WarmlyYours SCV-DUAL - Manual (Page 12)

Snow Switch ® Model LCD–8 Aerial Snow Controller, 100 – 240 VAC
24782 Rev. A 03/13 (800) 234-4239 http://www.networketi.com 11 of 14 Environmental Technology, Inc.
Setting the configuration
There are three fields available for configuration. Each has several numerical
values possible, as follows:
Field 1: Hold-On Time
Values 1: off
2: 1 hour
3: 3 hours*
4: 5 hours
Field 2: Operating Temperature
Values 1: none (precipitation sensor)
2: 36°F / 2.2°C
3: 38°F / 3.3°C*
4: 40°F / 4.4°C
Field 3: Low Temperature Lockout
Values 1: disabled*
2: enabled
*default value
2 second pause
4 second pause; to top
2 second pause
3 hour hold-on
38°F / 3.3°C
Low temperature
lockout disabled
Figure 7. LED response, default configuration
LCD-8 Configuration
The user is able to configure three operating parameters on the Snow Switch
Model LCD–8.
These are:
• the hold-on time in hours;
• the temperature set point in degrees Fahrenheit; and
• low temperature lock-out operation.
The definitions of each of these parameters, as well as how to determine their
current setting and how to change those settings, will be explained in this section of
the manual.
HOLD-ON TIME
Hold-on time refers to the number of hours that the heaters will continue to
operate once the unit no longer detects precipitation. Hold-on time ensures that
not only is all the snow melted from the protected surface, but also that the system
continues to dry and evaporate the surface without refreezing. The factory default
hold-on time setting is 3 hours.
TEMPERATURE SET-POINT
The temperature set-point refers to the temperature at which the LCD-8
activates the heaters given the presence of moisture. When set to its default, “Off,”
the controller activates the heaters based only on the presence of moisture at any
temperature. The factory default temperature set point is 38°F (3.33°C).
LOW TEMPERATURE LOCK-OUT
The low temperature lock-out function disables unit operation in tempera-
tures less than 17°F (–8.33°C) in those climates or during those seasons where it
is simply too cold to make operation practical. The factory default low temperature
lock-out setting is Off, meaning that the unit will try to activate the heaters regard-
less of ambient temperature.