Navien NHB-150 Condensing Boiler Manual

About the Boiler

Description of the Boiler

The Navien NHB boiler is available in 4 models: NHB-055, NHB-080, NHB-110 and NHB-150.

The main features are as follows:

• Power Interruption: When the power is restored after a power failure, the boiler will automatically start and return to normal operation. A manual reset is not required.
• Freeze Protection: A sensor inside the boiler automatically detects the temperature and, if necessary, initiates a safety heating cycle to prevent internal equipment damage due to freezing temperatures.
• Short-Circuit Protection: Any short-circuit occurring in the boiler's electrical circuit immediately blows the internal glass fuses and automatically cuts off the gas supply.
• Lightning Protection: Each boiler is specially grounded, both internally and externally, to protect against lightning strikes.
• Carbon Monoxide Protection: The boiler is designed to maintain a safe air-to-gas ratio and combustion rate. This function is continuously monitored by the boiler's air ratio control module.
• Auto Fan Detection: The rotation of the fan is automatically detected and controlled. Fan failure will stop the operation of the boiler.
• Boiling Prevention: Excessive temperatures will automatically stop the boiler.

Parts of the Boiler

Front View

Bottom View

#	Description
a	Rubber Grommets
b	Condensate Outlet
c	Gas Connection
d	Space Heating Supply Connection
e	Space Heating Return Connection

The Front Panel

The front panel allows you to adjust the temperature and view the operating status or error codes. Remove the protective sheet from the front panel before using it.

Icons and Digital Display

The icons and digital display on the front panel provide important information required for the boiler's operation. Refer to the following table for detailed information.

1. 
   
   Space heating mode
   Indicates space heating mode operation.
2. 
   
   Error
   A code will appear on the display.
3. 
   
   Combusting
   Indicates burner operation.
4. 
   
   DHW mode
   Indicates DHW mode operation.
5. 
   
   Digital Display
6. 
   
   Supply water control
   Indicates supply water control status.
7. 
   
   Return water control
   Indicates return water control status.
8. 
   
   Outdoor Reset
   Indicates outdoor reset operation.
9. 
   
   Pri
   Indicates DHW priority operation.
10. 
    
    Psi
    Indicates water pressure.

Buttons

Using the buttons on the front panel, you can turn on or off the boiler, monitor the current operation status, and set the values required for the boiler's operation, such as space heating and DHW supply temperatures. Refer to the following table for detailed information.

11. 
    
    Diagnostics button
    For installers only
12. 
    
    Mode button
    Changes the mode.
13. 
    
    Reset button
    Resets the boiler (if an error occurs).
14. 
    
    Up button
    Increases the temperature
15. 
    
    Down button
    Decreases the temperature
16. 
    
    Power button
    Turns the water heater on or off.

Operating the Boiler

Turning the Boiler On or Off

To turn the boiler on or off, press the Power button for 0.3 seconds.

When the power is on, the boiler supply water temperature will appear with the water pressure on the front panel display in 5 second intervals.

NOTE: When displaying the boiler supply water temperature, the supply or return water icon turns on, depending on the space heating control mode.

Adjusting the Temperature

Adjusting the Space Heating Temperature

To adjust the heating temperature:

1. Press the Mode button once. The space heating mode icon turns on.
   
2. Press the + (Up) or – (Down) buttons until the desired temperature appears on the display.
   

You can adjust the temperature while the display is flashing. Once the display stops flashing, the temperature setting is stored.

NOTE:

• The Outdoor Reset Control will take precedence over this temperature setting.
• In case of outdoor reset sensor malfunction, the boiler will operate at this set temperature.
• Take note of the original heating temperature in case you want to restore it to the default.
• The default space heating supply water temperature range is 104°F (40°C, Absolute MIN) to 180°F (82°C, Absolute MAX).
• The default space heating return water temperature range is 86°F (30°C, Absolute MIN) to 149°F (65°C, Absolute MAX).
• You can adjust the temperature range in the parameter settings menu.
• The boiler will retain your settings during a power outage.

