Noritz NRCB199DV User manual

SBB80U9-1
Rev. 06/17
Models : NRCB199DV (GHQ-C3201WX-FF US)
NRCB180DV (GHQ-C2801WX-FF US)
CONDENSING GAS COMBI BOILER
Owner’s Guide
NORITZ America Corporation
Thank you for purchasing this Noritz Combi Boiler.
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 - latest edition and
/or the Natural Gas and Propane Installation Code CSA B149.1 -latest edition.
Where required by the authority having jurisdiction, the installation must
conform to the Standard for Controls and Safety Devices for Automatically
Fired Boilers, ANSI/ASME CSD-1.
Noritz America reserves the right to discontinue, or change at any time,
the designs and/or specications of its products without notice.
-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.
FOR USE IN RESIDENTIAL OR MANUFACTURED HOME APPLICATIONS.
WARNING
*SBB80U9*
CERTIFIED
R
Low NOx Approved
by SCAQMD
14 ng/J or 20 ppm
(Natural Gas Only)
APMOR
LOW-LEAD
&T
TM
I

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 Combi Boiler 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 Combi Boiler.
Prohibited
Keepammableproducts:
1.
FarawayfromtheCombiBoiler.
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.
(Continued)
Prohibited
DonotusetheCombi
Boileriftheintake/
exhaustpipeis
displaced,has
holes,isclogged,
oriscorroded.
HotWatertemperatureover125°F(52°C)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, consult with installer.
Prohibited
Prohibited
Donotremoveorblocktheinstalled
safetyreliefvalveforsafeoperation
oftheCombiBoiler.

3
No ame.
(Continued)
WARNING
Be sure
to do.
Whenagasleakisnoticed:
1. Stopuseimmediately
2. Closethegasvalve
3. 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heatingsystem.
3.
TurnoffthepowertotheCombiBoiler.
4. Turnoffgas,return/supplyvalve.
5. CallthenearestNoritzagent
Be sure
to do.
Prohibited
ExplosionHazard;
Ifthesafety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 result in
re or explosion, and personal injury or death
Prohibited
(Continued)
A.ThisCombiBoilerdoesnothave
apilot.Itisequippedwithan
ignitiondevicethatautomatically
lightstheburner.Donottryto
lighttheburnerbyhand.
B.
BEFORE OPERATING smell all
aroundtheCombiBoiler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CombiBoilerif
anyparthasbeenunderwater.
lmmediatelycallaqualied
servicetechniciantoinspectthe
CombiBoilerandtoreplaceany
damagedparts.
Donotallowanyonetochangethe
domestic hot water temperature
whilehotwaterisbeingused.
To prevent scalding, do not change the
water temperature to a higher setting.
Prohibited
Be sure
to do.
Shouldoverheatingoccurorthegas
supplyfailtoshutoff,donotturnoffor
disconnectthepowersupplytotheCombi
Boiler.Instead,shutofftheexternal gas
supplyvalvetotheCombiBoiler.
Do not use the hot water supplied
bytheCombiBoilerfordrinking
purposes.
AftertheCombiBoilerhasbeenoutof
useforalongtimemakesurethatyou
llthecondensatetrapwithwater.
Thisistopreventdangerous exhaust
gasesfromenteringthebuilding.
Failuretollthe condensate trap could
resultinseverepersonalinjuryordeath.
(Refertopage25forfurtherinstructions.)
Be sure
to do.
Be sure
to do.
[Whensupplyingcombustionair
fromtheindoors]
Checkwhetherornottheair
supplyventisblockedwith
dust,trash,atowel,orthelike.
Blocking the opening may result
in incomplete combustion.
Towel
Air supply vent
Checkthetemperature
oftherunninghotwater
beforeenteringtheshower.
Checkthetemperature
beforesteppinginto
thebathtub.
High
Temperature.

