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TABLE 30
REHEAT OPERATION
Two-Stage Thermostat - Default
T'stat and Humidity Demands
Operation
240 (4-Compressors)
Reheat Only
Compressor 1 & 2 Reheat
Reheat & Y1
Compressor 1 & 2 Reheat and
Compressor 3 & 4 Cooling
1
Reheat &Y1 & Y2
Compressor 1, 2, 3 & 4 Cooling
3
Three-Stage Thermostat (Transfer relay required)
T'stat and Humidity Demands
Operation
240 (4-Compressors)
Reheat Only
Compressor 1 & 2 Reheat
Reheat & Y1
Compressor 1 & 2 Reheat and
Compressor 3 Cooling
1
Reheat Y1 & Y2
Compressor 1 & 2 Reheat and
Compressor 3, & 4 Cooling
3
Reheat Y1 & Y2 & Y3
Compressor 1, 2, 3, & 4 Cooling
4
Four-Stage Zone Sensor Mode
Cooling* and Humidity** Demands
Operation
240 (4-Compressors)
Reheat Only
Compressor 1 & 2 Reheat
Reheat & Y1
Compressor 1 & 2 Reheat and
Compressor 3 Cooling
1
Reheat & Y1 & Y2
Compressor 1 & 2 Reheat and
Compressor 3 & 4 Cooling
2
Reheat & Y1 & Y2 & Y3
Compressor 1 Reheat, Compressor 2, 3, & 4 Cooling
3
Reheat & Y1 & Y2 & Y3 & Y4
Compressor 1, 2, 3, & 4 Cooling
5
*Cooling stage is initiated when zone temperature is higher than the cooling setpoint plus the appropriate stage differential.
**Reheat demand is initiated when relative humidity is higher than relative humidity setpoint.
1
If there is no reheat demand and outdoor air is suitable, free cooling will operate.
2
If there is no reheat demand and outdoor air is suitable, free cooling and compressor 1 will operate.
3
If there is no reheat demand and outdoor air is suitable, free cooling and compressor 1 and 2 will operate.
4
If there is no reheat demand and outdoor air is suitable, free cooling, compressor 1, 2 and 3 will operate.
5
If there is no reheat demand and outdoor air is suitable, free cooling, compressor 1, 2, 3 and 4 will operate.
1- Blower must be operating.
2- System must be in occupied mode.
The following conditions must be met before reheat will be energized:
(factory-default; see Unit Controller manual for other options)
3- System must NOT be operating in heating
mode.
