Description
The Johnson Controls P70CA-3E is a PENN P70 Series pressure control with an SPST open-high, automatic-reset switch and a 50 to 500 psig range. Per the manufacturer, the P70, P72 and P170 controls for high pressure applications "are designed primarily for high pressure cut-out control, head-pressure control, and condenser fan cycling control on commercial refrigeration and air conditioning applications. Controls are available in several pressure ranges and are compatible with most common refrigerants. You can also use the controls on other non-corrosive fluid applications. Ammonia compatible models are also available."
P70C models use an SPST open-high PENN® switch with automatic reset: the contacts close line to M1 as pressure falls to the cut-in setpoint and open line to M1 as pressure rises to the cut-out setpoint. A pressure-actuated bellows connected to a pressure tap on the controlled system by capillary or field-installed hose responds to system pressure changes and operates the snap-action electrical switch. The all-steel case and cover give long lasting, rugged protection for internal components, and sight-set calibrated pressure adjustment displays a visible pressure scale that is fully adjustable through the range without removing the cover on Type 1 (NEMA) enclosure models. In the P70 model code the first letter identifies the switch action (C = SPST switch, open-high, automatic reset) and the second letter the enclosure (A = Type 1 NEMA enclosure, no adjustment knob).
* Brand / Manufacturer: Johnson Controls (PENN)
* Model / Part Number: P70CA-3E
* Series: P70 Series pressure control, high pressure applications
* Switch Action: SPST (single-pole, single-throw) open-high, automatic reset - cut-in closes line to M1, cut-out opens line to M1
* Range: 50 to 500 psig (345 to 3,448 kPa)
* Differential: Minimum 60 psi (414 kPa); Maximum 150 psi (1,034 kPa)
* Pressure Connection: 36 in. copper capillary with 1/4 in. SAE flare nut
* Maximum Working Overpressure: 525 psi
* Agency Status: The P70CA-3 is UL Listed as a refrigeration pressure cut out control
* Part Number Note: Johnson Controls itemises P70CA-3 and P70CA-3C; the trailing E of P70CA-3E is not a published suffix. In the enclosure position of the P70 code an E denotes a Type 3R (rainproof) enclosure, so the enclosure on this unit should be confirmed along with the range, differential and pressure connection on the control nameplate
* Electrical Ratings (SPST, cULus single-phase): 120 / 208 / 240 VAC - 24.0 full load amps, 144.0 locked rotor amps, 24.0 resistive amps; 480 VAC - 5.0 FLA, 30.0 LRA; 600 VAC - 4.8 FLA, 28.8 LRA
* Pilot Duty: 125 VA at 120 to 600 VAC; 20 VA at 120 to 300 VDC
* Ambient Temperature: -40 to 140°F (-40 to 60°C)
* Enclosure: Type 1 (NEMA 1); galvanized steel case with plated and painted steel cover
* Dimensions (H x W x D): 3-1/4 x 4 x 2-1/16 in. (83 x 101 x 53 mm)
* Shipping Weight: 2.4 lb (1.08 kg), individual pack
* Compliance: cULus Listed, UL 60730; United States Controllers, Refrigeration - SDFY.SA516; Canada - SDFY7.SA516
* Accessories: BKT38A-600R L-shaped horizontal surface mounting bracket; BKT40A-600R vertical surface mounting bracket
Typical applications are high-pressure cut out, head-pressure control and condenser fan cycling on commercial refrigeration and air conditioning systems, and on air, water and other non-corrosive fluids. Except for models listed as Refrigeration Pressure Cut Out 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. Avoid sharp bends in the capillary tube, and coil and secure excess capillary away from sharp or abrasive surfaces. Do not make field repairs.. Johnson Controls. Johnson Controls. P70CA-3E.
Warranty Information
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