees below the turn-on temperature you wish the fans to stop, called the
differential. (The factory setting is 3 Celsius degrees, or about 5 Fahrenheit
degrees.) To change the differential:
Hold the SET button for 5 seconds. P0 will be displayed. * Press the ▲button
once to change the display to P1, then press SET again. The present differential
temperature will be displayed. Use the ▲ and ▼buttons to set the desired
differential. The display will return to displaying system temperature after a few
seconds; the new differential temperature has been stored.

For your convenience, here are some Fahrenheit temperatures and their Celsius
equivalents, rounded to the nearest whole degree:

75F = 24C 80F = 27C

85F = 29C 90F = 32C

95F = 35C 100F = 38C

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*Pressing the ▲ or ▼ buttons again will cycle the display through the following
codes: P1, P2, P3, P4, P5, P6, and back to P0. Many of these codes refer to
parameters used in heating and refrigeration systems, not in cooling systems.
Should any be adjusted accidentally, restore them to their factory settings:

P0 – C (for “cooling”)
P1 – Desired differential, set as described above
P2 - 110
P3 - -50
P4 - 0
P5 - 0
P6 – Off

25570 Rye Canyon Rd. Valencia, California 91355
[phone] voice [phone] fax

[e-mail] www.activethermal.com