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Mode of Operation
The SC5812 is a programmable, manual or auto changeover, 3-stage heat, 2-stage cool thermostat. It
functions with air conditioning, heat pumps, gas, oil or electric heat systems. It is dual fuel compatible
and an outdoor sensor can be used to monitor the crossover temperature.
The thermostat activates the heating appliance when the room temperature is below the set heat
temperature (by the differential temperature) and the red indicator light (configurable) on the
thermostat will light. The SC5812 will stop outputting and the red light will turn off when the call for
heat has been satisfied. With heat pumps, the thermostat will not let the compressor come on for 4
minutes after it turns off. This protects your compressor.
When the room temperature is greater than the set cool temperature (by the differential temperature),
the cooling device is activated and the green indicator light (configurable) on the thermostat will turn
on. The SC5812 will stop outputting and the green light will turn off when the call for cooling is satisfied.
The thermostat will not let the compressor come on for 4 minutes after it turns off. This protects your
compressor.
The SC5812 has five possible operating modes: OFF, Heat, Cool, Heat & Cool, and Program mode. In
off mode, the thermostat will not turn on heating or cooling devices. The manual fan can be turned on
in all operating modes using the fan button. In heat mode, the thermostat controls the heating system.
In the cool mode, the thermostat controls the cooling system. In heat & cool mode, the thermostat
controls both the heating and cooling systems. In program mode, the thermostat will automatically be
controlled by the set program. Program mode can function with heat mode, cool mode, or heat & cool
mode. The clock display alternates with the set temperature display for heat & cool mode.
The program schedule can be overridden by changing the set temperature (up or down button). This
puts the SC5812 thermostat into a 2-hour temporary hold. After 2 hours, it will automatically return to
the program schedule.
The programmable fan feature can be used to recirculate air while in Program mode. It is activated
during the program schedule set up.
The SC5812 also has a button lockout feature. This enables the thermostat to be set to the proper
mode and temperature and locked so it cannot be tampered with.
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