Owner`s Guide - Img
CONDENSING TANKLESS GAS WATER HEATER
Owner’s Guide
Models : NRC1111-DV
NRC1111-OD
FOR USE IN RESIDENTIAL OR MANUFACTURED HOME APPLICATIONS.
WARNING
If the information in this manual is not followed exactly, a fire or explosion
may result causing property damage, personal injury, or death.
-Donotstoreorusegasolineorotherflammablevaporsandliquidsinthe
vicinityofthisoranyotherappliance.
- WHAT TO DO IF YOU SMELL GAS
•Donottrytolightanyappliance.
•Donottouchanyelectricalswitch;donotuseanyphoneinyourbuilding.
•Immediatelycallyourgassupplierfromaneighbor’sphone.Followthe
gassupplier’sinstructions.
•Ifyoucannotreachyourgassupplier,callthefiredepartment.
-Installationandservicemustbeperformedbyaqualifiedinstaller,service
agencyorthegassupplier.
CERTIFIED
R
Low NOx Approved
by SCAQMD
14 ng/J or 20 ppm
(Natural Gas Only)
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.
Noritz America reserves the right to discontinue, or change at any time, the
designs and/or specifications of its products without notice.
NORITZ America Corporation
SBA8723
Rev. 10/11
*SBA8723*
ImportantSafetyInformation-1
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.
Iconswarningofrisklevel
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.
DANGER
DANGER indicates an imminently hazardous situation which,
if not avoided, will result in death or serious injury.
WARNING
WARNING indicates a potentially hazardous situation which, if not
avoided, could result in death or serious injury.
CAUTION
CAUTION indicates a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury.
CAUTION
CAUTION used without the safety alert symbol indicates a potentially
hazardous situation which, if not avoided, may result in property damage.
Other icons
Electric
Shock.
High
Temperature.
Be sure
to do.
Prohibited
No flame.
Don’t
touch.
Ground.
Don’t
disassemble
the equipment.
Don’t touch
with a wet
hand.
DANGER
Vaporsfromflammableliquidswillexplodeandcatchfirecausingdeathorsevereburns.
Prohibited
Do not use or store flammable products such as gasoline, solvents or
adhesives in the same room or area near the water heater.
Keepflammableproducts:
1.Farawayfromthewater
heater.
2.Inapprovedcontainers.
3.Tightlyclosed.
4.Outofchildren’sreach.
Vapors:
1.Cannotbeseen.
2.Vaporsareheavierthanair.
3.Goalongwayonthefloor.
4.Canbecarriedfromotherrooms
tothemainburnerbyaircurrents.
HotWaterHeatertemperaturesover125°F(52°C)cancausesevereburns
instantlyordeathfromscalding.
Prohibited
2
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.
(Continued)
(Continued)
Prohibited
Prohibited
[NRC1111-DV]
Do not use the water heater
iftheintake/exhaustpipe
isdisplaced,hasholes,is
cloggedoriscorroded.
Be sure
to do.
[NRC1111-OD]
DoNotInstallIndoors.
Blocking the opening may result
in incomplete combustion.
This will cause carbon
monoxide poisoning and
a potential fire hazard.
Afterthewaterheaterhasbeenoutof
useforalongtimemakesurethatyou
fillthecondensatetrapwithwater.
This is to prevent dangerous exhaust
gasesfromenteringthebuilding.
Failuretofillthecondensatetrapcould
resultinseverepersonalinjuryordeath.
(Refertopage20forfurtherinstructions.)
Indoor
Donotallowanyonetochangethewater
temperaturewhilehotwaterisbeingused.
Prohibited
[Whensupplyingcombustionair
Air supply vent
fromtheindoors]
Towel
Checkwhetherornottheair
supplyventisblockedwith
dust,trash,atowel,orthelike.
Be sure
to do.
To prevent scalding, do not change the
water temperature to a higher setting.
WARNING
No flame.
A.Thiswaterheaterdoesnothave
apilot.Itisequippedwithan
ignitiondevicethatautomatically
lightstheburner.Donottryto
lighttheburnerbyhand.
B. BEFORE OPERATING smell all
aroundthewaterheaterareafor
evidenceofleakinggas.Besure
tosmellnexttothefloorbecause
somegasisheavierthanairand
willsettleonthefloor.
WHATTODOIFYOUSMELLGAS.
•Donottrytolightany
appliance.
•Donottouchanyelectrical
switch;donotuseanyphone
inyourbuilding.
• Immediatelycallyourgas
supplierfromaneighbor’s
phone.Followthegassupplier’s
instructions.
• Ifyoucannotreachyourgas
supplier,callthefiredepartment.
C. Useonlyyourhandtoturn
thegasvalveknob.Neveruse
tools.Iftheknobwillnotturnby
hand,don’ttrytorepairit.Call
aqualifiedservicetechnician.
Forceorattemptedrepairmay
resultinafireorexplosion.
D. Donotusethiswaterheaterif
anyparthasbeenunderwater.
lmmediatelycallaqualified
servicetechniciantoinspectthe
waterheaterandtoreplaceany
damagedparts.
Be sure
to do.
Be sure
to do.
