WattMaster WM-WCC3-TGD-01B - Manual (Page 364)

WCC III Technical Guide 4-54
4. SCUSCR.EXE SCREENS
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.
Airfl ow @ 1” WG Box Size
If this is a pressure independent box, this option allows you to
calibrate the box CFM correctly using the VAV box manufacturer’s
“K” factor. This “Box Size Constant for Airfl ow @ 1” WG” fi eld
is needed whenever you wish to have a pressure independent
operation of your VAVBOX. You must also have an Airfl ow
sensor attached to the VAV Box controller and have airfl ow fi ttings
connected to a airfl ow pickup tube. This fi eld requires that you
have from the VAV box manufacturer a chart, or at least a number,
that you then can fi ll in this fi eld. You must enter the correct “K”
(CFM) factor for the inlet diameter of the box you are confi guring.
For demonstration purposes, see Figure 4-3: TempMaster VAV
box CFM Sizing chart.
Minimum Airfl ow Setpoint
This is the minimum position in CFM 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 Airfl ow Setpoint
This is the maximum position in CFM 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 Airfl ow Setpoint
This is the minimum position in CFM that 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 Airfl ow Setpoint
This is the minimum position in CFM that 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 Airfl ow
This is the minimum position in CFM that 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” Airfl ow
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.
Parallel Fan Powered Pressure Independent Setpoint Screen