Rinnai Water Heater RU180i

Verify that the appliance has been inspected by a licensed professional

Confirm that repairs and maintenance were 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 for lint and dust build-up on the air filter

Inspect the air filter for any visible damage

Contact a trained and qualified professional for a replacement air filter assembly if damaged

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

Ensure discharge has a safe place to flow

Verify no contact with body or property

Confirm testing is performed by a licensed professional

Acknowledge risk of severe burns or death from scalds

Operate the pressure relief valve manually

Check the water heater for any visible signs of damage or leaks.

Is the water heater located in a potentially freezing environment?

Ensure the water heater is manually drained if necessary.

Open the condensate trap drain plug manually.

Open the Pressure Relief Valve manually.

Are drain down solenoid valves installed?