Sytrin Nextherm ICS 8200 - Page 6

Written by Randy Torio    Saturday, 11 June 2005 11:00
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Cooling

The AC unit for the Nextherm is the most innovative component, which utilizes the same technology found in a unit that John reviewed a while ago.  The unit is wired to the LCD readout on top of the case, which is directly wired to the power supply.  The idea behind the AC unit is the use of thermoelectric cooling to cool down the incoming air.

A thermoelectric plate is used to cool down the copper heatsink, while the hot part of the plate is cooled  through the bottom of the case, via a perforated mesh grill and a metal blower.  The incoming air from the intake fan is then blown through the cold heatsink, and the cold air is blown in and redirected through a duct into the system.  Theoretically, you can achieve case temps that are lower than the outside ambient air temperatures, lowering overall component temperatures as well.  Notice how a temperature probe is placed directly in front of the intake fan.  This is how the LCD unit calculates "Tamb", the ambient temperature from the outside as indicated by the LCD readout.  The LCD screen is the perfect method to view how this AC unit functions.

Operation of the AC unit is easy.  There are two buttons on the LCD readout that dictate the overall mode of the AC unit.  The bottom button is the power button to power the LCD screen.  You can tell that the screen is on once the beautiful blue backlit LCD lights up.  The top button is the function button that determines the overall mode of the AC unit.  Once the LCD unit is turned on, the temperatures of the two temperature probes and outside ambient outside air are displayed.  The two temperature probes are manually placed by the user.  In the pictures above, the AC unit is still off and is marked by a red triangle warning sign with the word "off" shown on the bottom left.  The power meter also displays the amount of power being used per 100 watts.  This meter provides a good indication of whether or not the power supply is supplying enough power to the system.