Adjusting the DHW Indirect Supply Temperature

To adjust the water temperature:

1. Press the Mode button twice. The DHW mode icon turns on.
2. Press + (Up) or – (Down) buttons until the desired temperature appears on the display.
   

You can adjust the temperature while the display is flashing. Once the display stops flashing, the temperature setting is stored.

NOTE:

• Take note of the original DHW temperature in case you want to restore it to the default.
• The default DHW temperature range is 104°F (40°C, Absolute MIN) to 180°F (82°C, Absolute MAX).
• You can adjust the temperature range in the parameter settings menu.
• The boiler will retain your settings during a power outage.

Viewing Basic Information

To view information about the boiler, press the Mode button three times. "INFO" will appear on the display.

Press the + or – buttons to switch between the information types.

Display	Description
	Space heating supply water temperature (°F)
	Space heating return water temperature (°F)
	Outdoor air temperature (°F) (from Outdoor Temperature Sensor)
	Outdoor reset curve -: Not in use. Finned tube baseboard FAN coil Cast iron baseboard Low mass radiant High mass radiant Radiator Custom (set by installer)

Display	Description
	Boost interval time (set by installer)
	Space heating water pressure in PSI
	DHW priority time
	System supply water temperature (°F) (with optional temperature sensor)
	System return water temperature (°F) (with optional temperature sensor)

To exit the Information mode, press the Reset button.

Resetting the Boiler

If an error message appears, you can try resetting the boiler to resolve the problem. To reset the boiler, press the Reset button.

If resetting the boiler does not solve the problem, refer to the Troubleshooting section of this manual or contact Technical Support at 1-800-519-8794.

Maintaining the Boiler

Cleaning the Boiler

Make sure the boiler is turned off and the power supply is disconnected before cleaning the boiler. The boiler may remain hot for several minutes after it is turned off. To prevent burns, wait until the boiler has cooled down before cleaning.

To clean the boiler, wipe the outside with a damp cloth. Use a nonacidic, non-abrasive cleaner to remove any surface stains. The front panel is moisture resistant, but it is not waterproof. Keep it as dry as possible.

Draining the Boiler

You will need to drain the boiler before performing maintenance tasks, such as to prevent the boiler from freezing when it will not be used for an extended period.

Refer to "Parts of the Boiler" for details about part locations.

To drain the boiler:

1. Place a bucket under the boiler to collect the residual water inside the boiler.
2. Press the Power button on the front panel to turn off the boiler.
   
3. Close the gas valve.
   
4. Close the water supply valve and the return valves on the manifold system.
   
5. Remove the drain cap on the manifold system to drain the boiler.
   

NOTE:

• Place a bucket under the boiler to gather water released from the manifold system.
• Do not allow the pump to become wet.

Cleaning the Air Intake Filter

If the air intake filter becomes clogged by dust or lint, the boiler will cease to operate and "Error Code 110" will appear on the front panel display. To properly maintain the boiler, clean the air intake filter every 3-4 months.

To clean the air intake filter:

1. Press the Power button on the front panel to turn off the boiler.
   
2. Disconnect the power supply to the boiler.
3. Remove the front cover of the boiler.
   
4. Remove the screw that secures the air intake filter (the filter is located at the top left of the boiler).
   
5. Pull the filter out of the boiler.
   
6. Remove the filter from the plastic assembly. Dust and rinse it with clean running water.
   
7. Allow the filter to dry completely.
8. Place the filter assembly back into the boiler and secure it with the screw.
9. Replace the front cover.
10. Reconnect the power supply to the boiler.
11. Press the Power button on the front panel to turn on the boiler.

Protecting the Boiler from Freezing

Damage due to freezing is not covered by the Navien limited warranty.

