WattMaster WM-WCC3-TGD-01B - Manual (Page 357)

4. SCUSCR.EXE SCREENS
WCC III Technical Guide 4-47
Parallel Fan Powered Pressure Dependent Setpoint Screen
Stages of Box Heating
This confi gures the 2nd and 3rd relay on the relay expansion
board. We allow for up to 3 (three) stages of reheat for the four
different types of VAVBOX control. Entering a 0 confi gures the
relay expansion board to no stages of box heat, 1 corresponding
to 1 stage of box heat, 2 corresponding to 2 stages of box heat,
and 3 corresponding to 3 stages of box heat. See the sequence of
operation under the “Space Heat Mode” heading for further details
on specifi c operation.
Minimum Damper Position
This is the minimum position that the actuator will close to. This
depends on calibration of the Zone’s damper actuator. This allows
for both types of VAV zone dampers, 60 degree boxes, and 90
degree boxes. This also allows for air balancing of the system.
Maximum Damper Position
This is the maximum position that the actuator will open to. This
depends on calibration of the Zone’s damper actuator. This allows
for both types of VAV zone dampers, 60 degree boxes, and 90
degree boxes. This also allows for air balancing of the system.
Vent Mode Minimum Damper Position
This is the minimum position the zone damper’s actuator will go
to in the vent mode of operation. The TUC-2R is in vent mode
when the Space Temperature is between the heating and cooling
setpoints.
Heat Mode Minimum Damper Position
This is the minimum position the zone damper’s actuator will go to
in the heat mode of operation. The TUC-2R is in heat mode when
the Space Temperature is below the heating setpoints.
Unoccupied Mode Minimum Damper Position
This is the minimum position the zone damper’s actuator will go
to in the unoccupied mode of operation. This is determined by a
command from a WCC III – MCD central processor.
Fan “Turns on Below” Damper Position
The parallel fan will activate if the damper/airfl ow is below a user
defi ned low limit setting. This causes it to be used as a make-up air
source. When the damper/airfl ow rises 15% above the low limit
setpoint, the fan will be deactivated if there are no heating stages
active and no space demand exists.
Damper Direct or Reverse Acting
If the actuator is clockwise to open, then “0” (ZERO) should be
selected. If the actuator is counter-clockwise to open, the “1”
(ONE) should be selected.