Johnson Controls A419 Series Installation Instructions Manual

Installation Instructions
Issue Date April 8, 2008

®

A419 Series Electronic Temperature Controls

with NEMA 1 or NEMA 4X Watertight Enclosures

Application

IMPORTANT: The A419 Series Electronic

Temperature Controls are intended to control
equipment under normal operating conditions.
Where failure or malfunction of an A419 control
could lead to an abnormal operating condition that
could cause personal injury or damage to the
equipment or other property, other devices (limit or
safety controls) or systems (alarm or supervisory)
intended to warn of or protect against failure or
malfunction of the A419 control must be
incorporated into and maintained as part of the
control system.

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
provide reasonable protection against harmful
interference when this equipment is operated in a
commercial environment. This equipment generates,
uses, and can radiate radio frequency energy and, if
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 is likely to cause harmful
interference, in which case the user will be required to
correct the interference at his or her own expense.

The A419 Electronic Temperature Control is a
single-stage, electronic temperature control with a
Single-Pole, Double-Throw (SPDT) output relay. The
control features a lockable, three-button touchpad for
setup and adjustment and a Liquid Crystal Display
(LCD) which displays the sensed temperature and
other control functions. A front panel Light-Emitting
Diode (LED) indicates the output relay status. The
control has a setpoint range of -30 to 212°F
(-34 to 100°C) and is available in 24 VAC or
120/240 VAC models. See the Technical
Specifications section.

The A419 control has heating and cooling modes with
adjustable setpoint and differential, an adjustable
anti-short cycle delay, and a temperature offset
(setback) function. The control provides remote
sensing capability, and electronic accuracy in a
Type NEMA 1 high-impact plastic enclosure suitable
for surface or DIN rail mounting or a surface mount
Type NEMA 4X watertight and corrosion resistant
enclosure. The temperature sensor supplied with the
control is interchangable with compatible
Johnson Controls/PENN® A99 temperature sensors.

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.

FCC Compliance

This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) this device may not cause harmful interference,
and (2) this device must accept any interference that
may cause undesired operation.

Installation

Refer to the following guidelines, procedures and
illustrations when installing an A419 control.

Parts Included

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.

Dimensions

7/16

(11)

2

2-3/8

(61)

7/8

(22)

MENU

2-3/8
(61)

(1/2 in. Trade Size)

7/8

(22)

Conduit Hole

5

(127)

4

(102)

2-3/8

(61)

9/64
(3.7)

1/2

(13)

2-15/16

(75)

1-9/16
(40)

(6)

1/4

DIN
Rail

Sensor

(50)

Figure 1: Dimensions for A419 Temperature

Controls with NEMA 1 Enclosures, in./(mm)

© 2008 Johnson Controls, Inc. 1
Part No. 24-7664-1539, Rev. C

2-1/4

56

A419

MENU

2-13/16

71

1-3/4

44

6-5/8

168

6-1/8

155

Positi on t he A99 sensor
in bracket at bottom of
A419 NEMA 4X enclos ure.

2-13/16

71

1-1/16

27

Figure 2: Dimensions for A419 Temperature

Controls with NEMA 4X Enclosures, in./(mm)

Mounting

An A419 control has either a standard high-impact
plastic NEMA 1 or a NEMA 4X watertight enclosure.
The A419 control is not position sensitive but should
be mounted for convenient wiring and adjustment. The
NEMA 4X models may be mounted to flat vertical
surfaces using the four screw holes at the enclosure
corners. See

Note: When mounting the control to rigid conduit,
attach the hub to the conduit before securing the hub
to the control enclosure. For a NEMA 4X model, use a
watertight fitting rated for the ambient environment.

On NEMA 4X models select the knockout to be
removed. Place a screwdriver blade on the knockout
near the edge. Apply a sharp blow to the screwdriver
handle to loosen the knockout. Be careful not to
damage the control’s interior components.

An additional low-voltage, two-wire cable is required to
operate the A419 control’s temperature offset function.
On NEMA 4X enclosures you must install a suitable
water-tight fitting in an available knockout to pass the
two-wire cable through the enclosure wall.

IMPORTANT: The short-lead A99 sensor,
included with A419 NEMA 4X controls, must be
mounted on the bottom of the control in the bracket
on the NEMA 4X housing. Mounting the sensor on
top of the control may reduce the accuracy of the
displayed temperature. See Figure 2.

