Lennox LGH480

Page 55
507232-04 7/2017
TABLE 24
REHEAT OPERATION
Two-Stage Thermostat - Default
T'stat and Humidity Demands
Operation
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
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
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, 2, & 3 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
(ECTO 6.10, 6.12, 6.13, 6.14).
**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.
The following conditions must be met before reheat will be energized:
1- Blower must be operating.
2- System must be in occupied mode.
3- System must NOT be operating in heating mode.
4- One cooling demand is required if the unit has been in
heating mode, the Unit Controller has been reset, or at
initial unit start-up.