Use and Care Manual

58
1) Close the hot water valve and the water
supply valve.
2) With a bucket ready, remove the water drain
valve.
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 Water Heater’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.
Handling after trial operation
• Explain the “Important Safety Information”,
“Operation Procedures” and “Follow-up Service”
according to the Owner's Guide supplied with the
Water Heater.
• If the Water Heater will not be used immediately,
close off all gas and water shut off valves, drain
all of the water out of the Water Heater and the
plumbing system to prevent the Water Heater
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
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.
This Water Heater 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 Water Heater.
2. Turn off all electrical power to the Water Heater.
3. Do not attempt to light the burner by hand.
4. Turn the gas control manual valve (external to
the Water Heater) 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 Water
Heater.
8. The Water Heater will now operate whenever
hot water is called for. If the Water Heater 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
5) Open the hot water valve and the water
supply valve.
Check that water does not leak from the
water drain valve.
3) Clean the water filter with a brush under
running water.
4) Reattach the water drain valve (with water
filter).
NOTE
Do not to lose the O-Ring.
NOTE
Approximately 0.83 gallon (3.1 L) of
water will drain out.
O-Ring
Water drain valve
with water filter
Hot water valve
Water supply
valve
Trial Operation