Navien NHB-055 User's Information Manual - 1.    Safety Information

Manual is about: NHB series Condensing Boilers

Summary of NHB-055

  • Page 1

    Warning if the information in these instructions is not followed exactly, a fire or explosion may result, causing property damage, personal injury, or death. Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. What to do if you smell gas...

  • Page 2: Contents

    2 contents contents 1. Safety information 3 2. About the boiler 5 2.1 description of the boiler 5 2.2 parts of the boiler 5 2.3 the front panel 6 3. Operating the boiler 8 3.1 turning the boiler on or off 8 3.2 adjusting the temperature 8 3.3 viewing basic information 9 3.4 resetting the boiler 10 4...

  • Page 3: 1.    Safety Information

    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 ...

  • Page 4

    4 safety information caution Ɣ 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 pr...

  • Page 5: 2.    About The Boiler

    About the boiler 5 2.2 parts of the boiler 2.2.1 front view exhaust gas vent combustion air intake 2.2.2 bottom view a b c d e # description a rubber grommets b condensate outlet c gas connection d space heating supply connection e space heating return connection 2.1 description of the boiler the na...

  • Page 6

    6 about the boiler 2.3 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. 2.3.1 icons and digital display the icons and digital display on the front panel provide importa...

  • Page 7

    About the boiler 7 2.3.2 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 informa...

  • Page 8: 3.    Operating The Boiler

    8 operating the boiler 2. Press the + (up) or – (down) buttons until the desired temperature appears on the display. Mode you can adjust the temperature while the display is flashing. Once the display stops flashing, the temperature setting is stored. Note Ɣ the outdoor reset control will take prece...

  • Page 9

    Operating the boiler 9 3.3 viewing basic information to view information about the boiler, press the mode button three times. “info” will appear on the display. Mode press the + or – buttons to switch between the information types. Display description psi o/r s r pri space heating supply water tempe...

  • Page 10

    10 operating the boiler 3.4 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. Mode if resetting the boiler does not solve the problem, refer to the troubleshooting section of this manual or contact ...

  • Page 11

    Maintaining the boiler 11 4.1 cleaning the boiler caution 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....

  • Page 12

    12 maintaining the boiler 4.3 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...

  • Page 13

    Maintaining the boiler 13 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 complet...

  • Page 14

    14 maintaining the boiler 4.5 maintenance schedules owner maintenance daily Ɣ check the boiler area is free of combustible/flammable materials and air contaminants. Ɣ check the pressure/temperature gauge for signs of higher than normal pressure. Monthly Ɣ visually inspect the vent piping for signs o...

  • Page 15

    Maintaining the boiler 15 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 b...

  • Page 16

    16 maintaining the boiler 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 ens...

  • Page 17

    Maintaining the boiler 17 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 boi...

  • Page 18

    18 maintaining the boiler 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 ...

  • Page 19: 5.    Troubleshooting

    Troubleshooting 19 mode 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 ...

  • Page 20

    20 troubleshooting 5.2 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 e0...

  • Page 21

    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 orig...

  • Page 22

    22 warranty Ɣ 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. Ɣ any damage, malfunction or failure caused by abuse, negligence, alteration, accident, fire, flood, freezing, wind, lightning and other acts o...

  • Page 23: Memo

    Memo.

  • Page 24

    Getting service if your boiler requires service, you have several options for getting service: Ɣ contact technical support at 1-800-519-8794 or on the website: www.Navien.Com. Ɣ for warranty service, always contact technical support first. Ɣ contact the technician or professional who installed your ...