• Freezing damage is most likely to occur due to back drafting caused by negative pressure in the building. This is not a manufacturing defect, and therefore, Navien will not warrant any damages due to freezing. The installer is responsible for ensuring that there is sufficient make-up air to avoid such a situation and the owner is responsible for ensuring that protection against freezing is maintained.
• To avoid freezing issues, we strongly recommend the use of a direct vent exhaust and intake system. Your installer should ensure that the exhaust vent pipe and the air intake pipe are both connected directly from the collars on the top of the boiler to the outdoors.
• This type of vent system minimizes air movement within the boiler. This boiler has an optional recirculation mode that is used for freeze protection.
• This mode should prevent the boiler from freezing, even if the intake air duct is not vented directly. The boiler is designed for indoor installation only.

To ensure that the boiler does not freeze, follow these guidelines:

• Do not unplug the power supply cord, except for routine maintenance. The boiler has a freeze protection function that requires electricity. The freeze protection function will operate regardless of whether or not the power is turned on or off, as long as the electric supply is still connected.
• Do not close the gas valve, except for routine maintenance, as this will limit additional freeze protection.
• If the boiler will not be used for an extended period, drain the boiler.
  If the power or gas supplies must be disconnected for an extended period, drain the boiler. Freezing damage may occur if there is water remained in the boiler in cold weather.
  If hot water will not flow and you suspect that the boiler is frozen, contact an authorized technician or licensed professional.
  This boiler requires very little maintenance, however a qualified technician should inspect the boiler at the beginning of every heating season and/or when there is a problem.

NOTE:

• If hot water will not flow and you suspect that the boiler is frozen, contact an authorized technician or licensed professional.
• This boiler requires very little maintenance, however a qualified technician should inspect the boiler at the beginning of every heating season and/or when there is a problem.

Maintenance Schedules

Owner maintenance
Daily	Check the boiler area is free of combustible/flammable materials and air contaminants. Check the pressure/temperature gauge for signs of higher than normal pressure.
Monthly	Visually inspect the vent piping for signs of leakage and blockage. Visually inspect the burner flames. Inspect the condensate trap and the PVC fittings.
Periodically	Test the LWCO for proper operation.
Every 6 months	Inspect boiler piping (gas and water) for leaks. Test to make sure the relief valve is operating normally.
Non-heating season	Shut boiler down (unless boiler is used for domestic hot water).

Service technician (See the following instructions)

Annual Start-up

General: Address reported problems. Inspect interior; clean and vacuum if necessary. Clean condensate trap and fill with fresh water. Check for leaks (water, gas, flue, condensate). Verify flue and air lines in good condition and sealed tight. Check system water pressure/system piping/expansion tank. Check control settings. Check ignition and flame rod (clean and reposition). Check wiring and connections. Inspect flame (stable, uniform). Inspect flame signal. If combustion or performance indicate need: Flush heat exchanger. Remove and clean air intake filter.

• Follow the service and maintenance procedures given throughout this manual and in component literature shipped with the boiler. Failure to perform the service and maintenance could result in damage to the boiler or system.
• Failure to follow the directions in this manual and component literature could result in severe personal injury, death, or substantial property damage.
• The boiler should be inspected annually only by a qualified service technician. In addition, the maintenance and care of the boiler must be performed to assure maximum boiler efficiency and reliability. Failure to service and maintain the boiler and system could result in equipment failure.
• Electrical shock hazard – Turn off power to the boiler before any service operation on the boiler except as noted otherwise in this instruction manual. Failure to turn off electrical power could result in electrical shock, causing severe personal injury or death.

Addressing the Reported Problems

Inspect any problems reported by the owner and correct before proceeding.

Inspecting the Installation Area

1. Verify that boiler area is free of any combustible materials, gasoline and other flammable vapors and liquids.
2. Verify that air intake area is free of any of the contaminants listed in Installation & Operation Manual. If any of these are present in the boiler intake air vicinity, they must be removed. If they cannot be removed, reinstall the air and vent lines per the Installation and Operation Manual.

