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Safety Information        3

WARNING

If you do not follow these instructions exactly, a fire or explosion 
may result causing property damage, personal injury or loss of 
life.

A.  This appliance does not have a pilot. It is equipped with an 

ignition device which automatically lights the burner. Do 
not try to light the burner by hand.

B.  BEFORE OPERATING smell all around the appliance area for 

gas. Be sure to smell next to the floor because some gas is 
heavier than air and will settle on the floor.

WHAT TO DO IF YOU SMELL GAS

 

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Do not try to light any appliance.

 

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Do not touch any electric switch; do not use any phone 
in your building.

 

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Immediately call your gas supplier from a neighbor’s 
phone. Follow the gas supplier’s instructions.

 

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If you cannot reach your gas supplier, call the fire 
department.

 

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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 qualified service technician to inspect 
the appliance and to replace any part of the control system 
and any gas control which has been under water.

The following safety symbols are used in this manual. Read and 
follow all safety instructions in this manual precisely to avoid 
unsafe operating conditions, fire, explosion, property damage, 
personal injury, or death. Keep this manual for future reference.

DANGER

Indicates an imminently hazardous situation which, if not 
avoided, could result in severe injury or death.

WARNING

Indicates a potentially hazardous situation which, if not 
avoided, may result in injury or death.

CAUTION

Indicates a potentially hazardous situation that, if not avoided, 
could result in property damage.

1.    Safety Information

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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