Noritz NRC111-SV User manual

SBA8370
Rev. 09/09
Models: NRC111-SV
NRC111-DV*
CONDENSING TANKLESS GAS WATER HEATER
Owner’s Guide
NORITZ America Corporation
Low NOx
Approved by
SCAQMD
CERTIFIED
R
- Do not store or use gasoline or other flammable vapors and liquids in the
vicinity of this or any other appliance.
-WHAT TO DO IF YOU SMELL GAS
•Do not try to light any appliance.
• Do not touch any electrical switch; do not use any phone in your building.
• Immediately call your gas supplier from a neighbor’s phone. Follow the
gas supplier’s instructions.
•If you cannot reach your gas supplier, call the fire department.
- Installation and service must be performed by a qualified installer, service
agency or the gas supplier.
If the information in this manual is not followed exactly, a fire or explosion
may result causing property damage, personal injury, or death.
WARNING
Thank you for purchasing this Noritz Tankless Gas Water Heater.
Before using, please:
Read this manual completely for operation instructions.
Completely fill out the warranty registration card (included separately) and
mail the detachable portion to Noritz America Corporation.
Keep this manual (and the remainder of the warranty registration card) where it
can be found whenever necessary.
Installation must conform with local codes, or in the absence of local codes,
the National Fuel Gas Code, ANSI Z223.1/NFPA 54.
When applicable, installation must conform with the Manufactured Home
Construction and Safety Standard, Title 24 CFR, Part 3280 or the Canadian
Standard CAN/CSA-Z240 MH Mobile Homes, Series M86 (NRC111-DV only).
Noritz America reserves the right to discontinue, or change at any time, the
designs and/or specifications of its products without notice.
* FOR USE IN RESIDENTIAL, COMMERCIAL, OR MANUFACTURED HOME APPLICATIONS.
Accepted For Use
City of New York
Department of Buildings
MEA 19-03-E
*SBA8370*

2
Prohibited Don’t
touch.
Don’t
disassemble
the equipment.
Don’t touch
with a wet
hand.
No flame.
High
Temperature.
To prevent damage to property and injury to the user, the icons shown below will be used to warn of
varying levels of danger.
Every indication is critical to the safe operation of the water heater and must be understood and observed.
Potential dangers from accidents during installation and use are divided into the following four
categories. Closely observe these warnings; they are critical to your safety.
Other icons
DANGER
WARNING
CAUTION
DANGER indicates an imminently hazardous situation which,
if not avoided, will result in death or serious injury.
WARNING indicates a potentially hazardous situation which, if not
avoided, could result in death or serious injury.
CAUTION indicates a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury.
CAUTION used without the safety alert symbol indicates a potentially
hazardous situation which, if not avoided, may result in property damage.
CAUTION
Be sure
to do. Ground.
Electric
Shock.
DANGER
Icons warning of risk level
Important Safety Information-1
This is the safety alert symbol. It is used to alert you to potential personal injury hazards.
Obey all safety messages that follow this symbol to avoid possible injury or death.
Vapors from flammable liquids will explode and catch fire causing death or severe burns.
Do not use or store flammable products such as gasoline, solvents or
adhesives in the same room or area near the water heater.
Prohibited
Keep flammable products:
1. Far away from the water
heater.
2. In approved containers.
3. Tightly closed.
4. Out of children’s reach.
Vapors:
1. Cannot be seen.
2. Vapors are heavier than air.
3. Go a long way on the floor.
4. Can be carried from other rooms
to the main burner by air currents.
Hot Water Heater temperatures over 125 F can cause severe burns instantly or
death from scalding.
Children, disabled and elderly are at the highest risk of being scalded.
Feel water temperature before bathing or showering.
Temperature limiting valves are available, ask professional person.
Prohibited
(Continued)

