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24        Warranty

Warranty Limitations

EXCEPT AS EXPRESSLY PROVIDED HEREIN, THERE ARE NO OTHER 

WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING, BUT NOT 

LIMITED TO WARRANTIES OR MERCHANTABILITY OR FITNESS FOR A 

PARTICULAR PURPOSE, WHICH EXTEND BEYOND THE DESCRIPTION 

OF THE WARRANTY HEREIN AND FURTHER NAVIEN SHALL NOT BE 

LIABLE FOR INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, 

PUNITIVE OR OTHER SIMILAR DAMAGES THAT MAY ARISE, 

INCLUDING LOST PROFITS, DAMAGE TO A PERSON OR PROPERTY, 

LOSS OF USE, INCONVENIENCE, OR LIABILITY ARISING FROM 

IMPROPER INSTALLATION, SERVICE OR USE OF THE PRODUCT. 

ANY IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 

ARISING UNDER STATE LAW ARE LIMITED IN DURATION TO THE 

PERIOD OF COVERAGE PROVIDED BY THIS WARRANTY, UNLESS THE 

PERIOD PROVIDED BY STATE LAW IS LESS.

No one is authorized to make any other warranties on behalf of 

Navien. Some states do not allow the exclusion or limitation of 

incidental or consequential damages, or how long an implied 

warranty lasts, so the above limitation may not apply to you.

This Limited Warranty gives you specific legal rights and you may 

also have other rights which vary from state to state.

What is not covered?

Navien’s Limited Warranty shall be void in the event of an 

occurrence of any of the following:

 

Improper installation, including but not limited to, installation in 

violation of applicable rules, laws or building codes, inadequate 

water quality, condensate damage, improper venting, incorrect 

gas type, water pressure, absence of a drain pan, improper 

conversion from Natural Gas source to Propane, reinstallation at 

another location, etc.

 

Accident, abuse or misuse including but not limited to 

installation for non- recommended uses, failure to follow or 

comply with the User’s Operational Manual, etc.

 

Improper maintenance including but not limited to, scale 

buildup, vent blockage, failure to maintain, etc.

 

Modification, alteration, addition of non-approved components, 

or misapplication of the Product in any manner.

 

Any damage caused by local adverse conditions including 

but not limited to water quality, hard water deposits, lime or 

mineral build-up, operating in corrosive atmospheric elements, 

alterations in smell or taste of water that have an adverse 

reaction on the unit, etc.

 

Damage or problems caused by gas flow issues, electrical surges, 

flooding, fire, freezing, abnormal external temperature, force 

majeure, riot, act of war, or any acts of God.

 

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.

 

Vibration and noise unless caused by a defect in materials or 

workmanship. Any other causes other than defects in materials 

or workmanship.

 

Operating the Product at water temperatures outside the factory 

calibrated temperature limits and/or exceeding the maximum 

setting of the high limit control.

 

Subjecting the heat exchanger to pressures or firing rates 

greater or lesser than those shown on the rating plate or 

removal of or alteration to the rating plate.

 

Installation at any location outside the United States or Canada.

 

Improper conversion from natural gas to liquid propane gas or 

liquid propane gas to natural gas or attempt to operate with a 

type of gas not specified for the boiler.

 

Accidental or intentional damage.

There is no warranty on any Product purchased through the 

internet or from any installer that obtained the Product from a 

supplier or distributor not authorized by Navien.

Summary of Contents for NFC Series

Page 1: ...ontact 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...

Page 2: ...ilding Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions If you cannot reach your gas supplier call the fire department Installation and service must be...

Page 3: ...iler On or Off 9 3 2 Adjusting the Temperature 9 3 3 Accessing Basic Menu Items 10 3 4 Resetting the Boiler 11 4 Maintaining the Boiler 12 4 1 Cleaning the Boiler 12 4 2 Draining the Boiler 12 4 3 Cle...

Page 4: ...pplier call the fire department Do not return to your home until authorized by your gas supplier or the fire department C Do not use this appliance if any part has been under water Immediately call a...

Page 5: ...for use in the USA and Canada only Using the boiler in any other country will void the manufacturer s warranty Should overheating occur or the gas supply fail to shut off turn off the manual gas valve...

Page 6: ...0 F 55 C 10 seconds 120 F 49 C 10 minutes 100 F 37 C very low scald risk DANGER HOT BURN To prevent burns Use the lowest operating temperature setting necessary to provide comfortably hot water If you...

Page 7: ...eze 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 Shor...

Page 8: ...when the boiler is operating in anti freeze mode Auto air purge Displayed when an auto air purge is being performed e Cascade Main mode Flashes when configuring a cascade system Turns on solid if the...

Page 9: ...for the boiler s operation such as space heating and DHW supply temperatures Refer to the following table for detailed information a Back button Return to the previous menu or screen b Mode button En...

Page 10: ...ion 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...

Page 11: ...configure the space heating and DHW temperatures and review error history Press the Menu button to enter the Main Menu screen To view information about the boiler press the Menu button and then select...

Page 12: ...or contact Technical Support at 1 800 519 8794 Item Description 1 Operation State Current Operation State 2 Heat Capacity Heat Capacity 3 SH Set Temp Space Heating Set Temperature F 4 DHW Set Temp DH...

Page 13: ...ture resistant but it is not waterproof Keep it as dry as possible 4 2 Draining the Boiler You will need to drain the boiler before performing maintenance tasks such as to prevent the boiler from free...

Page 14: ...e 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 Unfasten the 4 latches 2 at th...

Page 15: ...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...

Page 16: ...enwillnotwarrant 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 pro...

Page 17: ...e 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 substa...

Page 18: ...ts 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 plu...

Page 19: ...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 c...

Page 20: ...r for 5 minutes d Close the A valve and open the C 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 boil...

Page 21: ...er to 3 2 Adjusting the Temperature on page 9 Check for cross piping between the cold and hot water lines The water from the hot water faucet is too hot Is the set temperature set too high Check the b...

Page 22: ...Manual RESET E110 Abnormal air pressure Manual RESET E205 Heating supply thermistor open or short circuit Auto RESET E218 Heating return thermistor open or short circuit Auto RESET E278 Abnormal oper...

Page 23: ...ration outdoor temperature sensor appears only when the outdoor reset curve is enabled Alarm E761 Abnormal Operation Pre Heat Aquastat Alarm E777 LWCO service code 7700 external device Auto RESET E782...

Page 24: ...riod replacement of the Product or components may be authorized by Navien only Navien does not authorize any person or company to assume for it any obligation or liability in connection with the repla...

Page 25: ...tion for non recommended uses failure to follow or comply with the User s Operational Manual etc Improper maintenance including but not limited to scale buildup vent blockage failure to maintain etc M...

Page 26: ...Memo...

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