4
combi
ImportantSafetyInformation-2
(Continued)
(Continued)
Donotplacetheexhaustventterminal
inanindoorenvironmentbymeansof
adding walls and ceiling (Do not enclose
usingcorrugatedsheets,etc.)
Carbon monoxide poisoning or re may
occur as a result.
Prohibited
Donotplacecombustiblessuchas
laundry,newspapers,oilsetc.nearthe
CombiBoilerortheexhaustventterminal.
Prohibited
CarbonMonoxidePoisoningHazard.
DonotinstallthisCombiBoilerina
recreationalvehicleoronaboat.
DonotinstallthisCombiBoiler
inamobilehomewhenusingSV
conversionkit(“-SV”conguration).
Prohibited
Exhaust vent terminal
Do not touch the power
cordwithwethands.
Electric
Shock.
Don’t touch
with a wet
hand.
Donotallowsmallchildrentoplay
unsupervisedinthebathroom.
Donotallowsmallchildrentobathe
unsupervised.
Prohibited
Exhaust vent terminal
WARNING
Leavetheproperclearancebetween
theCombiBoilerandnearbyobjects
(trees,timber,boxeswithammable
materialsetc.).
Be sure
to do.
Left side:
Min. 3" (75mm)
Right side:
Min. 3" (75mm)
Front:
Sug. 24" (600mm)*
Sug.3" (75mm)
from vent pipe*
Upper:
Min. 12" (300mm)
*Indicates suggested clearances for maintenance.
Ifthisunitwillbeinstalledinalocation
wherehairsprayoraerosolswillbeused,
locate the unit in a separate area
thatissuppliedwithfreshairfrom
outdoors.
Prohibited
Installationandservicemustbe
performedbyaqualiedinstaller,
serviceagencyorthegassupplier.
Be sure
to do.
Donotusecombustiblechemicalssuchas
oil,gasoline,benzeneetc.inthenearthe
CombiBoiler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CombiBoilerortheexhaustvent
terminal.
Donotusehairsprayorspraydetergent
inthevicinityoftheCombiBoiler.
Prohibited
Prohibited
Besurethegas/power
supplied matches the
gasontheratingplate.
e.g.ForNaturalGas
(NRCB199DV (GHQ-C3201WX-FF US) )
Be sure
to do.
Be sure
to do.
[Whensupplyingcombustionair
fromtheindoors]
Checktheairsupplyopening
fordustorobstructions.
Clogged
air supply
opening!!

5
CAUTION
Besuretoelectricallygroundthe
unit.
Keeppowercordfreeofdust.
Ground.
Be sure
to do.
(Continued)
Prohibited
DonotcovertheCombiBoiler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CombiBoiler
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and
exhaustventterminal
orimmediately
afteroperation
oftheCombiBoiler.
Do not install in locations where
excessivedustordebriswillbe
intheair.
Prohibited Don’t
touch.
Prohibited
Topreventburnsorscalding,
turnoffthepowerbuttonandwait
untiltheequipmentcoolsbefore
performingmaintenance.
Be sure
to do.
Contactaqualiedservice
technicianforanynecessary
repairs,serviceormaintenance.
ConsultthenearestNoritzagentif
theCombiBoilerlocationneedsto
bechanged.
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.
Don’t
disassemble
the equipment.
Donotremovethepowerplug.
When the power plug is inserted, the unit automatically
operates the circulation pump for several seconds
when the unit has not been used for approximately
30 days to prevent the circulation pump from
malfunctioning due to build-up of lime deposits.
Be sure
to do.
ReplacetheCombiBoilerwateras
requiredbytheanti-freezemanufacturer.
• Not replacing the Combi Boiler water will cause
rusting and freezing, resulting in damage to the device
and radiator. Repairs resulting from deterioration of
the anti-freeze are not covered by the warranty.
• For replacement of the Combi Boiler water,
contact the installer or a qualied service
technician. Costs for the replacement of the
anti-freeze are not covered by the warranty.
Be sure
to do.
Do not place outdoors
Rain may enter the unit or
the burner re may be blown
by the wind, causing
malfunction or re as a result.
Prohibited
Outdoor
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.
Donotusecondensate,discharged
fromthedrainpipe,fordrinkingor
forconsumptionbyanimals.
Prohibited

6
ImportantSafetyInformation-3
CAUTION
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.24)
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4500ft(1350m)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.26)
Donotusepartsotherthanthosespecied
forthisequipment.
Ifitissnowing,checktheueterminalfor
blockage.
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.
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.( p.31)
Do not run water through the unit when the
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, you’d turn the handle to
the left.
DonotdisassembletheOperationPanel.
Donotusebenzene,oilorfatdetergents
to clean the OperationPanel.
This may cause deformation.
Do not get the Operation Panel wet.
It is not water resistant, water can cause damage.
DonotsplashwaterontheOperationPanel.
DonotexposetheOperationPaneltosteam.
Do not locate the Operation Panel near stoves or
ovens, this may cause damage or failure.

