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Table 22. 4−Compressor Humiditrol Default Operation (using 2−stage Thermostat)
Demands
X
X
X
X
X
X
X
1st
X
X
1st
X
X
1st
X
X
X
1st
X
X
X
X
2nd
X
X
2nd
X
X
X
X
2nd
X
X
X
2nd
X
X
X
X
Free cooling operation is only available on units equipped with an economizer. Default dehumidification demand = RH (A91) > 60% (RH setpoint ECTO
4.25). Optional dehumidification demand = P299−8 energized if ECTO 4.25 is set to 100 (digital demand). Heating demand overrides reheat.
Table 23. 4−Compressor Humiditrol Default Operation (using 4−stage Thermostat DDC with Zone
Demands
X
X
X
X
X
X
X
1st
X
1st
X
X
1st
X
X
X
1st
X
X
X
X
2nd
X
X
2nd
X
X
X
2nd
X
X
X
2nd
X
X
X
X
3rd
X
X
3rd
X
X
X
X
3rd
X
X
X
3rd
X
X
X
X
4th
X
X
4th
X
X
X
X
4th
X
X
X
4th
X
X
X
X
Free cooling operation is only available on units equipped with an economizer. Default dehumidification demand = RH (A91) > 60% (RH setpoint
ECTO 4.25). Optional dehumidification demand = P299−8 energized if ECTO 4.25 is set to 100 (digital demand).
506457−01 05/10
Summary
Idle.
X
X
CP1 Reheat, CP2 Reheat (Reheat Stage 1)
X
X
CP1 Reheat, CP2 Reheat (Reheat Stage 1)
CP1 Cool, CP2 Cool
Free Cool
X
X
X
X
CP1 Reheat, CP2 Reheat, CP3 Cool, CP4 Cool (Reheat Stage 2)
X
X
X
X
CP1 Reheat, CP2 Reheat, CP3 Cool, CP4 Cool (Reheat Stage 2)
X
X
CP1 Cool, CP2 Cool, CP3 Cool, CP4 Cool
Free Cool, CP1 Cool, CP2 Cool
X
X
CP1 Cool, CP2 Cool, CP3 Cool, CP4 Cool
X
X
CP1 Cool, CP2 Cool, CP3 Cool, CP4 Cool
Summary
Idle.
X
X
CP1 Reheat, CP2 Reheat (Reheat Stage 1)
X
X
CP1 Reheat, CP2 Reheat (Reheat Stage 1)
CP1 Cool
Free Cool
X
X
X
CP1 Reheat, CP2 Reheat, CP3 Cool (Reheat Stage 2)
X
X
X
CP1 Reheat, CP2 Reheat, CP3 Cool (Reheat Stage 2)
CP1 Cool, CP2 Cool
Free Cool, CP1 Cool
X
X
X
X
CP1 Reheat, CP2 Reheat, CP3 Cool, CP4 Cool (Reheat Stage 3)
X
X
X
X
CP1 Reheat, CP2 Reheat, CP3 Cool, CP4 Cool (Reheat Stage 3)
X
CP1 Cool, CP2 Cool, CP3 Cool
Free Cool, CP1 Cool, CP2 Cool
X
CP1 Cool, CP2 Cool, CP3 Cool
X
CP1 Cool, CP2 Cool, CP3 Cool
X
X
CP1 Cool, CP2 Cool, CP3 Cool, CP4 Cool
X
X
Free Cool, CP1 Cool, CP2 Cool, CP3 Cool, CP4 Cool
X
X
CP1 Cool, CP2 Cool, CP3 Cool, CP4 Cool
X
X
CP1 Cool, CP2 Cool, CP3 Cool, CP4 Cool
Unit Operation
Sensor)
Unit Operation
Page 24
6.
Reheat Operation
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