Johnson Controls A19QSC-1C, A19QSC-2C, A19QSC-3C, A19QSC-4C Data Sheet

A19QSC Temperature Control

Single-Stage Electromechanical Temperature Controls

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.

Applications

• cooling tower sump heaters

• control of heating or ventilating equipment

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

Pilot Duty 125 VA, 24 to 600 VAC

When connected
Single-Pole, Single-Throw
(SPST)

When connected
Single-Pole, Double-Throw
(SPDT)

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®

22.0 22.0 22.0 22.0

16.0 9.2 8.0 6.9

representative.

Code No. LIT-1900403

Selection Chart

Product
Code
Number

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
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)

Switch
Action

Range
°F (°C)

Differential
F° (C°)

Bulb and Capillary Bulb Well No.

(Order
Separately)

Range
Adjuster

screwdriver
slot

Maximum Bulb
Temperature
°F (°C)

190 (88)

The performance specifications are nomina l and con form to accep table ind ustry stand ards. For applicati ons at con ditions be yond these specification s, consult th
Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products. © 2015 Johnson Controls, Inc.

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