| Вид документа | Технічний документ |
|---|---|
| Виробник | JCI |
| Код документа | A419-Series-Electronic-2 |
| Сторінок | 12 |
| Мова документа | англійська |
| Розмір файлу | 0.2 МБ |
Текст документа
Product/Technical Bulletin A419
Issue Date August 13, 2014
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.
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, Figure 1: A419 Temperature Control with NEMA 1
corrosion-resistant surface-mount enclosures. Enclosure and A99 Temperature Sensor
Features and Benefits
Easy-to-Read Front-Panel Displays the sensed temperature and control-function
Liquid Crystal Display status clearly; custom icons on the display indicate the
control and system status at a glance
Wide Temperature Differential Adjustment Allows the user to set a precise (1F° or C°) temperature
Range (1 to 30F° or C°) differential from 1 to 30F° or C°; providing a much
tighter differential than electromechanical controls
Adjustable Anti-Short Cycle Delay Ensures that the output relay remains off for a user-set
(0 to 12 Minutes in 1-Minute Increments) time delay, which helps avoid hard starts, nuisance
overload outages, and unnecessary equipment wear
Switch-Activated Temperature Offset Allows the user to shift the cut-in and cutout setpoints
Function 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 Increase application options, allowing surface and
NEMA 4X Watertight, Corrosion-Resistant snap-fit DIN rail mount, or Watertight surface mount
Enclosures
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
Low- and Line-Voltage Models Provide options for most refrigeration and HVAC
control-voltage applications
© 2014 Johnson Controls, Inc. 1
Code No. LIT-125188 www.johnsoncontrols.com
Application Dimensions
9/64 2-3/8
IMPORTANT: The A419 Series Temperature (3.7) (61)
Controls are intended to control equipment under
normal operating conditions. Where failure or
malfunction of an A419 Series Control could lead to 1/2
(13) 5
an abnormal operating condition that could cause DIN MENU
(127)
2-15/16 Rail
personal injury or damage to the equipment or other (75)
property, other devices (limit or safety controls) or 4
(102)
systems (alarm or supervisory) intended to warn of
or protect against failure or malfunction of the A419
Series Control must be incorporated into and
1-9/16 7/16 2-3/8
maintained as part of the control system. (40) (11) (61)
The A419 Electronic Temperature Control can be used Sensor
2-3/8
to control a wide variety of single-stage refrigeration or 2 (61)
HVAC equipment. Typical applications include: 1/4 (50) 7/8
(6) (22)
• retail store display freezers and reach-in coolers 7/8 (1/2 in. Trade Size)
(22) Conduit Hole
• supermarket display cases for produce/meats
• retail store walk-in coolers and freezers Figure 2: A419 Temperature Control with
NEMA 1 Enclosure, Dimensions, in./(mm)
• boiler operating control (used as a thermostat)
2-1/4 1-1/16
• condenser fan cycling or staging (56) (27)
• cooling tower pump and fan control 1-3/4
(44)
• space and return air temperature control
A419
FCC Compliance 6-5/8
(168)
This device complies with Part 15 of the FCC Rules. MENU
Operation is subject to the following two conditions: 6-1/8
(1) this device may not cause harmful interference, (155)
and (2) this device must accept any interference that
may cause undesired operation.
This equipment has been tested and found to comply
with the limits for a Class A digital device pursuant to
Part 15 of FCC rules. These limits are designed to 2-13/16
(71) Position the A99 sensor
provide reasonable protection against harmful
in the bracket at the bottom of
interference when this equipment is operated in a the A419 NEMA 4X enclosure.
commercial environment. This equipment generates, 2-13/16
uses, and can radiate radio frequency energy and, if (71)
not installed and used in accordance with the
instruction manual, may cause harmful interference to
radio communications. Operation of this equipment in
a residential area may cause harmful interference, in Figure 3: A419 Temperature Control with
which case the users will be required to correct the NEMA 4X Watertight, Corrosion-resistant,
interference at their own expense. Enclosure, Dimensions, in./(mm)
Canadian Compliance Statement
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.
