PENN COMMERCIAL REFRIGERATION
PRESSURE CONTROLS
ADJUSTABLE PRESSURE SWITCH
P78
DUAL PRESSURE , IP54
The P78 series pressure controls may be used for control functions or limit functions , depending on model number . All models are provided with alarm contacts ( except P78ALA ). All standard models have phosphor bronze bellows and brass pressure connections . Models for use with ammonia are provided with stainless steel bellows and connectors . Devices conforming to PED 2014 / 68 / EU Cat . IV have a double bellows on the high pressure versions .
Their IP54 classification means that these pressure controls are suitable for almost all applications .
FEATURES
• High refrigerant pressure . Suitable for R410A and CO 2 subcritical applications .
• Models with gold plated contacts available
• Generous wiring space
• Splash-proof enclosure ( IP54 )
• Trip-free manual reset
• Patented separate alarm contacts for both low pressure and high pressure cut-out ( except P78ALA )
• Wetted materials approved for use with standard and ( mild ) flammable A2L / A3 refrigerants
APPLICATION
These pressure controls are designed for use in a variety of applications involving refrigeration high or low pressure . Models supplied have a “ whole range ” design , enabling them to be used with refrigerants R22 , R134A , R404A , R410A , CO 2 sub-critical and all other non-corrosive refrigerants which are within the operating range of the control . They may also be used for other high or low pressure applications such as air , water etc . Models which can be used with ammonia are included in the program . Also models tested and approved to PED 2014 / 68 / EU Cat . IV ( supersedes DIN and TUV approval ) are included in the program .
DIMENSIONS ( in mm )
122 53
80
22,5 Style 5 Style 15 Style 28 Style 30
44 - REFRIGERATION
European Products Catalogue 2021