Prohibited
Whenagasleakisnoticed:
1. Stopuseimmediately.
2. Closethegasvalve.
[NRC1111-DV]
3. Openwindowsanddoors.
Ifyoudetectabnormalcombustion
orabnormalodors,orduringan
earthquake,tornadoorfire:
1. Turnoffthehotwatersupply.
2. Turnoffthepowertothewater
heater.
3. Turnoffgasandwatersupply
valve.
4. CallthenearestNoritzagent.
ExplosionHazard;
Ifthetemperatureandpressurerelief
valveisdrippingorleaking,havea
qualifiedservicetechnicianreplaceit.
Donotplugorremovethevalve.
Failure to follow these instructions can result in fire or explosion, and personal injury
or death.
High
Temperature.
Checkthetemperature
oftherunninghotwater
beforeenteringthe
shower.
Checkthetemperature
beforesteppinginto
thebathtub.
(Continued)
3
ImportantSafetyInformation-2
(Continued)
WARNING
Prohibited
Donotplacetheexhaustventterminal
inanindoorenvironmentbymeansof
adding walls and ceiling (Do not encloseusingcorrugatedsheets,etc.)
Exhaust vent
terminal
Prohibited
Prohibited
[NRC1111-DV]
Donotplaceoutdoors.
Prohibited
Rain may enter the unit
or the burner fire may be
blown by the wind, causing
malfunction or fire as a result.
Outdoor
Leavetheproperclearancebetween
thewaterheaterandnearbyobjects
(trees,timber,boxeswithflammable
Be sure
materialsetc.).
to do.
[NRC1111-DV]
Prohibited
Prohibited
Donotplaceoruseaspraycannear
thewaterheaterortheexhaustvent
terminal.
Be sure
to do.
Left side:
Min. 2" (50mm)
Ex.ForNaturalGas(NRC1111-DV)
Right side:
Min. 2" (50mm)
Front:
Sug. 24" (600mm)*
[NRC1111-OD]
Upper:
Min. 36" (900mm)
Left side:
Min. 6" (150mm)
Right side:
Min. 6" (150mm)
Front:
Sug. 24" (600mm)*
Be sure
to do.
Prohibited
* Indicates suggested clearances for maintenance.
Donotplacecombustiblessuchas
laundry,newspapers,oilsetc.nearthe
heaterortheexhaustventterminal.
Exhaust vent
terminal
Unit
4
Besurethegas/power
supplied matches the
gasontheratingplate.
Sug.3" (75mm)
from vent pipe*
Upper:
Min. 12" (300mm)
Prohibited
Donotusecombustiblechemicals
suchasoil,gasoline,benzeneetc.
intheneartheheaterortheexhaust
ventterminal.
Do not store or use gasoline or other
flammablevaporsandliquidsinthe
vicinityofthisoranyotherappliance.
Unit
Carbon monoxide poisoning or fire may
occur as a result.
CarbonMonoxidePoisoningHazard.
Do not install this water heater in a
recreationvehicleoronaboat.
Prohibited
Be sure
to do.
Installationandservicemustbe
performedbyaqualifiedinstaller,
serviceagencyorthegassupplier.
Ifthisunitwillbeinstalledinabeauty
salon or other location where hair
sprayoraerosolswillbeused,locate
the unit in a separate area that is
suppliedwithfreshairfromoutdoors.
Donotusehairsprayorspray
detergentinthevicinityofthe
heater.
[Whensupplyingcombustionair
fromtheindoors]
Checktheairsupplyopening
fordustorobstructions.
Clogged
air supply
opening!!
(Continued)
(Continued)
Prohibited
Donotallowsmallchildrentoplay
unsupervisedinthebathroom.
Donotallowsmallchildrentobathunsupervised.
Do not touch the power
cordwithwethands.
Don’t touch
with a wet
hand.
Be sure
to do.
Don’t
disassemble
the equipment.
Electric
Shock.
ConsultthenearestNoritzagentif
the water heater location needs to
bechanged.
Contactaqualifiedservice
technicianforanynecessary
repairs,serviceormaintenance.
ContactNoritzbeforeusingwith
asolarpre-heater.
Be sure
to do.
CaliforniaProposition65listschemicalsubstances
knowntothestatetocausecancer,birthdefects,
death,seriousillnessorotherreproductiveharm.
Thisproductmaycontainsuchsubstances,
betheiroriginfromfuelcombustion(gas,oil)
orcomponentsoftheproductitself.
Thegasconversionkitshallbeinstalledbya
qualifiedserviceagencyinaccordancewith
themanufacturer’sinstructionsandall
applicablecodesandrequirementsofthe
authorityhavingjurisdiction.The
informationintheinstructionsmustbe
followedtominimizetheriskoffireor
explosionortopreventpropertydamage,
personalinjury,ordeath.Thequalified
serviceagencyisresponsiblefortheproper
installationofthiskit.Theinstallationisnot
properandcompleteuntiltheoperationof
theconvertedapplianceischeckedas
specifiedinthemanufacturer’sinstructions
suppliedwiththekit.
CAUTION
Besuretoelectricallygroundthe
unit.
Prohibited
Ground.
Keeppowercordfreeofdust.
Be sure
to do.
Prohibited
Prohibited
Be sure
to do.
Prohibited
Donotusethewaterheaterfor
otherthanhotwatersupply,shower
andbath.
Donotuseabrokenormodifiedpowercord.
