Penn A19QSC User manual

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A19QSC Type Temperature Controls with NEMA 4X Raintight Enclosures
Installation Instructions
Applications
The A19QSC Type Temperature Controls are designed for use in many agricultural applications. For installations
that require National Electrical Code (NEC) Article 547 compliance, use a series A19P or T19P control.
The A19QSC Controls have rugged Noryl plastic enclosures and are UL Listed as Type 4X. See Figure 1 and the
Technical Specifications section for additional information.
The A19QSC Type Temperature Controls have internal setpoint adjustment dials and range scales.
IMPORTANT: Use this A19QSC Type Temperature Control only as an operating control. Where failure or
malfunction of the temperature control could lead to personal injury or property damage to the controlled
equipment or other property, additional precautions must be designed into the control system. Incorporate and
maintain other devices, such as supervisory or alarm systems or safety or limit controls, intended to warn of or
protect against failure or malfunction of the temperature control.
IMPORTANT : Utiliser ce A19QSC Type Temperature Control uniquement en tant que dispositif de contrôle de
fonctionnement. Lorsqu'une défaillance ou un dysfonctionnement du temperature control risque de provoquer
des blessures ou d'endommager l'équipement contrôlé ou un autre équipement, la conception du système de
contrôle doit intégrer des dispositifs de protection supplémentaires. Veiller dans ce cas à intégrer de façon
permanente d'autres dispositifs, tels que des systèmes de supervision ou d'alarme, ou des dispositifs de
sécurité ou de limitation, ayant une fonction d'avertissement ou de protection en cas de défaillance ou de
dysfonctionnement du temperature control.
A19QSC Type Temperature Controls with NEMA 4X
Raintight Enclosures
Installation Instructions Part No. 24-7664-2667, Rev. C
Issued September 2018

A19QSC Type Temperature Controls with NEMA 4X Raintight Enclosures Installation Instructions
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Dimensions
Figure 1: Dimensions for A19QSC Temperature
Controls with NEMA 4X Enclosures, in. (mm)
MENU
2.87
(73)
3x 1/2” Conduit
Knockout
2.18
(55)
2.81
(71)
4x .20 (5) Mtg Hole
6.10
(154)
0.06 (1.5) OD, Length Varies by Model
5.66
(144)
1.26
(32)
1.07
(27)
1.75
(44)
FIG:dim

A19QSC Type Temperature Controls with NEMA 4X Raintight Enclosures Installation Instructions
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Mounting
Mount the temperature control to a flat surface with screws through the holes in the mounting ears on the back of
the case. See Figure 1.
!
CAUTION: Risk of Environmental and Property Damage.
Avoid sharp bends in the capillary tubes. Sharp bends can weaken or kink capillary tubes,
which may result in refrigerant leaks or restrictions of flow.
MISE EN GARDE : Risque de dommages environnementaux et dégâts matériels.
Éviter de former des coudes serrés avec les tubes capillaires. Les coudes serrés peuvent
affaiblir les tubes capillaires ou engendrer des pliures, ce qui risque de provoquer des fuites
de réfrigérant ou d'en gêner l'écoulement.
!
CAUTION: Risk of Environmental and Property Damage.
Coil and secure excess capillary tubing away from contact with sharp or abrasive objects or
surfaces. Vibration or sharp or abrasive objects in contact with capillary tubes can cause
damage that may result in refrigerant leaks (or loss of element charge), which may result in
damage to the environment or property.
MISE EN GARDE : Risque de dommages environnementaux et dégâts matériels.
Enrouler et fixer l'excédent de tubes capillaires de manière à éviter tout contact avec des
objets coupants ou des surfaces abrasives. Des vibrations ou des objets coupants ou
abrasifs en contact avec les tubes capillaires risque d'endommager ceux-ci et
d'occasionner des fuites de réfrigérant (ou des pertes de charge), susceptibles de
provoquer des dommages environnementaux ou des dégâts matériels.
!
CAUTION: Risk of Property Damage.
Do not dent or deform the sensing bulb. Dents or deformations in the sensing bulb can
change the calibration, may cause the control to operate at temperatures other than the set
point, and may result in other property damage.
MISE EN GARDE : Risque de dégâts matériels.
Ne pas bosseler ou déformer le bulbe thermostatique. Tout bosselage ou toute déformation
du bulbe thermostatique risque de modifier les paramètres d'étalonnage, d'induire des
températures de fonctionnement du dispositif de contrôle différentes du point de consigne et
de provoquer d'autres dégâts matériels.
IMPORTANT: Do not install the A19QSC Control where the maximum temperature exceeds 140°F (60°C).
Installing the device where temperatures exceed 140°F (60°C) may cause damage to the A19QSC Control and
may void the warranty.