7
 ImportantSafetyInformation....................................................................... 2
Contents......................................................................................................... 7
General Parts
Main Unit.................................................................................................... 8
Operation Panel........................................................................................ 10
Initial Operation......................................................................................... 12
How to Use
 ClockSetting............................................................................................. 13
Setting Domestic Hot Water Temperature (DHW).................................. 14
Setting Heating Temperature................................................................... 16
Setting DHW Preheat Timer..................................................................... 17
 ActivateDHWPreheat.............................................................................. 19
 CustomizableSettings<UserMode>...................................................... 20
 GuideforFunctions..................................................................................... 22
View Technical Data..................................................................................... 23
 PreventingDamagefromFreezing............................................................. 24
Regular Maintenance................................................................................... 28
 Troubleshooting........................................................................................... 32
 Follow-upService........................................................................................ 37
 Specications............................................................................................... 39
Contents

8
Main Unit
General Parts -1
ExhaustPipe
IntakePipe
* Theaboveillustrationshowsanexampleofinstallation.
The exact installation conguration may be slightly different.
Operation Panel
FrontCover
WaterDrainValve
(with Water Filter)
WaterDrainValve
(with Water Filter)
HeatingSupply
AutoFeederShutoffValve
WaterDrainValve
Heating Return
Auto Feeder Inlet
(Inside Heating Return Inlet) (p.30)
(Inside Auto Feeder Inlet) (p.29)
Discharges the condensate.
(Inside Domestic Water Inlet)
(p.29)
GasSupplyValve
WaterDrainValve
WaterSupplyValve
Hot Water Outlet (DHW)
PressureReliefValve(DHW)
Drain Pipe
Cold Water Inlet (DHW)
WaterDrainValve
(with Water Filter)
PressureReliefValve(Heating)
Drain Pipe

9
TheCondensingGasCombiBoiler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 (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 ow.
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.
TheCondensingGasCombiBoiler
tendstoshowwhitesteam.
After the exhaust gas passes through the
secondary heat exchanger, the low temperature
and high moisture content 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.
Discharges the condensate.

10
Operation Panel (RC-B201M)
General Parts -2
The Operation Panel will emit a tone when a button is pressed.
( Next page)
Use to check
information about the
Combi Boiler. ( p. 23 )
Activates the PREHEAT
“ON” or “OFF” setting as
determined by the user
selected schedule.
( p.17)
For turning the
Combi Boiler ON/OFF.
Returns to the previous
screen while making
system settings or
checking status.
Confirms changes
made by the user.
Use to change the
User Mode settings.
( .20)
For setting and checking
the Heating / Domestic
Hot Water (DHW)
temperature.( .14)
SETTINGS Button
TEMP Button
BACK Button
DisplayScreen
PREHEATButton/
Indicator(Orange)
PowerON/OFFButton /
Indicator(Orange)
MAINTENANCE Button
ENTER Button

11
When Outdoor Reset is
activated, the icon is lit.
During normal operation,
the set temperature
is displayed.
A number will flash if a
failure occurs.
( p.36)
* The Display Screen shown below is for illustration purposes only.
The actual display will vary depending on how the Combi Boiler is being used.
When burning, the icon
is lit.
DisplayScreen
Burner ON Icon
Outdoor Reset Icon
Heating Icon
DHW Icon
Temperature Setting Error CodeClock
Note: As shipped from the factory, the Operation Panel is set to display in °F and gallons.
To adjust the display to °C and liters, refer to the Installation Manual.
* Before use, remove the protective sheet from the Operation Panel surface.
For turning the
Combi Boiler ON/OFF.
When unit operates
freeze prevention,
the icon is lit.
When DHW Preheat is
activated, the icon is lit.
When setting the unit to 125°F
(55°C in °C mode) or higher,
the icon is lit. ( p.14)
FreezePreventionIcon
DHW Preheat Icon
DHW High Temperature Icon

