1. Introduction
This instruction manual provides essential information for the safe and efficient installation, operation, and maintenance of the Johnson Controls P70GA-11C Pressure Control. This device is designed for industrial applications, specifically within hydraulic, pneumatic, and pumping systems, to monitor and regulate pressure. Please read this manual thoroughly before attempting any procedures to ensure proper function and to prevent potential hazards.
2. Safety Information
WARNING: Failure to follow these safety instructions could result in property damage, serious injury, or death.
- Installation and servicing must be performed by qualified, experienced personnel only.
- Disconnect all power to the system before installing or servicing the device.
- Ensure the system is depressurized before making any pressure connections.
- Verify that the pressure control is rated for the specific application's pressure and temperature limits.
- Adhere to all local and national electrical and plumbing codes.
- Do not operate the device if it appears damaged.
3. Product Overview
The Johnson Controls P70GA-11C is a robust pressure control designed for reliable performance in demanding industrial environments. It typically features adjustable setpoints for controlling pump operation or system pressure within specified ranges. Its primary function is to maintain system integrity and optimize energy consumption by responding to pressure fluctuations.
Figure 1: Johnson Controls brand logo. This image represents the manufacturer of the P70GA-11C pressure control.
4. Setup and Installation
4.1 Mounting
Select a stable, vibration-free location for mounting the P70GA-11C. Ensure adequate clearance for wiring, piping, and future adjustments. Use appropriate fasteners to secure the unit firmly to a panel or wall.
4.2 Pressure Connections
- Ensure the system is depressurized.
- Connect the pressure sensing line from the system to the pressure port on the P70GA-11C. Use appropriate fittings and sealants to prevent leaks.
- Avoid overtightening connections, which can damage the unit or fittings.
4.3 Electrical Wiring
Refer to the wiring diagram provided with the unit (not included in this general manual) for specific connections. Ensure all wiring conforms to local electrical codes and the device's voltage and current ratings. Use proper wire gauges and ensure secure, insulated connections.
- Connect power supply wires to the designated terminals.
- Connect control wires to the pump starter or other controlled device.
- Ensure proper grounding.
5. Operating Instructions
5.1 Initial Power-Up
After completing installation and verifying all connections, slowly re-pressurize the system and apply power to the P70GA-11C. Observe the system for any leaks or abnormal operation.
5.2 Setting Pressure Setpoints
The P70GA-11C typically features adjustable setpoints. Use a flat-head screwdriver or appropriate tool to adjust the cut-in and cut-out pressure settings. Refer to the specific model's labeling for adjustment directions (e.g., "RANGE" and "DIFFERENTIAL" screws).
- Cut-in Pressure: The pressure at which the controlled device (e.g., pump) is activated.
- Cut-out Pressure: The pressure at which the controlled device is deactivated.
- Adjust in small increments and observe system response.
6. Maintenance
Regular maintenance ensures the longevity and accuracy of your P70GA-11C Pressure Control.
- Periodic Inspection: Annually inspect the unit for signs of physical damage, corrosion, or loose connections.
- Cleaning: Keep the exterior of the unit clean and free of dust or debris. Do not use abrasive cleaners or solvents.
- Calibration Check: Periodically verify the accuracy of the pressure setpoints against a calibrated pressure gauge. Adjust if necessary.
- Leak Detection: Regularly check all pressure connections for leaks.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit not responding to pressure changes. | Incorrect wiring; clogged pressure port; faulty sensor. | Check wiring against diagram; inspect and clear pressure port; contact qualified service personnel. |
| Pump cycles too frequently. | Differential setting too narrow; system leak; undersized expansion tank. | Increase differential setting; check for and repair leaks; inspect expansion tank. |
| Inaccurate pressure readings. | Clogged pressure line; unit out of calibration; external gauge error. | Clear pressure line; recalibrate unit; verify external gauge accuracy. |
8. Specifications
- Brand: Johnson Controls
- Model: P70GA-11C
- ASIN: B00EZH8ML8
- Type: Pressure Control
- Application: Industrial Hydraulics, Pneumatics, Pumping Systems
- Note: Specific pressure ranges, electrical ratings, and connection sizes are typically found on the product label or in a dedicated technical data sheet.
9. Warranty and Support
For warranty information, technical support, or service inquiries regarding your Johnson Controls P70GA-11C, please contact Johnson Controls directly or refer to their official website. Keep your purchase receipt and product serial number available when contacting support.
Johnson Controls Official Website: www.johnsoncontrols.com
