Johnson Controls P70MA-1 Pressure Control

Single Pole Dual Pressure Control, SPST Switching, 20" Wc to 100 Psi Low Pressure, 7 Psi to 50 Psi Differential Low Pressure, 100 Psi to 500 Psi High Pressure Range, Lockout ( Requires Manual Reset ) Differential, 36" Capillary with 1/4" Flare Nut Connection, "All Range" for R-12, R-22, R-134A, R-500 and R-502

P70MA-1 is the direct replacement for 2891550

Johnson Controls P70MA-1 Dual Pressure Control – SPST, Manual Reset, OEM-Grade HVAC/R Control

The Johnson Controls P70MA-1 Pressure Control is a reliable dual pressure switch designed for commercial refrigeration and air conditioning systems. With SPST switching, a broad low-pressure range (20” Wc to 100 psi), and high-pressure range (100 psi to 500 psi), this OEM-grade control offers precise management of both high and low pressures for maximum system performance.

Equipped with a 36" capillary and 1/4" flare nut connection, the P70MA-1 features a manual reset lockout, providing safety and durability in demanding HVAC/R applications. It's compatible with common refrigerants including R-12, R-22, R-134a, R-500, and R-502, making it highly versatile across various system types.

Key Features:

• Model: P70MA-1

• Switch Type: SPST (Single-Pole, Single-Throw)

• Low Pressure Range: 20” Wc to 100 psi

• Low Pressure Differential: 7 psi to 50 psi

• High Pressure Range: 100 psi to 500 psi

• Manual Reset Lockout for High Pressure

• Capillary Length: 36"

• Connection Type: 1/4" Flare Nut

• Compatible Refrigerants: R-12, R-22, R-134A, R-500, R-502

• Durable Steel Case & Cover for rugged protection

• All-Range Adjustability without cover removal

• MICRO-SET™ Differential Option for precise low pressure control

• Ammonia-Compatible Models Available

Applications:

• Commercial Refrigeration Units

• Air Conditioning Systems

• Compatible with Johnson Controls® P70, P72, and P170 Series Systems

• Ideal for OEM system replacements or new installs

Why Choose Genuine Johnson Controls OEM:

✔️ Factory-calibrated precision
✔️ Durable and long-lasting construction
✔️ Seamless integration into existing systems
✔️ Maintains equipment warranty and compliance

Upgrade your HVAC or refrigeration system with the Johnson Controls P70MA-1 Pressure Control—engineered for precision, safety, and performance.

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