Johnson Controls A419ABG-3C Installation Instructions Manual

Installation Instructions

Issue Date June 16, 2003

A419ABG-3C Electronic Temperature Control

Application

IMPORTANT: Use this A419ABG-3C Electronic

Temperature Control only as an operating control.
Where failure or malfunction of the A419ABG-3C
Electronic Temperature Control could lead to
personal injury or property damage to the controlled
equipment or other property, additional precautions
must be designed into the system. Incorporate and
maintain other devices such as supervisory or alarm
systems or safety or limit controls intended to warn
of, or protect against, failure or malfunction of the
A419ABG-3C Electronic Temperature Control.

The A419 Electronic Temperature Control is a
single-stage, electronic temperature control. Pre-wired
cords with plug and receptacle ends are provided for
quick and simple installation.

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 120 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. The temperature
sensor supplied with the control is interchangeable
with compatible Johnson Controls/PENN® A99
temperature sensors.

FCC Compliance

This equipment has been tested and found to comply
with the limits for a Class A digital device pursuant to
Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful
interference when the 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/her own expense.

Canadian DOC Compliance

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.

Installation

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

Parts Included

Pre-wired cords with plug and receptacle ends are
provided for quick and simple installation.

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.

© 2003 Johnson Controls, Inc. 1

Part No. 24-7664-2543, Rev. — www.johnsoncontrols.com

Dimensions

9/64
(3.7)

1/2

(13)

2-15/16

(75)

DIN
Rail

2-3/8

(61)

2-3/8

(61)

MENU

(127)

4

(102)

• A99 temperature sensors are not polarity
sensitive. Wire the leads to (+) SEN and (-) COM
on the sensor terminal block (TB3). See Figure 2.
Keep the leads between the control and sensor as

5

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.

1-9/16
(40)

6 ft (1.8 m)

Electrical Cords with

Male and Female Plugs

7/16

(11)

Sensor

2

(50)

1/4

(6)

Sensor

Wire Lead

6.6 ft

(2 m)

Figure 1: Dimensions, in. (mm)

Mounting

An A419 control has a standard high-impact plastic
NEMA 1 enclosure. The A419 control is not position
sensitive but should be mounted for convenient wiring
and adjustment.

Wiring

!

WARNING: Risk of Electrical Shock

Disconnect each of multiple power supplies before
making electrical connections. More than one
disconnect may be required to completely
de-energize equipment. Contact with components
carrying hazardous voltage can cause electrical
shock and may result in severe personal injury or
death.

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)

(Optional)

Binary

Input

Switch

Cable

Shield

(if used)

A99

Sensor

120 VAC

Neutral

120 VAC Application

A419ABG-3

(+)

BIN

(–)

COM

(+)

SEN

TB3

TB1

Not

Used

TB2

120

Not

Used

AC COM

C

Load

NO

All wiring must conform to the National Electrical Code
and local regulations.

Observe the following guidelines and refer to Figure 2
and Table 1 when wiring the sensor to the
A419 control.

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

• 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.

2 A419ABG-3 Electronic Temperature Control Installation Instructions

Figure 2: Typical 120 VAC Application Wiring

C

Not

Used

A

COM

120

Not

Used

NO

C

TB1

Male
Plug

TB2

Female
Receptacle

Figure 3: Factory Power Wiring

Setup and Adjustments

!

WARNING: Risk of Electrical Shock

Disconnect each of multiple power supplies before
making electrical connections. More than one
disconnect may be required to completely de­energize equipment. Contact with components
carrying hazardous voltage can cause electrical
shock and may result in severe personal injury or
death.

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.

A419ABG-3 Electronic Temperature Control Installation Instructions 3

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 Table 2 and Figure 5.