2 A419 Series Electronic Temperature Controls with Display and NEMA 1 or NEMA 4X Watertight Enclosures
Product/Technical Bulletin
Liquid Crystal Display
During normal operation, the LCD displays the
temperature at the sensor, the units of temperature
(°F or °C), and an icon indicating if the control is set for
Heating ( ) or Cooling ( ) mode. The LCD also
displays BIN if the Temperature Offset function is
activated. See Figure 5.
During control set up or adjustment, the LCD displays
the control functions and their values (settings). After
30 seconds of inactivity, the display returns to the
sensed-temperature display. See the Adjustments
section to adjust the control setting.
Output Relay Status Indicator LED
A green LED on the control’s front panel illuminates
when the SPDT output relay is energized and the
Normally Open (N.O.) contacts are closed.
See Figure 5.
A419 Control Definitions
Figure 4: A419 Temperature Control with NEMA 4X Cut-in is the temperature at which the N.O. contacts
Enclosure and A99 Temperature Sensor on the SPDT output relay close.
Cutout is the temperature at which the N.O contacts
Operation Overview on the SPDT output relay open.
The A419 control’s front-panel, LCD, LED, and the
A419 control functions are described below. See the A419 Functions Set at the Front-Panel
Adjustments section for instructions on setting up and
Setpoint (SP) establishes the temperature value that
adjusting the A419 control.
energizes or de-energizes the output relay, depending on
A419 Control Front-Panel the user selected mode of operation. The control may be
set either to cut in or to cut out at Setpoint. See the
The front panel of the A419 control has a three-button
Cooling/Heating and Setpoint Modes. The Setpoint range
touchpad and LCD for adjusting control function
is -30 to 212°F (-34 to 100°C).
values, and an LED indicator that displays the On/Off
status of the SPDT output relay. See Figure 5. If Setpoint mode is Cut-in, Setpoint is the temperature
Temperature value that closes the N.O. contacts. If Setpoint mode is
Offset Indicator Cutout, Setpoint is the temperature value that opens
the N.O. contacts. See Figure 7 and Figure 8.
Temperature
BIN Units Indicator Differential (dIF) establishes the difference in
F Operating Mode
temperature (in F° or C°) between the cut-in and
Indicator cutout values. The differential is set relative to Setpoint
and may be set from 1 to 30F° or C°. See Figure 7 and
Liquid Crystal Figure 8.
Display
MENU Anti-Short Cycle Delay (ASd) establishes the
MENU Button minimum time that the N.O. contacts remains open (after
reaching cutout) before closing again. The delay overrides
DOWN Arrow
Button any Load Demand and does not allow the N.O. contacts
to close until the set time-delay value has elapsed. See
UP Arrow Figure 6. When the delay is activated, the LCD
Button alternately flashes the sensor temperature and ASd. The
Output Relay delay may be set for 0 to 12 minutes in 1-minute
Status Indicator increments.
LED
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 3
For example, if the anti-short cycle delay is set for This function enables the control to alternate between
7 minutes, the A419 control will not restart the two temperature setpoints based on the position of the
equipment for 7 minutes after the equipment has cut binary input switch. The difference between the
out, even if the cut-in temperature value is reached primary and secondary setpoints (in F° or C°) is set in
during the delay. If the temperature reaches the cut-in the Temperature Offset function (OFS) using the
value during the delay period, the display flashes touchpad. See Setting Other Functions.
between the sensed temperature and ASd, indicating
Table 1 shows an example of Temperature Offset.
that the next On-cycle is being delayed. After the set
delay time has elapsed, the A419 control returns to
normal operation, restarts the equipment (if cut-in has Table 1: Temperature Offset Example
been reached), ASd stops flashing, and the LCD Mode of Temperature Secondary
Setpoint
reverts to the normal operating display. Operation Offset Value Setpoint*
Cooling 70° 8° 78°
Note: Any interruption in supply power to the
A419 control activates the anti-short cycle delay. Heating 70° 8° 62°
Time Load Demand * Setpoint when circuit between binary input terminals
Overridden (BIN and COM) is closed
On
Off Load Demand
On When the circuit is closed between the binary input
Off Output Status
Anti-short (BIN) common (COM) terminals, the offset function is
Cycle Delay enabled and the A419 control cycles on the secondary
setpoints. BIN is displayed on the LCD above the °F or
Figure 6: Anti-short Cycle Delay °C symbol when the offset is enabled. See Figure 5.
