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Care of the Product
Clean the product by dusting with a dry cloth. Do not permit objects of any kind to be pushed and/or fall into the product through the enclosure openings.
General Description
The RKF-100 is a multi-directional fan system that uses three 4.75-inch (120 mm) whisper quiet fans, the speeds of which are governed by thermal sensing circuitry. The RKF-100 is designed to be used in three different formats -intake/blow/exhaust air. The required mode can be confi gured locally according to the cooling requirements of your system.
The RKF-100 has many other features and functions that are all described in the following pages.
Front Panel Description
The (removable) rack mountable front panel houses a switch for controlling the on/off and auto functions. A blue LED indicates when the unit’s fans are actually working.
Behind the grille front is a removable air-fi lter pad.
It is important to note that the only time the switch needs to be in the ‘on’ position is during an initial test when the fans will be operating at their maximum speed. Once the RKF-100 has completed its test, it is recommended that the switch be placed in its ‘auto’ position. In this mode neither the fans nor the LED will operate until the selected ambient temperature is reached.
Rear Panel Description
The following description identifies each of the main controls /connections and follows the rear panel from left to right.
Temperature Sensor
This input enables you to connect the (supplied) pigtail sensing cord. The magnetized ‘head’ should be placed on the ‘hot spot’ of your installation whereupon it will measure the ambient temperature, which in turn will govern the speed of the three fans.
Please note that there is also an in-built sensing device located on the underside of the chassis that is by-passed if the pigtail sensor is used. If the pigtail sensor is not used, then the in-built sensor will automatically activate once the selected minimum temperature has been reached.
English
Trigger In/Out 12VDC Mode
With the mode switch in the 12V position, and the ‘in’ input being used, the RKF-100 will move into its ‘auto’ mode whenever a 6V to 15V input signal is supplied and the prescribed initial temperature has been reached.
Should you want to use one or more RKF-100’s within the same location you can synchronize the units by using the ‘sync’ switch. For this situation you should use the ‘out’ jack from one unit (which then becomes the ‘master’) and go into the ‘in’ jack for the second unit (which then becomes the ‘slave’). The two units will now be ‘in sync’ and will start to work in unison once the prescribed initial temperature of the ‘master’ unit has been reached.
Note that in this type of multi-unit installation all of the internal temperature sensors of the ‘slave’ units are defeated.
Fan Auto-On Temperature
This switch enables you to pre-select one of two temperature settings for activating the RKF-100. The low setting is 95 degrees Fahrenheit (35 degree Celsius) and the high setting is 104 degrees Fahrenheit (40 degrees Celsius). This important feature ensures that the fans only work above the selected ambient temperature.
If you want to exhaust the hot air to the outside you will need to remove the two ‘plugs’ and attach fl exible tubing (not included with the unit). Please see page 4 for a fuller description of this feature.
Fill out and send in the owner’s registration card packed with the RKF-100. Also be sure to keep the original sales receipt. It is your best record of the date of purchase, which you will need in the event warranty service is ever required.
