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EXPERT WW rev.12
EXPERT WW
6.5.2.3. Vent Door Calibration
If vent door (inlet) output 1 uses a potenti-
ometer, the actuator connected to this output
must be calibrated. This calibration tells the
controller what are the minimum and maxi-
mum positions of the vent door (inlet):
Minimum calibrated position=opening of 0%
Max. calibrated position=opening of 100%
1. Select:
Main menu
Vent/Inlet*
Calib**
* This menu is accessible if at least one vent door
(inlet) output enabled in the Installation Setup (sec-
tion 4.5). A password may also be required to access
this menu (section 4.2).
** This menu is accessible if vent door (inlet) output
1 uses a potentiometer (sec. 4.5).
2. Set the following parameters:
(Refer to the previous section to get further informa-
tion on these parameters).
Vent Door/Inlet 1 Calibration
Save Minimum Position? Yes
Save Maximum Position? No
Save minimum position?
—
To calibrate the mini-
mum position, use the
“Close”
switch to close
the vent door (inlet) to its minimum position.
Once it is closed, set the switch to
“Off”
to
stop the actuator.
Now that the actuator is closed, answer
“Yes”
to the
“Save minimum position?”
question on
screen. Once the
“Yes”
answer is posted, the
controller switches the answer back to
“No”
;
the minimum position is now saved.
6.5.3. Static Pressure-Based Vent
Doors (Inlets)
6.5.3.1. Principle of Operation
Static-pressure-based vent doors (inlets)
open or close as a function of the static
pressure level in the room. They open when
the static pressure level exceeds the high
pressure set point or close when the static
pressure level is lower than the low pressure
set point. The graph below illustrates this
process. Refer to chapter 5 to set the static
pressure set points.
Wind Effect Delay
When the pressure level exceeds the high
or low static pressure set point, vent doors
(inlets) wait for the end of the
Wind Effect Delay
before moving. They will only move if the high
or low pressure condition is still valid after
the delay has elapsed. This way, vent doors
(inlets) do not move if a wind draft causes
fleeting changes in the pressure level.
Pre-Opening Delay:
In minimum ventilation,
vent doors (inlets) open during the
“Pre-
opening Delay”
before the controller starts
the fans.
Closing Vent Doors (Inlets):
Vent doors
(inlets) can either close when the control-
Opening of Vent Doors (Inlets)
as a Function of Static Pressure
Time
Static
Pressure
The actuator
opens
The actuator
closes
Lo pressure
limit
Hi pressure
limit
The actuator
starts closing
after the Wind
Delay has
elapsed.
The actuator
starts opening
after the Wind
Delay has
elapsed.
The actuator
stops closing
The actuator
stops
opening
Wind
Effect
Delay
Wind
Effect
Delay
The
actuator does not
move
Save maximum position? —
To calibrate the maximum
position, use the
“Open”
manual control switch to
fully open the vent door. Once the maximum
opening is reached, set the manual control
switch to
“Off”
to stop the actuator.
Now that the actuator is opened, answer
“Yes”
to the
“Save maximum position?”
question
on screen. Once the
“Yes”
answer is posted,
the controller switches the answer back to
“No”
; the maximum position is now saved.
3. Once the calibration is
completed, set the manual
control switch back to the
“Auto”
position to enable
the automatic control of
the vent door.
For best results, make sure at least
12 inches (30 cm) separates the minimum
actuator’s position from its maximum
position.
ler enters in natural ventilation or when the
controller reaches a user-defined tunnel
ventilation stage. Refer to the Installation
Setup chapter to close vent doors in natural
ventilation (section 4.5) or refer to section
6.4.3 to choose at what tunnel stage vent
doors (inlets) must close.