Donotbind,bendorstretchpowercords.
Donotscratch,modify,orsubjectthemto
impactorforce.
Prohibited
Do not install in locations where
excessivedustordebriswillbe
intheair.
Donottouchtheexhaustventpipe
andexhaustventterminalduring
orimmediatelyafteroperationof
thewaterheater.
Don’t
touch.
[NRC1111-DV]
Topreventburnsorscalding,turnoffthe
powerbuttonandwaituntiltheequipment
coolsbeforeperformingmaintenance.
Donotturnoffthewaterheater
whilesomeoneisbathing.
Donotcoverthewaterheaterand
theexhaustventterminal,storetrash
ordebrisnearit,orinanywayblock
theflowoffreshairtotheunit.
Prohibited
[NRC1111-OD]
Donotusecondensate,discharged
fromthedrainpipe,fordrinkingor
forconsumptionbyanimals.
5
ImportantSafetyInformation-3
CAUTION
Donotdrinkwaterthathasbeeninsidethe
unitforanextendedperiodoftime.Donot
drinkthefirstuseofhotwaterfromthe
unitinthemorning.
For installations at higher elevations, contact Noritz
America for Instructions.
Cleanthefilteronthewaterinletas
frequentlyasrequiredbythequalityof
yourlocalwater.
Donotdisassembletheremotecontroller.
Keeptheareaaroundtheunitclean.
This may cause deformation.
If boxes, weeds, cobwebs, cockroaches etc. are in
the vicinity of the unit, damage or fire can result.
Donotgettheremotecontrollerwet.
Donotinstalltheequipmentwherethe
exhaustwillblowonwallsorwindows.
Ifthewatersupplyisinexcessof12grains
per gallon (200 mg/L) of hardness, acidic
or otherwise impure, treat the water with
approved methods in order to ensure full
warrantycoverage.
Problemsresultingfromscaleformation
arenotcoveredbythewarranty.
Checkignitionduringuseandextinction
afteruse.
Do not run water through the unit when
unitisnoton.
When discharging hot water, make sure the unit is ON.
If water is run through the unit with the unit
OFF, water may condense inside the unit and cause
incomplete combustion or damage to the internal
electrical components.
For single-handle fixtures or valves, discharge
water setting the handle completely
to the water side.
6
Thisunitisonlyapprovedforinstallation
upto4500ft.(1350m)abovesealevel.
Donotusebenzene,oilorfatdetergents
tocleantheremotecontroller.
Although it is water resistant, too much water can
cause damage.
Do not splash water on the remote
controller.Donotexposetheremote
controllertosteam.
Do not locate the remote controller near stoves or
ovens, this may cause damage or failure.
Preventingdamagefromfreezing(
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.
Takenecessarymeasurestoprevent
freezingofwaterandleakageofgaswhen
leavingtheunitunusedforlongperiodsof
time.( p.19)
Ifitissnowing,checktheexhaustvent
terminalforblockage.
Donotusepartsotherthanthosespecified
forthisequipment.
Contents
ImportantSafetyInformation....................................................................... 2
Contents......................................................................................................... 7
OverviewofCondensingTanklessGasWaterHeater.............................. 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
AdjustingtheMaximumOutputTemperature........................................ 17
PreventingDamagefromFreezing............................................................. 18
Regular Maintenance................................................................................... 21
Troubleshooting........................................................................................... 23
Follow-upService........................................................................................ 28
Specifications............................................................................................... 30
7
OverviewofCondensingTanklessGasWaterHeater
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.
Conventional
type
Exhaust
About
400˚F(200˚C)
Condensing
TanklessGas
Water Heater
Exhaust
About
120˚F(49˚C)
Water is heated
usingtheexhaust
gaswhichisabout
400˚F(200˚C).
Secondary heat exchanger
Combustiongas
About
400˚F(200˚C)
Combustiongas
About
400˚F(200˚C)
Primary heat exchanger
Primary heat exchanger
condensate trap
Condensate
Hot water
Gas
Cold water
Hot water
Gas
Cold water
Thecondensingtanklessgaswater
heaterdischargescondensate.
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 (7.5 liters/hour) maximum). It is not a
water leak. Do not plug or block the drain line as it
must always be allowed to freely flow.
Note : The condensate discharged is acidic with a pH
level of approximately 2-3.
A condensate neutralizer may be required by
local code prior to disposal.
Drain pipe
(Installation example)
Condensate
comes out from
here.
Thecondensingtanklessgas
water heater tends to show
whitesteam.
8
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.
During combustion, white
steam may often be seen.
This is normal.
General Parts -1
Main Unit
[NRC1111-DV]
IndoorWallMounted,PowerVent/SealedModel
IntakePipe
Flue Collar
FrontCover
WaterDrainValve
(withWaterFilter)
(Inside Water Inlet)
( p.22)
PressureReliefValve
WaterSupplyValve
GasSupplyValve
Drain Pipe
Discharges the
condensate.
[NRC1111-OD]
OutdoorWallMounted,PowerVentedModel
ExhaustVent
* Theaboveillustrationshowsanexampleofinstallation.
The exact installation configuration may be slightly different.
9
General Parts -2
RemoteController(RC-7651M)
Whatisactuallydisplayeddependsonhowthewaterheaterisset.
