Rinnai I-Series Condensing Boiler i060C User Manual

Content

Rinnai I-Series Condensing Boiler i060C Manual and User Guide

The rinnai I-Series Condensing Boiler i060C is a wall-mounted, gas-fired combi boiler designed to provide central heating and domestic hot water from one compact appliance. Its condensing design captures additional heat from combustion exhaust, helping improve fuel efficiency compared with many conventional boiler systems.

With a maximum central-heating input of 60,000 BTU per hour and domestic hot-water input up to 160,000 BTU per hour, the i060C is suited to appropriately sized homes that need space heating and on-demand hot water. The unit uses a stainless-steel primary heat exchanger and a secondary flat-plate heat exchanger for domestic hot-water production.

This boiler is designed for homeowners, heating contractors, remodelers, and property managers seeking a space-saving alternative to separate boilers and water heaters. Its wall-mounted format can be useful in utility rooms, closets, and other locations where floor space is limited.

The boiler supports natural gas and can be field-converted for propane by a qualified professional. It is also capable of domestic-hot-water recirculation when the required external pump and plumbing configuration are installed. Because this is a gas appliance, installation, combustion setup, venting, electrical work, and commissioning should be completed by a trained and qualified professional.

Rinnai i060C Specifications and Key Features

Appliance type: Indoor, wall-mounted, gas-fired condensing combi boiler.
Primary heating capacity: Approximately 60,000 BTU per hour central-heating input.
Domestic hot-water input: Up to 160,000 BTU per hour.
Minimum input: 15,000 BTU per hour.
Maximum domestic hot-water flow: Approximately 7.9 gallons per minute under specified test conditions.
Dimensions: Approximately 18.5 inches wide, 26.4 inches high, and 10.9 inches deep.
Weight: Approximately 73 pounds.
Gas compatibility: Natural gas; propane operation requires the approved field-conversion procedure.
Heat exchangers: Stainless-steel primary heat exchanger with a secondary flat-plate domestic-hot-water exchanger.
Ignition: Direct electronic ignition.
Heating pressure relief: 30 PSI relief valve included for the central-heating circuit.
Recirculation: Compatible with domestic-hot-water recirculation using an external pump and suitable system design.
Installation format: Compact wall-mounted design intended to save floor space.

How to Install and Set Up the Rinnai i060C

Installation must follow the current Rinnai Installation and Operation Manual, local codes, and the requirements of the authority having jurisdiction. Do not attempt gas, venting, combustion, or safety-control work without the required qualifications.

Confirm that the boiler model, gas type, electrical supply, venting materials, and heating load are suitable for the installation.
Select an indoor mounting location that provides the required clearances, service access, drainage, and protection from freezing conditions.
Secure the mounting bracket to a structurally suitable surface and hang the boiler according to the installation manual.
Connect the gas supply, central-heating flow and return, domestic cold-water inlet, hot-water outlet, condensate drain, pressure relief discharge, and approved vent system.
Install system controls, thermostats, isolation valves, strainers, and any required expansion or circulation equipment.
Flush the heating circuit, fill it to the installer’s specified pressure, and remove trapped air.
Check every gas and water connection for leaks before operating the appliance. Never operate the boiler if a gas leak is suspected.
Connect electrical power, configure the control settings, and commission combustion using calibrated test equipment.
If domestic-hot-water recirculation is required, install the external pump and configure the appropriate recirculation mode.

If the boiler does not start, verify that power, gas supply, water pressure, thermostat demand, system valves, and condensate drainage have been checked by the installer.

Rinnai i060C Troubleshooting and Error-Code Guidance

Always read the display message or error code exactly as shown and consult the model-specific manual before resetting the appliance. A reset may temporarily clear a condition without correcting its cause.

No heating: Check the thermostat setting, heating schedule, electrical supply, system pressure, and open isolation valves. A qualified technician should investigate repeated lockouts.
No domestic hot water: Confirm that the cold-water supply is open and that the flow rate is adequate. A blocked inlet filter, restricted pipe, or inadequate water pressure can reduce performance.
Low system pressure: Look for visible leaks and confirm the pressure reading. Repressurization and inspection should be performed according to the installation manual.
Ignition or flame failure: Do not repeatedly reset the boiler. A qualified professional must check gas pressure, venting, combustion, ignition components, and condensate drainage.
Overheating: Turn off the appliance if unusual noises, a burning smell, or repeated high-temperature faults occur. Service may be required for circulation, scaling, or sensor problems.
Condensate or venting warning: Inspect only for obvious blockage or freezing from a safe location. Do not modify the vent system; contact a qualified service provider.

Preventive maintenance includes annual professional inspection, cleaning of filters, checking condensate drainage, verifying combustion, inspecting vent terminals, and confirming system pressure. For warranty assistance in the United States and Canada, contact Rinnai at 1-800-621-9419. Warranty coverage depends on proper installation, registration requirements, application, and the terms in the current Installation and Operation Manual.

