Automatic Snow/Ice
Melting System Controller
MODEL APS–3B Snow Switch® (PDF
Version  )
BENEFITS
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Automatic snow/ice melting control |
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Minimum energy costs |
FEATURES
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Controls mechanically-held contactors |
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Remote control/monitor (available option) |
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NEMA 3R enclosure |
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U-L Listed |
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Adjustable heater hold-on timer |
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Heater cycle push button |
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Multiple sensor capability |
DESCRIPTION
In conjunction with up to six sensors residing in target zones,
the microprocessor-based APS-3B provides effective, economical
automatic control of snow melting applications for walkways,
ramps, driveways, gutters and downspouts. Operating at either
120 volt or 208-240 volt, 50/60 Hz, the APS-3B's DPDT output
relay switches 24 Amp heater loads or directly operates both
mechanically and electrically held remote contactors.
The adjustable hold-on timer provides up to 10 hours of heater
operation after snowfall ceases, to complete snow/ice melting.
Independent of weather conditions, a manual heater cycle control
operates heaters for the hold-on period to clear tracked slush
and drifted snow. LEDs provide indication of power, sensor
status, heater operation and ground fault. Remote heater cycle
and system indication is provided by RCU-1 optional accessory.
The APS-3B nonmetallic enclosure is suitable for NEMA 1 through
3R, 12 and 13 applications over an ambient temperature range
of -40° to 136° F(-40° C to 58°).
For installation simplicity and low cost the sensor, CommLink
and RCU-1 wiring is NEC Class 2.
ORDERING INFORMATION
| Order Number |
Description |
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| 17708 - APS-3B |
Control Panel, 120 VAC (UL Listed) |
| 17539 - APS-3B |
Control Panel, 208-240 VAC (UL Listed) |
| 17542 - RCU-1 |
Remote Control Unit |
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.
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