3
No flame.
(Continued)
[NRC111-SV only]
Do not use the water heater
if the exhaust pipe
is displaced,
has holes, is clogged
or is corroded.
Prohibited
Be sure
to do.
When a gas leak is noticed:
1. Stop use immediately
2. Close the gas valve
3. [When installing indoors]
Open windows and doors
If you detect abnormal combustion
or abnormal odors, or during an
earthquake, tornado or fire:
1. Turn off the hot water supply
2. Turn off the power to the water heater
3. Turn off gas and water supply valve.
4. Call the nearest Noritz agent
Be sure
to do.
Do not allow anyone to change the water
temperature while hot water is being used.
To prevent scalding, do not change the wa-
ter temperature to a higher setting.
Prohibited
Explosion Hazard ;
If the temperature and pressure relief
valve is dripping or leaking, have a
qualified service technician replace it.
Do not plug or remove the valve.
Failure to follow these instructions can result in
fire or explosion, and personal injury or death.
Prohibited
After the water heater has been out of use
for a long time or after replacing the neu-
tralizer with a new unit, make sure that
you fill the neutralizer unit with water.
This is to prevent dangerous exhaust
gases from entering the building.
Failure to fill the neutralizer unit could
result in severe personal injury or death.
(Refer to page 20 for further instructions.)
Be sure
to do.
[NRC111-DV only]
Do not use the water
heater if the
intake/exhaust pipe
is displaced, has
holes, is clogged
or is corroded.
Prohibited
(Continued)
Check the temperature
of the running hot water
before entering the
shower.
Check the temperature
before stepping into
the bath tub.
High
Temperature.
A. 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.
B. BEFORE OPERATING smell all
around the water heater area for
evidence of leaking gas. Be sure
to smell next to the floor because
some gas is heavier than air and
will settle on the floor.
WHAT TO DO IF YOU SMELL GAS.
• Do not try to light any
appliance.
• Do not touch any electrical
switch; do not use any phone
in your building.
• Immediately call your gas
supplier from a neighbor’s
phone. Follow the gas supplier’s
instructions.
• If you cannot reach your gas
supplier, call the fire department.
C. Use only your hand to turn the
gas valve knob. Never use tools.
If the knob will not turn by hand,
don’t try to repair it. Call a
qualified service technician.
Force or attempted repair may
result in a fire or explosion.
D. Do not use this water heater if
any part has been under water.
lmmediately call a qualified
service technician to inspect the
water heater and to replace any
damaged parts.
Do not use combustible chemicals such
as oil, gasoline, benzene etc. in the near
the heater or the exhaust vent terminal.
Prohibited
WARNING

4
Important Safety Information-2
(Continued)
Be sure the gas/power
supplied matches the
gas on the rating plate.
Ex. For Natural Gas NRC111-SV
Be sure
to do.
Do not place the exhaust vent terminal
in an indoor environment by means of
adding walls and ceiling (Do not en-
close using corrugated sheets, etc.)
Carbon monoxide poisoning or fire may
occur as a result.
Exhaust vent
terminal
Unit
Prohibited
Exhaust vent terminal
(indoor installation)
Prohibited
[NRC111-SV only]
Carbon Monoxide Poisoning Hazard. Do
not install this water heater in a mobile
home, recreation vehicle or on a boat.
[NRC111-DV only]
Carbon Monoxide Poisoning Hazard.
Do not install this water heater in a
recreational vehicle or on a boat.
Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
Do not place or use a spray can
near the water heater or the exhaust
vent terminal.
Do not place combustibles such as
laundry, newspapers, oils etc. near
the heater or the exhaust vent
terminal.
Prohibited
Unit
Prohibited
Prohibited
Prohibited
Flue
terminal
[NRC111-DV only]
Do not place outdoors
Rain may enter the unit or
the burner fire may be blown
by the wind, causing mal-
function or fire as a result.
Prohibited
Outdoor
Leave the proper clearance between the
water heater and nearby objects (trees,
timber, boxes with flammable materials etc.).
Left side:
Min. 2" Right side:
Min. 2"
Upper:
Min. 12"
Front:
Sug. 24"*
Be sure
to do.
*Indicates suggested clearances for maintenance.
[When installing indoors (NRC111-SV)]
Left side:
Min. 2" Right side:
Min. 2"
Upper:
Min. 36"
Front:
Sug. 24"
[When installing outdoors (NRC111-SV)]
Sug. 3" from
vent pipe
Left side:
Min. 2" Right side:
Min. 2"
Front:
Sug. 24"*
Sug.3" from
vent pipe*
Upper:
Min. 12"
[When installing indoors ( NRC111-DV ) ]
Flue
terminal
WARNING
air supply
vent
[When installing indoors
(NRC111-SV only)]
Check the air supply
vent for dust or
obstructions.
Be sure
to do.
Installation and service must be
performed by a qualified installer,
service agency or the gas supplier.
Be sure
to do.
199,900
186,000
3.6
3.05 3.05
3.6
192,700
179,300
199,900 BTU
11,000 BTU 222 4.0
0.85 3.05
10.5
840
10.3a-2007
15 150
4.3a-2007
4
NRC111-SV

