A19QSC Type Temperature Controls with NEMA 4X Raintight Enclosures Installation Instructions
6
Setup and Adjustments
Turn the knob under the temperature control cover to adjust the setpoint.
Before leaving the installation, observe at least three complete operating cycles of the controlled equipment to
ensure that all components are functioning correctly.
Follow the guidelines in the
section to check for proper A19QSC temperature control operation.
For heating applications:
1. Turn the dial clockwise to a setpoint greater than the sensed temperature. The heating system should cycle on.
2. Turn the dial counterclockwise to a setpoint less than the sensed temperature and the heating system should
cycle off.
For cooling or ventilating applications:
1. Turn the dial clockwise to a setpoint greater than the sensed temperature and the ventilating or cooling system
should cycle off.
2. Turn the dial counterclockwise to a setpoint less than the sensed temperature and the ventilating or cooling
system should cycle on.
If the temperature does not operate in the manner described previously, check the wiring and tightness of wiring
connections.
Operation
When the temperature at the sensing element rises to the setpoint (dial setting), the switch between R and Y
closes and the switch between R and B opens on SPDT models. See Figure 2, Figure 3, and Figure 4.
Repair Information
If the A19QSC type electromechanical temperature control fails to operate within its specifications, replace the unit.
For a replacement A19QSC control, contact the nearest PENN by Johnson Controls® representative.
Technical Specifications
A19QSC Type Temperature Controls with NEMA 4X Raintight Enclosures
Switch Contact Ratings
Applied VAC
24
120
208
240
277
600
Motor, Full Load Amperes
-
16
9.2
8
-
-
Motor, Locked Rotor Amperes
-
96
55.2
48
-
-
Non-inductive, Single-Pole, Single-Throw
(SPST) Amperes
-
22
22
22
22
-
Non-inductive, Single-Pole, Double-Throw
(SPDT) Amperes
-
16
16
16
16
-
Pilot Duty Volt-Amperes
125
125
125
125
125
125
Ambient Operating Conditions
-26–140°F (-32–60°C)
Ambient Storage Conditions
-40–140°F (-40–60°C)
Shipping Weight
1.2 lb (0.54 kg)
Compliance
UL Listed; File E6688, CCN XAPX (US) and XAPX7 (Canada)
UL Listed as Type 4X
The performance specifications are nominal and conform to acceptable industry standards. For application at conditions beyond these
specifications, consult Johnson Controls Application Engineering at (800) 275-5676. Johnson Controls shall not be liable for damages resulting
from misapplication or misuse of its products.
