Bell and Gossett Axiom MF200 System Feeder User Manual

Product Overview

The Axiom MF200 System Feeder, also known as the 'PRESSURE PAL', is engineered for efficient feeding and pressurization of closed hydronic systems. It is designed for systems that do not require cold static fill pressures exceeding 170 kPa (25 psig).

This system feeder is compatible with both water and glycol/water solutions, making it versatile for various applications. It is particularly well-suited for small boiler/chiller systems, snow/ice melt circuits, outside air heating/cooling glycol coils, and solar heating systems.

Figure 1: The Axiom MF200 System Feeder. This image shows the compact, L-shaped green top housing on a translucent white tank. Visible components include a pressure gauge, a brass valve, and a red-capped connection point.

Key Features

• Tank Capacity: Features a 25 liter (6.6 US gallon) tank, ideal for fluid storage and mixing.
• Power Supply: Operates with a standard 115 VAC outlet, ensuring easy integration into most electrical systems.
• Diaphragm Pump: Equipped with a robust diaphragm pump designed to run dry without sustaining damage, enhancing durability.
• Potable Water Isolation: Eliminates the need for backflow prevention devices by avoiding direct connection to potable water supplies.
• Fluid Pre-treatment: Allows for make-up fluid to be pre-treated directly within the feeder tank, simplifying system maintenance.

Setup and Installation

Before beginning installation, ensure all components are present and undamaged. Refer to local codes and regulations for proper installation procedures.

1. Placement: Select a stable, level location for the feeder, ensuring adequate space for access and maintenance.
2. Fluid Preparation: If using a glycol/water solution, prepare the mixture in the 25 liter tank. The tank allows for pre-treatment of make-up fluid.
3. System Connection: Connect the feeder to your closed hydronic system. Ensure all connections are secure and leak-free. The unit is designed to avoid direct connection to potable water, negating the need for backflow prevention.
4. Power Connection: Plug the power supply into a standard 115 VAC outlet.
5. Initial Fill: Follow your system's specific instructions for initial filling and pressurization, utilizing the feeder to maintain the desired cold static fill pressure (up to 170 kPa / 25 psig).

Operating Instructions

The Axiom MF200 System Feeder operates automatically to maintain system pressure once properly installed and configured.

• Monitoring Pressure: Regularly check the pressure gauge on the unit to ensure the system is operating within the desired pressure range.
• Fluid Level: Periodically inspect the fluid level in the translucent tank. Refill as necessary with the appropriate water or glycol/water solution.
• Automatic Operation: The diaphragm pump will automatically activate to add fluid to the system when pressure drops below the set point, and it can run dry without damage.
• System Compatibility: This unit is optimized for small boiler/chiller systems, snow/ice melt circuits, outside air heating/cooling glycol coils, and solar heating systems.

Maintenance

Regular maintenance ensures the longevity and optimal performance of your Axiom MF200 System Feeder.

• Fluid Quality: Ensure the make-up fluid is clean and free of debris. Utilize the pre-treatment capability of the tank if necessary.
• Tank Cleaning: Periodically inspect the tank for sediment or algae buildup. Clean as needed following proper disposal guidelines for any contained fluids.
• Connections: Check all hose and electrical connections for signs of wear, leaks, or corrosion. Tighten or replace as required.
• Pump Inspection: While the diaphragm pump is designed to run dry, regular visual inspection for any unusual noises or performance issues is recommended.

Troubleshooting

This section provides solutions to common issues you might encounter with your system feeder.

• System Not Pressurizing:
  • Check fluid level in the tank.
  • Verify power supply connection.
  • Inspect for leaks in the system or connections.
• Excessive Pump Cycling:
  • Indicates a potential leak in the hydronic system. Inspect all pipes, fittings, and components for fluid loss.
  • Ensure the system's expansion tank is functioning correctly.
• No Power to Unit:
  • Check the power outlet and ensure the power cord is securely plugged in.
  • Verify the circuit breaker has not tripped.

Specifications

Warranty and Support

For specific warranty information and technical support, please refer to the documentation included with your purchase or contact the manufacturer directly. Keep your purchase receipt as proof of purchase.

Manufacturer: MULCAHY COMPANY