Burner On Indicator
Setting Buttons
When burning, the
indicator is lit.
( p.13and15)
For setting the hot
water temperature,
the flow meter alarm,
and other settings.
PriorityIndicator
When this indicator is lit,
the hot water temperature
can be set.
( p.12)
Temperature Setting
(Ex.:110°F)
Flow Meter Setting
The display will flash
after hitting the flow
meter alarm set button.
( p.15)
Error Code
PowerOn/OffButton
For turning the
heater on and off.
Flow Meter Alarm Set Button
For setting the flow
meter alarm.
( p.14-15)
A number will flash if
a failure occurs.
( p.27)
* Before use, remove the protective sheet from the remote controller surface.
Note: As shipped from the factory, the remote controller is set to display in °F and gallons.
To adjust the display to °C and liters, refer to the Installation Manual.
10
Initial Operation
Before the first use of your water heater, make the following preparations.
Follow steps
1 through 4.
1
CLOSED
2
Open a hot water fixture to confirm that
water is available, and then close the
fixture again.
Open the water supply valve.
OPEN
Hot water fixture
3
4
Open the gas supply valve.
Turn on the power.
Donottouchwithwethands.
(Ex. NRC1111-DV)
11
How to Use
Setting and Using the Water Heater
2
1
(Starting with the Power Off)
1
Press the Power
On/OffButton.
On
The temperature will be
displayed on the remote
control thermostat.
On
Previous set
temperature
(Ex.: 110°F)
DANGER
Topreventscalding:
High Temperature
HotWaterHeatertemperaturesover125°F(52°C)cancause
severeburnsinstantlyordeathfromscalding.
• 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.
RemotecontrollerDisplay
• When setting the unit to 125°F / 55°C (131°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
(52°C) or higher. Always check the set temperature before use.
• Do not allow anyone to change the water temperature while hot
water is running.
12
Flashes for 10 sec
2(
Settemperature.
Alwayscheckthe
temperature setting
beforeuse.
)
3
4
Turn on hot
water.
Turnoffthehot
water.
Hot
Cold
Check the indicator lights.
On
Off
Water temperature
(
When using °F mode:
temperature settings below are examples. The temperature setting
°F: The
necessary depends on the usage, the length of piping and the time of year.
100
Washing
dishes, etc.
105
110
115
)
The maximum output temperature can be
set using the remote controller. ( p.17)
120
125
Shower, hot water supply, etc.
130
135
140
High temperature
*Initial factory setting is 110°F
(
When using °C mode:
temperature settings below are examples. The temperature setting
°C (°F): The
necessary depends on the usage, the length of piping and the time of year.
37 38
(99) (100)
Washing
dishes, etc.
The maximum output temperature
can be set using the remote
controller. ( p.17)
)
39 40 41 42 43 44 45 46 47 48 50 55 60
(102) (104) (106) (108) (109) (111) (113) (115) (117) (118) (122) (131) (140)
Shower, hot water supply, etc.
High
temperature
*Initial factory setting is 40°C (104°F)
If fixtures incorporate mixing valves, set the temperature higher than usual.
* For most residential applications, the recommended setting temperature is 120°F / 50°C (122°F)
or less.
* Consult local codes for minimum operating temperatures.
13
How to Use
Flow Meter Alarm
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.
2,3
1
3
(Starting with the power off)
Preparation
1
Press the Power
On/Off Button
Plug the bath drain.
Set temperature.
2(
Always check
temperature setting
before use.
)
On
Hot
Cold
When the display
When the display
setting is in Celsius. setting is in Fahrenheit.
The temperature will be displayed
on the remote control thermostat.
14
On
Previous set temperature (example:110°F)
On
Previous set temperature (example:40°C)
Check the indicator lights.
Water temperature
Check the indicator lights.
Water temperature
Water Temperature
temperatures settings below are only examples. The
°F : The
temperature setting necessary will depend on the usage,
An alarm will sound for ten
seconds when the flow
reaches the set level.
(
the length of piping and the time of year.
100
Warm
(°C (°F) :
105
110
Warmer
115
)
120
Hot
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.
)
37 38 39 40 41 42 43 44 45 46 47 48
(99) (100) (102) (104) (106) (108) (109) (111) (113) (115) (117) (118)
Warm
Warmer
Hot
The water will continue to run unless
it is manually turned off.
* Initial factory setting: 110°F or 40°C (104°F)
To set the flow meter alarm:
3
Adjust flow meter
alarm setting.
4
Turn on hot
water.
Press the flow meter alarm set button
(the setting will flash on the display)
and adjust with the setting buttons.
5
Turn off the hot
water when the
alarm sounds.
The alarm will sound when
the set level has been
reached. Stop the water.
Increase
Decrease
Choose the flow meter alarm setting from the following
options: 10 - 60 gallon (40 - 240L) (In 5 gallon (20L)
intervals), 70 gallon (260L), 80 gallon (300L),
90 gallon (340L), 100 gallon (380L) , 990 gallon.
Note:
The alarm will not sound if it is
set for 990 gallon.
Note:
The alarm will not sound
if it is set for 990 gallon.
On
Off
On
Off
Flow meter setting will be flashing
(ex. 45 gallon)
Flow meter setting will be flashing (ex. 180L)
* The level can only be adjusted
while the indicator is flashing.
