IMPORTANTSAFETYINFORMATION.
READALL INSTRUCTIONSBEFOREUSING.
INSTALLER: Leave this manual with the
appliance.
CONSUMER: Retain this manual for future
reference.
WARNING: iftheinformation
in this manual is not followed exactly,
a fire or explosion may result causing
property damage, personal injury
or death.
-- Do not store or use gasoline or other
flammable vapors and liquids in the
vicinitg of this or ang other appliance.
- WHAT TODO IF YOU
SMELL GAS
[] Do not trg to light a match, or cigarette,
or turn on ang gas or electrical appliance.
[]Do not touch ang electrical switch;
do not use ang phone in gour building.
[] Clear the room, building or area of all
occupants.
[] Immediatelg call gout gas supplier from
a neighbor's phone. Follow the gas
supplier's instructions carefullg.
ANSI Z21103 • CSA 43
] lf gou cannot reach gour gas supplier,
call the fire department.
-- Installation and service must be
performed bg a qualified installer,
service agencg or the gas supplier.
WARNING! or oursafety,
the information in this manual must be followed to
minimize the risk of fire or explosion, electric shock,
or to prevent propertg domoge, personol injurg or
loss of life.
Error codes, ge.com
Thiswater heater hasthe abilitgto check its own operation
continuouslg. If a fault occurs,an error code will flash on the
displag of the remote control onlg when the water isrunning.
Thisassistswith diagnosing the fault, and mag enable gou to
overcome a problem without a servicecall. Pleaseidentifg the
code displaged when inquiring about service.
Error Code Table
WARNING: Some of the checks below mag
need to be done bg a qualified service technician.
02 No burner operation during freeze •
protection mode
10 Air supplg or exhaust blockage •
11 No ignition •
12 Flame failure •
14 Thermal fuse
16 Over temperature warning
32-72
LC(001 Scale buildup in heat exchanger
No code Nothing happens when water flow is activated
Checkthat the gas isturned on at the water heater,gas meter or cglindeE
Ifthesgstem is propane, make sure gas is inthe tank.
Callfor service.
EnsureGE-approved venting materials are being used.
Checkthat nothing is blocking the flue inlet or exhaust.
Checkall vent components for proper connections.
Checkthat the gas isturned on at the water heater,gas meter or cglindeE
Ifthesgstem is propane, make sure gas is inthe tank.
Ensureappliance is properlg grounded.
Checkthat the gas isturned on at the water heater,gas meter or cglindeE
Checkfor obstructions in the flue outlet. If the sgstem ispropane, make sure
gas is in the tank.
Ensureappliance is properlg grounded.
Callfor service.
Checkfor restrictions in air flow around unit and vent outlet.
Checkfor foreign materials in exhaust piping.
Callfor service.
Seepage 11 for Flushing Procedures.
Clean inletwater supplg filtec
On new installations, ensure hot and cold water linesare not reversed.
Ensuregou have at least the minimum flow rate required to firethe unit.
9
Water quality.
Carefor gour water heater should include
evaluation of water qualitg. Ifthe water exceeds
the target levelsprovided in the table,gou should
treat or condition the water.
If gou are in a hard water area,it isrecommended
to installa GEwater softener prior to the water
heater
fb_
4_
_P aterfilter
Watersoftener
MAXIMUM LEVEL
Total Hardness Up to 200 mg/L (12 grains)
Aluminum* Up to 0.2 mg/L
Chlorides* Up to 250 mg/L
Copper* Up to 1.0 mg/L
Iron* Up to 0.3 mg/L
Manganese* Up to 0.05 mg/L
pH* 6.5 to 8.5
TDS(Total Dissolved Solids)* Up to 500 mg/L
Zinc* Up to 5 mg/L
* Source:Part 1/43National Secondarg Drinking Water Regulations
10
Flushing the heat exchanger(errorcode LCor00). ge.com
-& WARNING: Before performing this action,first remove power
to the water heater in order to prevent an accidental scald injury.
NOTE:GErecommends that this task be performed bg a trained serviceproviden
An "LC"or "00"errorcode indicatesthe unit isbeginning to have water hardness coat
the heat exchanger and must be flushed. Failureto flush the appliance will cause
damage to the heat exchanger.Damage caused bg water hardness isnot covered bg
the unit'swarrantg. After flushing,reset the LCfault code bg turning off the power to
the unit and turning the power back on.
