Before Making a Service Call

Before making a service call please check the following:

At Ignition:

Heater does not operate.

Is the heater plugged in?

Have the fuses or breaker blown at the fuse box / breaker panel? Is there a power failure?

Is the air filter blocked?

Is anything blocking the outlet for the hot air? Is the flue blocked?

Warm air does not flow when the burner lights.

Smoke or strange smells are produced on the first trial light up after installation.

Sharp clicking noises at ignition

During Combustion:

Clicking noise when the thermostat operates.

Unit is not heating room.

Air filter is blocked or the louvers are blocked or obstructed.

Heater will not re-ignite after overheating.

The fan is started automatically after a short delay.

This is to allow the heat exchanger to warm up, helping to avoid cold draughts.

This is caused by grease or oil and dust on the heat exchanger and will stop after a short time.

This is simply expansion noise from the heat exchanger.

This is the sound of the solenoid gas valves opening and closing.

Is the air filter blocked?

Is the set temperature high enough?

Is the warm air outlet blocked by anything?

Are the doors and windows of the room closed?

Was the appliance correctly sized for the space?

Allow heater to cool, clean air filter, operate again.

Even after unit has cooled down, the heater does not ignite again. Repair is necessary.

Contact a qualified / authorized service provider.

When the unit is turned off.

Convection fan continues to run after turning OFF.

This is to remove the residual heat from the heat exchanger. The fan will stop when the heater cools down.

Other Points:

Steam is discharged from the flue terminal .

High efficiency appliances tend to discharge water vapor on cold days. This is normal.

Unit shuts off without apparent reason.

Check whether filters are blocked. Dirty filters will cause the heater to overheat.

12	Rinnai Corporation EX17C / EX22C Manual

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.