HTP CG300N65 User Manual
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LP-436 REV. 3.21.14
Hydrogen gas can be produced in a hot water system that has not been used for a long period of time (generally 2 weeks or more).
HYDROGEN GAS IS EXTREMELY FLAMMABLE. It is highly recommended to open the hot water faucet in the kitchen for several
minutes before you use any electrical appliances connected to the hot water system, such as a dishwasher or washing machine. If
hydrogen gas is present, there will be an unusual sound, such as air escaping through the pipe, as the hot water faucet is opened. DO
NOT smoke or introduce an open flame near the faucet when it is opened.
Draining the Water Heater
To completely drain the water heater:
1. Turn off gas to the appliance (refer to Turn Off Gas to Appliance).
2. Close the gas supply manual shut-off valve.
3. Close the cold water supply manual shut-off valve.
4. Connect one end of a garden hose to the water heater drain valve and put the other next to a free flowing drain.
5. Open the drain valve by turning the knob counterclockwise.
6. Open a hot water faucet to allow air into the system.
Vacation
If you are planning a vacation or other prolonged absence, it is highly recommended to shut off the gas supply and the cold water
supply to the water heater. This will save energy, protect against property damage in the event the water heater leaks, and prevent the
build-up of hydrogen gas. The water heater and piping should be drained if exposed to freezing temperatures.
Remember to check the water heater thoroughly after it has been shut off for an extended period of time before putting it back in
operation. Make sure that the water heater is completely full of water and that the cold water supply manual shut-off valve is open
before lighting the burner.
Getting Service for your Water Heater
If you are having problems with your water heater, follow these two easy steps:
1. Consult the Troubleshooting Guide in this manual. It will guide you to the most common problems experienced with a gas-
fired water heater. The solutions you find listed may provide a quick and simple solution to your problem and save time and
money.
2. If the solution listed in the Troubleshooting Guide does not solve the problem, or if your particular problem does not appear
in the guide, contact the installer of the water heater, or the local gas utility.