72
Shutdown Instructions
1. Stop any water demand.
2. Turn off the electrical power.
3. Turn the gas control manual valve clockwise to
the off position.
2. Turn off all electrical power to the Combi Boiler.
3. Do not attempt to light the burner by hand.
4. Turn the gas control manual valve (external to
the Combi Boiler) 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 Owner's Guide.
6. Turn the gas control manual valve
counterclockwise to the on position.
7. Turn on the electrical power to the Combi Boiler.
8. The Combi Boiler will now operate whenever
hot water is called for. If the Combi Boiler will
not operate, follow the shutdown instructions
and call a service technician.
A fire or explosion may result if these
instructions are not followed, which may cause
lose of life, personal injury or property damage.
WARNING
Lighting Instructions
Handling after trial operation
• Explain the “Important Safety Information”,
“Operation Procedures” and “Follow-up Service”
according to the Owner's Guide supplied with the
Combi Boiler.
• If the Combi Boiler will not be used immediately,
close off all gas and water shut off valves, drain
all of the water out of the Combi Boiler and the
plumbing system to prevent the Combi Boiler and
system from freezing, and bleed the gas out of
the gas line.
Refer to the procedure for preventing damage
from freezing in the Owner’s Guide.
Freezing is not covered by the Noritz America
Limited Warranty.
NOTICE
If error codes “11”, “12”, and “90” appear, check
the following contents.
[“11”: Ignition failure, “12”: Flame loss]
• Check that the gas supply line is appropriately
sized.
• Check that the gas supply pressure is within the
ranges required in this manual.
• Check that the gas supply matches the type
indicated on the Combi Boiler’s rating plate.
• Air may be left in the gas piping. Cycle the power
ON/OFF.
• Check that the settings of all DIP switches are
appropriate.
[“90”: Combustion abnormality]
• Check that the air supply / exhaust vent for
blockage.
• Check that the gas supply pressure is within the
ranges required in this manual.
• Check that the condensate piping is not frozen or
clogged.
• Check that the condensate piping is in a
downward slope.
• Check that the settings of all DIP switches are
appropriate.
This Combi 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
manual or on the front of the Combi Boiler
Water Filling and Trial Operation