Aerial-Mount Snow Sensor for Snow Melting Systems
About the Sensor
The interleaved grid on the top of the aerial sensor is the precipitation or "moisture" sensor. The brass cylinder protruding from the bottom of the enclosure is the temperature sensor. For reliable rain and snow detection the unit must be mounted in a location that exposes the moisture sensor to a clear view of the sky. DO NOT mount the unit directly under eaves or so close to the ground that it may become buried in snow. For proper temperature detection the WS-2C must be mounted outdoors, away from furnace vents, dryer vents, and other sources of heat. (When powered, the WS-2C moisture grid always remains warm. This is normal, and allows the sensor to continuously melt snow and evaporate precipitation from the grid.
Additional Snow Sensor Features
Terminate your wiring to the pre-installed pigtails on the WS-2 in a metal weatherproof two-gang junction box. The WS-2C is housed in a PVC enclosure with dimensions of 4.75 x 7 x 2.75-inches. The WS-2C weighs just 2 pounds, so the snow sensor can be easily secured and supported.
While all of the operational switches and set points have been pre-set at Warmzone (with the notable exception of the voltage jumpers), the user may access all electronics by unscrewing the four Phillips head screws and removing the front cover.
Automatic Activation - Warmzone's aerial-mount snow sensor system is designed to detect temperature and precipitation. When moisture is present and the temperature reaches the preset temperature (usually set at 39°F.), it signals the master controller, activating the radiant heated driveway / snow melting system. It automatically shuts off afterwards, resulting in energy-efficiency and low operating costs.
Adjustable Temperature Set Point - You can
adjust the set temperature in which the snow melting
sensor activates the system. This is known
as the trigger temperature (TT). Using the
TEMP ADJUST control, you can set the temperature
anywhere from 34° to 44°F. When
ambient air temperature is below this trigger point
and the sensor detects precipitation, the
moisture detected is assumed to be snow or
freezing rain. When the temperature is above the
trigger point, precipitation is assumed to
Upgradeable Remote Activation - You can
monitor and control your ClearZone
snow melting system from inside your home.
The remote control panel is mounted on a
1.75 x 19-inch standard rack mount panel and can be
installed anywhere in your home. (The panels
have a range of up to 1200 feet.) The
control panel provides basic DEICE ON
status for the deicing system, along with MANUAL ON,
AUTOMATIC, and STANDBY control capabilities.
Adjustable Delay Off Cycle - The "Delay Off" function refers to the sensor's drying cycle timer. The timer allows the snowmelt system to dry the heated surface through evaporation after the precipitation has stopped. This reduces the chance of melted snow/ice from refreezing into ice by completely drying the surface. The timer restarts each time the sensor detects precipitation, so the snow sensor will continue to operate as long as precipitation is detected and then for the Delay Off period after the precipitation has stopped. A minimum 2-minute closure to reduce cycling of an external controller or feed blower is provided in all the "sensor" modes. When in "Controller" mode, the Delay Off time can be adjusted from 30 to 90 minutes by using the DELAY ADJUST control.
Full 30A @ 240VAC Control - The peak power
consumption of Warmzone's aerial snow sensor is 15
watts, and it can be powered from a 100-120
VAC or 200-240 VAC 50/60Hz source. The voltage
selection is performed by installing the jumpers
provided onto the printed circuit board. The
sensor provides a single 240 VAC @ 30A
normally open load contact set. This contact set is
paralleled with a low power contact set to
provide remote activation monitoring.
Operational temperature range is -40vC to +85vC.