About Advanced Features & Operation
34
DEADBAND OPERATION - Controls heat pump up to three Heat and
two Cool stages and heat/cool up to two heat and two cool stages.
The 1st Stage of heat or cool is turned on when:
(A) The temperature spread from the setpoint is equal to or greater
than: the setpoint plus the 1st stage deadband (Setup Step 15).
This 1st stage deadband is adjustable from 1-6 degrees and the
default is two degrees.
The 2nd Stage of heat or cool is turned on when:
(A) The 1st Stage has been on for a minimum of time as specified in
minutes between 1st and 2nd stage (Setup Step 17), default is 2
minutes.
AND
(B) The temperature spread from the setpoint is equal to or greater
than: the setpoint plus the 1st stage deadband, plus the 2nd stage
deadband (Setup Step 16).
The 3rd Stage of heat is only available in heatpump applications and is
turned on when:
(A) The 2nd Stage is running for a heat demand.
AND
(B) The temperature spread from the setpoint is equal to or greater
than the setpoint plus the 1st stage deadband, plus the 2nd stage
deadband plus the 3rd stage deadband. The 3rd stage deadband
is fixed at two degrees and is not adjustable.
TURNOFF TEMPERATURE - once started, the second stage will turnoff
at either the same temperature at which it started or remain on until
the first stage turns off. 2nd STAGE TURNOFF POINT (Setup Step 18)
specifies if second stage turns off at its turn on point (deadband) or
keeps running longer (setpoint).
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