Sensor Failure Operation (SF) establishes how the
A419 control operates the equipment in the event of a A419 Control Functions Set by Jumper Position
sensor or sensor-wiring failure. The A419 control may For instructions on positioning jumpers, see
be set to run the equipment continuously or to shut it Positioning the Jumpers in the Adjustments section.
down if the sensor or sensor wire fails. When a failure See Figure 12 and Figure 13.
is detected the LCD flashes SF alternately with OP if Touchpad Lock: The jumper at P5 establishes
the sensor circuit is open, or SF and SH if the sensor whether the touchpad is locked or unlocked. Locking
circuit is shorted. The control implements a 1-minute the touchpad deters accidental or unauthorized
delay before initiating a failure response to allow for changes to all of the function parameters.
verification of the failure condition and to avoid
nuisance failure indications. Heating/Cooling Mode is established by positioning
the jumper on the top two pins of the P4 jumper. See
Temperature Units establishes the units of Figure 13.
temperature (F° or C°) displayed on the LCD.
Setpoint Mode: Removing or installing the lower
Temperature Offset (OFS) establishes the value of jumper at P4 establishes whether Setpoint is the cut-in
setpoint-shift (in F° or C°) applied to Setpoint (and temperature or cutout temperature. See Figure 13.
Differential) when a (user-installed) circuit is closed
between the binary input (BIN) and common (COM) Cooling/Heating and Setpoint Modes
terminals. The offset value may be set from 0 to 50F°
or C°. The A419 control may be in four operating modes:
Cooling/Cut-in, Cooling/Cutout, Heating/Cut-in, and
The Temperature Offset function is used to reset the Heating/Cutout. Position the jumpers located on the
Heating Setpoint to a lower temperature (secondary) circuit board under the A419 control cover to set the
setpoint or reset the Cooling Setpoint to a higher desired mode of operation. See Positioning the
temperature (secondary) setpoint by the temperature Jumpers.
value set in Temperature Offset.
In Cooling/Cut-in mode the differential is below
The BIN and COM terminals may be connected to a Setpoint. The output relay energizes and the LED
(user-supplied) external switching device, such as a illuminates when the temperature rises to Setpoint.
time clock, that has a set of Single-Pole, Single-Throw When the temperature drops to Setpoint minus the
(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.
4 A419 Series Electronic Temperature Controls with Display and NEMA 1 or NEMA 4X Watertight Enclosures
Product/Technical Bulletin
In Cooling/Cutout mode the differential is above Mounting
Setpoint. The output relay energizes and LED
An A419 control has either a standard high-impact
illuminates when the temperature rises to Setpoint plus
plastic NEMA 1 or a NEMA 4X corrosion-resistant,
the differential value. When the temperature drops to
watertight enclosure.
Setpoint, the relay and LED de-energize.
Temperature The A419 control is not position sensitive but should
(+) Cooling/Cut-out be mounted for convenient wiring and adjustment.
Cut-in Note: When mounting the control to rigid conduit,
(On) attach the hub to the conduit before securing the hub
Differential to the control enclosure.
Cut-out
(Off) The mounting hole pattern of the NEMA 1 enclosure is
Cooling/Cut-in
Setpoint identical to that of the System 350 controls, and most
Cut-in models of the A19 control. The NEMA 1 enclosure
(On) may also be mounted on 35 mm DIN rail. See Figure 1
Differential and Figure 2.
The NEMA 4X models may be mounted to flat vertical
surfaces using the four screw holes at the enclosure
(-) Cut-out corners. See Figure 3 and Figure 4. To maintain the
(Off) watertight and corrosion resistant integrity of the
NEMA 4X enclosure, use a conduit fitting rated for the
Figure 7: Cooling Modes
environment in which the control is installed.
When the Heating/Cut-in mode is selected, the
An additional (low-voltage) two-wire cable is required
differential is above Setpoint. The output relay
to operate the temperature offset function. On
energizes and LED indicator illuminates when the
NEMA 4X enclosures you must install a suitable
temperature drops to Setpoint. When the temperature
liquid-tight fitting in an available knockout to pass the
rises to Setpoint plus the differential value, the output
two-wire cable through the enclosure wall.
relay and LED de-energize.
