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Table 13, Jumper Designations, Positions, and Control Settings
Operating Mode
Cooling/Heating
*IMPORTANT: The keypad cannot be unlocked without a jumper.
jumpers in case they are required in the future. To position a jumper in the Removed
position, place the jumper on only one pin. (Saving the jumper in case it is required in the
future.)
Changing Temperature Units
The A419 control is set at the factory to display in Fahrenheit temperature units.
Note: Make sure the Keypad Lock jumper is in the unlocked (installed) position before
adjusting the control. Verify that the control is displaying the desired temperature units
before setting the setpoint.
Setting the Setpoint
To view and adjust the setpoint, follow these steps:
Note: If no entries are made for 30 seconds, the control reverts to the temperature display.
Note: If the Menu button is not pressed after changing the setpoint, the control reverts to
the setpoint value previously programmed into the A419 control.
IOM 1062
Jumper Pins Designation
Function
on Control
(Top Pair of Pins on Block
Setpoint
(Bottom Pair of Pins on
Block P4)
Keypad Lock
P5-Keypad Unlock
To convert to Celsius units, press the Up and Down buttons
simultaneously. Press them again to return to Fahrenheit units.
1. Press and hold the Menu button until the display changes to flashing
SP. This will take about 2 seconds.
2. Press the Menu button again. The current setpoint is displayed.
3. Press the Up or Down button to adjust the setpoint temperature.
4. Press the Menu button to save. The display then returns to the sensor
temperature
Direct Drive Fluid Coolers
Setting
JUMP1
Cooling
Heating
P4)
JUMP2
At Cut-in
At Cut-out
Locked
Unlocked
.
Jumper
Factory Default Setting
Position*
(and Jumper Position)
Removed
Cooling
(Removed position)
Installed
Removed
Cut-in
(Removed Position)
Installed
Removed
Unlocked
(Installed Position)
Installed
Do not discard any
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