5
CAUTION
If this unit will be installed in a beauty salon
or other location where hair spray or aerosols
will be used, locate the unit in a separate area
that is supplied with fresh air from outdoors.
Do not use hair spray or spray
detergent in the vicinity of the
heater.
Do not allow small children to play
unsupervised in the bathroom.
Do not allow small children to bathe
unsupervised.
Prohibited
Be sure to electrically ground the
unit.
Keep power cord free of dust.
Ground.
Be sure
to do.
Do not use the water heater for
other than hot water supply, shower
and bath.
Prohibited
Prohibited
Do not cover the water heater and
the exhaust vent terminal, store
trash or debris near it, or in any way
block the flow of fresh air to the unit.
Do not install in locations where
excessive dust or debris will be
in the air.
Do not touch the exhaust vent pipe and
exhaust vent terminal during or immediately
after operation of the water heater.
Prohibited
Do not use a broken or modified power cord.
Do not bind, bend or stretch power cords. Do not
scratch, modify, or subject them to impact or force.
To prevent burns or scalding, turn off the
power button and wait until the equipment
cools before performing maintenance.
Do not turn off the water heater
while someone is bathing.
Prohibited
Don’t
touch.
Prohibited
Be sure
to do.
Do not touch the power
cord with wet hands.
Prohibited
Electric
Shock.
Don’t touch
with a wet
hand.
Prohibited
Contact a qualified service
technician for any necessary
repairs, service or maintenance.
Don’t
disassemble
the equipment.
Be sure
to do.
California Proposition 65 lists chemical
substances known to the state to cause cancer,
birth defects, death, serious illness or other
reproductive harm. This product may contain such
substances, be their origin from fuel combustion
(gas, oil) or components of the product itself.
Do not use condensate, discharged
from the drain pipe, for drinking or
for consumption by animals.
Prohibited
(NRC111-SV) (NRC111-DV)
Consult the nearest Noritz agent if
the water heater location needs to
be changed.
Be sure
to do.
The gas conversion kit shall be installed by a
qualified service agency in accordance with
the manufacturer’s instructions and all
applicable codes and requirements of the
authority having jurisdiction. The
information in the instructions must be
followed to minimize the risk of fire or
explosion or to prevent property damage,
personal injury, or death. The qualified
service agency is responsible for the proper
installation of this kit. The installation is not
proper and complete until the operation of
the converted appliance is checked as
specified in the manufacturer’s instructions
supplied with the kit.
Contact Noritz before using with
a solar pre-heater.

6
Important Safety Information-3
CAUTION
Do not drink water that has been inside the
unit for an extended period of time. Do not
drink the first use of hot water from the
unit in the morning.
Clean the filter on the water inlet as
frequently as required by the quality of
your local water.
Keep the area around the unit clean.
If boxes, weeds, cobwebs, cockroaches etc. are in
the vicinity of the unit, damage or fire can result.
Do not install the equipment where the
exhaust will blow on walls or windows.
Problems resulting from scale formation
are not covered by the warranty.
Preventing damage from freezing ( p.18)
Damage can occur from frozen water within the
device and pipes even in warm environments.
Be sure to read below for appropriate measures.
Repairs for damage caused by freezing are not
covered by the warranty.
This unit is only approved for installation
up to 4500 ft. above sea level.
For installations at higher elevations, contact Noritz
America for Instructions.
Check ignition during use and extinction
after use.
Take necessary measures to prevent
freezing of water and leakage of gas when
leaving the unit unused for long periods of
time. ( p.19)
Do not use parts other than those specified
for this equipment.
If it is snowing, check the air inlet, exhaust
gas vent and exhaust vent terminal for
blockage.
Do not disassemble the remote controller.
Do not use benzene, oil or fat detergents
to clean the remote controller.
This may cause deformation.
Do not get the remote controller wet.
Although it is water resistant, too much water can
cause damage.
Do not splash water on the remote
controller. Do not expose the remote
controller to steam.
Do not locate the remote controller near stoves or
ovens, this may cause damage or failure.
If the water supply is in excess of 12 grains
per gallon (200 mg/L) of hardness, acidic or
otherwise impure, treat the water with
approved methods in order to ensure full
warranty coverage.

