Penn A421ABT series Installation Instructions Manual

A421 Series Electronic Temperature Controls with
Cycle Timer
Installation Instructions
A421ABT-x, A421AET-x
Applications
IMPORTANT: Use this A421 Series Electronic
Temperature Control only as an operating control.
Where failure or malfunction of the A421 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 A421 control.
IMPORTANT: Utiliser ce A421 Series Electronic
Temperature Control uniquement en tant que
dispositif de régulation. Lorsqu'une défaillance ou un
dysfonctionnement du A421 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
A421 control.
The A421 Series Electronic Temperature Controls are
single-stage, electronic temperature controls with a
single-pole, double-throw (SPDT) output relay.
A421 controls feature a backlit LCD with adjustable
brightness and three-button touchpad interface that
can be set up to restrict user adjustments. An LED
indicates the output relay's On/Off status.
A421 Series Electronic Temperature Controls with Cycle Timer Installation Instructions
Refer to the QuickLIT website
A421 Control with Cycle Timer also provides sensor
offset capability and restricted user adjustment. The
temperature control range is -40 to 212°F or
-40 to 100°C.
The A421 controls are available either in Type 1
(NEMA), IP20 (CE), high-impact plastic enclosures
suitable for surface or DIN rail mounting (Figure 1)
or in Type 4X (NEMA), IP66 (CE) watertight, corrosion
resistant surface mount enclosures (Figure 2).
The control housing base on the Type 4X/IP66 models
can be easily rotated 180º relative to the control
housing cover and LCD, allowing you to bring the
electrical connection to either the top or bottom of the
mounted control. Do not twist the wiring harness
between the housing base and cover more than 180º.
Dimensions
Figure 1: A421ABT Control with Type 1 (NEMA),
IP20 Enclosure; Dimensions, in. (mm)
1
Part No. 24-7664-3043, Rev. B
Issued March 2016
for the most up-to-date version of this document.