Johnson Controls A19 Series User manual

Master Catalog 125

Temperature Controls Section A

Product Bulletin A19

Issue Date 0579

Code No. LIT-125030

A19 Series Utility Thermostats for Farm,

Industrial and Commercial Use

Application

These temperature controls are designed to cover a

broad range of uses for heating and general purpose

requirements. See “Application” column,

“Specifications” Page 2, for typical uses. Controls

have SPST contacts which open on temperature

increase or they may be supplied in single-pole,

double-throw contact action.

Various control ranges are available to cover working

temperatures from -30 to 550°F (-34 to 288°C).

Closed tank fittings and bulb wells are available for

immersion applications.

These controls are designed for open low and open

high applications. Where critical or high value

products are to be maintained within a specific

temperature differential, a single control should not

be applied to function as both an open low and open

high control. In these applications, a separate back-

up control with alarm contacts should be wired to

indicate when the back-up control operates.

Fig. 2: Space thermostat

with Style 3 coiled bulb

and finger-tip adjusting knob.

Fig. 1: (Left) Control with external range scale,

knob adjustment. (Right) Interior of model with

adjustable differential.

Features

•Dependability -- precision snap-acting dusttight

contacts.

•Dependability -- low volume, responsive liquid

filled sensing elements.

•Wide choice of temperature control functions with

a minimum number of models.

•Precision “repeat” accuracy which is unaffected by

barometric pressure and cross ambient problems.

•Special close differential models available.

General Description

The Series A19 is a small, compact control with

adjustable or fixed differential. Controls supplied with

adjustable differential have an internal scale plate

indicating increments of differential. The controls are

supplied with adjusting lever at minimum differential

stamped on the control. To adjust move the lever to

the differential required. Models are available with or

without external range adjustment and visible scale.

External range adjustment may be by screwdriver slot

or range adjusting knob (Fig. 2).

2 A19 Product Bulletin

A built-in high cutout stop is an integral part of these

controls and may be adjusted quickly and easily in the

field. Product Number A19BAG-1 is especially

designed for portable heaters. It is supplied with a

6 ft cord, 120 V.A.C. polarized plug, and a chain hanger

kit.

Optional Constructions

Note: For most prompt service, select controls listed

under “Specifications,” below. If these are not entirely

suitable for your application, then the following

variations are available.

Adjustable Differential: Available at extra cost.

Armored Capillary: Single braided copper armor may

be supplied at extra cost.

Capillary Tube: Additional length of capillary over

6 ft available at extra cost. Extra length in 2 ft

increments from 6 ft to 10 ft; over 10 ft in 5 ft

increments.

Contact Unit: Close differential or special close

differential may be supplied.

Mounting Bracket: Optional at extra cost.

Types A19AAB, A19AAC, A19BAB, A19BAC

Volts AC 120 208 240

Full Load Amps. 16.0 9.2 8.0

Locked Rotor Amps. 96.0 55.2 48.0

Non-inductive or

Resistance Load Amps.

(Not Lamp Load)

* 22 Amps. 120 to 277 VAC

Pilot Duty - 125 VA @ 24 to 600 VAC

* SPST Rating

Types A19AAE

Volts AC 120 208 240

Full Load Amps. 6.0 3.4 3.0

Locked Rotor Amps. 36.0 20.4 18.0

Non-inductive or

Resistance Load Amps.

(Not Lamp Load)

10 Amps. 120 to 277 VAC

Pilot Duty - 125 VA @ 24 to 277 VAC

Types A19AAB, A19AAC, A19ADB (Hot Water Models)