Figure 2.

Wiring

!

WARNING: Risk of Electrical Shock.

To avoid the risk of electrical shock, disconnect all
power sources to the control before wiring any
connections. More than one disconnect may be
required to completely de-energized the control and
equipment.

IMPORTANT: All wiring must conform to local,
national, and regional regulations. Use copper
conductors only for all wire connections. Do not
exceed the electrical ratings for the A419 control or
the equipment it is wired to.

Observe the following guidelines and refer to Figure 3

Table 1 when wiring the A419 control to your

and
equipment.

• Use wire no larger than 12 AWG when connecting
to the two lower terminal blocks (TB1 and TB2).

• Use wire no larger than 16 AWG when connecting
to the upper sensor terminal block (TB3).

• Wire insulation rating must be 90°C, minimum.

• A99 temperature sensors are not polarity

sensitive. Wire the leads to (+) SEN and (-) COM
on the sensor terminal block (TB3). See

• Keep the leads between the control and sensor as
short as possible/practical in your application. The
additional resistance in long sensor leads creates
error between the actual temperature and the
displayed temperature. Refer to

Table 1 when

extending sensor leads.

• Temperature sensor signals may be affected by
electrical interference. When extending sensor
cable beyond 50 ft (15.2 m) use a twisted-pair,
shielded cable to reduce electrical interference.

Table 1: Maximum Recommended Sensor Cable
Lengths and Wire Sizes

Wire

Gauge

16 AWG
18 AWG
20 AWG
22 AWG

* At the listed maximum cable lengths there is less than

1F° (0.6C°) error in the actual temperature vs.
displayed temperature.

Maximum Sensor Cable Length*

feet (meters)

500 (150)
300 (100)

200 (60)
125 (40)

Figure 3.

2 A419 Electronic Temperature Control with NEMA 1 and NEMA 4X Watertight Enclosures Installation Instructions

(Optional)

Cable

Shield

(if used)

Sensor

24 VAC
Class 2

Transformer

Binary

Input

Switch

A99

24 VAC Application

A419GBF-1
A419GEF-1

(+)

BIN

(–)

COM

(+)

TB1

T1

SEN

TB2

T2

TB3

C

NC

24 VAC

Load

NO

(Optional)

Cable

Shield

(if used)

Sensor

120 VAC

Neutral

Binary

Input

Switch

A99

120 VAC Application 240 VAC Application

A419ABC-1

A419AEC-1

(+)

BIN

(–)

COM

(+)

SEN

TB3

TB1

TB2

NCCNO

120

240

AC COM

120 VAC

Load

(Optional)

Cable
Shield

(if used)

VAC

Binary

Input

Switch

A99

Sensor

240

L1
L2

TB3

TB1

240

(+)
(–)

(+)

AC COM

A419ABC-1
A419AEC-1

BIN
COM

SEN

TB2

120

NCCNO

240 VAC

Load

Figure 3: Typical Wiring for the A419 Series Temperature Controls: 24, 120, and 240 VAC Applications

Setup and Adjustments

!

WARNING: Risk of Electrical Shock.

To avoid the risk of electrical shock disconnect all
power sources to the control before opening control
cover and repositioning jumpers. More than one
disconnect may be required to completely
de-energized the control and equipment.

IMPORTANT: To ensure that the output relay
operates as intended, verify that all three of the
jumpers are positioned properly for the application
before powering the A419 control.

Jumper

(Jumper Positioned on Both Pins)

Pins

(Jumper Positioned on One Pin)

Figure 4: Positioning the Jumpers

=

Installed

=

Removed

IMPORTANT: The touchpad cannot be
unlocked without a jumper installed across the P5
jumper pins. Do not discard jumpers in case they are
required in the future. See Figure 4 and Figure 5.

Positioning the Jumpers

The P5 jumper position determines if the touchpad is
locked or unlocked.

The P4 jumper pin block has two pairs of jumper pins.
The top pair of pins (JUMP1), determines if the control
is set for Heating or Cooling mode. The bottom pair of
pins, (JUMP2) establishes whether Setpoint is at cut-in
or at cutout. See

Figure 4 and Figure 5.

To position a jumper in the Installed position, place
the jumper on both pins, which closes the circuit
between the pins. To position a jumper in the
Removed position, place the jumper on one pin only.

