39
Figure 43
To return to the SERVICE MENU, press the
Esc
key.
2.2.4.1.1
Deadbands
The default settings for the Deadbands can be modified on the screen
shown in Figure 44. The Heating Deadband value is subtracted from
the Zone Temperature Set point from section 2.2.2. This value is the
heating set point that enables the auxiliary air heating output, and is
the process variable for the Air Heating PID loop. The Cooling
Deadband value is added to the Zone Temperature Set point. This
value is the cooling set point. When the zone temperature exceeds this
calculated value, circuit A is enabled for zone cooling. The Clg Stage
Deadband is then added to the calculated cooling set point. This value
is then used as the set point to enable circuit B for zone cooling. The
RH Stage Deadband is added to the Zone Humidity Set point and is
used to enable circuit B for zone dehumidification. To modify settings,
press the
ENTER
key until the desired set point is selected and use
the arrow keys until the desired value is shown. Press the
ENTER
key
to accept set point value. See Graphic in Figure 45 and Figure 46 for
an illustration of the operation of the compressor circuits and damper
actuators. Figure 45 shows the operation of an SA unit without an
exhaust fan or an SA unit with an exhaust fan & in unoccupied mode.
Figure 46 shows the operation of an SA unit in occupied mode.
Desert Aire - CM3510 Manual
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