Inspecting the Boiler Interior

1. Remove the front cover and inspect the interior of the boiler.
2. Vacuum any sediment from inside the boiler and components. Remove any obstructions.

Cleaning the Condensate Trap

1. Inspect the condensate drain line, condensate fittings, and condensate trap.
2. Remove any sediment in the trap.
3. Fill with fresh water until the water begins to pour out of the drain.

Checking all Piping for Leaks

Eliminate all system or boiler leaks. Continual fresh makeup water will reduce boiler life. Minerals can build up in sections, reducing heat transfer, overheating heat exchanger, and causing heat exchanger failure. Leaking water may also cause severe property damage.

1. Inspect all water and gas piping and verify to be leak free.
2. Look for signs of leaking lines and correct any problems found. Checking the Flue Vent System and Air Piping

Checking the Flue Vent System and Air Piping

1. Visually inspect the entire flue gas venting system and air piping for blockage, deterioration or leakage. Repair any joints that show signs of leakage. Verify that air inlet pipe is connected and properly sealed (if installed).
2. Verify that boiler vent discharge and air intake are clean and free of obstructions.

Failure to inspect for the above conditions and have them repaired can result in severe personal injury or death.

Checking the Water System

1. Verify all system components are correctly installed and operational.
2. Check the cold fill pressure for the system. Verify it is correct (must be a minimum of 12 psi).
3. Watch the system pressure as the boiler heats up (during testing) to ensure pressure does not rise too high.

NOTE:

• If the system contains glycol, test for proper concentration as recommended by manufacturer.
• Excessive pressure rise indicates expansion tank sizing or performance problem.

4. Inspect automatic air vents and air separators. Remove air vent caps and briefly press push valve to flush vent.
5. Replace caps. Make sure vents do not leak. Replace any leaking vents.

Checking Expansion Tank

• Expansion tanks provide space for water to move in and out as the heating system water expands due to temperature increase or contracts as the water cools.
• Perform annual checks as recommended by manufacturer to ensure proper operation.

Checking the Pressure Relief Valves

1. Inspect the relief valve and lift the lever to verify flow. Before operating any relief valve, ensure that it is piped with its discharge in a safe area to avoid severe scald potential.
   NOTE:
   Safety relief valves should be inspected at least once every three years, by a licensed plumbing contractor or authorized inspection agency, to ensure that the product has not been affected by corrosive water conditions and to ensure that the valve and discharge line have not been altered or tampered with illegally.

• Certain naturally occurring conditions may corrode the valve or its components over time, rendering the valve inoperative. Such conditions are not detectable unless the valve and its components are physically removed and inspected. This inspection must only be conducted by a plumbing contractor or authorized inspection agency – not by the owner. Failure to re-inspect the boiler relief valve as directed could result in unsafe pressure buildup, which can result in severe personal injury, death, or substantial property damage.
• Following installation, the valve lever must be operated at least once a year to ensure that waterways are clear. Certain naturally occurring mineral deposits may adhere to the valve, rendering it inoperative. When manually operating the lever, water will discharge and precautions must be taken to avoid contact with hot water and to avoid water damage.
• Before operating lever, check to see that a discharge line is connected to this valve directing the flow of hot water from the valve to a proper place of disposal. Otherwise severe personal injury may result. If no water flows, valve is inoperative. Shut down the boiler until a new relief valve has been installed.

2. After following the above warning directions, if the relief valve weeps or will not seat properly, replace the relief valve. Ensure that the reason for relief valve weeping is the valve and not over-pressurization of the system due to expansion tank waterlogging or undersizing.

Inspecting the Ignition and Flame Detector Electrodes

1. Remove the ignition and flame detector electrodes from the boiler heat exchanger.
2. Remove any deposits accumulated on the ignition/flame detector electrode. If the electrodes cannot be cleaned satisfactorily, replace with new ones.
3. Replace ignition/flame detector electrode, making sure gasket is in good condition and correctly positioned.

