Noritz NR71-SV User manual

SBA8654
Rev. 01/11
Models: NR71-SV, NR71-OD* (For USA and Canada)
NR66-SV, NR66-OD* (For USA and Canada)
NR50-OD* (For USA only)
TANKLESS GAS WATER HEATER
Owner’s Guide
NORITZ America Corporation
-Donotstoreorusegasolineorotherammable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redepartment.
-Installationandservicemustbeperformedbyaqualiedinstaller,service
agencyorthegassupplier.
If the information in this manual is not followed exactly, a re or explosion
may result causing property damage, personal injury, or death.
WARNING
*SBA8654*
Thank you for purchasing this Noritz Tankless Gas Water Heater. Before
using, please:
Read this manual completely for operation instructions.
Completely ll 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 Construc-
tion and Safety Standard, Title 24 CFR, Part 3280 or the Canadian Standard CAN/
CSA-Z240 MH Mobile Homes, Series M86.(NR71-OD, NR66-OD only)
Noritz America reserves the right to discontinue, or change at any time, the
designs and/or specications of its products without notice.
* FOR USE IN RESIDENTIAL, COMMERCIAL, OR MANUFACTURED HOME APPLICATIONS.

2
Prohibited Don’t
touch.
Don’t
disassemble
the equipment.
Don’t touch
with a wet
hand.
No ame.
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ammableliquidswillexplodeandcatchrecausingdeathorsevereburns.
Do not use or store ammable products such as gasoline, solvents or
adhesives in the same room or area near the water heater.
Prohibited
Keepammable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oor.
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 ame.
(Continued)
Prohibited
WARNING
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re:
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 water temperature to a higher setting.
Prohibited
Checkthetemperature
oftherunninghotwater
beforeenteringthe
shower.
Checkthetemperature
beforesteppinginto
thebathtub.
High
Temperature.
ExplosionHazard;
Ifthetemperatureandpressurerelief
valveisdrippingorleaking,havea
qualiedservicetechnicianreplaceit.
Donotplugorremovethevalve.
Failure to follow these instructions can re-
sult in re or explosion, and personal injury
or death.
Prohibited
(Continued)
Prohibited
[NR71-OD,NR66-OD,NR50-OD]
DoNotInstallIndoors.
This will cause carbon
monoxide poisoning and
a potential re hazard.
Indoor
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oorbecausesome
gasisheavierthanairandwillsettle
ontheoor.
 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re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qualied
servicetechnician.Forceor
attempted repair may result in a
reorexplosion.
D. Donotusethiswaterheaterif
anyparthasbeenunderwater.
lmmediatelycallaqualiedservice
technician to inspect the water
heater and to replace any damaged
parts.
[NR71-SV,NR66-SV]
Donotusethewaterheaterif
theexhaustpipeisdisplaced,
has holes, is
clogged or
iscorroded.

4
ImportantSafetyInformation-2
(Continued)
air supply
vent
[Wheninstallingindoors
(NR71-SV,NR66-SV)]
Checktheairsupply 
ventfordustor 
obstructions.
Be sure
to do.
Be sure the gas/power
supplied matches the
gasontheratingplate.
Ex.ForNaturalGasNR71-SV
Installationandservicemustbe
performedbyaqualiedinstaller,
serviceagencyorthegassupplier.
Be sure
to do.
Be sure
to do.
(Continued)
Leavetheproperclearancebetweenthe
waterheaterandnearbyobjects(trees,
timber,boxeswithammablematerialsetc.).
Be sure
to do.
*Indicates suggested clearances for maintenance.
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 re may
occur as a result.
Exhaust
vent terminal
Outdoor Unit
Prohibited
Donotplacecombustiblessuchas
laundry,newspapers,oilsetc.nearthe
heaterortheexhaustventterminal.
Prohibited
Donotusecombustiblechemicalssuch
asoil,gasoline,benzeneetc.inthenear
theheaterortheexhaustventterminal.
Do not store or use gasoline or other
ammablevaporsandliquidsinthe
vicinityofthisoranyotherappliance.
Prohibited
Prohibited
Do not place or use a spray can
neartheheaterortheexhaustvent
terminal.
Prohibited
Left side:
Min. 6" Right side:
Min. 6"
Front:
Sug. 24"
Upper: Min. 36"
[Wheninstallingindoors(NR71-SV,NR66-SV)]
[Wheninstallingoutdoors]
180,000 BTU
25,000 BTU 177
4.0
0.55 2.25
10.5
670
15 150
2
NR71-SV
Left side: Min. 2" Right side:
Min. 2"
Upper: Min. 12"
Front: Sug. 24"*
Sug. 3" from
vent pipe
[NR71-SV,NR66-SVonly]
CarbonMonoxidePoisoningHazard.Do
notinstallthiswaterheaterinamobile
home,recreationvehicleoronaboat.
Prohibited
Prohibited
[NR71-OD,NR66-OD,NR50-ODonly]
CarbonMonoxidePoisoningHazard.
Do not install this water heater in a
recreationalvehicleoronaboat.
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 seperate area that is
suppliedwithfreshairfromoutdoors.
Prohibited
WARNING
Exhaust vent terminal
(indoor installation)
Unit