* After ten seconds, the remote
will again display the temperature.
15
How to Use
Muting the Remote Controller
1
1
The remote controller will emit a sound
when any button is pushed. This sound
can be muted if it is desired.
* Initial factory setting is with sound
Hold the Power On/Off
Button for five seconds.
Muted
No sound
after 5 sec.
Sound
Tone sounds
after 5 sec.
• The flow meter alarm cannot be muted.
• The high temperature warning tone when setting the unit to 125°F / 55°C (131°F) or higher will
not emit a sound when muted.
16
How to Use
Adjusting the Maximum Output Temperature
3
1
2
1
Turn off the
power.
2
Press and hold the flow
meter alarm set button until
a sound is heard (2 sec.).
3
Tone sounds
after 2 sec.
Off
Change the
temperature using
the setting buttons.
Up
Down
The upper limit of the hot-water supply
temperature can be changed to
(For Fahrenheit (°F))
100°F, 105°F, 110°F, 115°F, 120°F,
125°F, 130°F, 135°F or 140°F.
(For Celsius (°C))
37°C, 38°C, 39°C, 40°C, 41°C, 42°C,
43°C, 44°C, 45°C, 46°C, 47°C, 48°C,
50°C, 55°C or 60°C.
4
Set the Power button to ON when continuing to use
the unit as is. Otherwise, let the unit sit for 30 sec.
17
Preventing Damage from Freezing-1
CAUTION
* 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 is prevented within the device automatically by the freeze-prevention heater.
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.
* In normal operation, freezing is prevented within the device automatically unless the outside
temperature without wind is below -30°F (-35°C) for NRC1111-DV or -4°F (-20°C) for
NRC1111-OD.
- For model NRC1111-DV, when supplying combustion air from the indoors, the room temperature must
be greater than 32°F (0°C) to prevent freezing and the room inside must not have negative pressure.
* 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.
Take the measures below for extremely cold temperatures*.
Outside temperature including wind chill factor less than -30°F (-35°C) for NRC1111-DV or -4°F (-20°C)
for NRC1111-OD.
- For model NRC1111-DV, when supplying combustion air from the indoors, the room temperature must
be greater than 32°F (0°C) to prevent freezing and the room inside must not have negative pressure.
This method can protect not only the heater, but also the water supply, water piping and mixing valves.
1. Turn off the power.
2. Close the gas supply valve.
Hot Water Fixture
3. Open a hot water fixture, and keep a small stream of hot water
running. (0.1 gallon (400cc)/minute or about 0.2" (4mm) thick.)
* If there is a mixing valve, set it to the highest level.
* When linking multiple units, discharge water equivalent to
(0.1 gallon (400cc)/minute per unit.)
4. The flow may become unstable from time to time.
0.2" (4mm)
Check the flow 30 minutes later.
thick
* In general, it is not advisable to run water through the unit when
it is OFF ( p. 6), but in this case freeze prevention is more important.
* 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.
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.
18
If the water heater will not be used for a long period of time, drain the water.
Drain the water as follows:
CAUTION
High Temperature
To avoid burns, wait until the equipment cools down
before draining the water. The appliance will remain
hot after it is turned off.
Drain water into a bucket to prevent water damage.
Drainage Using the Remote Controller
1
(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.
(Ex. 120°F)
Manual Draining
1
2
(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.
2
3
4
5
6
3
Close the water supply
valve.
Fully open all hot water fixtures.
Close the gas valve.
(1) Turn the power on/off button “On”.
Fixture
(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.
Close the water supply
valve and disconnect
the electrical power
supplied to the unit.
Do not touch with wet hands.
Fixture
Open all drain plugs and drain the water out of
the unit.
When the water is completely drained, replace
all drain plugs and close the hot water fixtures.
4
5
6
Fully open all
hot water fixtures.
Fixture
Open all drain plugs and drain the
water out of the unit.
When the water is completely drained,
replace all drain plugs and close the
hot water fixtures.
Close the gas valve and disconnect
the electrical power supplied to the unit.
Do not touch with wet hands.
Drain Plugs
(Ex. NRC1111-DV)
Each drain plug mignt not be visible if
insulation is installed around the piping.
19
Preventing Damage from Freezing-2
Turning the Unit Back On
1.
2.
3.
4.
Check that all drain plugs are inserted.
Check that all hot water fixtures are closed.
Follow the procedure on p.11 “Initial operation”, steps 1 through 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.
DANGER
Be sure to do.
20
After the water heater has been out of use for a long time make sure that you fill
the condensate trap with water.
This is to prevent dangerous exhaust gases from entering the building.
Failure to fill the condensate trap could result in severe personal injury or death.
(By performing step 4 as described above, the condensate trap will automatically
fill itself with water.)
Regular Maintenance-1
Periodic Inspection
CAUTION
To prevent burns or scalding, turn off the power button and wait until the
equipment cools before performing maintenance.
Be sure to do.
air supply vent
[When supplying combustion air
from the indoors]
Check For smear or blockage
with dust, oil, etc. at the
air supply vent.
If blocked, remove the
build-up with a vacuum
cleaner or damp towel.
Check For dust and soot in
the exhaust vent or
exhaust vent terminal.
Check For abnormal sounds
during operation.
* Do not permanently remove the Inlet Screen.
