DESCRIPTION

An antenna ice melting control employs the CIT-XTV ice sensor located adjacent to the transmitting antenna. Normally located in the transmitter shelter building and within 2,000 feet of the sensor, the APS-3B or APS-4 control panel interfaces the sensor with the heater contactor. The sensor employs special filters and circuit design techniques to minimize susceptibility to EMI and lightning damage.
When using the CIT-XTV sensor, heaters operate at 38 F (3.3 C) during precipitation and for the hold-on timer interval, from 0-10 hours. The CIT-XTV sensor prevents heater operation at temperatures below 0 F (-17.8 C) to save electrical energy and to prevent partial ice melting. Heaters operate for the hold-on time as temperature increases above 0 F (-17.8 C) if precipitation occurred during lock-out.
The APS-3B and APS-4 control panels interface the sensor with the power control contactor. In addition to supplying 24 volts AC for the sensor operation, the panel provides status indicators, adjustable heater hold-on timer, and bypass switch.

The APS-3B panel is available in 120V single phase and operates 24 Amps. The APS-4 panel is available in 208-240V single phase, operating 40 Amps. The APS-4 panel is also available in 208V, 277V and 480V three-phase, operating 28 Amps per phase.



ORDERING INFORMATION

Order Number - Description

17797 - CIT-XTV sensor
17708 - APS-3B Control Panel (120V single phase / 24 Amps)
18708 - APS-4 Control Panel (208V three-phase / 28 Amps per phase)
18846 - APS-4 Control Panel (277V three-phase / 28 Amps per phase)
18331 - APS-4 Control Panel (480V three-phase / 28 Amps per phase)
17542 - RCU-1 Remote Control



LIMITED WARRANTY

ETI's two year limited warranty covering defects in workmanship and materials applies. Contact Customer Service for complete warranty information.



DISCLAIMER

Environmental Technology, Inc. makes no representations or warranties, either expressed or implied, with respect to the contents of this publication or the products that it describes, and specifically disclaims any implied warranties of merchantability or fitness for any particular purpose. Environmental Technology, Inc. reserves the right to revise this publication, and to make changes and improvements to the products in this publication, without the obligation of Environmental Technology, Inc. to notify any person or organization of such revisions, changes or improvements. The ETI logo, Snow Switch, Floorstat, Tracon, and Heat Systems are registered trademarks of Environmental Technology, Inc. We Manage Heat, Digital Anticipation, ComfortTouch, Dry Floors, LCD, APS, SC, GIT, SIT, CIT, ES, HSC, FWT, GPT, ADH, EDH, RCM, RCD, RCU, FMC, SMT are trademarks of Environmental Technology, Inc. Copyright 2000, All rights reserved.