Noritz N-0841MC Manual de usuario



N‐0841MC,N‐0842MC,NRC111andNCC199Series

HeatExchangerReplacement



ModelsInclude:N‐0841MC,N‐0841MC‐DV

N‐0842MC,N‐0842MC‐DV

NRC111‐SV,NRC111‐DV

NCC199‐SV,NCC199‐DV



ThisinstructionalmanualisonlyintendedforusebyaqualifiedserviceprofessionalorauthorizedNoritz

ServiceRepresentative.Anyunauthorizeduseofthismanualmayresultinvoidingthewarranty.

PleasecontactNoritzTechnicalSupport(866‐766‐7489)foradditionalsupport.



NoritzAmericaCorporation

11160GraceAvenue,FountainValley,CA92708

Phone866‐766‐7489Fax714‐241‐1196

Page 1

NRC111andNCC199(N‐0841MC,N0842MCSeries)HeatExchangerReplacementProcedure

ProcedureDiagram

1. Removefrontcover



(1) Disconnectelectricalpowertounit

(2) Remove4screws

(3) Turnoffgasandwater

(4) Removefilteranddrainunit

completely

(5) Opendrainportsonthebottomofthe

unit



2. RemoveGFCIandcircuitboard



(1) RemovetwoscrewsthatholdtheGFCI

Plate,onescrewwillhaveaground

wireattached),LetGFCIhangoutside

oftheunit

(2) Removethegroundwirethatistothe

leftofthecircuitboard

(3) Loosenwireanchorfromrightsideof

case

(4) Removethecircuitboard;thereare

twoscrews,oneontopandbottomof

thecircuitboard.Letthecircuitboard

hangoutsideoftheunit



 



Page 2

ProcedureDiagram

3. Removegasvalveassembly



(1) Locate“C”clamponthebottomright

handcorneroftheunitthatattaches

thegasconnectiontothemanifold

plateandremove.

(2) Locateinletgaspipetomanifoldand

pushup.

(3) Locatethelargewiringconnection,

thatattachesthewiresfromthe

manifoldplatetothewiringharness,

anddisconnecttheplug.

(4) Nextlocatethefourbigsilverscrews

holdingthemanifoldplatetothe

burner,therewillbetwoontheright

andleftsideofthemanifoldplate.

Removethosefourscrewsandthe

manifoldplateandpipecanbe

removedandsetaside.

 



4. Unplugallwiresthatattachtothewiring

harnessandthebodyofthewaterheater



(1) Wiringforthefan



Page 3

ProcedureDiagram



(2) LeftSideWiringHarness:Thermalfuse

(2),Freezepreventionheaters(2),

Neutralizersensorplug

(3) RightSideWiringHarness:Highlimit

switch(2),Freezeprevention

heater(2),Freezepreventionsensor

(4) Flamerods(2),ignitionbox

(5) LeftSideOnStainlessSteelHeat

Exchanger(akaSSHE):Freeze

preventionsensor(takeoffwholeclip)

(6) RightSideOnSSHE:Freezeprevention

sensorplugs(2)



 



Page 4

ProcedureDiagram

5. RemovingtheNeutralizer

(1) Removethescrewholdingthemetal

clamponthetopofneutralizer

(2) Removethe3springclampsonthe

hosesoftheneutralizer.1willberight

belowtheSSHEand2willbeonthe

neutralizer(youwillneedaneedle

noseplierstoopenspringclamps)

(3) Pullhosesoffwhereclampswere

removed

(4) Liftuponneutralizerandpulloutand

setaside







6. RemoveWaterPipesInsideUnit



(1) Remove“C”Clampontopoffoam

coveredpipegoingintoSSHE

(2) Remove“C”Clamponbottomof

foamcoveredpipegoingintoFlow

Sensor

(3) RemovePipeandsetaside



Page 5

ProcedureDiagram



(4) Locate¼”drainpipeonrighthandside

ofunitanddisconnectbothsmall“C”

Clampsontopandbottomofpipe

(5) DisconnectFreezepreventionheater

on¼”drainpipe

(6) Remove¼”DrainPipeandsetaside

(7) LeftSide:Disconnect“C”Clampfrom

CopperHeatExchanger(akaCUHE)

andMainWaterControlValve

(8) Pulloutpipe



7. RemoveFluefromTopofUnit



(1) Disconnecttheventingfromtheunit

(2) Removethe4screwsandpulltheFlue

offoftheunitandsetaside



Page 6



ProcedureDiagram

8. Removeheatexchangerfromcase



(1) Removethe2setscrewsonthe

bottomoftheburner

(2) Removetheupperleftandrightset

screwsnearthetopcenterofthecase

(supportbottomofassembly)

(3) SSHE,CUHE,Burner,andFanwill

comeoutinonesection.Remove

fromunit.





9. SeparatetheSSHEfromCUHE



(1) Removethe2screwonthebracket

betweentheSSHEandCUHE

(2) FliptheAssemblyoverandlocatethe

foamcoveredpipeconnectingthetwo

heatexchangers







Page 7

ProcedureDiagram

(3) Removethe2“C”Clampsonthe

endofeachpipeandremovepipe

andsetaside



(4) Removethe9screwsthatlocated

onthebacksideoftheSSHE

(5) SeparatetheSSHEfromtheCUHE



 



10. ReplacingStainlessSteelHeat

Exchanger

Note:IfyouarenotreplacingtheSSHE

thenyoucanskipthisstepandsetSSHE

side.

shippedintheheatexchanger

theSSHEand

LimitSwitchandplaceonnewSSHE



(1) CheckthegasketontheCUHE,ifit

isdamagedreplaceitwithonethat

was

kit

(2) Removethe2FreezePrevention

Heateronthefrontof

placeonnewSSHE

(3) OnRightSideofSSHE,remove

FreezePreventionSensorandHigh



Page 8

ProcedureDiagram

11. ReplacingtheCopperHeatExchanger



(1) Remove12screwsholdingburner

toheatexchanger

(2) SeparateburnerfromCUHE



12. Removeheatexchangercomponents

andputonnewheatexchanger



(1) LeftSide:FreezePreventionHeater

(2) RightSide:HighLimitSwitch

(3) Thermalfuseandfastenersfrom

foursidesofheatexchanger



 



LEFTSIDE

BACK

RIGHTSIDE

FRONT

Page 9

ProcedureDiagram

13. Replacegaskets



(1) Removeoldburnergasketand

replacewithnewone

(2) InspectgasketbetweenSSHEand

CUHEExhaustBox,ifthegasketis

damaged,replaceit.



14. PlacenewO‐RingsonnewCUHEand

PipebetweenCUHEandSSHE



(1) InlettoCUHE

(2) ExittoCUHE

(3) FoamPipethatconnectsSSHEand

CUHE



Page 10

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