Robertshaw RS4000 Serie Manual Del Usuario página 6

dF = The differential keeps the thermostat from turning on for small
changes in temperature. When in Fahrenheit the range is 0.5 to 3.0
Degrees. In Celsius the range is 0.5 to 1.5 Degrees. The differential is
factory set at 1.0 F Degree (0.5 C Degree). This means that whenever
the room temperature is more than 1 F Degree (0.5 C Degree)
different from the set temperature the system will turn on. If the
system is turning on too often, increase the differential setting. Note
that a larger differential will mean the room temperature changes
more before the system turns on.
d2 = SECOND STAGE DIFFERENTIAL = Operates with the first stage to
control a second heating/cooling system. This number will be added
to the first stage differential (See: Two Stage Systems). If the first
stage is running too often lower the settings. This will turn the
second stage on to help the first stage. If both stages are coming on
too often then increase this setting to delay the second stage.
dL=SECOND STAGE DELAY = This timer starts when the first stage turns
on. It resets when the first stage turns off. If this timer runs out the
second stage will turn on (See Two Stage Systems).
db = Deadband for auto changeover = the number of degrees that the
room temperature can move away from the active setpoint until
heating or cooling is called for. The larger the deadband the more
the room temperature will vary. This can be from heat to cool or cool
to heat.
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