When Heating/Cutout mode is selected, the IMPORTANT: The short-lead A99 sensor,
differential is below Setpoint. The output relay included with A419 NEMA 4X model controls, must
energizes and LED indicator illuminates when the be mounted on the bottom of the control in the
temperature drops to Setpoint minus the differential bracket molded on the NEMA 4X housing. Mounting
value. When the temperature rises to Setpoint, the the sensor on top of the control may reduce the
output relay and LED indicator de-energize. accuracy of the displayed temperature. See Figure 3
Temperature
and Figure 4 for proper sensor position.
(+) 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 5
Wiring
(Optional) A419GBF-1
! WARNING: Risk of Electrical Shock.
Binary Input
Switch
(+) BIN
A419GEF-1
To avoid the risk of electrical shock, disconnect all (–) COM
power sources to the control before wiring any (+) SEN
connections. More than one disconnect may be TB3
required to completely de-energize the control and
Cable
equipment. Shield
(if used) TB1
TB2
A99
IMPORTANT: All wiring must conform to local, Sensor T1 NC
C
T2 NO
national, and regional regulations. Use copper
conductors only for all wire connections. Do not
exceed the electrical ratings for the A419 control or 24 VAC
Class 2 24 VAC
the equipment it is wired to. Transformer Load
See Figure 9, Figure 10, and Figure 11 for typical Figure 9: Wiring the 24 VAC A419 Control
examples of wiring an A419 control to the controlled
equipment.
(Optional)
A419ABC-1
Use wire no larger than 12 AWG when connecting to Binary Input
A419AEC-1
the two lower terminal blocks (TB1 and TB2). Switch
(+) BIN
(–) COM
Note: Terminal block TB2 is an isolated SPDT (+) SEN
switch (dry contacts). The TB2 terminals have no TB3
internal electrical connection to the A419 control.
Use wire no larger than 16 AWG when connecting to Cable
Shield
the upper sensor terminal block (TB3). (if used) TB1
TB2
Wire insulation rating must be 90°C, minimum. A99
AC COM
NC
Sensor
240 120
C
NO
A99 temperature sensors are not polarity sensitive.
Wire the leads to (+) SEN and (-) COM on the sensor
terminal block (TB3). See Figure 9, Figure 10, and 120 VAC
Figure 11. 120 VAC
Neutral
Load
Keep the leads between the control and sensor as
short as possible/practical in your application. The Figure 10: Wiring the 120 VAC A419 Control
additional resistance in long sensor leads creates error
between the actual temperature and the displayed (Optional)
temperature. See Table 1 when extending sensor A419ABC-1
Binary Input
Switch A419AEC-1
leads. (+) BIN
(–) COM
Temperature sensor signals may be affected by
(+) SEN
electrical interference. When extending sensor cable TB3
beyond 50 ft (15.2 m) use a twisted-pair, shielded
cable to reduce electrical interference. Cable
Shield
If the Temperature Offset function is used, wire a (if used) TB1
switch (such as a switching time clock) between the A99
TB2
binary input terminal (BIN) and the common terminal Sensor
AC COM
NC
(COM). See Figure 9, Figure 10, and Figure 11 for 240 120
C
NO
terminal strip location.
240 L1
VAC L2 240 VAC
Load
Figure 11: Wiring the 240 VAC A419 Control
6 A419 Series Electronic Temperature Controls with Display and NEMA 1 or NEMA 4X Watertight Enclosures
Product/Technical Bulletin
Adjustments
This section provides instructions for setting up and
adjusting the A419 controls using the jumpers and
touchpad.
=
Jumper
Installed
(Jumper Positioned on Both Pins)
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. Pins
=
The top set of pins at P4, labeled JUMP1, is used to Removed
(Jumper Positioned on One Pin)
set the control for Heating or Cooling mode. The
bottom set of pins, labeled JUMP2, is used to establish
Figure 12: Positioning the Jumpers
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 Touchpad Touchpad Heating Mode
Removed position, place the jumper on only one pin. Locked Unlocked Cut-in at Setpoint
(Save the jumper in case it is required in the future.)
See Figure 12.
