Adjustments, Positioning the jumpers, Figure 12 – Johnson Controls A419 Series User Manual

Page 7: D figure 13, Figure 13, E figure 13

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A419 Series Electronic Temperature Controls with Display and NEMA 1 or NEMA 4X Watertight Enclosures

Product/Technical Bulletin 7

Adjustments

This section provides instructions for setting up and
adjusting the A419 controls using the jumpers and
touchpad.

Positioning the Jumpers

The P5 Jumper Pin Block has a single set of jumper
pins and is used to lock or unlock the touchpad. The
P4 Jumper Pin Block has two sets of jumper pins.

The top set of pins at P4, labeled JUMP1, is used to
set the control for Heating or Cooling mode. The
bottom set of pins, labeled JUMP2, is used to establish
Setpoint at cut-in or at cutout. See Figure 12.

To position a jumper in the Installed position, place the
jumper on both pins. To position a jumper in the
Removed position, place the jumper on only one pin.
(Save the jumper in case it is required in the future.)
See Figure 12.

Position the jumpers as follows. See Figure 12, Figure
13,
and Table 2.

1.

Verify that all power sources to the A419 control
have been disconnected.

2.

Remove the control’s cover by loosening the four
captive cover screws.

3.

Position the jumpers to set Cooling/Heating,
Setpoint, and Touchpad Lock functions.

4.

Replace the cover and fasten in place with the
four screws.

5.

Restore power to the control.

IMPORTANT: Verify that the Cooling/Heating
jumper is positioned properly before powering the
A419 control, to ensure that the relay operates as
intended. See Figure 13 and Table 2.

Jumper

Pins

Removed

(Jumper Positioned on One Pin)

Installed

(Jumper Positioned on Both Pins)

=

=

Figure 12: Positioning the Jumpers

P5

P4

Touchpad

Locked

Touchpad

Unlocked

Heating Mode

Cut-in at Setpoint

Heating Mode

(Standard)

Cut-out at Setpoint

Cooling Mode

(Standard)

Cut-out at Setpoint

Cooling Mode

Cut-in at Setpoint

JUMP1

JUMP2

Figure 13: Jumper Positions and Control Settings

Table 2: Jumper Designations, Jumper Positions and Control Settings

Function

Jumper Pins Designation
on Control

Setting

Jumper
Position*

Factory Default Setting
(and Jumper Position)

Operating Mode
Cooling/Heating

JUMP1
(Top Pair of Pins on Block P4)

Cooling

Removed

Cooling
(Removed position)

Heating

Installed

Setpoint

JUMP2
(Bottom Pair of Pins on Block P4)

At Cut-in

Removed

Cut-in
(Removed Position)

At Cut-out

Installed

Touchpad Lock

P5-Touchpad Unlock

Locked

Removed

Unlocked
(Installed Position)

Unlocked

Installed

Note: The touchpad cannot be unlocked without a jumper. Do not discard any jumpers in case they are required in the
future.

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