A19QSC Type Temperature Controls with NEMA 4X Raintight Enclosures Installation Instructions
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Wiring
There are three 1/2 in. (trade-size) conduit knockouts on the NEMA 4X enclosure. To make wiring connections,
proceed as follows:
1. Loosen the four cover screws and remove the cover. Do not damage the O-ring seal.
2. Select the knockout to be removed. Place a screwdriver blade on the knockout near the edge. Apply a sharp
blow to the screwdriver handle to loosen the knockout.
3. For watertight connection to rigid conduit, connect an approved watertight conduit fitting to the conduit first, and
then connect the fitting to the A19QC control enclosure.
4. Insert wire through conduit opening.
5. Make wiring connections to the screw terminals. See Figure 2, Figure 3, and Figure 4.
6. Verify the O-ring seal is properly seated.
7. Replace the cover and tighten the screws.
!
WARNING: Risk of Electric Shock.
Disconnect the power supply before making electrical connections. Contact with components
carrying hazardous voltage can cause electric shock and may result in severe personal injury or
death.
AVERTISSEMENT : Risque de décharge électrique.
Débrancher l'alimentation avant de réaliser tout branchement électrique. Tout contact avec des
composants conducteurs de tensions dangereuses risque d'entraîner une décharge électrique
et de provoquer des blessures graves, voire mortelles.
IMPORTANT: Use copper conductors only. Make all wiring connections in accordance with local, national, and
regional regulations. Do not exceed the A19QSC Control’s electrical ratings.
IMPORTANT: Use the terminal screws supplied in the contact block. Using other terminal screws may cause
damage to the switch and will void the warranty.
Figure 2: Typical Wiring for Heating Applications
R
B
Y
Heating
Load
L1
L2
Dial
RB
to opens on
temperature
increase.
A19 Temperature
Control
FIG:ht_app

A19QSC Type Temperature Controls with NEMA 4X Raintight Enclosures Installation Instructions
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Figure 3: Typical Wiring for Cooling Applications
R
B
Y
Cooling
Load
L1
L2
Dial
RY
to closes on
temperature
increase.
A19 Temperature
Control
FIG:cl_app
Figure 4: Typical Wiring for Combination Heating
and Cooling Applications
R
B
Y
Heating
Load
L2
Dial
A
19 Temperature
Control
Cooling
Load
User Supplied SPDT Switch
or Switching Thermostat
RB
RY
to opens and
to closes on
temperature
increase.
FIG:clht_app

A19QSC Type Temperature Controls with NEMA 4X Raintight Enclosures Installation Instructions
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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 Operation 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
-22222222-
Non-inductive, Single-Pole, Double-Throw
(SPDT) Amperes -16161616-
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 [phone]. Johnson Controls shall not be liable for damages resulting
from misapplication or misuse of its products.

A19QSC Type Temperature Controls with NEMA 4X Raintight Enclosures Installation Instructions
® Johnson Controls and PENN are registered trademarks of Johnson Controls in the
United States of America and/or other countries. All other trademarks used herein are the property
of their respective owners. © Copyright 2018 by Johnson Controls. All rights reserved.
www.penncontrols.com
European Single Point of Contact: NA/SA Single Point of Contact: APAC Single Point of Contact:
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WESTENDHOF 3
45143 ESSEN
GERMANY
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507 E MICHIGAN ST
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USA
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