36
6.6.
Compressor and Humiditrol Operation
Table 23. 1-Compressor Humiditrol Default Operation (Using 2-Stage Wired Thermostat or Room Sensor)
Demands
Unit Operation
Thermostat
or Zone
Sensor
Economizer
Dehumidification
Free Cooling On
CP1 On
Reheat V
alve 1 On
Summary
Idle.
X
X
X
CP1 Reheat (Reheat Stage 1)
X
X
X
X
CP1 Reheat (Reheat Stage 1)
1st
X
CP1 Cool
1st
X
X
Free Cool
1st
X
X
CP1 Cool
1st
X
X
X
CP1 Cool
2nd
X
CP1 Cool
2nd
X
X
X
Free Cool, CP1 Cool
2nd
X
X
CP1 Cool
2nd
X
X
X
CP1 Cool
Free cooling operation is only available on units equipped with an economizer. Default dehumidification demand = RH (A91) > 60% (RH set point
ECTO 4.25). Optional dehumidification demand = P299-8 energized if ECTO 4.25 is set to 100 (digital demand). Heating demand overrides reheat.
Table 24. 2-Compressor Humiditrol Default Operation (Using 2-Stage Wired Thermostat)
Demands
Condition
Unit Operation
Free Air
Damper
(Economizer)
Reheat
Valve 1
Thermostat
Humidity
Sensor
Trigger
OAS
Compressor
Blower Speeds
1
2
Vent
Cool
C1
Cool
C2
Heat
G
Unoccupied
OFF
OFF
X
Closed
OFF
G
Occupied
OFF
OFF
X
Minimum
OFF
Y1
Suitable
OFF
OFF
X
Modulate up to
Maximum
OFF
Y2
Suitable
OFF
OFF
X
Modulate up to
Maximum
OFF
Y2
Damper position
and maximum
position and time
expired.
Suitable
ON
OFF
X
Maximum Open
OFF
Y1
Not Suitable
ON
OFF
X
Minimum
OFF
Y2
Not Suitable
ON
ON
X
Minimum
OFF
Dehum
ON
OFF
X
Minimum
ON
Y1
Dehum
ON
ON
X
Minimum
ON
Y2
Dehum
ON
ON
X
Minimum
OFF
W
OFF
OFF
X
Minimum
OFF