1. Introduction
This manual provides essential information for the proper installation, operation, and maintenance of your Taco 0015-MSF3-IFC 3-Speed Cast Iron Circulator Pump. Please read these instructions thoroughly before proceeding with installation or operation to ensure safe and efficient performance.
The Taco 0015-MSF3-IFC is a high-efficiency, three-speed circulator designed for hydronic heating and cooling systems. It features an Internal Flow Check (IFC) to prevent gravity flow and simplify installation.
2. Safety Information
WARNING: Risk of Electric Shock. Disconnect power before servicing.
WARNING: Risk of Burns. Pump and piping may be hot. Allow to cool before handling.
- Ensure all electrical wiring is performed by a qualified electrician and complies with local codes and regulations.
- Verify that the power supply matches the pump's voltage requirements (115 Volts).
- Do not operate the pump without water in the system. Dry running can cause severe damage.
- Wear appropriate personal protective equipment (PPE) during installation and maintenance.
- Keep children and unauthorized personnel away from the pump during operation.
3. Setup and Installation
Proper installation is crucial for the longevity and efficiency of your circulator pump.
3.1 Unpacking
Carefully remove the circulator from its packaging. Inspect for any visible damage. Report any damage to the carrier immediately.
3.2 Mounting
The circulator can be mounted in any position, provided the motor is horizontal. Ensure adequate space for wiring and future maintenance.

Image Description: A side view of the Taco 0015-MSF3-IFC circulator pump, showing the cast iron pump body and the motor housing. This view illustrates the typical orientation for installation within a piping system.
3.3 Piping Connections
The circulator is designed for use with standard flanges. Ensure all connections are tight to prevent leaks. Use appropriate pipe dope or Teflon tape on threaded connections.

Image Description: A view of the Taco 0015-MSF3-IFC circulator pump from an angle, highlighting the flange connections on both sides of the pump body. This shows where the pump connects to the system's piping.
3.4 Electrical Wiring
The circulator requires a 115 Volt AC power supply. Refer to the wiring diagram located inside the terminal box cover. Ensure proper grounding.

Image Description: An internal view of the Taco 0015-MSF3-IFC circulator pump's electrical compartment, showing the wiring connections. This image is for reference during electrical installation, emphasizing the importance of correct wiring.
- Turn off the main power supply to the circuit before beginning any wiring.
- Remove the terminal box cover.
- Connect the power supply wires to the appropriate terminals as indicated by the internal diagram.
- Secure all connections and replace the terminal box cover.
4. Operating Instructions
The Taco 0015-MSF3-IFC circulator features three speed settings, allowing for optimization of system performance and energy consumption.

Image Description: A front view of the Taco 0015-MSF3-IFC circulator pump, clearly showing the product label with specifications and the speed selector switch. The label details voltage, frequency, max pressure, max water temperature, and power consumption for each of the three speeds.
4.1 Speed Selection
A selector switch on the motor housing allows you to choose between three operating speeds (1, 2, or 3). Refer to the product label for specific wattage and amperage ratings for each speed.
- Speed 1: Lowest flow and head, lowest power consumption.
- Speed 2: Medium flow and head, moderate power consumption.
- Speed 3: Highest flow and head, highest power consumption.
Select the speed that best matches your system's requirements for optimal performance and energy efficiency.
4.2 Internal Flow Check (IFC)
The integrated IFC eliminates the need for an external check valve, preventing gravity circulation in hydronic systems when the pump is off. This feature is automatic and requires no user intervention.
4.3 Initial Start-up
- Ensure the system is filled with water and properly vented to remove all air.
- Verify all electrical connections are secure.
- Turn on the power supply to the circulator.
- Observe the pump for smooth operation and check for any leaks.
5. Maintenance
The Taco 0015-MSF3-IFC circulator is designed for continuous duty and requires minimal maintenance. However, periodic checks can extend its lifespan.
- Annual Inspection: Check for any signs of leaks around the flanges or motor housing.
- Noise Check: Listen for unusual noises, which could indicate bearing wear or cavitation.
- System Water Quality: Maintain proper system water quality to prevent corrosion and scale buildup, which can affect pump performance.
- Cleaning: Keep the exterior of the pump clean and free of dust and debris to ensure proper heat dissipation.
6. Troubleshooting
Refer to the following table for common issues and their potential solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Pump does not start | No power; Blown fuse/tripped breaker; Motor seized | Check power supply; Reset breaker/replace fuse; Contact qualified service personnel. |
| Pump runs but no flow | Air in system; Closed isolation valves; Clogged impeller | Vent system; Open valves; Inspect/clean impeller (requires professional service). |
| Excessive noise/vibration | Air in system; Cavitation; Worn bearings; Improper mounting | Vent system; Ensure adequate system pressure; Contact qualified service personnel; Check mounting. |
| Leaking from pump | Loose flange connections; Damaged gasket/seal | Tighten flange bolts; Replace gasket/seal (requires professional service). |
If troubleshooting steps do not resolve the issue, contact a qualified HVAC technician or Taco customer support.
7. Specifications
- Model: 0015-MSF3-IFC
- Brand: Taco
- Material: Cast Iron
- Horsepower: 1/20 HP
- Voltage: 115 Volts
- Frequency: 60 Hz
- Speeds: 3 (Selectable)
- Max Pressure: 125 PSI
- Max Water Temperature: 110°C / 230°F
- Internal Flow Check (IFC): Yes
- Enclosure Type: 2
- Duty: Continuous Duty
- Item Weight: Approximately 7 Pounds
- UPC: 687752908343
8. Warranty and Support
For warranty information, please refer to the documentation provided with your purchase or contact Taco, Inc. directly. Warranty terms typically cover manufacturing defects for a specified period from the date of manufacture or purchase.
Manufacturer: Taco, Inc.
Contact: Please visit the official Taco, Inc. website for current contact information and technical support resources.





