•Disconnect the hoses joining the tank and the heat engine (upper hose is water outlet and lower hose is water inlet).
•Connect addition length of hose (not provided) to existing hoses. (Note: The heat engine hose is a 3/4” NPT thread which is different for a garden hose thread.)
5 gallon pail of virgin, food grade, white vinegar (or virgin, food grade,
citric acid).
Hot Water
Line
Heat
Engine
•Reconnect the original hoses to the tank.
•Remove the
•Open the shutoff valves on both the hot water and cold water lines.
•Fill the tank with water.
•Connect the electrical power to the water heater.
•Restart water heater following lighting instructions.
DRAINING THE TANK
Cold Water
Line
FIGURE 40
•Connect a pump to the hose running to the heat engine water inlet (lower fitting). We recommend a submersible utility pump for the circulating pump. (Note: If a submersible pump is not used, connect a hose from the circulating pump to the cleaning solution.)
•Pour approximately 4 gallons (15 litres) of virgin, food grade, white vinegar or citric acid into a 5 gallon or greater pail.
•Place the “intake” and “output” hoses into the pail of cleaning solution. If a submersible utility pump is used, place the pump into the pail of cleaning solution.
•Plug in the circulating pump.
•Connect the electrical power to the water heater and run the heat engine.
•Operate the heat engine to circulate the cleaning solution through the system for at least 45 minutes. (Note: Lower the temperature below 104°F (40°C) or to vacation mode.) Warning: Water will become hot very quickly.
•Disconnect electrical power to the water heater.
•Remove the pail of cleaning solution and replace it with a pail of clean water.
•Rinse the cleaning solution from the water heater as follows:
•Connect the electrical power to the water heater and run the heat engine.
•Allow the clean water to flow through the heat engine for 5 minutes.
•Disconnect electrical power to the water heater and circulating pump.
•Disconnect the hoses from the heat engine.
•Disconnect hoses and circulating pump, draining the cleaning solution into the pail.
The water heater should be drained if being shut down during freezing temperatures. Also periodic draining and cleaning of sediment from the tank may be necessary.
1.Set the power switch to the “OFF” position.
2.OPEN a nearby hot water faucet and let the water run until it is no longer hot.
3.CLOSE the cold water inlet valve to the water heater.
4.Connect a hose to the drain valve and terminate to an adequate drain.
5.OPEN the water heater drain valve to allow for tank draining. NOTE: If the water heater is going to be shut down and drained for an extended period, the drain valve should be left open with hose connected allowing water to terminate to an adequate drain.
6.CLOSE the drain valve.
7.Follow instructions in the “Filling The Water Heater” section.
8.Follow the lighting instructions on the label or see “Lighting Instructions” in this manual to restart the water heater.
FAULT INDICATION AND ERROR CODES
A red fault LED (lighting a large red exclamation point) should be present on the display panel if a fault condition exists.
A history of the last 9 error codes along with the current error code is stored in memory and can be accessed via the maintenance mode. If the current error code is zero, “E00” shall be displayed (see Table 4).
46www.americanwaterheater.com