25
EXPERT WW rev.12
EXPERT WW
6.3.6. Purge
The purge function allows opening natural
ventilation curtains on a short period of time
to purge the air continuously.
Principle of operation:
When a purge cycle
starts, both curtains open during their re-
spective
“Purge Move Time”
. They then stay
still during the
“Purge Time”
. When this delay
has elapsed, both curtains return to their
initial position until the beginning of the next
purge cycle.
Frequency of the purge cycles
The frequency of purge cycles is determined
by the
“Purge Cycle Time”
. A new purge cycle
starts after that time delay has elapsed.
Purge cycles are not performed while the
controller is in tunnel ventilation.
Refer to section 6.3.3 to set the amount
of time each curtain need to open during
a purge cycle (Purge Move Time).
Purge Cycles
Purge Cycles
Purge
Move
Time
Purge
Move
Time
Purge
Time
Curtain
Position
Time
Initial
Position
6.4. Tunnel Doors
The controller can control the opening of
2 tunnel doors as a function of the static
pressure level or as a function of the average
temperature in the room. Refer to section 4.5
of this manual to choose the proper operat-
ing mode.
6.4.1. Pressure-based Tunnel
Doors
Beginning of tunnel ventilation:
The activa-
tion of tunnel ventilation is linked with the
activation of a user-defined fan stage: when
the start temperature of that fan stage is
reached, the controller starts controlling
tunnel doors according to the static pressure
level. It opens the doors when the pressure
level exceeds the high pressure set point
and closes them when the pressure level is
Opening of Tunnel Doors
as a Function of Static Pressure
Time
Static
Pressure
The actuator
opens
The actuator
closes
Tunnel
Lo pressure
limit
Tunnel
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
1. Select:
Main menu
Start/Stop*
Natural**
Purge ***
* A password may be required to access this menu.
** This menu is accessible if at least 1 natural ven-
tilation curtain is enabled in the Installation Setup
(section 4.5).
*** This menu is accessible if the purge option is
enabled in the Installation Setup (section 4.5).
Purge Settings
Purge Time
15 sec
Purge Cycle
180 min
2. Set the following parameters:
Purge Time —
Once they are opened, curtains
stay still during this amount of time before
returning to their initial position. Set the
“Purge Time”
to the desired value.
Purge Cycle —
This the amount of time that
separates two purge cycles. The cycle in-
cludes the
“Purge Move Time”
(sec. 6.3.3) and
the
“Purge Time”
. Set it to the desired value.
