© Munters AB, 2015
18
NOTE:
The Heater Temperature Band applies to radiant heaters as well. For example, if the Heat
Temperature is 80º F and the Heater Temperature Band is 1º F, then heaters turn on at 79º F
and off at 80º F. If the Radiant Low Differential is at 2.0º F, than radiant heaters turn off at
82º F, and on 1º F below that at 81º F. However, a Radiant High Heater turns on regardless
of its temperature setting for the Radiant Ignition Time whenever the corresponding Radiant
Low Heater turns on. This feature ensures proper flame ignition.
Figure 5: Radiant Heater Differentials
3.1.3
C
YCLE
H
EATERS
|
S
ET
D
EFINITIONS
Heat Cycle means providing heat in conjunction with the ventilation system during minimum ventilation
cycles, using heaters and fans connected to relays. When enabled, heaters operate during the fans’
cycle off time (as defined in the Levels of Ventilation Cycle Timer On and Off parameters). How does it
work?
Between the Heat Temperature and the differential temperature, heaters do not operate. When the
temperature goes below the Heat Off temperature minus the Low Heat Differential:
•
Heaters begin to operate when the exhaust or tunnel fans are off. Heaters operate for the
Minimum On Time.
•
If the temperature continues to drop, heaters operate for longer periods of time, up to the
Maximum On Time (defined in Levels of Ventilation).
•
Farm Premium automatically generates a curve.
In this example:
•
Temperature Curve Heat Off is 78°.
•
Low Heat Differential is 1°.
•
High Heat Differential is 8°.
•
Minimun On time is 30 seconds.
•
Cycle Off time is 270 seconds.