5
CAUTION
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
(Continued)
Prohibited
Donotcoverthewaterheaterand
theexhaustventterminal,storetrash
ordebrisnearit,orinanywayblock
theowoffreshairtotheunit.
Donotturnoffthewaterheater
whilesomeoneisbathing.
Prohibited
Donotuseabrokenormodied
powercord.Donotbind,bendor
stretchpowercords.
Donotscratch,modify,orsubject
themtoimpactorforce.
Donottouchtheexhaustvent(pipe,
terminal)duringorimmediatelyafter
operationofthewaterheater.
Do not install in locations where
excessivedustordebriswillbe
intheair.
Prohibited Don’t
touch.
Prohibited
Be sure
to do.
Do not allow small children to play
unsupervisedinthebathroom.
Donotallowsmallchildrentobathe
unsupervised.
Do not use hair spray or spray
detergentinthevicinityofthe
heater.
Do not touch the power
cordwithwethands.
Prohibited
Electric
Shock.
Don’t touch
with a wet
hand.
Prohibited
ContactNoritzbeforeusingwith
asolarpre-heater.
Contactaqualiedservice
technicianforanynecessary
repairs,serviceormaintenance.
ConsultthenearestNoritzagentif
the water heater location needs to
bechanged.
Don’t
disassemble
the equipment.
Be sure
to do.
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.
Topreventburnsorscalding,turn off
thepowerbuttonorpowersupply and
waituntiltheequipmentcoolsbefore
performingmaintenance.
Thegasconversionkitshallbeinstalledbya
qualied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reor
explosionortopreventpropertydamage,personal
injury,ordeath.Thequalied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speciedinthemanufacturer’s
instructionssuppliedwiththekit.

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rstuseofhotwaterfromthe
unitinthemorning.
Cleanthelter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 re 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.(2000ft.forNR50-OD)above
sealevel.
For installations at higher elevations, contact Noritz
America for Instructions.
Checkignitionduringuseandextinction
afteruse.
Do not run water through the unit when
unitisnoton.
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 xtures or valves, discharge
water setting the handle completely
to the water side.
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specied
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
General Parts
Main Unit.................................................................................................... 8
Remote Controller..................................................................................... 9
Initial Operation............................................................................................ 10
How to Use (Not using the remote controller)
Setting and Using the Water Heater........................................................ 11
How to Use (Using the remote controller)
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................................................................................... 20
 Troubleshooting........................................................................................... 22
 Follow-upService........................................................................................ 27
 Specications............................................................................................... 29
Contents

8
NR71-SV, NR66-SV
Indoor/Outdoor Wall Mounted, Power Vented Model
* Theaboveillustrationshowsanexampleofinstallation.
The exact installation conguration 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.21)
PressureReliefValve
General Parts
NR71-OD, NR66-OD, NR50-OD
Outdoor Wall Mounted, Power Vented Model
ExhaustVent
FrontCover
Air Inlet
WaterSupplyValve
GasSupplyValve
WaterDrainValve(withWaterFilter)
(Inside Water Inlet) (p.21)
PressureReliefValve
(Ex. NR71-SV)
(Ex. NR71-OD)

9
RemoteController(RC-7649M)<Optional>
For setting the hot
water temperature,
the ow meter alarm,
and other settings.
PowerOn/OffButton
For turning the
heater on and off.
Flow Meter Alarm Set Button
For setting the ow
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 ash
after hitting the ow
meter alarm set button.
(p.15)
Error Code
When this indicator is lit,
the hot water temperature
can be set. (p.12)
Theillustrationbelowshowstheremotecontrollerdisplay.Whatisactuallydisplayed
dependsonhowthewaterheaterisset.
A number will ash if
a failure occurs.
(p.26)
Priority Indicator
Burner On Indicator
When burning, the
indicator is lit.
( p.13and15)

10
(Ex. NR71-SV)
Initial Operation
Before the rst use of your water heater, make the following preparations.
Follow steps 1 through 4.
1Open the water supply valve.
Open a hot water xture to conrm that
water is available, and then close the
xture again.
3Open the gas supply valve.
Hot water xture
2
Turn on the power.
CLOSED
4
OPEN
Donottouchwithwethands.