WattMaster WM-WCC3-TGD-01B - Manual (Page 317)

4. SCUSCR.EXE SCREENS
WCC III Technical Guide 4-7
WCC III VAV BOX III Scheduling
Proportional Heating Signal
If the VAV box has hot water reheat using a proportional hot water
valve, it is a
0-10 VDC Voltage Signal.
Allow VAV Box Heat with AHU Heat
If the VAV box that you are using has reheat, confi guring this
setting will allow the VAV box heat to operate at the same time as
the HVAC unit heat.
This is the actual statement on the screen “Allow box heat to
Remain On in the HVAC mode at the same time as the HVAC
unit”
Options available are:
0 = No
1 = Yes
Main Fan Status
If the VAVBOX TUC-2R controller is installed on a non-fan
powered box that has reheat, set this option to “1” in order to
enable box reheat only when the HVAC unit fan is running. A full
description of how this setting affects the various box types in the
occupied and unoccupied modes is contained under the “Mode
Sequence” heading that follows later in this manual. This is the
actual statement on the screen “This Box Needs the Main Fan
Status.”
Options available are:
0 = No - Heat can operate without fan
1 = Yes - Heat cannot operate without fan
Scheduling
Occupied/Unoccupied Mode
The VAVBOX TUC-2R controller monitors the SAT 3d - TUC
communications loop for its Occupied and Unoccupied mode of
operation command. The SAT 3d Controller receives this occupied
or unoccupied command from the WCC III - MCD, and then the
SAT 3d transmits the occupied command to the VAVBOX TUC-2R
controller. This requires that the VAVBOX TUC-2R controllers all
be connected to the SAT 3d controller via the TUC communication
loop through their RS-485 connector and the VAVBOX TUC-
2R controllers to be properly addressed for the command to be
received.
Push-button Override Operation
During unoccupied hours, you can force the VAVBOX TUC-2R
controller back to occupied operation by pressing the override
button on the Flushmount sensor for a period of time less than 3
seconds. This initiates the override or resets the override timer back
to zero during unoccupied hours of operation. During Override
operation, the user can cancel the override by pressing the override
button for a period of time between 3 seconds and 10 seconds. This
restores the normal unoccupied operation.
On larger installations with several terminal units, the VAVBOX
Controllers can be confi gured into groups with the Global Binaries
so that an override generated by one VAVBOX Controller can cause
several other controllers to follow along and return to occupied
mode for the programmed duration. Other VAVBOX Controllers
not in the same group will simply maintain an unoccupied damper
or airfl ow setting as set by the user.
Push-button overrides (Logic Switch) are broadcast continuously
by the initiating VAVBOX Controller until the controller itself
times out or the override is cancelled by the user. These associated
logic switches are meant to be used in Global Binary broadcasts
which then can be used to force the air handler to start its main fan
and provide cooling or heating, if so confi gured.
NOTE: VAVBOX TUC-2R controllers will go into an
override condition for the user-programmed amount
of time when this button is pushed even if the unit is
already in an occupied condition.