WattMaster WCC II - Manual (Page 183)

Section 3: Screen Descriptions
WCC II Operator’s Guide
Operator Interfaces 3-151
Local Set: ______
If the front end computer quits communicating, the TUC-VR will
use the “Local Set” value as the cooling setpoint. The “Local Set”
values on the TUC-VR Screen will be used for the heating relay
setpoints and the terminal unit fan setpoints.
If power is cycled to the TUC-VR while the SAT II-B is off-line, the
TUC-VR will lose its setpoints from the SAT II-B and will try and
maintain the space temperature setpoint on the room thermostat.
The minimum and maximum velocity setpoints along with the
auxiliary setpoint will be obtained from the potentiometers on the
TUC-VR.
Note: If the fl ush mount temperature sensor is used, the
setpoint will default to 74 °F if the TUC-VR looks to the room
temperature sensor for the setpoint.
Dead Band Width (+/-): ______
Pulse Band Width (+/-): ______
“ “ Off Time: ____ Seconds
“ “ On Time: ____ Seconds
The deadband, pulse band, and pulse band ON/OFF inputs are not
active when using the SAT II-B controller.
Reverse Action Selected when _______ is _______
The “Normal” or “Reverse” control mode for the TUC-VR
actuator is chosen using this input. When this statement is TRUE,
the actuator operates in the “Reverse” mode and opens the primary
air damper on a call for heating. When this statement is FALSE, the
actuator operates in the normal control mode and the primary air
damper opens on a call for cooling.
The TUC-VR duct thermostat is not required for the morning
warm-up mode when the TUC-VR is used with an ECC/WCC II
system.
During morning warm-up, all TUC-VR relays are forced OFF,
and the TUC-VR will control the primary air damper to maintain a
space temperature equal to the heating setpoint. The minimum air
fl ow will be the minimum setting or 45% of the maximum setting,
whichever is greater.
Notes: