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Warranty        21

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.

LIMITED WARRANTY NAVIEN, INC.

Summary of Contents for NHB-110

Page 1: ...nce Do not touch any electrical switch do not use any phone in your building Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions If you cannot reach your...

Page 2: ...oiler On or Off 8 3 2 Adjusting the Temperature 8 3 3 Viewing Basic Information 9 3 4 Resetting the Boiler 10 4 Maintaining the Boiler 11 4 1 Cleaning the Boiler 11 4 2 Draining the Boiler 11 4 3 Clea...

Page 3: ...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 4: ...shut off turn off the manual gas valve to the appliance WARNING Shut off the gas supply if the boiler is damaged Have your installer or plumber show you the location of the gas shut off valve and dem...

Page 5: ...e 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 e...

Page 6: ...peration Refer to the following table for detailed information a Space heating mode f S Supply water control Indicates space heating mode operation Indicates supply water control status b Error g R Re...

Page 7: ...ler s operation such as space heating and DHW supply temperatures Refer to the following table for detailed information k Diagnostics button n Up button For installers only Increases the temperature l...

Page 8: ...fault 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...

Page 9: ...Low mass radiant 5 High mass radiant 6 Radiator 7 Custom set by installer 3 2 2 Adjusting the DHW Indirect Supply Temperature To adjust the water temperature 1 Press the Mode button twice The DHW mod...

Page 10: ...ooting section of this manual or contact Technical Support at 1 800 519 8794 Display Description psi O R S R Pri Boost interval time set by installer psi O R S R Pri Space heating water pressure in PS...

Page 11: ...e 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 freezin...

Page 12: ...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 MODE 2 Disconnect the power supply to the boiler 3 Remov...

Page 13: ...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 14: ...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 maintain...

Page 15: ...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 16: ...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 17: ...r 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 contra...

Page 18: ...inutes d 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 To flu...

Page 19: ...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...

Page 20: ...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...

Page 21: ...uct 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 s...

Page 22: ...F NAVIEN HAD OR SHOULD HAVE HAD ANY KNOWLEDGE ACTUAL OR CONSTRUCTIVE OF THE POSSIBILITY OF SUCH DAMAGES Warranty Exclusions Navien s Limited Warranty shall be void in the event of an occurrence of any...

Page 23: ...Memo...

Page 24: ...er 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 num...

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