Zoned Heater - Airstream INTER 2V4SA User Manual

INTER 2V4SA
10.2. Zoned Heater
To configure your system for zoned heaters,
set internal switch #8 to ON. Since the two
heater outputs function independently, dif-
ferent probes are assigned to each output:
Probes 1 and 2 are assigned to Heater 1 and
Probes 3 and 4 are assigned to Heater 2. In-
dividual probes can be turned on or off using
the internal switch settings. If both probes
are activated for a given heater, the average
temperature from both probes is used.
Both heating zones can have negative and
positive heater offsets. A negative offset
is used when controlling heat mats, for
example.
To avoid ventilation problems when using
zoned heating, a special protection is built
into the device. Suppose the animals are
young and confined to one part of the build-
ing (zone 1) while the rest of the building is
heated at a minimum level (zone 2). If the
temperature difference between zones is
too great and zone 1 fans operate according
to the average temperature for both zones,
cooling in zone 1 may be insufficient. A built-
in protection will operate the fans according
to the probes of the zone with the highest
temperature whenever the temperature dif-
ference between zones is greater than a
user-defined value.
Zone 2
Probes 3 & 4
Not used :
minimum heat
Zone 1
Probes 1 & 2
Young animals
Zoned Heater
Heating
Stage
Status
On
Off
Heater
Differential
If the room temperature rises:
• at Set Point - Heater Offset 1 (Probes 1-2):
Heater 1 turns off.
• at Set Point - Heater Offset 2 (Probes 3-4):
Heater 2 turns off.
If the room temperature falls:
• at Set Point - Heater Offset 1 - Differential
1 (Probes 1-2): Heater 1 turns on.
• at Set Point - Heater Offset 2 - Differential
2 (Probe 3-4): Heater 2 turns on.
INTER 2V4SA, rev.02
T°
Heater
Offset
Set Point
29