Position the jumpers as follows. See Figure 12, Figure
Cooling Mode
13, and Table 2. JUMP1
Cut-in at Setpoint
JUMP2
1. Verify that all power sources to the A419 control P5 P4
have been disconnected.
2. Remove the control’s cover by loosening the four Heating Mode
(Standard)
captive cover screws. Cut-out at Setpoint
3. Position the jumpers to set Cooling/Heating,
Setpoint, and Touchpad Lock functions.
Cooling Mode
4. Replace the cover and fasten in place with the (Standard)
four screws. Cut-out at Setpoint
5. Restore power to the control. Figure 13: Jumper Positions and Control Settings
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.
Table 2: Jumper Designations, Jumper Positions and Control Settings
Jumper Pins Designation Jumper Factory Default Setting
Function Setting
on Control Position* (and Jumper Position)
Operating Mode JUMP1 Cooling Removed Cooling
Cooling/Heating (Top Pair of Pins on Block P4) Heating Installed (Removed position)
JUMP2 At Cut-in Removed Cut-in
Setpoint
(Bottom Pair of Pins on Block P4) At Cut-out Installed (Removed Position)
Locked Removed Unlocked
Touchpad Lock P5-Touchpad Unlock
Unlocked Installed (Installed Position)
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 7
Changing Temperature Units Table 3: Function Ranges and Settings
The A419 control is set at the factory to display in Factory
Fahrenheit temperature units. Function Range
Setting
To convert to Celsius units, -30 to 212°F
SP: Setpoint (-34 to 100°C)
30
press the Up and Down buttons
simultaneously. Press them dIF: Differential 1 to 30° (F or C) 5
again to return to Fahrenheit
ASd: Anti-short 0 to 12 minutes 1
units. Cycle Delay
Notes: Make sure the Touchpad Lock jumper is in the OFS: Temperature
unlocked (installed) position before adjusting the 0 to 50° (F or C) 0
Offset
control. See Figure 13.
0 = output
Verify that the A419 control is displaying the desired SF:Sensor Failure de-energized
1
temperature units (F° or C°) before establishing the Operation 1 = output
setpoint value. energized
Operation at Extremes: If the combination of setpoint
Setting the Setpoint plus or minus the differential falls outside the
temperature range (-30 to 212°F [-34° to 100°C]), the
To view and adjust the temperature setpoint, follow
A419 control operates as follows:
these steps and see Table 3:
Cooling/Cut-in: If the control is operating in
1. Press and hold the MENU button
Cooling/Cut-in mode and setpoint minus differential is
until the display changes to flashing
less than -30°F, the control switches on at setpoint
SP. This will take about 2 seconds.
and off when the temperature drops below -30°F
2. Press the MENU button again. (-34°C).
The current setpoint is displayed. Heating/Cut-in: If the control is operating in
Heating/Cut-in mode and setpoint plus differential is
greater than 212°F (100°C), the control switches on at
3. Press the Up or Down button to setpoint and off when the temperature exceeds 212°F
adjust the setpoint temperature. (100°C).
Cooling/Cutout: If the control is operating in
4. Press the MENU button to save. Cooling/Cutout mode and setpoint plus differential is
The display then returns to the sensor greater than 212°F (100°C), the control switches on
temperature. when the temperature exceeds 212°F (100°C) and off
at setpoint.
Notes: If no entries are made for 30 seconds while
Heating/Cutout: If the control is operating in
programming is in progress, the control reverts to the
Heating/Cutout mode and setpoint minus differential is
normal temperature display.
less than -30°F (-34°C), the control switches on when
If the MENU button is not pressed after changing the the temperature drops below -30°F (-34°C) and off at
setpoint value, the new value is not saved and the setpoint.
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.
8 A419 Series Electronic Temperature Controls with Display and NEMA 1 or NEMA 4X Watertight Enclosures
Product/Technical Bulletin
Setting Other Functions Checkout
To set the Differential (dIF), Anti-short Cycle Delay Before applying power, make sure installation and
(ASd), Temperature Offset (OFS), or Sensor Failure wiring connections are according to job specifications.
