Watts Heat H2O 0955805 Hot Water Recirculation System User Manual

Introduction

The Watts Heat H2O Hot Water Recirculation System is designed to provide instant hot water to your faucets and showers. This system utilizes thermal bypass technology to circulate water, eliminating the wait for hot water and conserving water resources. It features a programmable timer for efficient operation and is intended for use with tank water heaters.

Image: The Watts Heat H2O Hot Water Recirculation System pump with its integrated programmable timer.

Safety Information

• Read all instructions carefully before installation and operation.
• Ensure all water and electrical connections are performed by qualified personnel if you are unsure.
• Turn off the main water supply and electrical power to the water heater before beginning installation.
• This system is designed for indoor use only.
• Do not use with tankless water heaters.

Components Included

The Watts Heat H2O Recirculation System includes the following components for installation:

• Heavy-duty stainless steel pump head in aluminum housing with 10 ft cord
• 2 adapters with rubber washers
• Thermostatically controlled sensor valve
• Mounting screws
• Two 12-inch supply lines

Image: Contents of the Watts Heat H2O Recirculation System kit, including the pump, sensor valve, mounting screws, and supply lines.

Setup and Installation

The Watts Heat H2O system is designed for easy DIY installation into existing plumbing. The installation involves two main parts: the pump near the water heater and the sensor valve under the sink.

General Installation Notes:

• No return line or additional electricity under the sink is required.
• The system operates on 120V.
• This system is only compatible with tank water heaters. It is not designed for tankless water heaters.

Image: Illustration emphasizing that the Watts Heat H2O system is designed exclusively for tank water heaters.

Pump Installation (Near Water Heater):

1. Turn off the water supply and power to your water heater.
2. Drain a small amount of water from the hot water line to relieve pressure.
3. Install the pump directly to the hot water outlet of your water heater.
4. For water heaters with rigid, non-movable water supply pipes, additional tools may be required for installation.
5. Water heaters with a flexible water supply line allow for simple DIY installation without additional tools. (Note: A flexible water heater supply line is not included).

Image: Visual guide comparing installation methods for flexible and rigid water heater supply lines.

Sensor Valve Installation (Under Sink):

1. Locate the hot and cold water supply lines under the sink furthest from the water heater.
2. Install the sensor valve between the hot and cold water supply lines using the provided flexible hoses and mounting screws.
3. Ensure all connections are tight to prevent leaks.

Image: A diagram showing the complete installation of the recirculation pump near the water heater and the sensor valve under the sink.

Installation Video Resources:

Operating Instructions

The Watts Heat H2O system features a built-in programmable timer to customize its operation according to your household's hot water usage patterns.

Setting the Programmable Timer:

1. The 24-hour dial has quarter-hour division tabs and AM/PM indications.
2. Push the tabs inward for the periods you want the pump to operate (ON).
3. Leave the tabs outward for the periods you want the pump to be inactive (OFF).
4. You can set the timer to run for 24 hours a day or activate only during peak use times to conserve energy.

Image: The Watts Heat H2O pump with its programmable timer, illustrating how to schedule operation for hot water when needed.

Image: Detailed view of the programmable timer dial on the Watts Heat H2O pump, showing the quarter-hour segments.

System Operation:

• When the pump is active (according to the timer), the sensor valve opens if the water on the hot water side cools below 98°F.
• Cool water is then pushed back to the water heater through the cold water supply line.
• The sensor valve closes once the hot water line reaches 98°F, ensuring hot water is readily available.

Maintenance

Once installed, the Watts Heat H2O Hot Water Recirculation System requires no routine maintenance. Its durable construction and design ensure reliable operation without the need for regular servicing.

Troubleshooting

If you experience issues with your Watts Heat H2O system, consider the following:

• No Hot Water:
  • Check if the pump is receiving power and the timer is set correctly to an "ON" period.
  • Ensure the water heater is functioning properly and supplying hot water.
  • Verify that the sensor valve is correctly installed and not obstructed.
• Water Not Hot Enough:
  • Confirm the water heater temperature setting is adequate.
  • Allow sufficient time for the system to circulate water, especially after initial setup or extended idle periods.
• Leaks:
  • Inspect all connections for tightness. Turn off water supply before tightening.
  • Check rubber washers for proper seating and damage.

For persistent issues, contact Watts Premier customer support.

Specifications

Image: The Watts Heat H2O pump with its physical dimensions indicated.

Warranty and Support

Warranty Information:

This Watts Heat H2O Hot Water Recirculation System includes a 3-year warranty. For specific terms and conditions, please refer to the warranty documentation included with your product or contact Watts Premier customer service.

Optional protection plans are available for extended coverage:

• 3-Year Protection Plan
• 4-Year Protection Plan
• Complete Protect (monthly renewal)

Customer Support:

For technical assistance, replacement parts, or warranty claims, please contact Watts Premier customer support through their official website or the contact information provided in your product packaging.