Check For abnormalities in
Check For laundry, newspaper,
timber, oil, spray cans
and other combustible
materials. near the
heater or the exhaust
vent terminal.
Check For blockage at the
external appearance,
discoloration or flaws.
Check For proper operation of
pressure relief valve.
Check For water leaks from the
equipment and piping.
drain pipe discharge.
(Ex. NRC1111-DV)
Periodic Maintenance
Equipment
Wipe the outside surface with a wet cloth, then dry the surface. Use a neutral detergent to clean any stains.
If an external condensate neutralizer is installed, periodic replacement of the neutralizing agent will be required.
Refer to the instructions supplied with the neutralizer for suggested replacement intervals.
Remote Controller
Wipe the surface with a wet cloth.
• Do not use benzene, oil or fatty detergents to clean the remote controller;
deformation may occur.
• The remote controller is water resistant but not water proof. Keep it as dry as possible.
21
Regular Maintenance-2
Periodic Maintenance
Water Drain Valve (with Water Filter)
If the water drain valve (with water filter) is covered with debris, the hot water may not run
smoothly, or the unit may put out cold water. Check and clean the filter as explained below.
* To avoid burns, wait until the equipment cools down before draining the water.
The appliance will remain hot after it is turned off.
1. Close the water supply valve.
2. Open all hot water fixtures.
3. With a bucket ready, remove the inlet and outlet
drain plugs (about 0.45 gallon (1.7 L) will drain out)
4. Take the water drain valve (with water filter) out of
the inlet. (See illustration to right).
5. Clean the water drain valve (with water filter) with
a brush under running water.
6. Replace the water drain valve (with water filter)
and close the drain plugs.
(Take care not to lose the packing.)
7. Close all hot water fixtures.
8. Open the water supply valve and check that
water does not leak from the drain plugs or water
drain valve (with water filter).
Inlet
Packing
Water drain valve
(with water filter)
Water Supply
Valve
(Ex. NRC1111-DV)
Optional Maintenance
Isolation Valves
* Isolation valves may be purchased as an
accessory from Noritz.
They allow for full diagnostic testing and easy
flushing of the system.
* The kit includes two full port isolation valves
and a pressure relief valve for the hot side.
Contact Noritz for more information.
Hot Water
Service Valve
Pressure Relief Valve
Cold Water
Service Valve
Water Intlet
Drain
22
Water Outlet
Troubleshooting-1
Initial Operation
Unit does not attempt to ignite
when water is running.
• Check for reversed plumbing or crossed pipes.
• Check the water drain valve filter. ( p.22)
Unit attempts to ignite but fails
• Reset unit and try again. There may be air in the gas line.
• Have a professional check the gas supply pressure.
Temperature
Hot water is not available
when a fixture is opened.
•
•
•
•
Are the gas and water supply valves fully open?
Is the water supply cut off?
Is the hot water fixture sufficiently open?
Is the gas being cut off by the gas meter?
(Can other gas devices such as stoves be used?)
• (For LP) Is there enough gas in the tank?
(Can other gas devices such as stoves be used?)
• Is the water drain valve filter clogged? ( p.22)
• Is the power button turned on?
No water is available when
a fixture is opened.
• Is the water supply cut off?
• Is the heater frozen?
The hot water is not the correct
temperature.
• Is the hot water fixture sufficiently open?
Water takes time to become hot
• Have you allowed enough time for the cold water in the
pipes to drain out?
when turning the hot water fixture.
The water is too hot.
• Are the gas and water supply valves fully open?
• Is the water temperature setting appropriate?
( p.12 and p.13)
• If the water supply temperature is high, it is possible
for the temperature to be higher than the temperature
set on the remote controller.
• If only a small amount of hot water is demanded, it is
possible for the temperature to be higher than the
temperature set on the remote controller.
The water is not hot enough.
• Are the gas and water supply valves fully open?
• Is the water temperature setting appropriate?
( p.12 and p.13)
• If the amount of hot water required is very high, it is
possible for the temperature to be lower than the temperature set on the remote controller.
Decrease the amount of hot water passing through the unit
and the temperature should stabilize.
(Continued)
23
Troubleshooting-2
(Continued)
The water is cold when only a
single fixture is open.
• The unit will not heat the water if the flow rate is less than
0.5 gallons (2L) per minute.
Open the fixture more or open other fixtures so that a greater
flow passes through the unit, and the unit should begin
heating again.
Fluctuations in hot water
temperatures.
• Set water temperature at 115°F to 120°F or 48°C (118°F) to
50°C (122°F). This will allow you to use a higher flow of hot
water thus meeting the minimum flow requirement of 0.5
GPM (2L/min.).
• Clean the water filter of any debris ( p.22)
Setting temperature cannot rise.
• Is the maximum temperature setting appropriate? (
p.17)
Amount of Hot Water
The amount of hot water at a
certain fixture is not constant.
• When hot water is demanded at other fixtures, the amount
available may be reduced. The maximum flow available
from this unit is 8.4 GPM (32L/mn.) at a 45°F (25°C)
temperature rise.
• Pressure fluctuations and other plumbing conditions can
cause the temperature and pressure at a fixture to be
unstable, but it should stabilize after a short time.
• There are some types of hot water taps that discharges
large volumes of hot water at first but stabilize after time.