Checking the Ignition Ground Wiring

1. Check that the ground wire is in good condition and securely attached to the boiler casing.
2. Check ground continuity of wiring using continuity meter.
3. Replace ground wires if ground continuity is not satisfactory.

Checking all Boiler Wiring

Inspect all boiler wiring, making sure wires are in good condition and securely attached.

Checking the Control Settings

1. From the front panel, enter the Diagnostics Mode and check all settings. Adjust settings if necessary.
2. Check settings of external limit controls (if any) and adjust if necessary.

Performing Start-up and Checks

1. Start boiler and make sure that the boiler is operating properly.
2. Verify cold fill pressure is correct and that operating pressure does not go too high.

Check the Burner Flame

1. Inspect flame through observation window.
2. If the flame is unsatisfactory at either high fire or low fire, check for obstructions in the venting and ensure that the air intake filter is clean.

Review with the Owner

1. Review the User's Information Manual with the owner.
2. Emphasize the need to perform the maintenance schedule.
3. Remind the owner of the need to call a licensed contractor should the boiler or system exhibit any unusual behavior.
4. Remind the owner to follow the proper shutdown procedure and to schedule an annual start-up at the beginning of the next heating season.

Flushing the Heat Exchanger

Flushing the heat exchanger is a somewhat complicated procedure. Read the following instructions carefully before attempting this procedure. If you are uncertain about any of the steps in the procedure, contact an authorized technician or licensed professional. Keep in mind that improper maintenance can void your warranty.

Refer to the "Parts of the Boiler" for details about part locations.

Before flushing the Heat Exchanger, gather the following items:

• A bucket that is 5 gallons or larger
• Cleaning solution diluted with water
• 3 hoses
• A water circulation pump
• 2 flush valves (if not installed)
  NOTE: Before flushing the heat exchanger, additional flush valves ("A" and "B") must be installed on the near boiler piping (included with Navien Manifold System).

To flush the Heat Exchanger:

1. Press the Power button on the front panel to turn off the boiler.
2. Disconnect the power supply to the boiler.
3. Close the "C" and "D" valves on the supply and return water lines.
4. Connect one tube to the "B" valve and place the free end in the bucket.
5. Connect one of the tubes to the circulation pump outlet and the return water line at the "A" valve.
6. Connect one tube to the circulation pump inlet and place the free end in the bucket.
7. Pour the cleaning solution into the bucket.
8. Open both "A" and "B" valves.
9. Turn on the circulation pump and allow the solution to circulate through the boiler. Refer to the manufacturer's literature for information about the circulation time.
10. Rinse the cleaning solution from the boiler:
    1. Remove the free end of the drain tube from the bucket and place it in the condensate drain or laundry tub (wherever the boiler drains).
    2. Close the "A" valve and open the "C" valve. Do not open the "D" valve yet.
    3. Allow water to flow through the boiler for 5 minutes.
    4. Close the "B" valve and open the "D" valve.
11. Disconnect all tubes and valves.
12. Reconnect the power supply to the boiler.
13. Press the Power button on the front panel to turn on the boiler.

Troubleshooting

Solving Basic Problems

If you experience a problem with the boiler, refer to the following chart for possible remedies. Error codes that appear on the front panel display are explained in the following section.

For minor problems, resetting the boiler may resolve the issue. To reset the boiler, press the Reset button on the front panel.

If resetting the boiler and attempting the remedies suggested below do not resolve the problem, contact an authorized technician, a licensed professional, or Technical Support at 1-800-519-8794 for service instructions.

Problem	Possible Cause(s)	What to do
Space heating side malfunction	Is the setting temperature too low?	Check the boiler's temperature setting. See "3.2 Adjusting the Temperature".
	Is there power to the system, or is the system in stand by?	Make sure the power is on, and plugged into the outlet with the correct voltage. Press the Power button and raise the setting temperature. Make sure the boiler is turned on.
	Is the system running for domestic hot water (DHW)?	When the unit is heating for DHW, the heating side does not work.

