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® UNSATISFACTORY Gas <br /> Shut off the gas to the water heater. It is generally <br /> FRONT VIEW preferable to shut off the gas service to the entire <br /> location if gas is not going to be used. <br /> Water <br /> Flame Rod • Shut off the cold water supply to the water <br /> heater. It is generally preferable to shut off <br /> the water to the entire location if water is <br /> not going to be used. <br /> Figure 80 Yellow Flame • Drain the water heater by opening the <br /> drain valves on the cold water line and hot <br /> water line. <br /> • Open several hot water taps and remove <br /> FREEZE PROTECTION the filter assembly at the water inlet in <br /> order to allow room for expansion in case <br /> Make sure in case of freezing weather that the there is water in the lines that freeze. <br /> water heater and its water lines are adequately <br /> protected to prevent freezing. Damage due to Condensate <br /> freezing is not covered by the warranty. Refer <br /> to the "Freeze Protection" section (Section Drain the condensate using the condensate drain <br /> 4.3 Choose an Installation Location > Freeze port on the bottom of the water heater. <br /> Protection). The water heater may be drained Electric <br /> manually. However, it is highly recommended that <br /> drain down solenoid valves be purchased and Disconnect the power supply by either unplugging <br /> installed, which will automatically drain the water the electrical cord or by turning off the circuit <br /> heater if power is lost. (The condensate trap drain breaker to the water heater to prevent potential <br /> plug and Pressure Relief Valve are not affected by damage from irregular power surges or <br /> the auto drain down solenoid valves and will have interruptions. <br /> to be manually opened.) <br /> WINTERIZATION <br /> The following recommendations are intended to 6.2 Cleaning and <br /> suggest practices that are effective for winterizing <br /> the water heater. They should be used as a Inspecting the Air <br /> guide only. No liability is assumed for any issues <br /> resulting from the use of this information. <br /> Note: See section "6.4 Draining the Water Heater" Filter (Indoor Units <br /> for detailed instructions on: <br /> • Draining the water heater only) <br /> • Running a low volume of water through the <br /> water heater to prevent freezing INSPECTION <br /> • Steps to take when the water heater or <br /> external pipes have frozen To maintain optimum performance, <br /> periodically inspect the air filter. <br /> • If the air filter appears to have lint and/or <br /> dust build up, follow the cleaning <br /> procedure described below. <br /> • If the air filter appears damaged, contact <br /> a trained and qualified professional for a <br /> replacement air filter assembly. <br /> Rinnai Tankless Water Heater Installation and Operation Manual 82 <br />