• To keep the temperature stable, the heater limits the
amount of water that can flow through it to a small amount
initially, but the amount increases over time.
The amount of hot water in the tub • When hot water is used for other fixtures while filling the
is less/more than the set amount.
bath tub, the tub will not fill as much.
• If there is water in the tub already, or when filling is stopped
and restarted, the tub will fill more.
24
The flow meter alarm does not
sound even when filled to the set
amount.
• The flow meter alarm is set to sound when hot water
is continuously discharged for the set volume of water.
If mixing valves are used, or if cold water is mixed with hot
water at the fixture, the tub will fill more than the setting
of the flow meter alarm.
Amount of hot water available
has decreased over time.
• Is the water filter clogged? (
p.22)
• If the supply water is hard and has not been treated, scale
can build-up in the water heater and decrease the
maximum amount of hot water available. Scale can be
removed from the water heater by flushing the unit
periodically. To prevent scale from forming in the water
heater, a water softener or scale inhibitor is
recommended.
Remote Controller
The light on the power button does
not come on.
• Has there been a power failure?
The water temperature changes
after a power failure or when the
power is disconnected.
• The temperature setting and the flow meter alarm setting
may both need to be reset after a power outage.
• Is the power connected properly?
The plastic on the surface or buttons • The surface of the remote controller is affixed with a
protective sheet (to prevent surface scratching, etc.) at
of the remote controller has torn,
time of shipment. This sheet can be removed or left as it
peeled, or air bubbles inside.
is. When leaving the protective sheet on, areas frequently
touched may tear or peel. However, the remote controller
will not malfunction from water entering such torn or
peeled areas. To restore the appearance of the remote
controller surface, simply remove the protective sheet.
Sounds
The fan can be heard after
operation is stopped.
A motor can be heard when turning
the unit ON or OFF, when opening
or closing a fixture, or after the unit
has been running for a while.
• These noises indicate the proper operation of devices
The fan can be heard when it is
very cold outside.
• The fan may run to prevent freezing.
which are designed to let the unit reignite more quickly,
and ensure the water temperature is stable.
Other
The Heater stops burning during
operation.
•
•
•
•
White smoke comes out of the
exhaust vent on a cold day.
• This is normal. The white smoke is actually steam.
The hot water is turbid.
• This is harmless. Small bubbles appear as the air in the
water is heated and depressurized rapidly to
atmospheric pressure.
Are the gas and water supply valves fully open?
Is the water supply cut off?
Is the hot water fixture sufficiently open?
Is the gas being cut off by the gas meter?
(Can other gas devices such as stoves be used?)
• (For LP) Is there enough gas in the tank?
(Can other gas devices such as stoves be used?)
(Continued)
25
Troubleshooting-3
(Continued)
The water appears blue
The bath tub/wash-basin has turned
blue
• Coloration to a blue color may be noticed from small
traces of copper ion contained in the water and fat
(furring). However, there are not problems concerning
health. Coloration of the bath tub/wash-basin can be
prevented by cleaning frequently.
Frequent water discharge from the
drain pipe.
• Condensation forms inside the unit during operation
and is discharged from the drain pipe.
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Water Quality
Damage to the water heater as a result
of poor water quality is not covered by
the Limited Warranty. To ensure full
warranty coverage, treat or condition
water that exceeds the target levels
provided in this table.
Source: EPA National Secondary Drinking Water
Regulations (40 CFR Part 143.3)
Total Hardness*
Aluminum
Chloride
Copper
Iron
Manganese
pH
Total Dissolved Solids
Zinc
Sulfate ion
Residual chlorine
: 200 mg/L (12 gpg) or less
: 0.05 to 0.2 mg/L or less
: 250 mg/L or less
: 1 mg/L or less
: 0.3 mg/L or less
: 0.05 mg/L or less
: 6.5 - 8.5
: 500 mg/L or less
: 5 mg/L or less
: 250 mg/L or less
: 4 mg/L or less
* Maximum limit suggested by Noritz.
26
Check for an Error Code on the Remote Controller
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If there is a problem with the unit, a numerical error code will flash on the remote controller.
If this occurs, take appropriate measures as listed below.
Flashing
When an error code appears, the display and the operation light will
flash together.
Remote Controller
Error Code
Cause
Action
Ignition error
Check whether the gas valve is open. Press the power
button to turn the unit off, open a hot water fixture,
and turn the unit back on. If the flashing number
doesn't return the problem is solved.
Clogging of condensate
trap or drain pipe
Check to see if the condensate drain pipe is clogged
p.8)
or frozen (
Contact the installer or Noritz America Technical
Support for assistance.
[When supplying combustion
air from the indoors]
The air supply vent may
be clogged.
Clean the air supply vent.(
p.21)
If the display continues, contact the nearest Noritz
agent.
Abnormal combustion,
low gas supply pressure
Have a professional check the gas supply pressure.
Contact the nearest Noritz agent.
Abnormal combustion
Contact the nearest Noritz agent.
Contact Noritz America if:
• Any other error code appears.
• An error code is indicated again after the above actions were followed.
• There are any other questions.
27
Follow-up Service
Requesting Service
First follow the instructions in the troubleshooting section (
p.23 to p.27).
If the error is not corrected, contact Noritz America Technical Support at 866-766-7489.