E] Disconnectelectrical power to the water heaten
[] Closethe shut-off valves on both the hotwater and cold water lines (V3and V4).
I-_ Connectpump outlet hose (H1)to the cold water line at service valve V2.
[] Connect drain hose (H3)to servicevalveV1.
[] Pourapproximatelg 4 gallonsof virgin, food-grade white vinegar or citric acid
into pail.
[] Placethe drain hose (H3)and the hose (H2)to the pump inletinto the cleaning
solution.
[] Openboth service valves(Vl and V2)on the hot water and cold water lines.
F] Operate the pump and allow the cleaning solution to circulate through the water
heater for 45 minutes.
[] Turn off the pump.
O O
Water Heater
O O
Gas Supply
Vl
-0 V4 I
[T_ Rinsethe cleaning solution from the water
heater bg:
a. removing the free end of the drain
hose(H3)from the pail,
b. closingservice valve V2and opening
shut-off valve V4(donot open shut-off
valve V3),
c. allowing water to flow through
the water heater for 5 minutes,
d. closing service valve Vl and opening
shut-off valve VS.
D Disconnectall hoses.
i_ Removethe in-line filterat the cold
water inlet and clean out ang residue.
Placethe filter back into the unit. Seepage 7.
i_l Restoreelectrical power to the water
heater.
KEY
151 3/4"BallValve
3/4" Union
?"'--d Check Valve
Pressure Regulator
Circulating Pump
t_:_ Boiler Drain Valve
Hot Water Line
Cold Water Line
H2
Circulating
5 gallon pail of
virgin,food grade
white vinegar {or
virgin,food grade
citric acid)
z_ Pressure Relief Valve
[_ Solenoid Valve
11
Before you callfor service.., gecom
Troubleshooting Tips
Save time and mone_l! Review the chart below first and you
may not need to call for service.
Possible Causes What To Do
Thereis no hot water There isno gas, water or • Hake sure gas,water and power are turned on.
when tap is opened electricitg flowing to unit.
Thesgstemrequires • Ensurefaucet aerators are clean and faucet flows at least
approximatelg 0.6gpm 0.6gpm of hot water.
minimum flow to activate • Duringsummer months, increase the temperature setting
the heater, at the control or increasethe water flow.
Water gets cold when If the fiow from the tap was • Duringsummer months, increase the temperature setting
hot water is being used adjusted to lessen it, the flow at the controlor increasethe water flow.
mag have gone below the • Water flow might be increased bg cleaning the aerators
minimum required, on the faucets.
White smoke comes out During colder weather, when
ofthe exhaust the exhausttemperature ismuch
hotter than the outside air, the
exhaust fumes condense,
producing water vapor.
When o hot tap is
opened, hot water
does not come out
immediately
After hot water top is
turned off, fan on water
heater continues to run
Display shows
temperatures between
37°and 60_.
Hot water must travel through the
plumbing from the water heater to
the faucet, The time period for hot
water to reach the fixture is determined
bg the amount of water in the plumbing
sgstem between the water heater and the
fixture, water pressure and the flow rate
of the fixture.
Thefan isdesignedto continue running
for a short time after the flow of water stops.
This is to ensure constant water temperatures
during rapid starting and stopping, as well as
exhausting ang residual gas flue products
from the unit,
Control is displaging temperature • Change control to Fahrenheit.Seepage 6.
in Celsius.
13
Technicaldata.
PRESSURE DROP CURVE
30
25
20
Q.
o
.J
15
CD
Q_
Q)
_ lO
£L
0
0.0 2.0 4.0 6.0 8.0 10.0
OUTLET FLOW DATA
Water Flow (gpm)
/
GN75 ]
/
_ GN94/GP94
60
50 "_
..C
40 "-_
d
30 ¢
20 ,-
(3-
10
o
03
GO
o
\
__k_
w
m
0
25 50 75 100 125 150
ww
x,
\x
\
\
%\
I I
delta T - Temperature Rise (°F)
I I
w __m
m
__m
m
14
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