5567611-BIM-B-1218
Johnson Controls Ducted Systems
63
Figure 29: Cooling operation piping schematic - circuit no. 1
Figure 30: Reheat operation piping schematic - circuit no. 1
Optional aux mode
The aux mode available with hot gas reheat units introduces an
operating mode that considers the dry bulb temperature in the
space when choosing hot gas reheat staging. The aux mode
reduces the amount of over cooling while maintaining humidity
control in the space. The aux mode is only applicable when the
unit is set up in the alternate reheat mode.
Evaporator
Coil
TXV
Check
Valve
Condenser
Coil
Airflow
Airflow
Reheat
Coil
Closed
Solenoid Valve
(SOL 2)
Accumulator
Compressor
Reheat Valve
(SOL 3)
Check
Valve
Open
Solenoid
Valve
(SOL 1)
Refrigerant Flow
Evaporator
Coil
TXV
Check
Valve
Condenser
Coil
Airflow
Airflow
Reheat
Coil
Closed
Solenoid
Valve
(SOL 1)
Accumulator
Compressor
Reheat Valve
(SOL 3)
Check
Valve
Open
Solenoid Valve
(SOL 2)
Refrigerant Flow