(SF) operation, use the method illustrated and outlined After necessary adjustments and electrical
below. connections have been made, put the system in
Figure 14 illustrates the order of functions shown using operation and observe the control for at least three
the Up or Down button. The Up button accesses complete operating cycles before leaving the
functions in the clockwise direction; the Down button installation.
accesses functions in the counterclockwise direction.
See Table 3 for function ranges and factory settings. Troubleshooting
If the control system does not function properly, verify
Up d I F that the unit is wired, configured, and set properly. If
Button the problem persists, use the following procedures to
determine the cause of the problem:
S P A S d
1. Check for proper supply voltage to the A419
Down control.
Button
a. Remove the cover by loosening the four
OF S captive cover screws.
S F
Figure 14: Order of the Functions ! WARNING: Risk of Electrical Shock.
High voltages may be present at electrical terminals
1. Press and hold the MENU button
and other exposed internal metal surfaces. Avoid
until the display changes to
contact with all metal surfaces on control when cover
flashing SP. This will take about 2
is removed.
seconds.
2. Press the Up or Down button b. Use a reliable AC voltmeter to check the
repeatedly until the desired voltage between the COM and 120V or 240V
function is displayed. terminals on line voltage models and the two
See Table 3. 24V terminals on low-voltage models. See
Figure 9, Figure 10, and Figure 11.
3. Press the MENU button to display
the function’s current value. c. The voltage must be between: 20 and 30 VAC
for 24 volt applications, 102 and 132 VAC for
120 volt applications, 177 and 264 VAC for
4. Press the Up or Down button 208/240 volt applications
until the desired value is
displayed. Notes: If the voltage reading is within the
required range, proceed to Step 2.
5. Press the MENU button to save
the new value. The display then If the voltage reading is not within the required
returns to the sensor temperature. range, check the power source and input
power wires for problems.
Notes: If no entries are made for 30 seconds while
programming is in progress, the control reverts to the
normal temperature display.
If the MENU button is not pressed after setting a new
value, the new value is not saved and the A419 control
reverts to the previously saved value for that function.
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 9
2. Check for proper sensor operation. g. Press and hold the MENU button until Setpoint
appears (occurs in about 2 seconds).
Disconnect all power sources to control.
h. Use the Up and Down buttons to change the
a. Take a temperature reading at the sensor
Setpoint temperature above and below the
location, using an accurate thermometer.
current sensor temperature until the output
b. Disconnect the sensor from the control. relay energizes and de-energizes as shown in
Table 4.
c. Use a reliable ohmmeter, to measure the
resistance across the two sensor leads while If the anti-short cycle delay has a time greater
the sensor is at the temperature taken in than 0 minutes, the relay will not energize until
Step b. the timed delay has elapsed.
d. See Figure 15 to verify that the measured i. If the output relay does not perform as
temperature and resistance conform to indicated in Table 4, replace the A419 control.
established temperature and resistance
j. If proper operation of the A419 control is
values.
verified, reconnect the load and consult the
e. If the measured values conform to the values equipment manufacturer’s instructions for
in Figure 15, proceed to Step 3. troubleshooting the controlled equipment.
f. If the sensor’s measured resistance value is
Table 4: A419 Output Relay Operation
substantially different from the expected value
for that temperature, check the sensor wiring. Output
Output Relay
If sensor wiring is okay, replace the sensor. Setpoint Operating Relay
De-energized
Mode Mode Energized
Temperature (°F) Temperature (°C) at…
at…
260 Setpoint
240 120
220
Cooling plus Setpoint
100 differential
200
180 80
Cutout
160 Setpoint
140 60 Heating minus Setpoint
120 differential
100 40
80 Setpoint
60 20
40 Cooling Setpoint minus
0 differential
20 Cut-in
0 -20
-20 Setpoint plus
Heating Setpoint
-40 -40 differential
500 700 900 1100 1300 1500 1700 1900 2100 Note: When the relay is energized, the N.O. contacts
Resistance in Ohms are closed and the LED is illuminated.
Figure 15: Nominal Temperature vs.
Sensor Resistance
3. Check the A419 for proper operation.
a. Perform Troubleshooting Steps 1 and 2 before
performing this step.
b. Disconnect the load from the output relay
terminals.
c. Ensure that the Touchpad Lock jumper is
installed, so that the touchpad is unlocked.
d. Reconnect the sensor leads and supply power
to the control.
e. Replace the cover.
f. Check the control settings for proper values.
