Mode of Operation
The SC4211 is a non-programmable, manual or auto changeover, 2-stage heat pump thermostat . An
outdoor sensor can be used to monitor the outdoor temperature .
The thermostat activates the heating appliance when the room temperature is below the set heat
temperature (by the differential temperature) and the red AUX indicator light (during electric strip heat
operation) on the thermostat will light . The SC4211 will stop outputting and the red light will turn off
when the call for heat has been satisfied . 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 . The SC4211 will stop outputting 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 SC4211 has five possible operating modes:
OFF
,
Heat
,
Emergency Mode
,
Cool
, and
Cool & Heat
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 emergency mode, the compressor is locked out and the electric strip heat is
used to satisfy the heat call . In the cool mode, the thermostat controls the cooling system . In heat &
cool mode, the thermostat controls both the heating and cooling systems . The clock display alternates
with the set temperature display for heat & cool mode .
The SC4211 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 .
