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- Johnson Controls A419 User Manual
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Each A419 control includes a Johnson Controls/PENN A99 temperature sensor. The sensor may be removed and replaced with any compatible Johnson Controls A99 temperature sensor, or the wire leads on the sensor may be extended. See the Mounting and Wiring sections for additional guidelines and restrictions when mounting and wiring the control. A419 Series Electronic Temperature Controls with NEMA 1 or NEMA 4X Watertight Enclosures. Instruction manual, may cause harmful interference to radio communications. Operation of this equipment in. Each A419 control includes a Johnson Controls/PENN A99 temperature sensor. The sensor may be removed.
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Product/Technical Bulletin
A419
Issue Date
August 13, 2014
© 2014 Johnson Controls, Inc.
1
Code No. LIT-125188
www.johnsoncontrols.com
A419 Series Electronic Temperature Controls with Display
and NEMA 1 or NEMA 4X Watertight Enclosures
The A419 series controls are single-stage, electronic
temperature controls with a Single-Pole, Double-Throw
(SPDT) output relay. They feature a lockable
front-panel touchpad for setup and adjustment, and an
LCD for viewing the temperature and status of other
functions. An LED indicates the controls’ output relay
On/Off status. The A419 controls are available in 24
VAC or 120/240 VAC powered models.
temperature controls with a Single-Pole, Double-Throw
(SPDT) output relay. They feature a lockable
front-panel touchpad for setup and adjustment, and an
LCD for viewing the temperature and status of other
functions. An LED indicates the controls’ output relay
On/Off status. The A419 controls are available in 24
VAC or 120/240 VAC powered models.
The A419 controls have heating and cooling modes,
adjustable setpoint and differential, an adjustable
anti-short cycle delay, and a temperature offset
function. The setpoint range is -30 to 212°F
(-34 to 100°C). The controls feature remote sensing
capability and interchangeable sensors. The
A419 controls are available in either NEMA 1,
high-impact plastic enclosure suitable for surface or
DIN rail mounting or NEMA 4X watertight,
corrosion-resistant surface-mount enclosures.
adjustable setpoint and differential, an adjustable
anti-short cycle delay, and a temperature offset
function. The setpoint range is -30 to 212°F
(-34 to 100°C). The controls feature remote sensing
capability and interchangeable sensors. The
A419 controls are available in either NEMA 1,
high-impact plastic enclosure suitable for surface or
DIN rail mounting or NEMA 4X watertight,
corrosion-resistant surface-mount enclosures.
Figure 1: A419 Temperature Control with NEMA 1
Enclosure and A99 Temperature Sensor
Features and Benefits
Easy-to-Read Front-Panel
Liquid Crystal Display
Displays the sensed temperature and control-function
status clearly; custom icons on the display indicate the
control and system status at a glance
status clearly; custom icons on the display indicate the
control and system status at a glance
Wide Temperature Differential Adjustment
Range (1 to 30F° or C°)
Allows the user to set a precise (1F° or C°) temperature
differential from 1 to 30F° or C°; providing a much
tighter differential than electromechanical controls
differential from 1 to 30F° or C°; providing a much
tighter differential than electromechanical controls
Adjustable Anti-Short Cycle Delay
(0 to 12 Minutes in 1-Minute Increments)
Ensures that the output relay remains off for a user-set
time delay, which helps avoid hard starts, nuisance
overload outages, and unnecessary equipment wear
time delay, which helps avoid hard starts, nuisance
overload outages, and unnecessary equipment wear
Switch-Activated Temperature Offset
Function
Allows the user to shift the cut-in and cutout setpoints
by an adjustable offset based on the status of a
user-installed, external switch, such as a time clock
by an adjustable offset based on the status of a
user-installed, external switch, such as a time clock
High-Impact, Thermoplastic NEMA 1 or
NEMA 4X Watertight, Corrosion-Resistant
Enclosures
Enclosures
Increase application options, allowing surface and
snap-fit DIN rail mount, or Watertight surface mount
snap-fit DIN rail mount, or Watertight surface mount
Lockable Front Panel Touchpad
Allows easy set up and adjustment of the A419 control
setpoint, differential, and other functions; a concealed
jumper locks the touchpad, and deters unauthorized
adjustment of the control settings
setpoint, differential, and other functions; a concealed
jumper locks the touchpad, and deters unauthorized
adjustment of the control settings
Low- and Line-Voltage Models
Provide options for most refrigeration and HVAC
control-voltage applications
control-voltage applications
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Table of contentsJohnson Controls Freezer Thermostat
Johnson Controls A419 User Manual
- Application
- Operation Overview
- Adjustments
- Troubleshooting
Johnson Controls Room Thermostat
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