7
Important Safety Information....................................................................... 2
Contents ........................................................................................................ 7
Overview of Condensing Tankless Gas Water Heater ............................... 8
General Parts
Main Unit.................................................................................................... 9
Remote Controller ................................................................................... 10
Initial Operation ........................................................................................... 11
How to Use
Setting and Using the Water Heater........................................................ 12
Flow Meter Alarm ...................................................................................... 14
Muting the Remote Controller ................................................................. 16
Adjusting the Maximum Output Temperature........................................ 17
Preventing Damage from Freezing ............................................................ 18
Regular Maintenance................................................................................... 21
Troubleshooting .......................................................................................... 23
Follow-up Service ........................................................................................ 28
Specifications .............................................................................................. 30
Contents

8
Cold water Cold water Gas Gas Hot water Hot water
Condensate
Combustion gas
About 400°F
About 400°F
Exhaust Exhaust
About 120°F
Conventional
type
Condensing
Tankless Gas
Water Heater
Water is heated
using the exhaust
gas which is about
400°F
.
Primary heat exchanger
Primary heat exchanger
Secondary heat exchanger
Neutralizer
Combustion gas
About 400°F
The condensing tankless gas
water heater discharges
condensate.
When heat from the exhaust gas is collected
within the secondary heat exchanger,
condensation occurs from moisture in the
exhaust gas and the resulting water is
discharged from the drain pipe (approx. 2
gallons/hour (GPH) maximum). It is not a
water leak. Do not plug or block the drain line
as it must always be allowed to freely flow.
Drain pipe
(Installation example)
Overview of Condensing Tankless Gas Water Heater
This water heater is a high efficiency, fully condensing appliance. Unlike a traditional tankless water
heater, a condensing type captures heat from the exhaust gas and uses it to preheat the incoming
cold water as it passes through the secondary heat exchanger as illustrated below.
The condensing tankless gas
water heater tends to show
white steam.
After the exhaust gas passes through the
secondary heat exchanger, it becomes low in
temperature and moisture rich which tends to
produce steam at the vent discharge terminal.
This is a normal occurrence.
Condensate
comes out
from here.
During combustion, white
steam may often be seen.
This is normal.

9
Indoor/Outdoor Wall Mounted, Power Vented Model
* The above illustration shows an example of installation.
The exact installation configuration may be slightly different.
Main Unit
Flue Collar
Front Cover
Air Inlet
Water Supply Valve
Gas Supply Valve
Water Drain Valve (with Water Filter)
(Inside Water Inlet) (p.22)
Pressure Relief Valve
General Parts-1
Drain Pipe
Discharges the
condensate.
NRC111-DV
Indoor Wall Mounted,
Power Vent/Sealed Model
Flue Collar
Intake pipe
(Ex. NRC111-SV)

10
Remote Controller (RC-7649M)
Burner On Indicator
For setting the hot
water temperature,
the flow meter alarm,
and other settings.
Power On/Off Button
For turning the
heater on and off.
Flow Meter Alarm Set Button
For setting the flow
meter alarm.
(p.14 - 15)
Setting Buttons
* Before use, remove the protective sheet from the remote controller surface.
Temperature Setting
(Ex.: 110°F)
Flow Meter Setting
The display will flash
after hitting the flow
meter alarm set button.
(p.15)
Error Code
When this indicator is lit,
the hot water temperature
can be set. ( p.12)
What is actually displayed depends on how the water heater is set.
A number will flash if
a failure occurs.
(p.26)
Priority Indicator
When burning, the
indicator is lit.
( p.13 and 15)
General Parts-2

11
Initial Operation
Before the first use of your water heater, make the following preparations.
Follow steps 1 through 4.
1Open the water supply valve.
Open a hot water fixture to confirm that
water is available, and then close the
fixture again.
3Open the gas supply valve.
Hot water fixture
2
Turn on the power.
CLOSED
4
OPEN
(Ex. NRC111-SV)
Do not touch with wet hands.

12
Remote Controller Display
Press the Power
On/Off Button.
How to Use
Setting and Using the Water Heater
Previous set
temperature
(Ex.: 110°F)
The temperature will be
displayed on the remote
control thermostat.
1
2(Starting with the Power Off)
On
On
High Temperature
To prevent scalding:
Flashes for 10 sec
1
DANGER
Hot Water Heater temperatures over 125°F can cause
severe burns instantly or death from scalding.
•Children, disabled and elderly are at the highest risk of being scalded.
Feel water temperature before bathing or showering.
Temperature limiting valves are available, ask professional person.
• When setting the unit to 125°F or higher, the temperature
display will flash for 10 seconds and emit a tone as a high
temperature warning.
•Take caution when using the unit again after setting to 125°F
or higher. Always check the set temperature before use.
• Do not allow anyone to change the water temperature while
hot water is running.

