Penn P77 Series Installation Instructions Manual

P77 Series Controls for High Pressure Applications
Installation Instructions
P77AAA, P77BEA
Applications
P77 Series Controls for High Pressure Applications provide high pressure control of compressors on commercial
refrigeration and air-conditioning applications.
IMPORTANT: Use this P77 Series Control only as an operating control. Where failure or malfunction of the 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 control.
IMPORTANT : Utiliser P77 Series Control uniquement en tant que dispositif de contrôle de fonctionnement.
Lorsqu'une défaillance ou un dysfonctionnement du contrôle 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 contrôle.
P77 control models with Single-Pole, Double-Throw (SPDT) switches allow users to install alarm devices or other
control circuits.
These controls are available in several pressure ranges and are compatible with most common refrigerants. They
may also be used on air, water, and other non-corrosive fluid applications.
High pressure P77BEA Type models with Manual Reset Lockout lock out when the Cut-out pressure is reached
and do not automatically reset after the control has cut out, providing shutdown capability for unmonitored
equipment. See Adjusting the P77 High Pressure Controls.
Type 1 enclosures are standard on most models.
P77 Series Controls for High Pressure Applications Installation Instructions
Refer to the QuickLIT website
1
Part No. 24-7664-3175, Rev. A
Issued September 2018
for the most up-to-date version of this document.