7
PART NO.
24861
REV
A.0
INSTALLATION AND OPERATION 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 temperatures 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.
SETTING THE CONFIGURATION
FIELD 1: HOLD-ON TIME
1: off
2: 1 hour
3: 3 hours*
4: 5 hours
VALUES
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
There are three fields available for configuration. Each has
several numerical values possible, as follows:
* Default values
LCD-8 CONFIGURATION
The user is able to configure three operating parameters on the
Snow Switch Model LCD–8.
These are:
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.
The hold-on time in hours;
The temperature setpoint in degrees Fahrenheit; and
Low temperature lock-out operation.
•
•
•
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