Acme PP-32 - Manual (Page 31)

31
PP-32
KOOLMASTER PP-32
REV.01
5.6 TUNNEL CURTAIN
The PP-32 allows you to control an endwall curtain for tunnel ventilation.
The tunnel curtain is controlled either by the static pressure level in the
barn or in timer mode, according to the room temperature. Select the
proper mode (Timer or Static pressure) that is used to control the tunnel
curtain in the installation setup (see sec 5.14.3).
In both modes, a minimum animal age is defined to avoid starting the
tunnel ventilation mode when animals are too young.
Tunnel Curtain Controlled in Time Mode:
Every time a tunnel fan stage starts, the curtain opens according to the
Open-Time related to this stage. A maximum running time is also set to
limit the curtain's opening.
When the start temperature of the first tunnel stage is reached, the
tunnel curtain opens during half of the opening time that is associated
with this stage. When half of the opening time has elapsed tunnel fans
are activated. When the next tunnel stage is reached, the tunnel curtain
continues to open according to the opening time defined for that stage,
etc. When the temperature decreases, the same sequence is executed in
reverse order. The following diagram sums up the operation of the first
two tunnel stages.
TUNNEL CURTAIN - TIMER MODE
STAGE A
TUNNEL FAN
ROOM T°
OFF
TUNNEL FAN
STAGES
STAGE A
TUNNEL FANS
TURN OFF
STAGE B
TUNNEL FAN
CURTAIN STARTS
OPENING, THEN STAGE A
TUNNEL FANS
TURN ON
STAGE B
TURN OFF
---------------------
CURTAIN CLOSES
DURING STAGE B
OPEN TIME DELAY
TUNNEL
FANS
STAGE B TUNNEL
FANS TURN ON
---------------------
CURTAIN OPENS
DURING STAGE B
OPEN TIME DELAY