13
4
3Turn on hot
water.
2
Set temperature.
Turn off the hot
water.
(
Always check the
)
temperature setting
before use.
Hot
Cold
Check the indicator lights.
Water temperature
On Off
(°F: )
The temperature settings below are examples. The temperature setting
necessary depends on the usage, the length of piping and the time of year.
*Initial factory setting is 110°F
If fixtures incorporate mixing valves,
set the temperature higher than usual.
* For most residential applications, the recommended setting temperature is 120°F or less.
For applications that occasionally require a higher temperature setting, locate the remote controller
in a convenient location.
* Consult local codes for minimum operating temperatures.
100 105 110 115 120 125 130 135 140 145 150 160 170 180
Shower, hot water supply,
etc.
Washing
dishes, etc.
High temperature
Contact the installer or Noritz America
when setting the maximum output tem-
perature in this range.
The maximum output temperature
can be set using the remote
controller. ( p.17)

14
How to Use
Flow Meter Alarm
3
2,3
1
2
Set temperature.
Press the Power
On/Off Button
Plug the bath drain.
Preparation
(Starting with the power off)
(
Always check
)
temperature setting
before use.
Hot
Cold
On
The temperature will be displayed
on the remote control thermostat.
Previous set temperature
(example:110°F)
On Check the indicator lights.
Water temperature
1

15
100 105 110 115 120
An alarm will sound for ten
seconds when the flow
reaches the set level.
The water will continue to run unless it is
manually turned off. * Initial factory setting: 110°F
Water Temperature
The temperatures settings below are only examples. The
temperature setting necessary will depend on the usage,
the length of piping and the time of year.
(°F: )
Warmer HotWarm
5Turn off the hot
water when the
alarm sounds.
4Turn on hot
water.
3Adjust flow meter
alarm setting.
To set the flow meter alarm:
Press the flow meter alarm set button
(the setting will flash on the display)
and adjust with the setting buttons.
Increase
Decrease
Choose the flow meter alarm setting
from the following options: 10 - 60
(In 5 gallon intervals), 70 - 100 (In
10 gallon intervals), or 990 gallons.
Note:
The alarm will not sound if
it is set for 990 gal.
Note:
The alarm will not
sound if it is set for
990 gal.
On
Flow meter setting will be flashing
(ex. 45 gal.)
*The level can only be adjusted
while the indicator is flashing.
* After ten seconds, the remote
will again display the temperature.
Off
If the flow meter alarm is being used to indicate when a tub is full:
• If any hot water is being used besides what is going into the tub, the alarm will sound before
the tub is full.
• If there was water in the tub before the fill began, or if the water is not shut off manually when
the alarm sounds, the tub may overflow.
• If there was water in the tub before the fill began, the temperature in the tub after it is full may
be different from the temperature setting.
The alarm will sound when
the set level has been
reached. Stop the water.

16
The remote controller will emit a sound
when any button is pushed. This sound
can be muted if it is desired.
1
How to Use
Muting the Remote Controller
* Initial factory setting is with sound
Sound
Muted
No sound
after 5 sec.
1Hold the Power On/Off
Button for five seconds.
Tone sounds
after 5 sec.
• The flow meter alarm cannot be muted.
• The high temperature warning tone when setting the unit to 125°F or higher will not emit a sound
when muted.

17
How to Use
Adjusting the Maximum Output Temperature
2
3
1
3
Change the
temperature using
the setting buttons.
Press and hold the flow
meter alarm set button until
a sound is heard (2 sec.).
Up
Down
The upper limit of the hot-
water supply temperature can
be changed to 100°F, 105°F,
110°F, 115°F, 120°F, 125°F,
130°F, 135°F or 140°F.
2
Turn off the
power.
Off
1
Set the Power button to ON when continuing to use
the unit as is. Otherwise, let the unit sit for 30 sec.
4
Tone sounds
after 2 sec.