12
Initial Operation
Before the rst use of your Combi Boiler do the following:
Follow steps 1through5.
1Open the water supply valve and
the auto feeder shutoff valve.
Open a hot water xture to conrm that
water is available, and then close the
xture again.
The unit starts auto feeding for heating.
The display will change to the following
rotational pattern.
This is normal operation. When auto
feeding is complete, the rotational
pattern turns off automatically.
3Open the gas supply valve.
Hot water xture
2
Turn on the power.
4
5
Donottouchwithwethands.
CLOSED OPEN

13
ClockSetting
* This setting can be done regardless of
whether the button is ON/OFF.
1
2
3
After 1 sec.
4
Press the button.
Press the button.
Press the button.
1) Press the buttons
untilthecorrecttimeisdisplayed.
2) Press the buttonto
savethecurrentsetting.
* Each press of the button changes the
time in 1-minute increments. Press and
hold the button will change the time in
10-minute increments.
* If the display is left untouched for
approximately 30 seconds without pressing
the
button
, the setting will be completed.
When the button is pressed, the
screen display will show "CLS".
Operation ScreenDisplay Description
* In the event of a power outage or after disconnecting power to the Combi Boiler, the Combi
Boiler stores the time at regular intervals.
If this happens and power is restored, the clock time will be blinking.
If you find the clock blinking, readjust the clock time.
(e.g.: 10:15AM)
(CLS:CLock Setting)
1
4
2,3,4

14
* The indicator is lit.
*
To return to the home screen, press the
button or let panel sit for
approximately 20 seconds.
1
Press the buttonON.
2
Press the buttontwice.
The current "DHW
Temperature Setting" and
"DHWIcon"willbeblinking.
Set the temperature using
the buttons
.
(e.g.: 10:15AM)
(e.g.: 110°F)
Setting Domestic Hot Water Temperature (DHW)
Operation ScreenDisplay Description
OperationPanelDisplay
High Temperature
Topreventscalding:
Flashes for 10 sec
DANGER
HotWatertemperaturesover125°F(52°C)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, check with installer.
• When setting the unit to 125°F (55°C in °C mode) or higher,
the DHW High Temperature Icon will ash 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.
1
2
2

15
Setting Domestic Hot Water Temperature (DHW)
(°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 xtures incorporate mixing valves, set the temperature higher than usual.
* For most residential applications, the recommended temperature setting is 120°F (50°C in °C mode) or less.
* Consult local codes for minimum operating temperatures.
 90 95 100 105 110 115 120 125 130 135 140
Shower, hot water supply, etc.
Washing
dishes, etc.
High temperature
The maximum output temperature can be
set using the Operation Panel. ( p.20)
(°C (°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 40°C (104°F)
Shower, hot water supply, etc.
Washing
dishes, etc.
High
temperature
32 35 37 38 39 40 41 42 43 44 45 46 47 48 50 55 60
(90)  (95) (99)  (100) (102) (104) (106) (108) (109) (111) (113) (115) (117) (118) (122) (131) (140)
The maximum output temperature
can be set using the Operation
Panel. ( p.20)
When using °F mode:
When using °C mode:
Note : Noritz recommends that water temperature is set as low as possible to prevent scale build-up in
the heat exchanger.

16
Setting Heating Temperature
• Blinking ( ) on the Operation Panel is not an Error Code.
•
The unit has the "Outdoor Reset (Energy Saving)" feature, but this feature is disabled (Factory Default).
• To enable, contact your installer or Noritz America Technical Support at 866-766-7489.
( ) is lit on the Operation Panel, the Outdoor Reset (Energy Saving) is enabled.
• Heating Temperature is changing automatically based on the Outdoor Temperature.
* Refer to page 22 for details.
The following Heating Temperature Setting can be changed when the “Outdoor Reset” is disabled.
The temperature setting below is example.
The temperature setting necessary depends on the usage, the length of piping and the time of year.
* Heating Temperature range depends on Installer Mode Setting.
Refer to the Installation Manual for details.
* The indicator is lit.
*
To return to the home screen, press the
button or let panel sit for
approximately 20 seconds.
1
Press the buttonON.
2
Press the buttononce.
The current "Heating
Temperature Setting" and
"HeatingIcon"willbeblinking.
(e.g.: 10:15AM)
(e.g.: 180°F)
Operation ScreenDisplay Description
General temperature range (Factory Default*)
°F
°C
100 • • • • • • • • • • • • • • • • • • • • •
• • • • • • • • • • • • • • • • • • • • •
38
180
Initial factory setting
82
1
2
2
Set the temperature using
the buttons
.

