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The performance specifications are nominal and conform to acceptable industry standards. For applications at conditions beyond these specifications, consult the local Johnson Controls office.
Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products. © 2015 Johnson Controls, Inc. www.johnsoncontrols.com
R-23
A19 Series Hot Water Temperature Control (Well Immersion)
Description
The A19 Series Temperature Controls are a universal replacement
control for open high or single-pole, double-throw (SPDT)
applications. The control is furnished with a well assembly for 1/2 in.
tapping.
Refer to the A19 Series Hot Water Heating Controls Well Immersion
Product Bulletin (LIT-125025) for important product application
information.
Features
liquid-filled element provides rapid response to temperature
change
adjustable differential
universal replacement
Applications
This operating control is ideal for hot water boilers.
Selection Charts
Technical Specifications
A19 Series Hot Water Temperature Control (Well Immersion)
Product Code
Number
Application Switch
Action
Range
°F (°C)
Differential
F° (C°)
Well Connector
Size–NPT
Range
Adjuster
Max. Bulb Temp.
°F (°C)
A19ABC-11C Open high (R-B)
Open low (R-Y)
Single-Pole,
Double-Throw
(SPDT)
100 to 240
(38 to 116)
6 to 24
(3 to 13)
1/2 in. Convertible 250 (121)
A19ABC-12C 1/2 in.; 8 ft. capillary 290 (143)
A19ADB-2C High temperature
lockout
Single-Pole,
Single-Throw
(SPST)
Open high with
lockout
100 to 240
(38 to 116)
Manual reset
(locks out high)
1/2 in. Knob 250 (121)
Replacement Parts
Product Code Number Description
CVR28A-617R Concealed adjustment cover
CVR28A-618R Visible scale cover
KNB20A-602R Knob kit
Electrical Ratings
Motor Ratings VAC 120 240
AC Full Load A 10.0 6.0
AC Locked Rotor A 60.0 36.0
Pilot Duty 125 VA, 24 to 600 VAC
A19ABC-12 Temperature Control
A19ABC-11
Temperature
Control
Single-Stage Electromechanical Temperature Controls
Code No. LIT-1927030