Rinnai I-Series Condensing Boiler i060C Pros and Cons

Advantages

Space-saving design: Wall mounting can free floor space compared with traditional floor-standing boiler and water-heater arrangements.
Two functions in one appliance: The combi configuration provides central heating and domestic hot water without requiring a separate storage tank.
Condensing operation: The boiler can recover heat from combustion exhaust when installed and operated under suitable return-water conditions.
Modulating output: The broad input range helps the appliance adjust output to changing heating demand.
Recirculation capability: An appropriately designed system can reduce hot-water wait times at fixtures.
Flexible fuel configuration: Natural-gas installations can be converted to propane through the approved professional conversion process.

Limitations

Professional installation required: Gas, venting, condensate, combustion, and electrical connections are not suitable for do-it-yourself installation.
Domestic hot-water capacity varies: Actual flow depends on incoming-water temperature, flow demand, gas supply, and the required temperature rise.
Whole-house suitability must be calculated: A 60,000 BTU central-heating input may not suit every building, especially poorly insulated or high-load homes.
Maintenance is important: Scaling, dirty filters, blocked condensate drains, poor water quality, or incorrect combustion settings can reduce reliability.
System design matters: Homes needing large simultaneous hot-water demand or extensive hydronic zones may require a different boiler arrangement or additional equipment.

The rinnai I-Series Condensing Boiler i060C is best suited to properly sized residential hydronic-heating systems where compact installation and integrated hot-water production are priorities. A heating professional should perform a heat-loss calculation and domestic-hot-water assessment before selection.

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Faqs

How do I set up the rinnai I-Series Condensing Boiler i060C for the first time?

The rinnai I-Series Condensing Boiler i060C must be installed and commissioned by a qualified professional. Setup includes mounting the wall-hung boiler, connecting the correct gas and water supplies, installing approved intake and exhaust venting, routing the condensate drain, filling and purging the heating system, and verifying electrical grounding. The installer should also configure the control settings, check for leaks, confirm system pressure, and test ignition and heating operation before handing over the boiler.

What system pressure should the rinnai I-Series Condensing Boiler i060C have?

Check the boiler display or an external pressure gauge regularly. The rinnai I-Series Condensing Boiler i060C generally operates with system pressure around 17 to 26 psi when the system is properly filled and operating. Low pressure can limit heating performance and trigger a diagnostic condition, while excessive pressure may indicate expansion-tank, filling-valve, or overheating problems. Do not repeatedly add water without finding the cause; contact a qualified heating technician if pressure changes significantly.

Why is my rinnai I-Series Condensing Boiler i060C showing an ignition error?

An ignition error can result from a closed gas valve, an empty propane supply, air in new gas piping, blocked combustion air or exhaust venting, poor grounding, or an incorrect gas conversion. Check only that the boiler gas valve and household gas supply are turned on and that vents are visibly unobstructed. Do not open the cabinet or adjust gas components. If the error returns after a permitted reset, shut down the appliance and have a licensed professional diagnose it.

How do I troubleshoot an LC code on the rinnai I-Series Condensing Boiler i060C?

An LC code commonly indicates lime-scale buildup in the domestic hot-water heat exchanger. Continued operation may reduce hot-water flow or temperature stability. A qualified technician should flush the domestic hot-water heat exchanger using the manufacturer’s procedure and suitable cleaning solution. The code may clear after scale is removed. If it remains, the technician should inspect the hot-water thermistor, flow sensor, pump, and related wiring rather than repeatedly resetting the boiler.

Can the rinnai I-Series Condensing Boiler i060C work with an external thermostat or controller?

The rinnai I-Series Condensing Boiler i060C can be integrated with compatible heating controls, but the thermostat or controller must match the boiler’s wiring and control requirements. Have the installer verify terminal connections, voltage, communication compatibility, and zoning equipment before installation. Power should be disconnected before wiring controls, and low-voltage terminals should not be confused with nearby line-voltage components. Incorrect wiring can damage the control board or prevent heating demand from reaching the boiler.

How can I improve heating performance from the rinnai I-Series Condensing Boiler i060C?

Optimize the rinnai I-Series Condensing Boiler i060C by keeping the intake and exhaust clear, maintaining correct system pressure, balancing radiators or heating zones, and using outdoor-reset or weather-compensation controls when supported by the installation. Lower water temperatures can help a condensing boiler operate efficiently, but settings must still meet the building’s heat demand. Bleed radiators when necessary, check for air or circulation problems, and have a technician verify pump operation and system flow.

What maintenance does the rinnai I-Series Condensing Boiler i060C need?

At least annually, a qualified technician should inspect the rinnai I-Series Condensing Boiler i060C, venting, combustion, gas connections, wiring, relief valve, heat exchanger, condensate trap, and system pressure. The condensate drain must remain open and correctly routed, while the air intake and exhaust termination should be checked for blockage, damage, or icing. The owner can watch for leaks, unusual noises, error codes, and pressure changes, but internal service and combustion testing require professional equipment.

What should I do if the rinnai I-Series Condensing Boiler i060C loses power during freezing weather?

If the rinnai I-Series Condensing Boiler i060C loses power, its freeze-protection functions may not operate. Keep the building warm if possible and restore power only after confirming that the electrical supply and boiler area are safe. If an extended outage is expected, contact a qualified professional for guidance on protecting or draining the heating system. Never remove covers or bypass safety controls. After power returns, inspect for leaks, confirm pressure, and arrange service if the boiler displays an error.