We will need to know:
The Model .................(check the rating plate)
*See p.4 for the location of the label
Date of purchase ......(see the warranty)
Details of problem ....(flashing error codes,
etc., in much detail as possible)
Your name, address, and telephone number
Desired date of visit
* A request for service may be rejected if the water heater is installed
in a location where working on the unit may be dangerous. Contact a
plumber.
Warranty
A warranty registration card is included separately.
Be sure that the plumber, date of purchase and other necessary items are filled in.
Read the content carefully, and keep the warranty card in a safe place.
For repairs after the warranty period, there will be a charge on any service, and service will only
be performed if the unit is deemed repairable.
Period of Time for Stocking Repair Parts
Noritz will stock repair and maintenance parts for this unit for the time period from the date of
the original installation as follows: twelve (12) years for the heat exchanger and ten (10) years
for remaining parts.
Reinstallation
If you want to reinstall the appliance at a different location, confirm that the gas and power
supply indicated on the rating plate are available at the new location. If you are not sure,
consult the local utility company.
28
Gas Conversion
If you move to a region that uses a different type of gas or if the local gas supply is
converted,replacement of the gas manifold and adjustment of the appliance will be necessary.
This work must be performed by either Noritz or a qualified service agency and will be charged for
even during the warranty period. The qualified installer will also be responsible for purchasing the
gas conversion kit directly from the manufacturer.
For more information, contact Noritz America Technical Support at 866-766-7489.
WARNING
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.
* A qualified service agency is any individual, firm, corporation, or company which either in person or through
a representative is engaged in and is responsible for the connection, utilization, repair or servicing of gas
utilization equipment or accessories; who is experienced in such work, familiar with all precautions required,
and has compiled with all of the requirements of the authority having jurisdiction.
Before the gas conversion is performed, verify the proper gas conversion kit with your
water heater model on the table provided below.
Conversion Kit
Model
Conversion Type
CK-46
NRC1111-DV, NRC1111-OD
Propane to Natural Gas
CK-47
NRC1111-DV, NRC1111-OD
Natural Gas to Propane
The following parts are supplied in the conversion kit. These items will replace the existing parts that
are currently installed in the unit. Make sure that all parts are replaced and properly installed by a
qualified service agency.
* A Noritz remote controller and a digital gas manometer are required to complete the installation.
Do not proceed if this equipment is not immediately available.
Manifold Plate
O-Ring
Damper
Conversion Kit Label
After the necessary parts have been replaced on the unit, the remote controller is then used to adjust
the settings on the water heater for use with the proper gas type.
The gas pressure values at both the gas supply inlet fitting and at the manifold inlet on the unit are
verified by the installer. Proper adjustments will be made to ensure safe and efficient operation.
Once this is completed, a final gas leak check will be performed to confirm that all parts have been
securely installed.
If you notice the smell of gas at any time after the installation has been completed, turn the water
heater off and contact your gas supplier immediately.
29
Specifications
• Specifications may be changed without prior notice.
• The capacity may differ slightly, depending on the water pressure,
water supply, piping conditions, and water temperature.
Specifications
Specification
Item
Model Name
Type
Installation
Air Supply/Exhaust
Ignition
Operating Pressure
Minimum Flow Rate
Dimensions (Height) x (Width) x (Depth)
Weight
Water Holding Capacity
Connection Sizes
Water Inlet
Hot Water Outlet
Gas Inlet
Condensate Drain
Supply
Power Supply
Consumption
Materials
Casing
Flue Collar
Primary Heat Exchanger
Secondary Heat Exchanger
Safety Devices
NRC1111-DV
NRC1111-OD
Indoor Wall Mounted
Outdoor Wall Mounted
Power Vented
Direct Ignition
15-150 psi
0.5 GPM (2 L/min.)
24.2" (615mm) x 18.3" (464mm) x 9.4" (240mm)
68 lbs.
66 lbs.
0.5 Gallon (2 L)
NPT 3/4"
NPT 3/4”
NPT 3/4”
1/2” Threaded
120 VAC (60Hz)
NG : 78W LP : 80W
NG : 81W LP : 83W
Freeze Prevention 223W Freeze Prevention 223W
Zincified Steel Plate/Polyester Coating
PVC
Stainless Steel
Copper Sheeting, Copper Tubing
Stainless Steel Sheeting, Stainless Steel Tubing
Flame Rod, Thermal Fuse, Lightning Protection
Device (ZNR), Overheat Prevention Device, Freezing
Prevention Device, Fan Rotation Detector
Accessories
Remote Controller, Remote Controller Cord,
Anchoring Screws
Performance
Item
Gas
Consumption
Maximum Performance
NG
LP
Maximum Hot Water Capacity 45°F (25°C) Rise
Capacity Range
Temperature Settings
°F Mode:
°C Mode:
Default Temperature Options
30
Minimum Performance
199,900 btuh
16,000 btuh
199,900 btuh
16,000 btuh
8.4 GPM (32 L/min.)
0.5-11.1 GPM (2-42 L/min.)
100-140°F (In 5°F intervals) (9 Options)
37-48°C (In 1°C intervals),
50,55,60°C (In 5°C intervals) (15 Options)
120°F (50°C), 135°F (57°C), 140°F (60°C)
(Original is 120°F (50°C))
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