Product Overview

The performance specifications are nominal and conform to acceptable industry standards. For applications at conditions beyond these specifications, consult th
Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products. © 2015 Johnson Controls, Inc.
R-36
Technical Specifications
Maximum ambient temperature: 140°F (60°C).
Electrical Ratings
Motor Ratings VAC 120 208 240 277
AC Full Load Amperes 16.0 9.2 8.0 —
AC Locked Rotor Amperes 96.0 55.2 48.0 —
Non-Inductive
Amperes
When connected
Single-Pole, Single-Throw
(SPST)
22.0 22.0 22.0 22.0
When connected
Single-Pole, Double-Throw
(SPDT)
16.0 9.2 8.0 6.9
Pilot Duty 125 VA, 24 to 600 VAC
A19 Temperature Control with NEMA 4X Enclosure (Remote Bulb)
Description
The A19 Temperature Control is a remote
bulb temperature control with a watertight
NEMA 4X enclosure.
Refer to the A19 Series Hot Water Heating
Controls Well Immersion Product Bulletin
(LIT-125025) for important product application
information.
Features
• watertight gasketed thermoplastic
enclosure that meets NEMA 4X
specifications
• concealed setpoint adjustment
Repair Information
If the A19 Temperature Control with NEMA 4X
Enclosure (Remote Bulb) fails to operate within
its specifications, replace the unit. For a
replacement control, contact the nearest
Johnson
Controls® representative.
Applications
• cooling tower sump heaters
• control of heating or ventilating equipment
A19QSC Temperature Control
Selection Chart
Product
Code
Number
Switch
Action
Range
°F (°C)
Differential
F° (C°)
Bulb and Capillary Bulb Well No.
(Order
Separately)
Range
Adjuster
Maximum Bulb
Temperature
°F (°C)
A19QSC-1C SPDT 0 to 150 (-18 to 66) 5±2 (2.82 ±1.11) fixed 3/10 x 2-1/2 in.; 10 ft. capillary WEL11A-601R Concealed
screwdriver
slot
190 (88)
A19QSC-2C 100 to 250 (38 to 121) 6±2 (32 ±1.11) fixed 3/10 x 2-3/8 in.; 10 ft capillary 290 (143)
A19QSC-3C 200 to 350 (93 to 176) 5±2 (2.82 ±1.11) fixed 3/10 x 2-1/4 in.; 10 ft capillary — 390 (199)
A19QSC-4C 0 to 190 (-18 to 88) 5±2 (2.82 ±1.11) fixed 3/10 x 2-1/2 in.; 20 ft capillary WEL11A-601R 190 (88)
Single-Stage Electromechanical Temperature Controls
Code No. LIT-1900403