1. Introduction
This manual provides essential information for the safe and effective installation, operation, and maintenance of your Square D Pumptrol Water Pressure Switch, Model FSG2J21CP. This device is designed to control electrically driven water pumps and air compressors, suitable for jet pumps, submersible pumps, and reciprocating pump applications.
Please read this manual thoroughly before attempting any installation or operation to ensure proper function and safety.
2. Important Safety Information
Failure to follow these instructions can result in serious injury or death.
- HAZARDOUS VOLTAGE: Always disconnect power to the pump and pressure switch at the circuit breaker or fuse box before attempting any installation, maintenance, or troubleshooting. Do not remove the cover or touch any internal components while power is connected.
- EXCESSIVE PRESSURE: This device operates with a maximum pressure rating of 220 psi (1517 kPa). Ensure your system's pressure does not exceed this limit. Regularly check the system's operation after any adjustments and verify that the supply line is free from blockages.
- All electrical work must be performed by a qualified electrician and comply with all local and national electrical codes.
- Ensure the product is installed in a dry, protected location, away from direct moisture or extreme temperatures, unless specifically rated for such conditions.
3. Product Overview
The Square D Pumptrol Water Pressure Switch is a robust device designed for reliable control of water pumps. It features a durable housing and precise internal mechanisms to monitor and respond to water pressure changes.
Figure 1: Front view of the Square D Pumptrol Water Pressure Switch. The image displays the compact grey housing, the prominent 'Square D' and 'Pumptrol' embossed logos, and a warning label indicating hazardous voltage and excessive pressure risks, along with multilingual safety instructions.
Key Features:
- IP54 rated for protection against dust and splashing water.
- Suitable for various pump types: jet, submersible, and reciprocating.
- 1/4" NPT connection for easy integration into plumbing systems.
- Contacts open on rising pressure, ensuring pump shutdown at desired pressure.
4. Specifications
| Specification | Value |
|---|---|
| Model Number | FSG2J21CP |
| Operation Mode | Electrical |
| Current Rating | 30 Amps |
| Operating Voltage | 240 Volts |
| Contact Type | Normally Open |
| Connector Type | Clamp |
| Terminal | Quick-connect |
| Dimensions (L x W x H) | 4 x 4 x 3 inches |
| Circuit Type | 1-way |
| Actuator Type | Diaphragm |
| Contact Material | Brass |
| International Protection Rating | IP54 |
| Item Weight | 0.01 ounces |
| Color | Black |
5. Setup and Installation
Proper installation is crucial for the safe and efficient operation of your pressure switch. Always ensure power is disconnected before beginning.
5.1 Pre-Installation Checklist:
- Verify that the pressure switch specifications match your pump and system requirements.
- Ensure you have the necessary tools (wrenches, wire strippers, screwdriver, thread sealant).
- Confirm the power supply is OFF at the main breaker.
5.2 Installation Steps:
- Mounting: Securely mount the pressure switch in an upright position near the pump or pressure tank. Ensure it is easily accessible for future adjustments and maintenance.
- Plumbing Connection: Apply thread sealant to the 1/4" NPT male threads of the pressure switch. Carefully thread the switch into the appropriate female NPT port on your pump or pressure tank. Tighten securely but do not overtighten.
- Electrical Wiring:
- Remove the cover of the pressure switch.
- Connect the incoming power supply wires to the designated terminals inside the switch. Refer to the wiring diagram provided on the switch's internal label or in your pump's manual for correct connections (typically Line 1, Line 2, and Ground).
- Connect the pump motor wires to the appropriate load terminals.
- Ensure all connections are tight and secure. Use quick-connect terminals where applicable.
- Replace the cover securely.
- System Priming (if applicable): If installing with a new pump or after draining the system, ensure the pump is properly primed according to its manufacturer's instructions before restoring power.
6. Operating Instructions
The Square D Pumptrol pressure switch automatically controls your pump based on system pressure. It is typically factory-set to common pressure ranges (e.g., 30-50 PSI).
6.1 Initial Start-up:
- After installation and ensuring all connections are secure and safe, restore power to the pump system at the main breaker.
- The pump should start and begin to build pressure. Observe the pressure gauge on your system.
- The pump will run until the system pressure reaches the switch's cut-off pressure, at which point the switch will open its contacts and turn off the pump.
- As water is used and system pressure drops to the cut-in pressure, the switch will close its contacts, turning the pump back on.
6.2 Adjusting Pressure Settings:
WARNING: Disconnect power before making any adjustments.
- The pressure switch has adjustment screws, usually located under the cover. One screw adjusts the cut-in pressure (the point at which the pump turns on), and another adjusts the differential (the difference between cut-in and cut-off pressure).
- Turning the main spring adjustment screw (larger spring) clockwise increases both cut-in and cut-off pressures. Turning it counter-clockwise decreases both.
- Turning the differential adjustment screw (smaller spring) clockwise increases the differential (widens the gap between cut-in and cut-off). Turning it counter-clockwise decreases the differential.
- Make small adjustments, then replace the cover, restore power, and observe the system's operation and pressure gauge readings. Repeat until desired settings are achieved.
7. Maintenance
Regular maintenance ensures the longevity and reliable operation of your pressure switch.
- Annual Inspection: At least once a year, with power disconnected, inspect the switch for any signs of wear, corrosion, or damage to the housing or wiring.
- Cleanliness: Keep the exterior of the switch clean and free from dust, dirt, and moisture.
- Connection Check: Periodically check electrical and plumbing connections for tightness. Loose connections can lead to poor performance or safety hazards.
- Diaphragm Check: While power is off, inspect the diaphragm for cracks or hardening. A faulty diaphragm can lead to inaccurate pressure readings.
8. Troubleshooting
Before attempting any troubleshooting, ensure power is disconnected at the main breaker.
| Problem | Possible Cause | Solution |
|---|---|---|
| Pump does not turn on. | No power to switch; faulty wiring; clogged pressure sensing port; worn contacts. | Check circuit breaker; verify wiring connections; clean sensing port; inspect/replace switch if contacts are burnt. |
| Pump runs continuously. | Pressure switch contacts stuck closed; system leak; pump unable to build pressure. | Inspect switch contacts; check for leaks in plumbing; troubleshoot pump (e.g., low water level, faulty check valve). |
| Pump cycles too frequently. | Waterlogged pressure tank; small system leak; pressure switch differential too narrow. | Check and recharge pressure tank air pre-charge; find and repair leaks; adjust pressure switch differential. |
| Inaccurate pressure readings. | Clogged sensing port; faulty pressure gauge; worn diaphragm in switch. | Clean sensing port; verify gauge accuracy; replace switch if diaphragm is faulty. |
If problems persist after troubleshooting, contact a qualified professional or Square D customer support.
9. Warranty Information
Square D products are manufactured to high-quality standards. For specific warranty terms and conditions, please refer to the warranty card included with your product or visit the official Schneider Electric website. Keep your proof of purchase for warranty claims.
10. Support and Contact
For technical assistance, replacement parts, or further inquiries, please contact Square D / Schneider Electric customer support:
- Website: www.se.com/us/en/ (Schneider Electric official website)
- Refer to the product packaging or the Schneider Electric website for specific phone numbers or email contacts for your region.
