The CDP-2 faceplate can be grounded to reduce the chances of damage due to static shock. This can be
an important consideration when operating in a very dry environment in the winter. Remove 1 in.
(25mm) of insulation from the green EGND lead and connect this lead to an electrical ground lead using
a wire nut or equivalent.
Install the CDP-2 into the electrical enclosure using the two screws provided. The screws are compatible
with both metallic and non-metallic enclosures. Once installation is complete a “modular” electrical cover
plate can be installed. Compatible types include the Leviton® Decora® and Hubbell® Styleline series.
EXTERNAL CONTROL/MONITOR OPERATION
The CDP-2 indicators show the current setting of the manual override
switch for the attached snow sensor, either MANUAL ON, AUTOMATIC,
or STANDBY. The sensor override switch will also override any current
CDP-2 commands. Whenever the sensor’s switch overrides the CDP-
2’s setting, then returns to AUTOMATIC mode, the CDP-2 will also
return to AUTOMATIC mode. The sensor override switch should be
left in the center AUTOMATIC position to allow the CDP-2 to control
the system.
The CDP-2 provides three pushbutton switches; STANDBY, AUTOMATIC,
and MANUAL ON. The respective LED indicators for each control
reflect the current operating mode of the snow sensor. Note that,
to save energy, the LED indicators blink periodically rather than
remaining steadily illuminated.
Pressing STANDBY will set the connected snow sensor to ignore snow fall and prohibit automatic the CDP-
2 is designed for use either indoors or outdoors with proper protection from the elements.
A “Delay Off” drying cycle time is configured on the snow sensor with a time delay of 30-90 minutes.
It begins once snow stops falling and allows the heated surface to more thoroughly dry. For example, if the
cycle is set for 30 minutes and snow falls for 2 hours the snow sensor will operate the snow melt system
for 2 hours, 30 minutes. Switching the sensor override switch to the MANUAL ON position will cause the
sensor to close its relay, illuminate the CDP-2 MANUAL ON and DEICE ON indicators, and activate the snow
melt system continuously. Pressing the MANUAL ON button on the CDP-2 will not trigger the sensor to
run continuously but will initiate one drying cycle. This mode can be used to test the system or clear any
remaining unmelted snow. This function allows the user to run a cycle without having to remember to
shut the system back off. The sensor will initiate one drying cycle and revert to automatic mode, ready
for detection. The MANUAL ON mode can be activated directly from either AUTOMATIC or STANDBY mode.
The user may clear the drying cycle by pressing STANDBY. Note that a properly working unit will not show
a MANUAL ON indication during this cycle but will show AUTOMATIC with a DEICE ON indicator.
The DEICE ON indicator shows whether or not the attached snow sensor has been activated and the snow
melting system is operating.