Figure 4.

See

A419 Electronic Temperature Control with NEMA 1 and NEMA 4X Watertight Enclosures Installation Instructions 3

Touchpad

Locked

P5

Touchpad

Unlocked

JUMP1

JUMP2

Cut-in at Setpoint

Cut-in at Setpoint

P4

Cut-out at Setpoint

Cut-out at Setpoint

Heating Mode

Cooling Mode

Heating Mode

(Standard)

Cooling Mode

(Standard)

Figure 5: Jumper Positions and Control Settings

Table 2: Jumper Designations, Jumper Positions and Control Settings

Function

Cooling/Heating
Operating Mode

Setpoint at

Cut-in or Cutout

Touchpad Lock P5

JUMP1

(Top Pair of Pins on Block P4)

JUMP2
(Bottom Pair of Pins on Block P4)

Jumper Pins Designation

on Control

Setting

Cooling Mode Removed
Heating Mode Installed

Setpoint
at Cut-in

Setpoint
at Cutout

Locked Removed
Unlocked Installed

Removed

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

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).

Figure 3. Offset range is 0 to 50F° or C° (in 1-

See
degree increments). A typical application might use a
switching time clock to invoke night-set bac k
temperature settings.

IMPORTANT: Make sure the Touchpad Lock
jumper is installed (unlocked) before attempting to
adjust the A419 control functions. See Figure 5.

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

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.

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 implement s a

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.

1-minute delay, which allows verification of failure
condition and avoids nuisance failure indications.

Note: If no setup entry is made for 30 seconds, the
control reverts to the (normal) temperature display.

Jumper

Position

Factory Default Setting

(and Jumper Position)

Cooling Mode
(Jumper Removed)

Cut-in
(Jumper Removed)

Unlocked
(Jumper Installed)

4 A419 Electronic Temperature Control with NEMA 1 and NEMA 4X Watertight Enclosures Installation Instructions

IMPORTANT: If MENU is not pressed after
changing the setpoint value, the control reverts to
the previously programmed setpoint value.

Temperature

Offset Indicator

Temperature

BIN

F

MENU

Units Indi cator

Operating Mode

Indicator

Liquid Crystal

Display

MENU

Button

DOWN

Arrow

Button

UP

Arrow

Button

Output Relay

Status Indicator

LED

Figure 6: Liquid Crystal Display, Touchpad, and

LED Indicator

3. Press MENU to display the function’s current
value.

4. Press Up or Down (arrows) until the desired value
is displayed.

5. Press MENU to save the new value. The display
returns to the sensor temperature.

IMPORTANT: If MENU is not pressed after
changing the settings, the new settings are not
saved and the control reverts to the previously
programmed setting values.

Note:

If no setup entry is made for 30 seconds, the

control reverts to the (normal) temperature display.

Note:

Any saved A419 control settings are
non-volatile and remain in the control’s memory
during power interruptions.

IMPORTANT: Do not set Setpoint and
Differential values which (when totaled) fall out of
A419 control’s Setpoint range (-30 to 212°F
[-34 to 100°C]). The control will not function properly
if Cut-in or Cutout values are outside of the control’s
Setpoint range.

Setting the Other A419 Control Functions

To set the Differential, Anti-short Cycle Delay,
Temperature Offset, or Sensor Failure operation, use
the following method.

1. Press and hold MENU until the display changes to
flashing SP. (This takes about 2 seconds.)

Checkout

Before applying power, make sure installation and wire
connections are correct for your application. Then
power, operate and observe the system and A419
control for at least three complete operating cycles
before leaving the installation.

2. Press Up or Down (arrows) repeatedly until the
desired function is displayed. (See

Table 3.)

Table 3: Display Symbols, Control Function, Ranges, Units, Values, and Factory Settings

Display
Symbol

SP
dIF
ASd
OFS

SF
F or C

BIN

or

* The sum of the Setpoint and Differential values must be within the Setpoint range, or the control may not function

properly.

