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Figure 9, Cooling Modes
Heating Modes
When the Heating/Cut-in mode is selected, the differential is above Setpoint. The output
relay energizes and LED indicator illuminates when the temperature drops to Setpoint.
When the temperature rises to Setpoint plus the differential value, the output relay and LED
de-energize.
When Heating/Cut-out mode is selected, the differential is below Setpoint. The output
relay energizes and LED indicator illuminates when the temperature drops to Setpoint
minus the differential value. When the temperature rises to Setpoint, the output relay and
LED indicator de-energize.
Figure 10, Heating Modes
Adjustments
This section provides instructions for adjusting the A419 control using the jumpers and
keypad.
IMPORTANT:
Verify that the Cooling/Heating jumper is positioned properly before
powering the A419 control, so that the relay operates as intended.
Positioning the Jumpers
The P5 Jumper Pin Block has a single set of jumper pins and is used to lock or unlock the
keypad. The P4 Jumper Pin Block has two sets of jumper pins.
IOM 1062
Direct Drive Fluid Coolers
23
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