Stir Fans - Airstream EXPERT PN110 User Manual

EXPERT PN110
6.5.

Stir Fans

The controller can control one stir fan output.
This output can operate in 3 different ways:
1. Stir fans in hot temperature conditions:
If the temperature in the room is too high, stir
fans can be enabled to create an air draft to
cool down the animals. When they are used
for this purpose, stir fans start operating con-
tinuously when the room temperature reaches
the output's start temperature. The output is
disabled when the temperature falls below its
stop temperature (see graph on the right).
2. Stir fans in cold temperature conditions:
When the room temperature is too low, stir
fans can be activated to disperse the warm air
produced by heating units uniformly through-
out the building. When they are used for this
purpose, stir fans start running in timer mode
when the room temperature falls below the
output's start temperature. They are disabled
when the room temperature rises and reaches
the output's stop temperature (see graph on
the right).
3. Stir fans used to reduce temperature dif-
ferences between probes:
Stir fans can start running in timer mode when
there is a considerable temperature difference
between the reading of two probes. This func-
tion is used to ensure the uniformity of the
temperature in the house. When they are used
for this purpose, stir fans start running when
the difference of temperature between two
probes exceeds a user-defi ned temperature
limit; they stop when the temperature differ-
ence between the probes gets 0.5°F (0.3°C)
below the limit (see graph on the right).
26
EXPERT PN110 rev.23
Stir Fans in
Hot Temperature
Stir Fan
Output Conditions
On
Off
Stop T° Start T°
Stir Fans in
Stir Fan
Output
Cold Temperature
Conditions
On
Off
Start T°
Stop T°
Stir Fan Stir Fans to Reduce
Output
Temperature Differences
Between Probes
On
Off
0.5°F
Max T°
difference
Stir Fan Settings
1. Select:
» START / STOP TEMPS
6. Stir Fan*
»
*This parameter is acessible if the stir fan output is
enabled (see sec. 4.5).
Stir Fan 1 Settings
Hot Temp.
Cold Temp.
Probe Diff.
Hot Start Temp. 75.0
Hot Stop Temp.
Cold Start Temp 65.0
Cold Stop Temp. 65.5
Probe Diff. :
Room Cold & Probe Timer
T°
On Time 1:00(m:s)
Off Time 1:00(m:s)
2. Set the following parameters:
Hot temperature — Select "Yes" if you want
to use the stir fan output in hot temperature
conditions.
Cold temperature — Select "Yes" if you want
to use the stir fan output in cold temperature
conditions.
Probe differential — Select "Yes" if you want
to use the stir fan output to reduce tempera-
ture differences between probes.
Hot start/stop temperature — If stir fans are
used in hot temperature conditions, set the
Room
room temperature above which the output
T°
starts and below which it stops.
Cold start/stop temperature — If stir fans are
used in cold temperature conditions, set the
room temperature below which the output
starts and above which it stops.
Probe differential — If stir fans are used to
reduce temperature differences between
probes, set the maximum allowable tem-
perature difference. The output starts when
the difference between two probe readings
exceeds this value.
Cold and probe timer — Stir fans operate
according to a timer when they are used in
cold temperature conditions and when they
are used to reduce temperature differences
between probes. Set the on and off times of
T° differ-
the stir fan timer.
ence
between
2 probes
Yes
Yes
Yes
74.5
5.0