Primary States (Heat Recovery Glycol Loop) - Johnson Controls - Metasys - LIT-12011147 - Software Application - Controller Configuration Tool - 16.0

Off: Turn everything off. The Heat Recovery percent Cmd is set to 0%.

Max: The glycol valve is opened 100%.

Hold: Hold the outputs at their current position.

T Control: Modulate the glycol valve to control the Process Variable at the setpoint. This mode is used for heating only since the heat recovery device can provide more heat than what is required to condition the space. On the other hand, during cooling, the heat recovery device cannot produce enough cold air to condition the space.

LL-T Control: Modulate the glycol valve to control the Low Limit Variable. Normally the low limit variable is the glycol temperature, and this mode would be used to prevent the glycol temperature from dropping below freezing. If the Limit Variable is reliable, the module controls the output to maintain the Limit Variable at the Limit setpoint.