Description
The Johnson Controls P70M-1 is a PENN P70 Series dual pressure control - a single SPST control that provides combined high and low pressure protection for a compressor. Per the manufacturer, the P70, P72 and P170 Controls for Dual Pressure Applications "provide combined high and low pressure control of compressors on commercial refrigeration and air conditioning applications," and the P70L, M and N models "have a Single-Pole Single-Throw (SPST) switch... available with automatic or manual reset lockout options."
One control handles both sides of the system: the low-pressure side cuts out on falling suction pressure with an adjustable differential, while the high-pressure side cuts out on rising head pressure. On this model the high-pressure side uses a Manual Reset Lockout, which "does not allow the pressure control to reset automatically after CUT OUT is reached, and provides shutdown capability for unmonitored equipment." These controls are available in several pressure ranges and are compatible with most common refrigerants. NEMA 1 enclosures are standard on most models.
* Brand / Manufacturer: Johnson Controls (PENN)
* Model / Part Number: P70M-1
* Series: P70 Series controls for dual pressure applications
* Switch Action: SPST (single-pole, single-throw)
* Low Pressure Side - Range: 20 in. Hg to 100 psig (-68 to 690 kPa)
* Low Pressure Side - Differential: Adjustable, minimum 6 psi (41 kPa) / maximum 50 psi (345 kPa)
* High Pressure Side - Range: 100 to 500 psig (690 to 3,447 kPa)
* High Pressure Side - Differential (non-adjustable): Lockout - requires manual reset
* Pressure Connector: 36 in. (0.9 m) capillary with 1/4 in. flare nut
* Limited Knob Adjustment: None
* Maximum Overpressure (non-recurring): Low side 325 psig (2,241 kPa) all-range; high side 525 psig (3,620 kPa)
* Maximum Working Pressure: Low side 100 psig (690 kPa); high side 500 psig (3,447 kPa)
* Refrigerant Compatibility: Most common non-corrosive refrigerants
* Note on this part number: 'P70M-1' is incomplete - PENN dual pressure model codes carry an enclosure letter after the switch letter (for example P70MA-1, which Johnson Controls itemises in the dual pressure bulletin Table 3 and catalog Table 171). The data above is that published for the P70MA-1; verify the full model number on the control nameplate before ordering
* Electrical Ratings (SPST, P70L/M/N types): 120 VAC - 1.5 hp, 20 FLA, 120 LRA; 208 VAC - 3 hp, 18.7 FLA, 112.2 LRA; 240 VAC - 3 hp, 17 FLA, 102 LRA; 480 VAC - 5 FLA, 30 LRA; 600 VAC - 4.8 FLA, 28.8 LRA (480 and 600 VAC ratings are not for compressor motor loads). Non-inductive 22 A at 120 to 240 VAC; hermetic compressor rating 20 FLA / 120 LRA at 208/240 VAC; pilot duty 125 VA at 120 to 600 VAC, 57.5 VA at 120 to 300 VDC
* Enclosure: NEMA 1 - galvanized steel case, plated and painted steel cover
* Dimensions (H x W x D): 3-1/4 x 5-11/16 x 2-1/16 in. (83 x 144 x 53 mm)
* Shipping Weight: 3.5 lb (1.6 kg), individual pack
* Ambient Conditions: -40 to 140°F (-40 to 60°C)
* Accessories: 271-51 Universal Mounting Bracket (supplied with standard controls)
* Agency Listings: High pressure side (only) UL Listed as a Refrigeration Pressure Limiting Control. For listing information on specific models, Johnson Controls directs enquiries to PENN Refrigeration Application Engineering
Typical duty is compressor control on commercial refrigeration and air conditioning systems. Except for models listed as refrigeration pressure limiting controls, use this control only as an operating control - where failure or malfunction could lead to personal injury or property damage, incorporate additional supervisory, alarm, safety or limit devices into the control system. Use copper conductors only and wire in accordance with local and national electrical codes. Do not make field repairs; contact a Johnson Controls/PENN authorized representative for replacement.. Johnson Controls. Johnson Controls. P70M-1.
Warranty Information
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