KolerFlo RS15-6 Hot Water Recirculating Pump Instruction Manual

1. Introduction

This manual provides essential information for the safe and efficient installation, operation, and maintenance of your KolerFlo RS15-6 Hot Water Recirculating Pump. Please read these instructions thoroughly before installation and use, and retain them for future reference.

2. Safety Information

WARNING: Improper installation, operation, or maintenance can cause serious injury or property damage. Always follow local codes and regulations. Installation should be performed by a qualified professional.

• Disconnect power before servicing.
• Do not run the pump dry.
• Ensure proper grounding to prevent electrical shock.
• Wear appropriate personal protective equipment during installation and maintenance.
• This pump is designed for hot water circulation in domestic water heater systems. Do not use for other liquids or applications.

3. Product Overview

The KolerFlo RS15-6 is a hot water recirculating pump designed to provide instant hot water, reduce water waste, and improve comfort in your home. It features a durable stainless steel head and a three-speed control for adjustable performance.

3.1 Components

Figure 1: Key components of the KolerFlo RS15-6 pump, including the junction box, water intake, outlet, exhaust screw, and speed regulation switch.

• Pump Head: Stainless steel for corrosion resistance.
• Pump Housing: Aluminum construction.
• Impeller: Corrosion-resistant composite (PES).
• Motor: Efficient and quiet operation.
• Three-Speed Control Switch: Allows adjustment of flow rate and head.
• Junction Box: Protects electrical connections.
• Exhaust Screw: For bleeding air during initial setup.
• Inlet/Outlet: 3/4 inch NPT connections.

3.2 Dimensions

Figure 2: Physical dimensions of the pump: 8.9"L x 6.8"W x 7.1"H.

3.3 Performance Curve

Figure 3: Performance curve illustrating the relationship between flow rate, head, and power consumption at different speed settings.

4. Setup and Installation

Before beginning installation, ensure all necessary tools and materials are available. Refer to local plumbing and electrical codes.

4.1 Unpacking

Figure 4: Contents of the product package, including the recirculating pump, water-stop, and instruction manual.

Carefully remove the pump and all accessories from the packaging. Verify that all components are present and undamaged:

• KolerFlo RS15-6 Recirculating Pump
• Water-stop (gaskets/seals)
• Instruction Manual (this document)

4.2 Placement

Install the pump in a location that is easily accessible for maintenance and protected from freezing temperatures. The pump should be installed on the hot water line, typically near the water heater or at the furthest fixture from the water heater, depending on the system design.

Figure 5: Example installation of the recirculating pump on a water heater system.

4.3 Plumbing Connections

The pump features 3/4 inch NPT inlet and outlet connections. Use appropriate brass fittings and thread sealant (e.g., PTFE tape) to ensure leak-free connections. The direction of water flow is indicated by an arrow on the pump housing.

Figure 6: Water outlet direction indicated on the pump body.

1. Shut off the main water supply and drain the hot water line.
2. Connect the pump to the hot water line using appropriate fittings. Ensure the flow arrow on the pump aligns with the direction of hot water circulation.
3. Tighten all connections securely, but do not overtighten.
4. Slowly open the main water supply and check for leaks.

4.4 Electrical Connections

The pump operates on 110-120V, 60Hz AC power. Ensure the power supply matches the pump's requirements. Connect the pump to a grounded outlet.

• Ensure the power cord is not pinched or damaged.
• If using a smart plug or timer, ensure it is rated for the pump's wattage (max 93W).

5. Operation

Once installed and connected, the pump is ready for operation.

5.1 Initial Start-up and Air Bleeding

1. Ensure the system is filled with water and all valves are open.
2. Turn on the power to the pump.
3. Carefully open the exhaust screw on the front of the pump (refer to Figure 1) to release any trapped air. Close the screw once a steady stream of water emerges.
4. The pump may make some noise initially as air is purged from the system. This should subside.

5.2 Speed Control

Figure 7: The three-speed control switch (1, 2, 3) allows adjustment of pump performance.

The KolerFlo RS15-6 pump features a three-speed control switch (1, 2, 3) located on the junction box. Each setting corresponds to a different flow rate, head, and power consumption:

• Setting 1 (Low): 46W, 13 ft (4 m) max head, 20 LPM (5.28 GPM) flow.
• Setting 2 (Medium): 67W, 16 ft (4.9 m) max head, 29 LPM (7.66 GPM) flow.
• Setting 3 (High): 93W, 20 ft (6 m) max head, 36 LPM (9.5 GPM) flow.

Select the speed setting that best suits your system's requirements for hot water circulation. Higher settings provide faster circulation but consume more power.

5.3 Benefits of Recirculation

Figure 8: Visual representation of improved water flow and faster hot water delivery with the recirculating pump.

The recirculating pump ensures hot water is readily available at your fixtures, reducing the waiting time and conserving water that would otherwise be wasted while waiting for hot water to arrive.

6. Maintenance

Regular maintenance ensures optimal performance and extends the lifespan of your pump.

• Annual Inspection: Check for any signs of leaks, corrosion, or unusual noises.
• Cleaning: Keep the exterior of the pump clean and free from debris.
• Air Bleeding: If the pump runs noisily or experiences reduced flow, re-bleed the air from the system as described in Section 5.1.
• Winterization: If the pump is installed in an unheated area, drain the system to prevent freezing damage during cold weather.

7. Troubleshooting

Refer to the table below for common issues and their solutions.

If the problem persists after attempting these solutions, contact customer support or a qualified technician.

8. Technical Specifications

9. Warranty and Support

For warranty information or technical support, please contact KolerFlo customer service. Keep your purchase receipt as proof of purchase.

Visit the KolerFlo Store on Amazon for more products and information.