Rinnai Water Heater RU130i

Turn off power at the controller

Disconnect electrical power to the water heater

Close the shutoff valves on both the hot water and cold water lines (V3 and V4)

Connect pump outlet hose (H1) to the cold water line at service valve (V2)

Connect drain hose (H3) to the hot water line at service valve (V1)

Pour four gallons of undiluted virgin, food grade, white vinegar into pail

Push the 'On/Off' button located on the right-hand side of the controller

Remove four screws securing the front panel

Remove the front panel and locate the filter at the upper right-hand corner of the water heater

Remove the air filter by pulling out the 'FILTER Pull to Clean' tab

Scrub the filter area of the air filter door with mild dish soap and a soft bristle brush

Check if the water heater is located in a freezing-prone area

Is the water heater equipped with drain down solenoid valves?

Manually drain the water heater if solenoid valves are not installed

Open the condensate trap drain plug manually

Open the Pressure Relief Valve manually

Is the water heater adequately protected against freezing?

Check that the burner flames evenly over the entire surface

Verify the flame burns with a clear, blue, stable flame

Consult the parts breakdown of the burner for the location of the view ports

Compare the flame pattern with the images on p. 66

Check for lint build-up on the air filter

Check for dust accumulation on the air filter

Inspect the air filter for any visible damage

Remove the air filter from the assembly

Clean the air filter using appropriate cleaning tools

Reinstall the air filter into the assembly