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Handling after trial operation
<When Using Anti-Freeze>
• When not planning to use the boiler immediately, close the gas and water shutoff valves to
prevent gas leakage from the boiler.
• Drain a little boiler water from the drainage shutoff valve, check the pressure, then attach the
"CONTAINS ANTI-FREEZE" part of the label to the boiler's front panel.
* When using anti-freeze, we recommend stopping the freeze prevention function.
(See p. 29 "Other Settings")
<When Not Using Anti-Freeze>
• If the unit will not be used immediately, close off all gas and water shutoff valves, drain all of
the water out of the unit and the plumbing system to prevent the unit and system from freezing,
and bleed the gas out of the gas line.
Freezing is not covered by the warranty.
A fire or explosion may result if these instructions are not followed, which may cause lose of
life, personal injury or property damage.
Lighting Instructions
This boiler does not have a pilot. It is equipped with an ignition device that automatically lights the burner.
Do not try to light the burner by hand.
1. Read the safety information in the installation and instruction manual or on the front of the boiler.
2. Turn off all electrical power to the unit.
3. Do not attempt to light the burner by hand.
4. Turn the gas control manual valve (external to the unit) clockwise to the off position.
5. Wait five minutes to clear out any gas. If the smell of gas remains, stop, and follow the instructions
on page 3 of user's information manual.
6. Turn the gas control manual valve counterclockwise to the on position.
7. Turn on electric power to the unit.
8. The unit will now operate whenever hot water is called for. If the unit will not operate, follow the
shutdown instructions and call a service technician.
Shutdown Instructions
1. Stop any water demand.
2. Turn off electric power.
3. Turn the gas control manual valve clockwise to the off position.
Should overheating occur or the gas supply fail to shut off, do not turn off or cut the power supply to the
pump. Instead, close the gas shutoff valve on the outside of the boiler.
Safety shut off
1. Operate the boiler.
2. Close the gas shutoff valve.
3. Check that error message "123" is displayed. (It takes about 90 seconds.)
To clear the error records that occur during trial operation, set the power on/off switch to the off
position and press and hold in the
A beep is sounded and the error records are reset.
CAUTION
WARNING
setting switch on the operation panel for about 5 seconds.
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