18
*Damage can occur from frozen water within the device and pipes even in warm environments.
Be sure to read below for appropriate measures.
*Repairs for damage caused by freezing are not covered by the warranty.
Freezing cannot be prevented when the power plug is unplugged. Do not remove the power
plug from the wall outlet.
(Freezing will be prevented regardless of whether the operation switch is ON or OFF.)
* Remember to set mixing valves and fixtures to their original levels before using the unit again
to prevent scalding.
* If there is still a risk that the unit will freeze, drain the unit as shown on the next page.
0.2" thick
Hot Water Fixture
Preventing Damage from Freezing-1
Freezing is prevented within the device automatically by the freeze-prevention heater
CAUTION
Take the measures below for extremely cold temperatures*.
(outside temperature including wind chill factor less than -30 ° F (indoor installation) or
-4 ° F (outdoor installation)).
This method can protect not only the heater, but also the water supply,
water piping and mixing valves.
1. Turn the unit on with the Power Button on the Remote Controller.
2. Close the gas supply valve.
3. Open a hot water fixture and let it run for approx. 2 minutes, and then
check that the number 11 is flashing on the remote controller display.
* If multiple units are being used, drain two minutes for each unit.
* It is possible that a different number may be displayed on the
remote controller, but as long as it is flashing, you may continue.
4. Partially close the hot water fixture, but keep a small amount of hot water running
(0.1 gal./minute or about 0.2” thick).
* If there is a mixing valve, set it to the highest level.
* When linking multiple units, discharge water equivalent to 0.1 gal./minute per unit.
5. The flow may become unstable from time to time. Check the flow 30 minutes later.
If water will not flow because it is frozen
1. Close the gas and water valves.
2. Turn off the power button.
3. Open the water supply valve from time to time to check whether water is running.
4. When the water is flowing again, check for water leaks from the equipment and piping before using.
If the heater or the piping is frozen, do not use the heater or it may get damaged.
* In normal operation, freezing is prevented within the device automatically unless the outside
temperature without wind is below -30°F (indoor installation) or -4°F (outdoor installation).
* The freeze prevention heaters will not prevent the plumbing external to the unit from freezing.
Protect this plumbing with insulation, heat tape or electric heaters, solenoids, or pipe covers.
If there remains a freezing risk, contact the nearest Noritz agent.

19
If the water heater will not be used for a long period of time, drain the water.
Drain the water as follows:
To avoid burns, wait until the equipment cools down
before draining the water. The appliance will remain
hot after it is turned off.
High Temperature
CAUTION
Fully open all hot water fixtures.
4Open all drain plugs and drain the water out of
the unit.
1
Close the water supply
valve.
6
Close the gas valve and disconnect
the electrical power supplied to the unit.
2
3Fully open all
hot water fixtures.
Fixture
Drainage Using the Remote Controller
2(1) Turn the power on/off button “On”.
(2) Turn and leave open
the hot water fixtures
for more than 2 minutes
and close.
* If multiple units are being used,
drain two minutes for each unit.
* An 11 Error Code may appear on
the remote controller.
This is not a malfunction of the unit.
Do not turn Power ON/OFF Button OFF.
Manual Draining
Close the water supply
valve and disconnect
the electrical power
supplied to the unit.
3
4
5When the water is completely drained, replace
all drain plugs and close the hot water fixtures.
5Open all drain plugs and drain the
water out of the unit.
6
Close the gas valve.
1
When the water is completely drained,
replace all drain plugs and close the
hot water fixtures.
Fixture
Fixture
(Ex. 120°F)
Do not touch with wet hands.
Drain Plugs
Do not touch with wet hands.
Drain water into a bucket to prevent water damage.
(1) Turn the power on/off
button “off”.
(2) Press the flow meter alarm set
button for about two seconds
until the alarm sounds.
The maximum hot water
temperature will flash.
(3) Press the flow meter alarm
set button again.
(4) Press the setting button
marked “ “.
The display
will change from "oF" to "on"
after the button is pushed.

20
Preventing Damage from Freezing-2
Turning the Unit Back On
1. Check that all drain plugs are inserted.
2. Check that all hot water fixtures are closed.
3. Follow the procedure on p.11 “Initial operation”, steps 1 through 4.
4. Make sure that the area around the appliance is well ventilated; open a window or a door if necessary.
Then, operate the unit and verify that condensate is coming out of the drain pipe.
(During normal use of the water heater, condensate will begin to discharge from the drain pipe within 15
minutes of use. However, depending on the season and/or installation site conditions, it may take longer.)
* If water does not appear at the end of the drain line, a qualified service technician must clean the
condensate line.
After the water heater has been out of use for a long time or after replacing the
neutralizer with a new unit, make sure that you fill the neutralizer unit with water.
This is to prevent dangerous exhaust gases from entering the building.
Failure to fill the neutralizer unit could result in severe personal injury or death.
(By performing step 4 as described above, the neutralizer unit will automatically fill
itself with water.)
Be sure to do.
DANGER