Understanding Error Codes

When an error code appears on the front panel, refer to the following chart for a definition and possible remedy for the situation.

Error Code	Reason	Self-diagnostic/Action
E001	Heat exchanger over temperature	Auto reset/Manual reset/Power On reset
E003	Ignition failure	Manual reset/Power On reset
E004	False flame detection	Auto reset
E012	Flame loss	Manual reset/Power On reset
E016	Heat exchanger overheat	Manual reset/Power On reset
E030	Abnormal operation: exhaust temperature	Auto reset/Manual reset/Power On reset
E046	Abnormal operation: heat exchanger overheating sensor	Auto reset
E047	Abnormal operation: exhaust thermostat	Auto reset/Manual reset/Power On reset
E060	Abnormal operation: dual venturi	Alarm
E109	Abnormal operation: fan motor	Manual reset/Power On reset
E110	Exhaust vent closed	Manual reset/Power On reset
E205	Abnormal operation: heating supply thermistor	Auto reset
E218	Abnormal operation: heating return thermistor	Alarm
E271	Temperature differential limit	Alarm
E278	Abnormal operation: system supply thermistor	Alarm
E279	Abnormal operation: system return thermistor	Alarm
E291	Supply/Return inversion limit	Manual reset/Power On reset
E302	Low water pressure	Manual reset
E352	High water pressure	Auto reset
E353	Abnormal operation: water pressure sensor	Auto reset
E515	Abnormal operation: PCB component	Alarm/Manual reset/Power On reset
E517	Abnormal operation: DIP switch setting (PCB)	Manual reset/Power On reset
E594	Abnormal operation: EEPROM (PCB)	Alarm
E615	Abnormal operation: MCU	Alarm/Auto reset/Manual reset/Power On
E740	Abnormal operation: outdoor temperature sensor	reset Alarm
E777	Abnormal operation: LWCO limit (external device)	Auto reset
E782	Abnormal operation: boiler communication	Alarm
E784	Abnormal operation: zone controller communication (external device)	Alarm

If these remedies do not resolve the problem, contact Technical Support at 1-800-519-8794.

LIMITED WARRANTY NAVIEN, INC.

Warranty Period

Navien products come with a limited warranty covering labor, parts and the heat exchanger. The following warranty periods begin to run from the date of original installation. The date of original installation must be provided to Navien, and upon request, proof of the original installation date must also be provided to Navien. When the product is installed in a new construction, the commencement date shall be dated upon which the end-user takes title to the property.

APPLICABLE WARRANTY PERIOD

	Heat Exchanger	All other parts and components	Labor
Residential	15 years	5 years	1 year
Commercial	10 years	3 years	1 year

Warranty Claim Procedures

To obtain warranty repair service, the end user or homeowner must contact the original installer of your Navien product. If the original installer cannot be identified, the end user or homeowner may contact Navien's Technical Administration Department at (800) 519-8794. Proof of purchase is required to obtain warranty service.

Warranty Service

At its option, Navien will replace the defective component (part(s) or heat exchanger), in accordance with the terms of this Limited Warranty, if it fails in normal use and service during the applicable warranty period identified above. The replacement component must be Navien original factory component. Navien, at its sole discretion, may replace the product with a new or refurbished product of comparable quality and design. The replacement component or product will be warranted only for the unexpired portion of the original component's applicable warranty period. Payment for labor in completing the warranty service is subject to Navien's prior written approval and shall be subject to Navien's schedule of approved labor allowances.

