J‐S180F/J‐S199F 37
Water Heater
Pressure Relief Valve
3/4" Ball Valve
3/4" Union
Check Valve
S
Pressure Regulator
Circulating Pump
Solenoid Valve
Boiler Drain Valve
KE
G
a
s
S
u
p
p
ly
V1
V3
V2
V4
H1
H2
H3
Circulating Pump
C
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W
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Rinnai
An“LC”or“00”diagnosccodeindicatestheunitisbeginningtolimeupandmustbeflushed.Failuretoflush
theappliancewillcausedamagetotheheatexchanger.Damagecausedbylimebuild‐upisnotcoveredbythe
unit’swarranty.Aerflushing,resettheLCcod
ebyturningoffthepowertotheunitandturningthepower
backon.
1. Disconnectelectricalpowertothewaterheater.
2. Closetheshutoffvalvesonboththehotwaterand
coldwaterlines(V3andV4).
3. Connectpumpoutlethose(H1)tothecoldwater
lineatservicevalve(V2
).
4. Connectdrainhose(H3)toservicevalve(V1).
5. Pour4gallonsofundilutedvirgin,foodgrade,white
vinegarintopail.
6. Placethedrainhose(H3)andthehose(H2)tothe
pumpinletintothecleaningsoluon.
7. Openbothse rvicevalves(V1andV2
)onthehot
waterandcoldwaterlines.
8. Operatethepumpandallowthecleaningsoluonto
circulatethroughthewaterheaterforatleast1
houratarateof4gallonsperminute(15.1litersper
minute).
9. Turnoffthepump.
10. Rinsethecle
aningsoluonfromthewaterheateras
follows:
a. Removethefreeendofthedrainhose(H3)from
thepail.Placeinsinkoroutsidetodrain.
b. Closeservicevalve,(V2),andopenshutoffvalve,
(V4).Donotopenshutoffvalve,(V3).
c. Allowwatertoflowthroug
hthewaterheaterfor
5minutes.
d. Closeshutoffvalve(V4).Whenunithasfinished
drainingremovethein‐linefilteratthecoldwater
inletandcleanoutanyresidue.Placefilterback
intounitandopenvalve(V4).
FlushingtheHeatExchanger
e. Closeservicevalve,(V1),
andopenshutoffvalve,(V3).
11. Disconnectallhoses.
12. Restoreelectricalpowertothe
waterheater.
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