9Starting up: Filling and de-aerating the boiler and installation

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CAUTION

NOTICE

NOTICE

WARNING

CAUTION

Observe the following rules of safety:

-All work on the unit must take place in a dry environment.

-Rinnai units may never be in operation without their housing, except in connection with maintenance or adjustments (see Chapter 12 and 13).

-Never allow electrical or electronic components to come into contact with water.

NOTICE

Carry out the following tasks in connection with maintenance, etc. to an already- installed unit:

-Shut down all programs

-Close the gas shut off valve

-Shut off the power at the main power switch

-Close the service valves (system supply and return)

NOTICE

Take note of the following when maintenance or adjustments are needed:

-The unit must be able to function during these activities; for this reason, the unit’s supply voltage, gas pressure and water pressure must be maintained. Ensure that this is not a source of potential danger during these activities.

Following maintenance or other activities; always check the installation of all parts through which gas flows (with bubble test using leak-search spray).

9.1 Requirements of the water system

Installation & Servicing Instructions Rinnai E-Series

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WARNING

WARNING

NOTICE

Before filling the heating system, the complete system, including all zones, must be thoroughly cleaned and flushed to remove sediment. Flush until clean water runs free of sediment. Rinnai suggests using an approved system cleaner to flush the system, but not the boiler. See the Rinnai Boiler Applications Manual for furtherinformation and for a list of approved cleaners.

Approved antifreezes are Noble NoburstAluminum, Rhomar RhoGardAluminum Safe Multi-Metal. Never use salt bedding exchangers, reverse osmosis, D.I., or distilled water for filling the heating system.

Do not use petroleum-based cleaning or sealing compounds in the boiler system. Damage of seals and gaskets in boiler and system could occur, resulting in substantial property damage.

The central heating installation needs to be filled with potable water.

Use only potable water or approved glycol for filling the heating system. When the water hardness of the filling water exceeds > 10.5 gpg (200 mg/L) and the volume of the installation > 20L/kW (5.2 gallons/3,412 BTU) the water has to be treated until below the maximum value of 10.5 gpg (200 mg/L). The pH value of the installation water must be between 6.5 and 8.5.

Check the The pH value using a digital pH meter that has been properly calibrated or by having the water analyzed by a water treatment company.

If pH differs from above, contact Rinnai engineering for further assistance.

Failure to adhere to the water quality requirements will result in a void of war- ranty.

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Rinnai E110CN, E110CP, E75CN, E75CP user manual Requirements of the water system

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.