Set back

This function allows a minimum room temperature to be pre-set, between 38ºF and 78ºF (in 2ºF increments). This temperature should be set below the room temperature setting. The default setting is 60ºF. Once the Set back function is selected the appliance will start heating whenever the room temperature falls below the selected temperature, regardless of timer or manual settings.

Follow these steps to set and operate the Set back feature:

1.Make sure the heater is turned OFF.

2.Press the “Set back” button. The light above the button will come on.

3.Press the up and down buttons to set the minimum temperature.

When the “Set back” indicator is on, frost protection is operating, and will always prevent the room temperature from falling below the pre-set minimum temperature (as long as electric power and gas is supplied).

To turn this feature off, press the “Set back” button.

The unit will retain its ON or OFF setting after a power failure. (Default setting at the factory is on.)

Humidifier and Air Flow Direction

Adding Water to the Humidifier

Do not remove the bottom trim panel or the humidifier tray while warm air is flowing. Wait 5 minutes after turning the unit off.

Warm air is humidified when it passes over the water in the tray.

To fill the tray, remove the bottom panel by pushing on both sides and pulling it toward you. Pull the tray out and fill with water. Do not exceed the fill line. Push the tray back in and attach the bottom panel. Do not operate the appliance unless the humidifier tray is installed.

During operation a small amount of condensation is produced in the flue system and drains into the humidifier tray.

Adjusting Air Flow Direction

Do not adjust the air flow louvers while warm air is flowing.

The vertical louvers may be adjusted to move the air flow more to the right or to the left.

Use a screw driver or similar object to bend each louver to the desired position.

Do not bend repeatedly (no more than 5 times) or else the louver will break.

The horizontal louvers (which determines the vertical air flow direction) are fixed and cannot be adjusted.

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Rinnai Corporation EX17C / EX22C Manual

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Rinnai EX22C (RHFE-559FTA) installation manual Set back, Humidifier and Air Flow Direction, Adding Water to the Humidifier

EX17C (RHFE-434FTA), EX22C (RHFE-559FTA) specifications

The Rinnai EX17C (RHFE-434FTA) and EX22C (RHFE-559FTA) are innovative wall-mounted gas heaters that provide efficient and cozy heating solutions for indoor spaces. Manufactured with advanced technology, these models are designed to meet diverse heating needs while ensuring user comfort and safety.

One of the standout features of both the EX17C and EX22C is their energy efficiency. With a high energy star rating, these heaters minimize energy consumption, making them ideal for environmentally conscious consumers. The EX17C can deliver an impressive 17 kW of heating power, while the EX22C offers up to 22 kW, accommodating various room sizes and layouts effectively.

Both models utilize Rinnai’s advanced direct vent technology. This system allows fresh air from outside to be used for combustion, ensuring optimal heating performance without depleting indoor oxygen levels. This feature not only enhances comfort but also contributes to improved indoor air quality. Additionally, the closed combustion system ensures that exhaust gases are safely vented outside, providing a safer environment for occupants.

In terms of design, the EX17C and EX22C are sleek and modern, fitting seamlessly into various interior styles. Their wall-mounted configuration saves floor space, making them suitable for smaller rooms or homes where space optimization is a priority. The adjustable heat settings enable users to customize their heating preferences according to the season or personal comfort levels.

User convenience is a core aspect of both models, which come equipped with an intuitive electronic control panel. This feature allows for easy temperature adjustments and scheduling, ensuring that optimal heat levels can be maintained without constant manual intervention. Some models also offer remote control capabilities, enhancing usability for consumers.

Safety is paramount in Rinnai's design philosophy, and the EX17C and EX22C include multiple safety features such as flame failure detection and automatic shut-off. These mechanisms ensure that any irregularities in operation are promptly addressed, providing peace of mind for homeowners.

In conclusion, the Rinnai EX17C and EX22C offer modern, energy-efficient heating solutions with advanced technology, user-friendly features, and a focus on safety. These models are ideal choices for anyone looking to enhance their indoor heating experience while maintaining energy efficiency and comfort.