Freeze Protection Piping

Manual draining of the water heater

If the water heater is not going to be used during a period of possible freezing weather, it is recommended that the water inside the water heater be drained.

To manually drain the water:

1.Shut off cold water supply and gas supply.

2.Turn off the temperature controller.

3.Disconnect the power to the water heater.

4.Open hot water drain plug at the hot water outlet.

5.Remove water filter to drain the cold water.

If an isolation kit is installed, remove the drain caps on both isolation valves and open both valves above the caps (blue and red handles).

Water	Hot water	Hot water	Water
drain	outlet	drain plug*	filter
plug

6.Unscrew the water drain plug from the drain line next to the hot water outlet.

7.Remove the condensate trap drain plug and allow to drain.

To resume normal operation:

1.Confirm that all water drain plugs are removed, that the gas supply is turned off, and that all taps are closed.

2.Insert the condensate trap drain plug.

3.Screw in the water drain plugs.

If the isolation kit was used to drain the unit, replace the drain caps and close both isolation valves (blue and red handles).

4.Screw in the water filter in the cold water inlet.

5.Open the cold water supply.

6.Open a tap and confirm that water flows, and then close.

7.Turn on the power.

8.After confirming that the temperature controller is off, turn on the gas supply.

9.Turn on the temperature controller.

Condensate trap drain plug

Cold water inlet

*Use a wrench or other tool to unscrew the hot water drain plug.

Running a low volume of water through the water heater to prevent freezing

If the temperature exceeds the ability of the water heater to freeze protect itself, or if power is lost, the following steps may prevent the water heater and external piping from freezing. (Units connected with MSA or EZConnect should be drained to prevent freezing if not in use.)

1.Turn the water heater off.

2.Close the gas supply valve.

3.Reduce the flow to about 0.1 gal/min or to where the stream is about 0.2 inches thick.

ON! COLD

HOT

0.1gal/min or about 0.2 inch thick

When the water heater or external piping has frozen

1.Do not operate the water heater if it or the external piping is frozen.

2.Close the gas and water valves and turn off the power.

3.Wait until the water thaws. Check by opening the water supply valve.

4.Check the water heater and the piping for leaks.

22	Manual - Rinnai Condensing Water Heaters

RC80E, RC80I, RC98E, RC98I specifications

The Rinnai RC80E, RC98I, RC98E, and RC80I are high-efficiency tankless water heaters that exemplify leading-edge technology and engineering. Designed to meet the demands of modern households, these units provide continuous hot water while offering energy savings and compact sizes.

Starting with the RC80E, this model features a maximum flow rate of 8 gallons per minute, making it suitable for smaller homes or multi-family settings. It incorporates Rinnai's Circ-Logic technology, allowing homeowners to customize their hot water recirculation. This means users can schedule hot water availability, ensuring comfort while minimizing water waste.

The RC98I and RC98E models elevate performance, boasting a maximum flow rate of 9.8 gallons per minute. The "I" in RC98I stands for internal, indicating its built-in temperature control and Wi-Fi connectivity options. This allows for remote monitoring and control via a smartphone app, enhancing user convenience. In contrast, the "E" in RC98E indicates it has an external setting, providing flexibility for homeowners seeking installation options that cater to their specific needs.

All four models feature Rinnai’s condensing technology, which utilizes a dual heat exchanger design for superior efficiency. This not only lowers energy costs but also reduces CO2 emissions, aligning with eco-friendly standards. Additionally, they operate at an impressive Uniform Energy Factor (UEF), which is crucial for energy-conscious homeowners.

Safety is a significant consideration in Rinnai’s design philosophy. The RC80E, RC98I, RC98E, and RC80I come equipped with multiple safety features, including overheating protection and venting safeguards, ensuring peace of mind during operation. Their compact size allows for versatility in installation, fitting into tight spaces and freeing up valuable room in your home.

Moreover, these water heaters are designed for longevity, featuring a durable construction that resists corrosion. Rinnai's commitment to quality is evident in their extensive warranty, proving their confidence in the product’s reliability.

In summary, the Rinnai RC80E, RC98I, RC98E, and RC80I units represent a blend of advanced technology, efficiency, and convenience. With significant flow rates, innovative features like Circ-Logic and Wi-Fi compatibility, as well as robust safety measures, they are an excellent choice for any homeowner looking to enhance their hot water experience while promoting energy efficiency.

Rinnai RC80I, RC98I, RC98E, RC80E Freeze Protection Piping, Manual draining of the water heater

Models: RC80E RC80I RC98E RC98I