Rinnai Water Heater RUC90i

Turn off the electrical power supply by unplugging the power cord or by turning off the electricity at the circuit breaker.

Turn off the gas at the manual gas valve, usually located immediately below the water heater.

Turn off the incoming water supply at the isolation valve immediately below the water heater or by turning off the water supply to the building.

Ensure the appliance area is clear and free from combustible materials, gasoline, and other flammable vapors and liquids.

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).

Turn off the electrical power supply

Turn off the gas at the manual gas valve

Turn off the incoming water supply

Keep the appliance area clear and free from combustible materials

Pressure Relief Valve Operation

Operate the pressure relief valve manually

Was the discharge area safe and free from hazards?

Turn off the electrical power supply

Turn off the gas at the manual gas valve

Turn off the incoming water supply

Keep the appliance area clear of combustible materials

Close the cold and hot water inlet isolation valves

Place a bucket under the filter to catch water

Turn off the electrical power supply by unplugging the power cord or by turning off the electricity at the circuit breaker.

Turn off the gas at the manual gas valve, usually located immediately below the water heater.

Turn off the incoming water supply at the isolation valve or by turning off the water supply to the building.

Ensure the appliance area is clear and free from combustible materials, gasoline, and other flammable vapors and liquids.

Clean the fan and motor to remove dust and dirt.

Is the area around the appliance clear of all cleaning materials and tools?

Turn off the electrical power supply by unplugging the power cord or by turning off the electricity at the circuit breaker.

Turn off the gas at the manual gas valve, usually located immediately below the water heater.

Turn off the incoming water supply at the isolation valve immediately below the water heater or by turning off the water supply to the building.

Ensure the appliance area is clear and free from combustible materials, gasoline, and other flammable vapors and liquids.

Turn off and disconnect electrical power. Allow to cool.

Close the water shut off valves. Remove and clean the water inlet filter.

Remove the front panel by removing 4 screws.