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ETI MODEL APS-3B Snow Switch. Automatic Snow/Ice Melting System Controller.
We are an authorized stocking distributor for ETI (Environmental Technology Inc.)
Links to other ETI products:
MODEL RCU–1 REMOTE CONTROL UNIT.
MODEL CIT–1 Snow Sensor
MODEL GIT–1 Automatic Gutter Deicing Control
MODEL SIT–6E Pavement-Mounted Sensor
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.
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