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