Navien NHB-055 Installation & Operation Manual
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Navien NHB-055 Installation & Operation Manual

Nhb condensing boilers
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See also: Service Manual , Operation & Installation Manual
Installation & Operation Manual
NHB Condensing Boilers
Model
NHB-055
NHB-080
NHB-110
NHB-150
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
Do not try to light any appliance.
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 gas supplier, call the fire department.
Installation and service must be performed by a qualified installer, service agency or the gas
supplier.
The installation must conform with local codes or, in the absence of local codes, the National Fuel
Gas Code, ANSI Z223.1/NFPA 54 and/or CSA B149.1, Natural Gas and Propane Installation Code.
Keep this manual near this boiler for future
reference whenever maintenance or service
is required.

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Summary of Contents for Navien NHB-055

  • Page 1 Installation & Operation Manual NHB Condensing Boilers Model NHB-055 NHB-080 NHB-110 NHB-150 Keep this manual near this boiler for future reference whenever maintenance or service is required. WARNING If the information in these instructions is not followed exactly, a fire or explosion may result, causing property damage, personal injury, or death.
  • Page 2 12.4 Component Assembly Diagrams and Parts Lists 12.4.1 Case Assembly Appendixes...
  • Page 3 Description Part # Remark 20030085A NHB-110/150 Case 20030088A NHB-055/080 Cover 30013463A 30013044A Front Panel 30013041A Exhaust Pipe Assembly 30008673A Intake Air Duct Assembly 30008662B Intake Air Fillter 20007667A Air Pressure Sensor 30010238A Rubber Ring 20029318A PCB Lower Bracket 20030117A Appendixes...

  • Page 4: Heat Exchanger And Waterway Assembly

    12.4.2 Heat Exchanger and Waterway Assembly 23-1 Appendixes...
  • Page 5 Description Part # Remark 30014219A NHB-150 30013575A NHB-110 Heat Exchanger Assembly 30014060A NHB-080 30014218A NHB-055 O-Ring (P29) 20032163A NHB-110/150 O-Ring (Φ17.5x2.7t) 20003022A NHB-055/080 20017724A NHB-110/150 Fastener 20007853A NHB-055/080 High Limit Switch 30002558A 30014032A NHB-110/150 SC Outlet Adapter 30014067A NHB-055/080 Thermistor...

  • Page 6: Combustion Parts Assembly

    12.4.3 Combustion Parts Assembly 10-1 10-2 10-3 Appendixes...
  • Page 7 NHB-150 10-3 Intake Pipe 20030064A NHB-110 20031243A NHB-055/080 Orifice Packing 20022660A 20032404A NHB-150 (NG) 20032403A NHB-110 (NG) 20032402A NHB-055/080 (NG) Gas Orifice 20032407A NHB-150 (LP) 20032406A NHB-110 (LP) 20032405A NHB-055/080 (LP) O-Ring (P34) 20019090A 30013955A NHB-150 Gas Pipe 30013509A NHB-110...

  • Page 8: Outdoor Temperature Sensor

    When necessary, shielded cable may be used. Make sure wiring connections are secure before closing the cap. The sensor is a water resistant device. Any damage to the device may require the replacement of the entire component. Navien Outdoor Temperature Sensor Kit Appendixes...

  • Page 9: Outdoor Reset Control

    12.6 Outdoor Reset Control Outdoor Temperature Sensor Installation Guidelines The Outdoor Reset Control feature may be used to enhance energy Supply Set Point Return Set Point efficiency while maintaining optimal heating performance. With Heat Load Range Range the Outdoor Reset Control, the space heating temperature setting automatically changes according to the outdoor temperature and Finned Tube 120-180°F...
  • Page 10 Memo...

  • Page 11: Getting Service

    Getting Service If your boiler requires service, you have several options for getting service: Contact Technical Support at 1-800-519-8794 or on the website: www.navien.com. For warranty service, always contact Technical Support first. Contact the technician or professional who installed your boiler.

This manual is also suitable for:

Nhb-110Nhb-150Nhb-080

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