The following table describes the attributes used by the Heat Recovery Wheel with Bypass Dampers modules.
Name |
Type
1
|
Description |
Default Value |
---|---|---|---|
Cooling Control Status |
V |
PID Status. The possible values are Normal, Overridden, Disabled, Low, Timing Low, High, and Timing High. |
Normal Set Name: Control Status |
Cooling Mode |
Desired cooling mode of operation. |
Off Set Name: AHU HR Cl EW |
|
EA FBD Modulated |
Indicates whether the EA face and bypass damper is modulated or set to the EA FBD Value when the state is T Control or LL-T Control. |
True |
|
EA FBD Value |
Indicates the position of the EA face and bypass damper when EA FBD Modulated is set to False. |
100% |
|
Heat Recovery Exhaust FBD Cmd |
V |
Contains the analog signal sent to the exhaust face and bypass damper. |
0% |
Heat Recovery OA FBD Cmd |
V |
Contains the analog signal sent to the OA face and bypass damper. |
0% |
Heat Recovery OnOff |
V |
Binary signal to the Enthalpy Wheel. |
Off Set Name: Off/On |
Heat Recovery Suitability |
Indicates whether the heat recovery may be used for cooling control, heating control, or unsuitable for either control. The enumeration set is Heat, Cool, or None. |
None Set Name: AHU HR Suit |
|
Heating Control Status |
V |
PID Status. The possible values are Normal, Overridden, Disabled, Low, Timing Low, High, and Timing High. |
Normal Set Name: Control Status |
Heating Mode |
Desired heating mode of operation. |
Off Set Name: AHU HR Ht EW |
|
HR-OUTSTATE (State) |
V, G |
Indicates the current operational mode of the output controller. |
Off Set Name: AHU HR Ht EW |
Low Limit Process Variable |
Low limit temperature process variable, normally connected to a sensor located in the exhaust duct after the Heat Recovery device. |
4 °C, 39 °F |
|
Low Limit Setpoint |
Low limit temperature setpoint. |
4 °C, 39 °F |
|
OA FBD Modulated |
Indicates whether the OA face and bypass damper is modulated or set to the OA FBD Value when the state is T Control or LL-T Control. |
True |
|
OA FBD Value |
Indicates the position of the OA face and bypass damper when OA FBD Modulated is set to False. |
100% |
|
Output Overridden |
Indicates when the actual output that is controlled by this output controller is overridden by a user. |
False |
|
Output Position |
Provides the current Present Value of the output that this controller drives. |
0% |
|
PID Tuning Reset |
Causes the PID objects to reset their tuning parameters to the default based on the appropriate Process ID. |
Normal Set Name: PID Tuning Reset |
|
Process ID |
Specifies the type of process that this output controller is controlling when the mode is T Control. The Discharge Air Temperature process variable has a Process ID of DA-T. The Zone Air Temperature process variable has a Process ID of ZN-T. The Exhaust Air Temperature process variable has a Process ID of EA-T. |
DA-T Set Name: Process ID |
|
Process Units |
Specifies the units for the PID. For this particular module, °C and °F are the only two valid values. |
°C, °F Set Name: Unit |
|
Process Variable |
Control temperature, and it may be connected to either Zone temperature, discharge air temperature, or exhaust air temperature. The latter signal is expected to come from a sensor in the exhaust duct upstream of the enthalpy wheel. |
13 °C, 55 °F |
|
Setpoint |
Desired setpoint for the process variable to be controlled to when the mode is T Control. |
13 °C, 55 °F |
C - Configuration Mode Only, G - Default Element (Generated State, if applicable), SC - Simulation and Commissioning Modes Only, V - Calculated Value (Outputs)