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11

Flushing the heat exchanger 

(error code LC or 00)

.

ge.com

5-gallon pail of
virgin, food-grade
white vinegar (or
virgin, food-grade
citric acid)

3/4

Ball Valve

3/4

Union

Check Valve

Pressure Relief Valve

Pressure Regulator

Circulating Pump

Boiler Drain Valve

Solenoid Valve

S

KEY

Water Heater

Gas Supply

V1

V3

V2

V4

H1

H2

H3

Circulating Pump

Cold Water Line

Hot Water Line

n-line

Filter

I

WARNING:

Before performing this action, first remove power 

to the water heater in order to prevent an accidental scald injury.

NOTE: 

GE recommends that this task be performed by a trained service provider.

An “LC” or “00” error code indicates the unit is beginning to have water hardness coat
the heat exchanger and must be flushed. Failure to flush the appliance will cause
damage to the heat exchanger. Damage caused by water hardness is not covered by
the unit’s warranty. After flushing, reset the LC fault code by turning off the power to
the unit and turning the power back on.

Disconnect electrical power to the water heater.

Close the shut-off valves on both the hot water and cold water lines (V3 and V4).

Connect pump outlet hose (H1) to the cold water line at service valve V2.

Connect drain hose (H3) to service valve V1.

Pour approximately 4 gallons of virgin, food-grade white vinegar or citric acid 
into pail.

Place the drain hose (H3) and the hose (H2) to the pump inlet into the cleaning
solution.

Open both service valves (V1 and V2) on the hot water and cold water lines.

Operate the pump and allow the cleaning solution to circulate through the water
heater for 45 minutes.

Turn off the pump.

Rinse the cleaning solution from the water 
heater by:

a.

removing the free end of the drain 
hose (H3) from the pail,

b.

closing service valve V2 and opening
shut-off valve V4 (do not open shut-off 
valve V3),

c.

allowing water to flow through 
the water heater for 5 minutes, 

d.

closing service valve V1 and opening 
shut-off valve V3.

Disconnect all hoses.

Remove the in-line filter at the cold 
water inlet and clean out any residue. 
Place the filter back into the unit. See page 7.

Restore electrical power to the water 
heater.

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9

8

7

6

5

4

3

2

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Consumer S

uppor

t

Tr

oubleshooting Tips

Operating Instructions

Safety Instructions

Содержание GN75DNSRSA

Страница 1: ...e 6 Specifications 12 Technical Data 14 To Set the Water Heater 5 To Turn Off Gas to the Water Heater 5 Water Quality 10 Troubleshooting Tips 13 Consumer Support Consumer Support Back Cover Warranty 1...

Страница 2: ...any gas or electrical appliance Do not touch any electrical switch do not use any phone in your building Clear the room building or area of all occupants Immediately call your gas supplier from a neig...

Страница 3: ...mperature before entering a shower or bath This appliance does not have a pilot It is equipped with an ignition device which automatically lights the burner Do not try to light the burner by hand BEFO...

Страница 4: ...ue to the difference in ground water temperature NOTE We do not recommend installing a remote control outdoors For outdoor unit only installation of the indoor remote control is highly recommended The...

Страница 5: ...he thermostat to the lowest setting Locate the manual gas valve on the side of the water heater Turn the manual valve clockwise to the full OFFposition 3 2 1 CLOSE OPEN FOR YOUR SAFETY READ BEFORE OPE...

Страница 6: ...lding resulting in death Hot water can cause first degree burns with exposure for as little as 3 seconds at 140 F 60 C 20 seconds at 130 F 54 C 8 minutes at 120 F 48 C Test the temperature of the wate...

Страница 7: ...water valves Check for leaks Connect electrical power and turn on the unit 13 12 11 10 9 8 7 6 5 4 3 2 1 Vent System The vent system should be inspected at least annually for blockages or damage See...

Страница 8: ...pletely drain from the system Replace the inlet filter and bleed screw To start the system Open the inlet water valve and check for leaks Open the outlet water valve Plug in or turn on power to the un...

Страница 9: ...g materials are being used Check that nothing is blocking the flue inlet or exhaust Check all vent components for proper connections 11 No ignition Check that the gas is turned on at the water heater...

Страница 10: ...ion the water If you are in a hard water area it is recommended to install a GE water softener prior to the water heater Source Part 143 National Secondary Drinking Water Regulations MAXIMUM LEVEL Tot...

Страница 11: ...ter heater Close the shut off valves on both the hot water and cold water lines V3 and V4 Connect pump outlet hose H1 to the cold water line at service valve V2 Connect drain hose H3 to service valve...

Страница 12: ...ure Setting Maximum Temperature Setting 140 F 60 C Minimum Temperature Setting 98 F 37 C Weight Approximately 49 lbs 22 kg Indoor Units 46 lbs 21 kg Outdoor Units Noise Level 55dB A Electrical Normal...

Страница 13: ...ay have gone below the Water flow might be increased by cleaning the aerators minimum required on the faucets White smoke comes out During colder weather when of the exhaust the exhaust temperature is...

Страница 14: ...14 Operating Instructions Safety Instructions Consumer Support Troubleshooting Tips Technical data PRESSURE DROP CURVE OUTLET FLOW DATA GN75 GN94 GP94 GN75 GN94 GP94...

Страница 15: ...or repair Product not accessible to provide required service Failure of the product installed in a continuous recirculation system If product removed from original installation location Damages malfun...

Страница 16: ...ffect You can purchase it on line anytime or call 800 626 2224 during normal business hours GE Consumer Home Services will still be there after your warranty expires Individuals qualified to service t...

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