10 A419 Series Electronic Temperature Controls with Display and NEMA 1 or NEMA 4X Watertight Enclosures
Product/Technical Bulletin
Fault Codes
A419 controls are programmed to display certain fault
codes on the LCD as described in Table 5.
Table 5: Fault Codes Defined
Fault Code Definition System Status Solution
Open temperature Output functions according to See Troubleshooting section.
SF flashing
sensor or sensor the selected sensor failure
alternately with OP Cycle power to reset the control.
wiring mode (SF setting)
Shorted temperature Output functions according to See Troubleshooting section.
SF flashing
sensor or sensor the selected sensor failure
alternately with SH Cycle power to reset the control.
wiring mode (SF setting)
Reset the control by pressing the Menu
EE Program failure Output is off button. If problems persist, replace the
control.
Repairs and Replacement Ordering Information
Do not attempt to repair or recalibrate the See Table 6 to order controls and accessories.
A419 Control. In case of a defective or improperly
functioning control, contact your nearest Authorized
Johnson Controls/PENN® Distributor or Sales
Representative.
When contacting your Johnson Controls/PENN
distributor, have the model number of the control
available. This number can be found on the label
inside the cover of the control.
Table 6: Ordering Information
Product Code Item Description
Number
A419ABC-1C Line Voltage, NEMA 1 Enclosure Supply Voltage: 120 or 240 VAC
A419 Series Electronic Temperature Control
Range: -30 to 212°F (-34 to 100°C)
with Display, A99 Sensor Included
Differential: 1 to 30F° (1 to 30C°)
A419AEC-1C Line Voltage, NEMA 4X Enclosure
A419 Series Electronic Temperature Control Sensor Lead Length: NEMA 1 Models 6-1/2 ft (2 m),
with Display, A99 Sensor Included NEMA 4X Models 9 in (0.25 m)
A419GBF-1C 24 VAC, NEMA 1 Enclosure Supply Voltage: 24 VAC, Class 2
A419 Series Electronic Temperature Control
Range: -30 to 212°F (-34 to 100°C)
with Display, A99 Sensor Included
Differential: 1 to 30F° (1 to 30C°)
A419GEF-1C 24 VAC, NEMA 4X Enclosure
A419 Series Electronic Temperature Control Sensor Lead Length: NEMA 1 Models 6-1/2 ft (2 m),
with Display, A99 Sensor Included NEMA 4X Models 9 in (0.25 m)
A99BB-200C Replacement Temperature Sensors PTC Sensor with 6-1/2 ft (2 m) Leads
A99BA-200C PTC Sensor with 6-1/2 ft (2 m) Shielded Leads
A99BB-25C PTC Sensor with 9 in (0.25 m)
BKT287-1R Accessory Mounting Hardware 12 in. (305 mm) long DIN Rail
BKT287-2R 36 in. (914 mm) long DIN Rail
PLT344-1R Two End Clamps for DIN Rail Mounting
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 11
Technical Specifications
Product A419 Series Electronic Temperature Controls with NEMA 1 General Purpose or NEMA 4X
Watertight, Corrosion-Resistant Enclosures
Setpoint Range -30 to 212°F (-34 to 100°C)
Differential Range 1 to 30F° (1 to 30C°)
Supply Voltage 24 VAC, 60 Hz, Class 2: A419GBF-1 (NEMA 1 Enclosure Model)
A419GEF-1 (NEMA 4X Watertight Enclosure Model)
120 or 240 VAC, 60 Hz: A419ABC-1 (NEMA 1 Enclosure Model)
A419AEC-1 (NEMA 4X Watertight Enclosure Model)
Power Consumption 1.8 VA Maximum
Output Relay Contacts 24 VAC Models: A419GBF-1 (NEMA 1 Enclosure)
Electrical Ratings A419GEF-1 (NEMA 4X Watertight Enclosure)
100 VA, 30 VAC maximum, Class 2
120/240 VAC Models: A419ABC-1 (NEMA 1 Enclosure)
A419AEC-1 (NEMA 4X Watertight Enclosure)
Applied Voltage: 120 VAC 208 VAC 240 VAC
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