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4        Safety Information

CAUTION

 

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Do not attempt to repair or replace any part of the boiler, 
unless it is specifically recommended in this manual. 

For all other service, contact an authorized technician or 
licensed professional. Improper adjustments, alterations, 
service, or maintenance may lead to property damage, 
personal injury, or death and will void your warranty.

 

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Do not operate the boiler if you feel something is wrong 
with it.

 

Doing so may result in product damage or personal injury.

 

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Do not allow children to operate or access the boiler.

 

Doing so may result in product damage or personal injury.

 

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Do not turn on the boiler unless the water and gas 
supplies are fully opened.

 

Doing so may damage the boiler.

 

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Do not use this boiler for anything other than its 
intended purpose, as described in this manual.

 

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Do not remove the front cover unless the power to the 
boiler is turned off or disconnected.

Failure to do so may result in electric shock.

 

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When servicing the controls, label all wires prior to 
disconnecting them.

Failure to do so may result in wiring errors, which can lead to 
improper or dangerous operation.

 

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Do not use unapproved replacement or accessory parts.

 

Doing so may result in improper or dangerous operation 
and will void the manufacturer’s warranty.

 

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Do not place anything in or around the vent terminals, 
such as a clothes line, that could obstruct the air flow in 
or out of the boiler.

 

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This boiler has been approved for use in the USA and 
Canada only.

 

Using the boiler in any other country will void the 
manufacturer’s warranty.

 

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Should overheating occur or the gas supply fail to shut 
off, turn off the manual gas valve to the appliance.

WARNING

 

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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 demonstrate how to close the valve. 
If the boiler is damaged as a result of overheating, fire, flood, 
or any other reason, close the manual shut off valve and do 
not operate the boiler again until it has been inspected by a 
qualified technician.

 

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Do not store or use gasoline or other flammable liquids 
near this boiler.

Doing so may result in fire or explosion.

 

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Do not place combustibles, such as newspapers or 
laundry, near the boiler or venting system.

Doing so may result in a fire.

 

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Do not place or use hair sprays, spray paints, or any other 
compressed gases near the boiler or venting system, 
including the vent termination.

Doing so may result in fire or explosion.

 

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Do not operate the boiler with the front cover opened.

 

Doing so may result in fire or carbon monoxide (CO) 
poisoning, which may result in property damage, personal 
injury, or death.

 

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Do not operate this boiler without proper venting.

 

Doing so may result in fire or carbon monoxide (CO) 
poisoning, which may result in property damage, personal 
injury, or death. Inspect the vent termination and air intake 
supply annually to ensure proper operation of the boiler. 
Turn off and discontinue use of the boiler if any of the vent 
pipes, vent elbows, or intake pipes are damaged in any way, 
separated at a joint, or show evidence of corrosion, rusting, 
or melting.

 

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Do not touch the power cord or internal components of 
the boiler with wet hands.

Doing so may result in electric shock.

 

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Do not make any electrical connections before turning 
off the electrical power supply at service entrance panel.

Doing so may result in severe personal injury or death.

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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