Rinnai Water Heater CU160i

Check for lint and dust build-up on the air filter

Inspect the air filter for any visible damage

Clean the air filter if lint and dust build-up is present

Contact a trained and qualified professional if the air filter is damaged

Verify that the appliance is inspected by a licensed professional

Confirm repairs and maintenance are performed by a licensed professional

Verify proper operation after servicing

Inspect the vent system for blockages or damage

If the vent is blocked, contact a licensed professional

Clean the fan and motor to keep them free of dust and dirt

Check the water heater for any visible signs of damage

Ensure the water lines are insulated

Refer to the 'Freeze Protection' section in the manual

Manually drain the water heater if necessary

Verify the installation of drain down solenoid valves

Check if the drain down solenoid valves are functioning properly

Check that the burner flames evenly over the entire surface

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

Compare the flame pattern to the images on p. 66

Locate the view ports using the parts breakdown of the burner

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