Johnson Controls A419 Series Installation Instructions

Table 2: Jumper Designations, Jumper Positions and Control Settings
Function
Jumper Pins Designation
on Control
Setting
Jumper
Position
Factory Default Setting
(and Jumper Position)
Cooling Mode Removed
Cooling/Heating
Operating Mode
JUMP1
(Top Pair of Pins on Block P4)
Heating Mode Installed
Cooling Mode
(Jumper Removed)
Setpoint
at Cut-in
Removed
Setpoint at
Cut-in or Cutout
JUMP2
(Bottom Pair of Pins on Block P4)
Setpoint
at Cutout
Installed
Cut-in
(Jumper Removed)
Locked Removed
Touchpad Lock P5
Unlocked Installed
Unlocked
(Jumper Installed)
The A419 Control Functions
Setpoint (SP) establishes the temperature value at
which the equipment is switched on or off, depending
on the user selected mode of operation. Setpoint
range is -30 to 212°F or -34 to 100°C (in 1-degree
increments).
If Setpoint mode is set to cut-in, setpoint is the
temperature value at which the control closes the
Normally Open (N.O.) contacts. If Setpoint mode is set
to cutout, setpoint is the temperature at which the N.O.
contacts open.
Differential (dIF) establishes the difference in
temperature between the cut-in value and cutout
value. The differential is set relative to Setpoint and
may be set from 1 to 30 F° or C° (in 1-degree
increments).
Anti-Short Cycle Delay (ASd) establishes the
minimum time that the output relay remains
de-engergized before the next on-cycle. The ASd
does not allow the output relay to re-energize until the
programmed time delay has elapsed. The delay is
activated when the control is first turned on and every
time an on-cycle ends. When the delay is activated,
the LCD alternately flashes the sensor temperature
and ASd. The Anti-short Cycle Delay range is
0 to 12 minutes (in 1-minute increments).
Sensor Failure Operation (SF) establishes how the
A419 control’s output-relay operates the equipment in the
event of a sensor or sensor wiring failure. The user may
select to run the equipment continuously or to shut it
down. When the control detects a sensor circuit failure,
the LCD flashes SF alternately with OP (if the sensor
circuit is open), or SH (if the sensor circuit is shorted).
Before indicating a failure, the control implements a
1-minute delay, which allows verification of failure
condition and avoids nuisance failure indications.
Temperature Offset (OFS) establishes a set
secondary Setpoint and Differential values that may
be invoked to control an application when a circuit is
closed between the binary input (BIN) and common
(COM) terminals (and BIN appears on the display).
See
Figure 3. Offset range is 0 to 50F° or C° (in 1-
degree increments). A typical application might use a
switching time clock to invoke night-setback
temperature settings.
IMPORTANT: Make sure the Touchpad Lock
jumper is installed (unlocked) before attempting to
adjust the A419 control functions. See Figure 5.
Changing the A419 Control Temperature Units
The A419 control is factory set to display Fahrenheit
temperature. To change to Celsius, press Up and
Down (arrows) simultaneously. Press them again to
display Fahrenheit units. Verify that the control is
displaying the desired temperature units before setting
the Setpoint.
Setting the A419 Control Setpoint Value
To view and adjust Setpoint, follow these steps:
1. Press and hold MENU (about 2 seconds) until the
display flashes SP.
2. Press MENU again to display the existing setpoint
value.
3. Press Up or Down (arrows) to change the setpoint
value.
4. Press MENU again to save the new value. The
display returns to the sensed temperature.
Note: If no setup entry is made for 30 seconds, the
control reverts to the (normal) temperature display.
4 A419 Electronic Temperature Control with NEMA 1 and NEMA 4X Watertight Enclosures Installation Instructions

Johnson Controls A419 Series Specifications

General

Brand	Johnson Controls
Model	A419 Series
Category	Temperature Controller
Language	English