User manual ROTEL RKF-100

[. . . ] Fill out and send in the owner's registration card packed with the RKF-100. It is your best record of the date of purchase, which you will need in the event warranty service is ever required. Do not use attachments not recommended in this owner's manual as they may cause hazards. [. . . ] The operating voltage cannot be changed by the user and any attempt to do so will void the warranty. Caution: To prevent electrical shock do not use this (polarized) plug with an extension cord, receptacle or other outlet unless the blades can be fully inserted to prevent blade exposure. For added protection for this product during a lightning storm or when it is left unattended and unused for long periods of time, it is recommended that you unplug the unit from the wall outlet. This will prevent damage to the product due to lightning or power line surges. Rotel products are designed to comply with international directives on the Restriction of Hazardous Substances (RoHS) in electrical and electronic equipment and the disposal of Waste Electrical and Electronic Equipment (WEEE). The crossed wheelie bin symbol indicates compliance and that the products must be appropriately recycled or processed in accordance with these directives. Do not permit objects of any kind to be pushed and/or fall into the product through the enclosure openings. 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. 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. [. . . ] If the pigtail sensor is not used, then the in-built sensor will automatically activate once the selected minimum temperature has been reached. The RKF-100 is a versatile system that enables you to configure the direction of the airflow in many different ways according to the specific needs of your installation. Be sure to disconnect the power supply before removing the top cover. [. . . ]