17
1
Setting DHW Preheat Timer
Thisexampleshownissettingthe"ONtime"and"OFFtime"to6:00PMand7:00PM.
2
3
4
Press and hold
the buttonfor
approximately2seconds.
* Time changes in 30-minute increments
when each button is pressed.
* If you want to set the ON time OFF , select
the desired time by using the buttons.
And then press button .
* To return to the home screen, press the
button or let panel sit for
approximately 20 seconds.
* DHW Preheat Icon will appear to confirm
when the preheat function is scheduled for
that 30 minute block. If it is not present,
the preheat function is off.
* In order to use the DHW Preheat function,
the clock must be set first. The DHW Preheat
Timer is disabled until the clock is set.
* When entering DHW Preheat Timer setting
mode, the clock display will be blinking.
* When the preheat function is activated,
you cannot set DHW Preheat Timer.
Press the buttonON.
1 ) Press the buttons
until ‘the desired time’
isdisplayed.
2)
Press the buttonto
savethecurrentsetting.
(DHW Preheat Icon is lit)
1 )
Press the buttons
until ‘the desired time’
isdisplayed.
2) Press the buttonto
savethecurrentsetting.
(DHW Preheat Icon is lit)
(e.g.: 10:15AM)
(e.g.: 12:00PM)
(e.g.: 6:00PM)
(e.g.: 6:30PM)
(e.g.: 6:00PM)
(e.g.: 6:30PM)
1)
1)
2)
2)
12 123456
AM
78 91011
12 123456
PM
78 91011
e.g.DHWPreheatisscheduledtorun6:00PM-7:00PM.
1
3,4
2
3,4

18
e.g.DHWPreheatisscheduledtorun7:00AM-8:00AM,11:30AM-1:00PMand6:00PM-9:00PM.
12 123456
AM
78 91
01
1
12 123456
PM
78 91
01
1
ScreenDisplay ScreenDisplay ScreenDisplay
1) 1) 1)
3) 3) 3)
2) 2) 2)
4) 4) 4)
6)
5) 5)
7)
8)

19
DHW Preheat Icon
* When Preheat is activated, indicator is lit.
* To deactivate DHW Preheat, Press the button.
* When Operation Panel is OFF, you can not activate
DHW Preheat.
1
2Press the button.
Operation Description
ActivateDHWPreheat
Press the buttonON.
WhenPreheatisoperating,
DHWPreheatIconislit.
ToConfirmDHWPreheatOperation
ScreenDisplay ScreenDisplay ScreenDisplay
1
2

20
Customizable Settings <User Mode>
Adjusting the DHW Maximum
Output Temperature.
Setting completed
1
3
2
4
(e.g.: 120°F)
The DHW maximum output
temperature can be limited to prevent
discharging hot water at too high of a
temperature.
button OFF.
The Operation Panel must be off.
Press the
Change the
setting using the buttons.
[For Fahrenheit (°F)]
90 - 140°F (In 5°F intervals)
[For Celsius (°C)]
32, 35, 37 - 48°C (In 1°C intervals),
50,55,60°C
(Initial setting=120°F / 50°C)
Press the button,
Select
using the buttons.
Press the button.
The "UserMode" screen appears.
Select using
the buttons,
and then
press the button.
After 1 sec.
(dtL:DHW Max Te mperature Limitation)
To return to the home screen, press the button three times
or let it sit for approximately 30 seconds.
To change other settings, Select option and press the button.
3
1
2
ON:the Operation Panel is not muted.
OFF:the Operation Panel is muted.
Muting the Operation Panel.
The Operation Panel can be muted
so that no tone is emitted when a
button is pressed.
Press the button,
Select
using the buttons.
Press the button.
The "UserMode" screen appears.
Select using
After 1 sec.
(SoS:Sound Setting)
the buttons,
and then
press the button.
Change the setting
using the buttons.
(e.g.: ON)
(Default setting=ON)
Setting completed