Control Function Range – Units/Value

Setpoint* -30 to 212 – °F (-34 to 100 – °C) 30
Differential* 1 to 30 – (F° or C° in 1-degree increments) 5
Anti-short Cycle Delay 0 to 12 – (in 1-minute increments) 1
Temperature Offset 0 to 50 (F° or C° in 1-degree increments) 0

Sensor Failure Operation
Temperature Units (No range) – F° or C° F°

Temperature Offset Indicator

Cooling or Heating Mode of
Operation

(No range)— 0 = output relay de-energized
1 = output relay energized

(No range) – BIN is displayed and the A419 control
operates on the secondary setpoints when the circuit
between the BIN and COM terminals is closed.

(No range) –
Jump1 jumper is removed.
when the Jump1 jumper is installed.

(Cooling Mode) is displayed when the

(Heating Mode) is displayed

Factory Set
Value

1

N/A

Cooling Mode

A419 Electronic Temperature Control with NEMA 1 and NEMA 4X Watertight Enclosures Installation Instructions 5

Troubleshooting

!

WARNING: Risk of Electrical Shock.

Hazardous voltages may be present at electrical
terminals and other exposed internal metal surfaces.
Do not touch any metal parts within the control when
cover is removed. Any contact with metal parts,
including with metal or conductive tools, may result
in serious injury or death.

If the control system does not function properly, verify
that the control is wired, and set up properly. If the
problem persists, use the following procedures to
determine the cause of the problem:

IMPORTANT: Follow these troubleshooting
procedures in the order presented. Do not skip any
of the steps in the procedures.

1. Check for proper voltage to the A419 control.
a. Remove the cover by loosening the four

captive cover screws.

b. Use a reliable AC voltmeter to check the

voltage between the COM and 120V or 240V
terminals on-line voltage models and the two
24V terminals on low-voltage models. Refer to
Figure 3.

c. The voltage must be between 20 and 30 VAC

for 24 VAC applications, 102 and 132 VAC for
120 VAC applications, 177 and 264 VAC for
208/240 VAC applications.

d. If the voltage reading is not within the required

range, check the power source and input
power wires for problems.

2. Check for proper sensor operation.
a. Disconnect all power sources to control.
b. Using an accurate thermometer, take a

temperature reading at the sensor location,.
c. Disconnect the sensor from the control.
d. Using an ohmmeter, measure the resistance

across the two sensor leads while the sensor

is at the temperature taken in Step 2b.
e. Consult

temperature and resistance conform to

established temperature and resistance

values.
f. If the measured values conform to the values

in

Figure 7 to verify that the measured

Figure 7, proceed to Step 3.

g. If the sensor’s measured resistance value is

substantially different from the expected value
for that temperature, check the sensor wiring.
If sensor wiring is okay, replace the sensor.

T emperature (°F)

260
240
220
200
180
160
140
120
100

80
60
40
20

0

-20

-40
500 700 900 1100 1300 1500 1700 1900 2100

Resistance in Ohms

Temperature (°C)

Figure 7: Temperature vs. Sensor Resistance

3. Check the A419 for proper operation.
Note:

Perform Troubleshooting Steps 1 and 2 before

performing this step.

a. Disconnect the load from the output relay

terminals.

b. Ensure that the Touchpad Lock jumper is

installed, so that the touchpad is unlocked.

c. Reconnect the sensor leads and supply power

to the control.

d. Replace the cover.
e. Check the control settings for proper values.
f. Press and hold MENU until Setpoint appears

(This takes about 2 seconds).

g. Press the Up and Down (arrows) to change

the Setpoint temperature above and below the
sensor temperature until the relay energizes

Table 5.

Note:

and de-energizes as shown in
If the anti-short cycle delay has a set

delay-time value greater than 0 minutes when the
control is powered On, the relay does not energize
until the time delay has elapsed.

h. If the output relay does not perform as

indicated in

Table 5, replace the A419 control.

i. If proper operation of the A419 control is

verified, reconnect the load and consult the
equipment manufacturer’s instructions for
troubleshooting the controlled equipment.

120
100
80
60
40
20
0

-20

-40

6 A419 Electronic Temperature Control with NEMA 1 and NEMA 4X Watertight Enclosures Installation Instructions

Table 4: A419 Output Relay Operation in Different Operating modes

Setpoint
Mode

Cutout

Cut-in

Operating
Mode

Cooling Setpoint plus differential Setpoint
Heating Setpoint minus differential Setpoint
Cooling Setpoint Setpoint minus differential
Heating Setpoint Setpoint plus differential

Output Relay is Energized (closing
the NO and COM contacts) at…

Output Relay is De-energized (opening
the NO and COM contacts) at…

Fault Codes

If the LCD displays an alarm or fault code (SF or EE),
consult

Table 5 for explanation.

