Adjust Gas Pressure Settings

6.Press the test switch twice to record the gas type code into memory. .

7.Press the ON/OFF button to operate the appliance.

8.Press the test switch twice. The LED will display “PL” indicating low fire mode.

9.Compare the pressure reading on the manometer to the desired manifold test pressure (low) for your gas type and altitude. If necessary adjust the low fire pressure using the ▲ and ▼ buttons.

10.Press the test switch. The LED will display “PH” indicating high fire mode.

11.Compare the pressure reading on the manometer to the desired manifold test pressure (high) for your gas type and altitude. If necessary adjust the high fire pressure using the ▲ and ▼ buttons.

12.Press the ON/OFF button again. The LED display turns blank and the appliance returns to the normal OFF mode.

13.Remove manometer and install Allen head screws. Operate the unit and

check the normal operating sequence

visually inspect the flame

check for gas leaks at the test points

Normal Operating Sequence

When you press the ON/OFF button, the LED display will illuminate, the combustion fan will begin to run, and the spark will ignite the main burner.

This heater has an automatic ignition system. When the main burner has lit, the combustion lamp will glow red, and the spark will stop.

Visual Inspection of Flame

Check that the burner flames are operating normally. The flame can be seen through the circular window.

When operating normally the burner flame should appear as long, clear, blue, stable, streaks. Yellow flames or an orange color is abnormal and maintenance is required.

NORMAL

Flame Rod

Long, clear, blue, stable flames

ABNORMAL

Flame Rod

Yellow flames or orange color

Final Assembly

1.Install the front panel and bottom cover.

2.If doing a gas type conversion, place the new conversion plate (label) on the front cover.

Rinnai Corporation EX17C / EX22C Manual

29

Page 29
Image 29
Rinnai EX17C (RHFE-434FTA), EX22C (RHFE-559FTA) installation manual Normal Operating Sequence, Final Assembly

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.