User Manual for RUUD Tankless Water Heater

Important Information

This manual provides essential instructions for the installation, operation, and maintenance of RUUD non-condensing tankless water heaters. Always read and obey all safety messages. Installation and service must be performed by a qualified installer or service agency.

Safety Precautions

• Gas Leaks: If you smell gas, do not light any appliance, do not touch electrical switches, and do not use phones in the building. Call your gas supplier immediately from a neighbor's phone.
• Flammable Materials: Do not store gasoline or other flammable vapors/liquids near the water heater.
• Scalding: Water temperatures above 125°F (52°C) can cause severe burns. Use caution when setting temperatures.

Installation

Choosing a Location

The water heater must be installed in an area where it will not sustain damage from moving vehicles or flooding. Ensure proper clearances from combustible materials. Do not install in areas with corrosive air (e.g., beauty shops, photo labs).

Venting

Direct-vent models must be vented to the outdoors using 3-in./5-in. diameter UL-approved Category III Stainless Steel vent pipe. Do not use other materials. Ensure proper support for vent runs and maintain required clearances.

Gas Supply

Gas piping must conform to local codes and the National Fuel Gas Code. Ensure the gas meter and piping are sized correctly for the total BTU load of all appliances. Perform leak testing using a soapy water solution; never use an open flame.

Water Supply

Use clean, potable water. Inlet water temperatures must be between 32°F (0°C) and 120°F (49°C). Install a pressure-relief valve at the hot water outlet. Insulate both hot and cold water supply lines to prevent freezing.

Electrical Wiring

The unit requires a 120 VAC/60 Hz, 2 Amp power supply. A dedicated circuit is recommended. Do not use 3-prong to 2-prong adapters.

Operation

The water heater is activated by water flow. Use the remote control to set the desired water temperature. The temperature range is 100°F to 120°F (38°C to 49°C), with adjustments up to 140°F (60°C) possible for residential applications by a qualified technician.

Maintenance

• Annual Inspection: Have a qualified technician inspect the venting system, burner, and condensate trap annually.
• Water Filter: Clean the water filter monthly.
• Draining: If the unit will be idle in freezing conditions, drain the water heater completely to prevent damage.

Troubleshooting

If the unit fails to operate, check the troubleshooting chart for common issues like frozen pipes, closed valves, or clogged filters. Error codes displayed on the remote control indicate specific problems; refer to the Service Error Code Chart for solutions.