JOHNSON CONTROLS
Frequently asked questions
Common questions about JOHNSON CONTROLS from 3G Electric.
What is the difference between the Johnson Controls P170SA-1C dual pressure control and a standard single-pressure control?
The P170SA-1C is a dual pressure control that monitors both low-side and high-side pressures in a refrigeration system. It features SPDT switching, with a low-side range of 12 in Hg to 80 psi and a high-side range of 100 psi to 500 psi. This allows it to protect against both low suction pressure and high discharge pressure in a single device, reducing wiring and panel space compared to using two separate single-pressure controls. It is housed in a NEMA 1 enclosure suitable for indoor use.
Can the Johnson Controls VA7810-HGA-2 globe valve actuator be used with valves other than the VG7000 series?
The VA7810-HGA-2 is specifically designed for compatibility with the Johnson Controls VG7000 series globe valves. It operates on 24V AC power and uses a cable connection. While it may physically fit other valve bodies, Johnson Controls does not guarantee performance or stroke accuracy outside the VG7000 series. For non-VG7000 applications, consult the actuator's stroke length and force specifications against the valve's requirements, or use a linkage kit like the M9000-519 for VG1000 series valves.
What is the purpose of the Johnson Controls T-4002-302 pneumatic thermostat conversion kit?
The T-4002-302 is a retrofit kit that converts existing pneumatic thermostats, specifically those from Robertshaw, to Johnson Controls components. It includes a reverse-acting thermostat with horizontal mounting and a white cover. This kit allows facility managers to upgrade or standardize pneumatic control systems without replacing entire valve or damper assemblies, reducing downtime and material costs. It is designed for single-temperature applications and maintains compatibility with existing pneumatic air supplies.
How does the Johnson Controls P545NCB-25C electronic lube oil pressure control differ from mechanical oil pressure controls?
The P545NCB-25C is an electronic lube oil pressure control that uses a pressure transducer and electronic circuitry to monitor oil pressure, rather than a mechanical bellows or capillary tube. It features a 10 psi setpoint, a 120-second time delay to allow oil pressure to build during startup, and an integral alarm circuit. This design provides more precise trip points and eliminates mechanical wear. It is rated for 240V AC and is intended for use with non-corrosive refrigerants and Blitzer compressors.
What is the IP rating of the Johnson Controls P599AAPS105C pressure transmitter, and why is it important?
The P599AAPS105C pressure transmitter has an IP67 rating, meaning it is fully protected against dust ingress and can withstand temporary immersion in water up to 1 meter for 30 minutes. This rating is critical for applications in washdown environments, outdoor installations, or areas with high humidity, such as food processing plants or cooling towers. The transmitter has a 0 psi to 500 psi range, 4 to 20mA DC output, and ±1.5% accuracy, with a burst pressure of 259 bar.
What materials are used in the Johnson Controls V-4332-1007 pneumatically actuated diaphragm valve?
The V-4332-1007 is a 1/2-inch, 3-way brass valve with flare x flare x flare connections. The diaphragm is made of reinforced synthetic rubber, and the actuator is single-acting spring return, operating on an air-to-spring principle. The brass body provides corrosion resistance for water media, while the reinforced diaphragm ensures durability under repeated cycling. This valve is suitable for on-off or diverting service in HVAC and industrial water systems.
