Johnson Controls A419 Series Product/Technical Bulletin

Johnson Controls A419 Series Product/Technical Bulletin

Electronic temperature controls with display and nema 1 or nema 4x watertight enclosures
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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 a
Liquid Crystal Display (LCD) for viewing the
temperature and status of other functions. A
Light-Emitting Diode (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.
Easy-to-Read Front-Panel
Liquid Crystal Display
Wide Temperature Differential Adjustment
Range (1 to 30F° or C°)
Adjustable Anti-Short Cycle Delay
(0 to 12 Minutes in 1-Minute Increments)
Switch-Activated Temperature Offset
Function
High-Impact, Thermoplastic NEMA 1 or
NEMA 4X Watertight, Corrosion-Resistant
Enclosures
Lockable Front Panel Touchpad
Low- and Line-Voltage Models
© 2003 Johnson Controls, Inc.
Code No. LIT-125188
®
Features and Benefits
Product/Technical Bulletin
Figure 1: A419 Temperature Control with NEMA 1
Enclosure and A99 Temperature Sensor
Displays the sensed temperature and control-function
status clearly; custom icons on the display indicate the
control and system status at a glance
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
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
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
Increase application options, allowing surface and
snap-fit DIN rail mount, or Watertight surface mount
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
Provide options for most refrigeration and HVAC
control-voltage applications
Issue Date
February 10, 2003
www.johnsoncontrols.com
A419
1

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Summary of Contents for Johnson Controls A419 Series

  • Page 1 A419 Issue Date February 10, 2003 ® 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...
  • Page 2 This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications. A419 Series Electronic Temperature Controls with Display and NEMA 1 or NEMA 4X Watertight Enclosures Product/Technical Bulletin...
  • Page 3: Operation Overview

    0 to 12 minutes in 1-minute Output Relay increments. Status Indicator Figure 5: A419 Control Front-Panel with Display A419 Series Electronic Temperature Controls with Display and NEMA 1 or NEMA 4X Watertight Enclosures Product/Technical Bulletin...
  • Page 4 (SPST) contacts. Closing a circuit between the BIN differential value, the relay and LED de-energize. and COM terminals activates the Temperature Offset. See Wiring. A419 Series Electronic Temperature Controls with Display and NEMA 1 or NEMA 4X Watertight Enclosures Product/Technical Bulletin...
  • Page 5 LED indicator de-energize. Temperature Heating/Cut-in Cut-out (Off) Differential Cut-in (On) Heating/Cut-out Setpoint Cut-out (Off) Differential Cut-in (On) Figure 8: Heating Modes A419 Series Electronic Temperature Controls with Display and NEMA 1 or NEMA 4X Watertight Enclosures Product/Technical Bulletin...
  • Page 6 (COM). See Figure 9, Figure 10, and Figure 11 for (if used) terminal strip location. Sensor Load Figure 11: Wiring the 240 VAC A419 Control A419 Series Electronic Temperature Controls with Display and NEMA 1 or NEMA 4X Watertight Enclosures Product/Technical Bulletin...
  • Page 7 Installed Note: The touchpad cannot be unlocked without a jumper. Do not discard any jumpers in case they are required in the future. A419 Series Electronic Temperature Controls with Display and NEMA 1 or NEMA 4X Watertight Enclosures Product/Technical Bulletin...
  • Page 8 A419 control reverts to the previously saved setpoint value. Any saved A419 control setting values are non-volatile and remain in the control’s memory during power interruptions. A419 Series Electronic Temperature Controls with Display and NEMA 1 or NEMA 4X Watertight Enclosures Product/Technical Bulletin...
  • Page 9: Troubleshooting

    Any saved A419 control setting values are non-volatile and remain in the control’s memory during power interruptions. A419 Series Electronic Temperature Controls with Display and NEMA 1 or NEMA 4X Watertight Enclosures Product/Technical Bulletin...
  • Page 10 Reconnect the sensor leads and supply power to the control. e. Replace the cover. Check the control settings for proper values. A419 Series Electronic Temperature Controls with Display and NEMA 1 or NEMA 4X Watertight Enclosures Product/Technical Bulletin...
  • Page 11: Repairs And Replacement

    CLK350-2C Digital Clock 7-Day Programmable Digital Clock for controlling Temperature Offset Function WEL11A-601R Immersion Well Immersion Well for applying sensor in fluid applications A419 Series Electronic Temperature Controls with Display and NEMA 1 or NEMA 4X Watertight Enclosures Product/Technical Bulletin...
  • Page 12: Technical Specifications

    The performance specifications are nominal and conform to acceptable industry standards. For application at conditions beyond these specifications, contact Application Engineering at 1-800-275-5676. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products.

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