The Johnson Controls P72DA-1C DPST Pressure Control; 50/450# MANUAL RESet 36″ CAP 1/4″ FLARE; Two Pole High Pressure Control, DPST, Open High Close Low, 50 Psi to 450 Psi, Lockout ( Requires Manual Reset ) Differential, 36″ Capillary with 1/4″ Flare Nut, 525 Psi Max Bellows Overpressure, Includes Universal Mounting Bracket, “All Range” for R-12, R-22, R-134A, R-500 and R-502
The P72 Series of controls employs a set of DPST contacts that are opened and closed by the pressure actuated bellows. The heavy duty load-carrying contacts provide direct control of motors having integral line-interrupting overload protectors up to three horsepower. See Electrical Ratings below. Starter is unnecessary. Primarily used on air-conditioning and refrigeration applications but also used to control air, water, glycol, and lube oil pressure.
Features
- full adjustability for all non-corrosive refrigerant pressure applications
- adjustable differential meets the most demanding applications
- direct reading scale
Accessories
- includes a universal mounting bracket
Application Advantages
- control of polyphase motors without use of magnetic starters where protection against overloading and single phasing is otherwise provided
- two separate control circuits necessary for the control of multiple systems
- one set of contacts break the “hot” line when wired as a two pole switch in single phase circuits
- control of two separate load circuits
- automatic control of heavy electrical loads