Warranty Exclusions

Navien's Limited Warranty shall be void in the event of an occurrence of any of the following:

• Improper installation, failure to install in strict compliance with the Installation & Operation Manual procedures, installed by a non-licensed installer, and installation in violation of applicable rules, laws or building codes.
• Product purchased through the internet, other e-commerce channels, or any installer that obtained the product from a supplier or distributor not authorized by Navien.
• Failure to perform regular maintenance, misuse, operation at settings other than those recommended or specified, noncompliance with instructions or guidelines set forth in the User's Information Manual.
• Modification or alteration of the product in any manner, including but not limited to, removal of any component or part, addition of any non-approved components, relocating or moving the product from its original installation site, or any accidental or intentional damage to the Product.
• Installation for non-recommended uses.
• Any damage caused by local adverse conditions including but not limited to hard water deposits, lime or mineral build-up, operating in corrosive atmospheric elements.
• Damage or problems caused by gas flow issues, electrical surges, flooding, fire, abnormal external temperature, and any other cause of damage not directly caused by a manufacturing defect.
• Installer's failure to fully comply with the warranty service and return policy procedures previously provided to installer and as is available on Navien's website. Such policies include but are not limited to the installer's failure to first contact Navien Technical Support while in front of the product for purposes of trouble shooting the identified problem or issue.
• Performance problems caused by improper sizing of the boiler, the gas supply line, the venting connection, combustion air openings, electric service voltage, wiring, fusing or any other components, parts or specifications.
• Improper conversion from natural gas to LP gas or LP gas to natural gas or attempt to operate with a type of gas not specified for the boiler.
• Any damage, malfunction or failure caused by abuse, negligence, alteration, accident, fire, flood, freezing, wind, lightning and other acts of God.
• Operating, using or storing the boiler in a corrosive or contaminated atmosphere or environment.
• Operating the boiler at water temperatures outside the factory calibrated temperature limits and/or exceeding the maximum setting of the high limit control.
• Operating the boiler when it is not supplied with potable water at all times.
• Subjecting the heat exchanger to pressures or firing rates greater or lesser than those shown on the rating plate.
• Installation at any location outside the United States and Canada.
• Removal or alteration of the rating plate.

Other Terms: This Limited Warranty is subject further to the terms and conditions set forth herein and as may be further specified in the terms and conditions page located on Navien's website at www.navien.com. WITH THE EXCEPTION OF THIS LIMITED WARRANTY, NAVIEN DISCLAIMS ANY OBLIGATION OR LIABILITY WITH RESPECT TO THE PRODUCTS OR THEIR SALE AND USE, AND NAVIEN NEITHER ASSUMES NOR AUTHORIZES THE ASSUMPTION OF, ANY OBLIGATION OR LIABILITY IN CONNECTION WITH THE PRODUCTS. THIS DISCLAIMER INCLUDES ANY OTHER WARRANTIES, EXPRESS, IMPLIED OR STATUTORY RESPECTING THE PRODUCTS OR ANY PARTS OR COMPONENTS THEREOF, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Navien's total liability for any claim arising hereunder shall not exceed the purchase price which you paid for the product. NAVIEN SHALL NOT IN ANY EVENT BE LIABLE FOR INDIRECT, SPECIAL, CONSEQUENTIAL OR LIQUIDATED DAMAGES OR PENALTIES, INCLUDING CLAIMS FOR LOST REVENUE, PROFITS OR BUSINESS OPPORTUNITIES, EVEN IF NAVIEN HAD OR SHOULD HAVE HAD ANY KNOWLEDGE, ACTUAL OR CONSTRUCTIVE, OF THE POSSIBILITY OF SUCH DAMAGES.

Getting Service

If your boiler requires service, you have several options for getting service:

• Contact Technical Support at 1-800-519-8794 or on the website: www.navien.com.
• For warranty service, always contact Technical Support first.
• Contact the technician or professional who installed your boiler.
• Contact a licensed professional for the affected system (for example, a plumber or electrician).

When you contact Technical Support, please have the following information at hand:

• Model number
• Serial number
• Date purchased
• Installation location and type
• Error code, if any appears on the front panel display.

800.519.8794 | www.Navien.com
20 Goodyear lrvine, CA 92618

Documents / Resources

References

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