6.1.2Safety valve

i NOTICE

An ASME 30 psi pressure relief valve is installed on the plumbing kit included

with the boiler.

6.1.3Low water cut off

The Rinnai E boiler has a factory installed pressure switch type Low Water Cut

i NOTICE Off (LWCO). Check your local codes to see if a Low Water Cut Off is required (LWCO) and if this device conforms to local code. See the Rinnai Boiler Applications Manual for further information.

The Low water cut off is not serviceable.

6.2Expansion tank

i NOTICE

Installation & Servicing Instructions Rinnai E-Series

The E-Series boilers are equiped with an internal expansion tank.

The tank of the E75CN and E75CP is positioned inside the boiler casing. This expansion tank has a pre-charge pressure of 14.5 PSI / 1 Bar and a capacity of 2.1 gallon / 8 litres.

The tank of the E110CN and E110CP is positioned directly beneath the boiler and together with the casing forms a single entity with the boiler.

The casing can be removed by pulling forwards. The expansion tank has a pre-charge pressure of 14.5 PSI / 1 Bar and a capacity of 3.1 gallon / 12 litres.

If a larger capacity expansion tank is needed for the installation a standard expansion vessel should be fitted additionally.

In that case choose an expansion tank volume, of which the summary is geared to the installation’s water capacity. The pre-charge pressure depends on the installation height above the expansion tank. Fit the expansion tank into the return pipe as close as possible to the boiler. The extra expansion tank should be sourced locally. Please refer to the expansion tank manufacturer for further information.

Fill the expansion tank to a minimum of 14.5 psi.

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Rinnai E110CP, E75CN, E110CN, E75CP user manual Safety valve, Low water cut off, Expansion tank, With the boiler

E75CP, E110CN, E75CN, E110CP specifications

Rinnai is a leading name in the heating industry, recognized for producing highly efficient and reliable tankless water heaters. Among their popular models are the Rinnai E75CN, E75CP, E110CP, and E110CN, each designed to cater to various household needs and preferences.

The Rinnai E75CN and E75CP are both remarkable for their compact size and impressive heating capabilities. The E75CN is a natural gas model, while the E75CP runs on propane. These units are designed to deliver a maximum flow rate of up to 7.5 gallons per minute, ensuring that multiple fixtures can be used simultaneously without a dip in performance.

Both models incorporate advanced temperature control technology, allowing users to set their desired water temperature with precision. The units feature a durable heat exchanger, constructed from high-grade stainless steel, which not only promotes longevity but also helps in preventing corrosion. Additionally, they come with built-in safety features, such as freeze protection and an overheat cut-off system, ensuring safe operation in varying conditions.

Moving on to the Rinnai E110CP and E110CN, these tankless water heaters are designed for larger households with higher hot water demands. The E110CP operates on propane, while the E110CN utilizes natural gas. These units deliver a maximum flow rate of up to 11 gallons per minute, making them ideal for simultaneous use in multiple bathrooms, kitchens, and laundry rooms.

The E110 models showcase Rinnai's Smart Technology, which optimizes energy consumption by adjusting the heating output based on the demand. This not only maximizes efficiency but also significantly reduces energy costs. They are equipped with digital controls and diagnostics, providing users with real-time information and the ability to troubleshoot easily if any issues arise.

In terms of installation, all four models are designed for versatility. They can be installed indoors or outdoors, giving homeowners flexibility based on their space and preference. With their compact design, these units require less space compared to traditional tank heaters, making them a suitable choice for modern homes.

Overall, Rinnai's E75CN, E75CP, E110PC, and E110CN models represent cutting-edge technology in tankless water heating. Their efficiency, safety features, and advanced technology make them an excellent choice for homeowners looking to upgrade their hot water systems. With Rinnai, users can enjoy the convenience of continuous hot water without sacrificing energy efficiency.