Table 5: Fault Codes Defined

Fault Code Definition System Status Solution

SF flashing alternately

with

OP

SF flashing alternately

SH

with

EE

Open temperature
sensor or sensor wiring

Shorted temperature
sensor or sensor wiring

Program failure Output is off

Output functions according to
the selected sensor failure mode
(SF setting)

Output functions according to
the selected sensor failure mode
(SF setting)

See Troubleshooting section.
Cycle power to reset the control.

See Troubleshooting section.
Cycle power to reset the control.

Reset the control by pressing
MENU. If problems persist, replace
the control.

Repairs and Replacement

Do not attempt to repair or recalibrate the
A419 temperature control. In case of a defective or
improperly functioning control, contact your nearest
Authorized Johnson Controls/PENN Distributor or
Sales Representative.

Ordering Information

Refer to Table 6 to order sensors, mounting hardware
and other accessories used to install A419 controls.
Contact your nearest Johnson Controls/PENN
Distributor or Sales Representative to order these
products.

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: A419 Controls Accessories

Product Code Number Description

A99BB-200
A99BA-200

BKT287-1R DIN Rail: 12 in. (305 mm) long
BKT287-2R DIN Rail: 36 in. (914 mm) long
PLT344-1R End Clamps for DIN Rail Mounting

CLK350-2C 7-Day Programmable Digital Clock for activating Binary Offset
WEL11A-601C Immersion Well for Mounting Sensor in Liquid Applications

Temperature Sensor: PTC Sensor with 6-1/2 ft (2 m) Non-shielded 2-Wire Lead
Temperature Sensor: PTC Sensor with 6-1/2 ft (2 m) Shielded 2-Wire Lead

A419 Electronic Temperature Control with NEMA 1 and NEMA 4X Watertight Enclosures Installation Instructions 7

Technical Specifications

Product A419 Series Electronic Temperature Controls with NEMA 1 General Purpose

Enclosures and NEMA 4X Watertight Enclosures

Setpoint Range

Differential Range

Supply Voltage 24 VAC, 60 Hz, Class 2: A419GBF-1 (NEMA 1 Enclosure Model)

Power Consumption

Output Relay Contacts

Electrical Ratings

Sensor Type

Control Ambient

Temperature

Ambient Humidity

Control Enclosure Material

Agency Listings

-30 to 212°F (-34 to 100°C)
1 to 30F° (1 to 30C°)

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)

1.8 VA Maximum
24 VAC models: A419GBF-1 (NEMA 1 Enclosure)

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

Horsepower N.O. (N.C.): 1 (0.25) hp 1 (0.33) hp 1 (0.5) hp
Full Load Amperes N.O. (N.C.): 16 (5.8) A 9.2 (4.0) A 8.0 (4.9) A
Locked Rotor Amperes N.O. (N.C.): 96 (34.8) A 55.2 (24) A 48 (29.4) A
Non-inductive Amperes N.O. (N.C.):15 (10) A 10 (10) A 10 (10) A

Pilot Duty: 125 VA (N.O. contacts) @ 24 to 240 VAC
125 VA (N.C. contacts) @ 120 to 240 VAC
50 VA (N.C. contacts) @ 24 VAC
A99 Series Temperature Sensors (Various Models and Wire Lead Lengths Available)
Operating: -26 to 140°F (-32 to 60°C)
Shipping: -40 to 185°F (-40 to 85°C)
0 to 95% RH Non-condensing; Maximum Dew Point: 85°F (29°C)
Case and Cover: NEMA 1 - High-Impact Thermoplastic

NEMA 4X - Watertight, High-Impact Noryl® Thermoplastic with
Polycarbonate Faceplate

UL: File E27734; CCN’s XAPX (US), XAPX7 (Canada)
FCC: CFR 47, Part 15, Class A. DOC, Class A

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.

Controls Group

507 E. Michigan Street
P.O. Box 423 Published in U.S.A.
Milwaukee, WI 53201

8 A419 Electronic Temperature Control with NEMA 1 and NEMA 4X Watertight Enclosures Installation Instructions

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