Flushing the Heat Exchange (Error Code: LC or 00)

An “LC” or “00” error code indicates the unit is beginning to lime up and must be flushed. Failure to flush the appliance will cause damage to the heat exchanger. Damage caused by lime buildup 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.

1.

Disconnect electrical power to the water heater.

2.

Close the shutoff valves on both the hot water and cold

 

water lines (V3 and V4).

3.

Connect pump outlet hose (H1) to the cold water line at

 

service valve (V2).

4.

Connect drain hose (H3) to service valve (V1).

5.

Pour approximately 4 gallons of virgin, food grade, white

 

vinegar or citric acid into pail.

6.

Place the drain hose (H3) and the hose (H2) to the pump

 

inlet into the cleaning solution.

7.

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

 

cold water lines.

8.

Operate the pump and allow the cleaning solution to

 

circulate through the water heater for at least 45 minutes.

9.

Turn off the pump.

10.

Rinse the cleaning solution from the water heater as follows:

 

a. remove the free end of the drain hose (H3) from the pail

 

b. close service valve, (V2), and open shutoff valve, (V4). Do

 

not open shutoff valve, (V3).

Rinnai

Water Heater

 

c. allow water to flow through the water heater for 5 minutes

 

d. close service valve, (V1), and open shutoff valve, (V3).

11.

Disconnect all hoses.

12.

With (V4) closed, remove the in-line filter at the cold water

 

inlet and clean out any residue. Place filter back into unit

 

and open (V4).

13.

Restore electrical power to the water heater.

H3

In-line

Filter

V1 V2

V4

V3

Gas Supply

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

 

KEY

3/4" Ball Valve

Pressure Regulator

 

3/4" Union

Circulating Pump

Check Valve

Boiler Drain Valve

Pressure Relief Valve

S Solenoid Valve

Cold Water Line Hot Water Line

H2

H1

Circulating Pump

16

VA Series Outdoor LS Manual

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Rinnai R98LSE-ASME installation manual Flushing the Heat Exchange Error Code LC or, Rinnai Water Heater
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R98LSE-ASME specifications

The Rinnai R98LSE-ASME is a high-efficiency tankless water heater that stands out for its powerful performance and advanced technology. This model is particularly designed to meet the demands of residential and commercial applications, delivering consistent hot water whenever it is needed. With a maximum flow rate of 9.8 gallons per minute, it is able to provide hot water for multiple outlets simultaneously, making it an excellent choice for busy households and commercial settings.

One of the main features of the Rinnai R98LSE-ASME is its Energy Star rating, which signifies its exceptional energy efficiency. This rating not only helps reduce energy bills but also minimizes the environmental impact by consuming less gas over time. The unit is engineered with advanced condensing technology, which captures and reuses heat from exhaust gases, enhancing efficiency and cutting waste.

The R98LSE-ASME operates on a natural gas or propane option, allowing for flexibility depending on the available fuel supply. Its powerful burner system can quickly heat water to the desired temperature, ensuring that there's no waiting time for hot water. Additionally, the unit is designed with a temperature lock feature, which allows users to set and maintain their preferred water temperature easily, enhancing safety and convenience, especially in households with children.

Installation of the Rinnai R98LSE-ASME is straightforward, as it comes with a detailed manual and can be fitted into various environments, including closets and small spaces, due to its compact design. This versatility provides significant savings on space compared to traditional tank water heaters.

Safety is also a priority for Rinnai. The R98LSE-ASME includes a comprehensive set of safety features such as overheat protection, freeze protection, and built-in diagnostic codes for quick troubleshooting. This ensures reliable operation and peace of mind for users.

In summary, the Rinnai R98LSE-ASME is a high-performance tankless water heater that combines efficiency, reliability, and advanced technology. With features such as a high flow rate, Energy Star certification, and robust safety measures, it is well-suited for both residential and commercial applications, making it a worthy investment for anyone seeking a dependable hot water solution.
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