Reheat Operation - Lennox LGH180H Installation Instructions Manual

T'stat and Humidity Demands
Reheat Only
Reheat & Y1
Reheat &Y1 & Y2
T'stat and Humidity Demands
Reheat Only
Reheat & Y1
Reheat Y1 & Y2
Reheat Y1 & Y2 & Y3
Cooling* and Humidity** Demands
Reheat Only
Reheat & Y1
Reheat & Y1 & Y2
Reheat & Y1 & Y2 & Y3
Reheat & Y1 & Y2 & Y3 & Y4
*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.

REHEAT OPERATION

Two-Stage Thermostat - Default
156, 180H, 210 (3-Compressors)
Compressor 1 & 2 Reheat
Compressor 1 & 2 Reheat and
Compressor 3 Cooling
Compressor 1, 2, & 3 Cooling
Three-Stage Thermostat (Transfer relay required)
156, 180H, 210 (3-Compressors)
Compressor 1 & 2 Reheat
Compressor 1 & 2 Reheat and
Compressor 3 Cooling
Compressor 1, & 2, Cooling
Compressor 1, 2, & 3 Cooling
Four-Stage Zone Sensor Mode
156, 180H, 210 (3-Compressors)
Compressor 1 & 2 Reheat
Compressor 1 & 2 Reheat and
Compressor 3 Cooling
Compressor 1, & 2, Cooling
Compressor 1, 2, & 3 Cooling
Compressor 1, 2, & 3 Cooling
The following conditions must be met before reheat will be energized:
(factory-default; see Unit Controller manual for other options)
TABLE 26
Operation
1
3
Operation
1
2
3
Operation
1
2
3
4
3- System must NOT be operating in heating
mode.
Page 51
240H, 300S (4-Compressors)
Compressor 1 & 2 Reheat
Compressor 1 & 2 Reheat and
Compressor 3 & 4 Cooling
Compressor 1, 2, 3 & 4 Cooling
240H, 300S (4-Compressors)
Compressor 1 & 2 Reheat
Compressor 1 & 2 Reheat and
1
Compressor 3 Cooling
Compressor 1 & 2 Reheat and
Compressor 3, & 4 Cooling
Compressor 1, 2, 3, & 4 Cooling
240H, 300S (4-Compressors)
Compressor 1 & 2 Reheat
Compressor 1 & 2 Reheat and
1
Compressor 3 Cooling
Compressor 1 & 2 Reheat and
Compressor 3 & 4 Cooling
Compressor 1, 2, & 3 Cooling
Compressor 1, 2, 3, & 4 Cooling
507124-04
1
3
3
4
2
3
5
3/2016