P70SA-1C Johnson Controls Pressure Control

Overview

The Johnson Controls P70SA-1C is a high-performance dual pressure control switch designed for commercial refrigeration and air conditioning applications. It provides combined high- and low-pressure control, responding directly to system pressure changes to regulate compressor operations and protect equipment. This MICRO-SET series control is compatible with non-corrosive refrigerants and features dual independent single-pole double-throw (SPDT) switches to accommodate control circuits or alarm devices.

Features

• Heavy-duty all-steel case and cover to protect internal components from rugged environments.
• Sight-Set calibrated pressure adjustment offering a visible scale for straightforward setup.
• Dual independent SPDT switches supporting simultaneous system control and remote alarm connectivity.
• MICRO-SET differential adjustment mechanism ensuring precision low-side cutout settings.
• Switchable high-pressure reset capability allowing options between automatic operation and a manual reset lockout.
• Includes a 36-inch capillary with a 1/4-inch flare nut connection.

Specifications

• Series: P70 Series Dual Pressure Controls
• Switch Action: Two independent SPDT switches
• Low Pressure Range: 12 in. Hg to 80 psig (-41 to 552 kPa)
• Low Pressure Differential: Adjustable from 5 psi minimum to 35 psi maximum (34 to 241 kPa)
• High Pressure Range: 100 to 500 psig (690 to 3447 kPa)
• High Pressure Differential: Lockout fixed at 65 psi (448 kPa)
• Electrical Contact Ratings: 16 A full load / 96 A locked rotor at 120 VAC; 9.2 A full load / 55.2 A locked rotor at 208 VAC; 8 A full load / 48 A locked rotor at 240 VAC
• Pressure Connection: 36 in. capillary with 1/4 in. flare nut

Applications

• Designed primarily for combination high-pressure safety cutout and low-pressure cycling control.
• Commonly implemented in commercial refrigeration systems, commercial air conditioning applications, and cooling infrastructure.
• Well-suited for pump-down control, capacity regulation, and low-pressure cutout functions using standard non-corrosive refrigerants.