Volts AC 120 240

Full Load Amps. 10.0 6.0

Locked Rotor Amps. 60.0 36.0

Non-inductive or

Resistance Load Amps. 10.0 6.0

Pilot Duty - 125 VA @ 24 to 600 VAC

Specifications

Product Range Diff. *Max. Bulb Bulb Bulb Bulb Cap. Bulb Cover Range Adjuster

Number Appl. Action °F (°C) °F (°C) Temp. °F

(°C) Style Size

(in.) Well Length

(ft.) Suppor

t (in.) Plain Scale Screw-

driver Knob

A19AAB-4 Fluid

Cutout Opens

on rise 30 to 110

(-1 to 43) 3 (1.7) 140 (60) 1 3/8 x

4-15/16 WEL14A-

602R 63 XX

A19AAB-7 Industrial

Oven Opens

on rise 100 to 300

(38 to 149) 7 (3.9) 350 (177) 1 3/16 x

10-1/8 6XX

A19AAB-

10 Industrial

Oven Opens

on rise 200 to 550

(93 to 288) 10 (5.6) 620 (327) 1 3/16 x

5-5/8 6XX

A19AAC-1 Dual Fuel

Change-

over

SPDT -30 to 50

(-34 to 10) 5 (2.8) 140 (60) 1 3/8 x

4-1/16 Outdoor

Shield

Supplied

63X X

A19AAC-9 Fluid

Cutout SPDT 100 to 240

(38 to 121) 6 (3.3) 290 (143) 1 3/8 x

3-9/16 WEL14A-

602R 63 XX

A19AAE-3 Crop

Drying Opens

on rise 80 to 180

(27 to 82) 2 (1.1) 200 (93) 7 1-1/8 x

1-1/4

Copper

Coil

10 X X

A19ADB-2 Hot

Water

Cutout;

Manual

Reset

Opens

on rise 100 to 240

(38 to 121) Lockout 290 (143) 2 0.290 x

2-11/16 Direct

Immersion

1/2 in. NPT

Conn.

None X X

A19ADN-1 Warm

Air;

Manual

Reset

Opens

on rise 100 to 240

(38 to 121) Lockout 290 (143) 1 3/8 x 3 WEL14A-

602R 63 XX

A19ADP-1 Warm

Air;

Manual

Reset

SPDT 100 to 240

(38 to 121) Lockout 290 (143) 1 3/8 x 3 WEL14A-

602R 63 XX

A19BAB-3 Heating Opens

on rise 30 to 95

(0 to 35) 3 (1.7) 140 (60) 3 Coil None X X

A19BAC-1 Farm

Thermost

at Heat or

Ventilate

SPDT 30 to 110

(0 to 43) 3 (1.7) 140 (60) 3 Coil None X X

A19BAG-1 Portable

Heater Opens

on rise 35 to 95

(0 to 35) 3 (1.7) 140 (60) 3 Coil None X X

* Maximum bulb temperature which the element can withstand at infrequent intervals during life of control, such as shipping conditions. This is not the

temperature at which the control can withstand on repeat cycles.

A19 Product Bulletin 3

Packing Nut: Part No. FTG13A-600R is available for

closed tank applications where the temperature does

not fall below -35°F (-37°C) or exceed +250°F

(121°C). Maximum liquid pressure limit is 150 psig

(1034 kPa). For applications where the temperature

or liquid pressure exceeds these limits specify Style 4

element with all metal packing nut as an integral part

of the control.

Range Adjustments: Concealed dial with

screwdriver slot (plain cover), exposed dial with

screwdriver slot, dial and knob adjustment or models

with factory sealed setting may be supplied.

Ranges: For ranges other than those shown in

“Specifications” table, contact Customer Service.

Sealed Stop: Available at extra cost.

Miscellaneous Specifications

Case: .062 in. cold rolled steel. Gray baked enamel

finish.

Cover: .025 in. cold rolled steel. Gray baked enamel

finish.

Contact Unit: Precision Pennswitch. Snap acting

dust-tight contacts.

Shipping Weights

Shipping weights shown below are approximate.

Weights vary depending upon construction.

Generally, overpack will contain 25 individually

packed controls.

Individual pack: 1.0 lb.

Overpack containing 25 individually packed units:

26.0 lbs.

Ordering Information

1. Specify Product Number only, if available (see

the “Specifications” chart).

2. If Product Number is not available specify Type

Number.

a. Capillary length.

b. Range.

c. Bulb style.

d. Bulb well, if required.

e. Packing nut, if required.

f. Any other miscellaneous specifications.

Repairs and Replacement

Repairs must not be made in the field other than

replacement of the cover, well assembly and packing

nut assembly. When ordering replacement parts,

give Product and Serial Numbers. Controls requiring

attention should be returned to the factory or nearest

Johnson Controls representative for inspection and

service.

Fig. 3: Element Styles available on Series A19

4 A19 Product Bulletin

Bulb and Bulb Accessories

A19 Product Bulletin 5

6 A19 Product Bulletin

Notes

A19 Product Bulletin 7

Notes

8 A19 Product Bulletin

Notes

Controls Group

507 E. Michigan Street

P.O. Box 423 Printed in U.S.A.

Milwaukee, WI 53202

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