Navien NHB-055 Installation & Operation Manual page 8

General Specifications
Item
Dimensions
Weight
Installation Type
Venting Type
Ignition
Natural Gas Supply Pressure (from source)
Propane Gas Supply Pressure (from source)
Natural Gas Manifold Pressure
Propane Gas Manifold Pressure
Gas Connection Size
Power Supply
Materials
Venting
Safety Devices
*Approved polypropylene systems include:
Duravent Polypro (Single Wall): 2PPS-xxx (2"), 3PPS-xxx (3")
Centrotherm Innoflue SW: ISxx02xx (2"), ISxx03xx (3")
Refer to manufacturer's literature for detailed information.
Temperature Setting Range
Item
Space Heating
For more information about the space heating temperature setting range, refer to "Setting the Heat Load for the Outdoor Reset
Note
Control Mode" on page 79.
8 About the Boiler
NHB-055
17in (W) x 12in (D) x 24in (H)
73 lb (33 kg)
Indoor Wall-Hung
Forced Draft Direct Vent
Electronic Ignition
3.5 in–10.5 in WC
8.0 in–13.5 in WC
-0.03 in WC
-0.03 in WC
3/4 in NPT
Main Supply 120V AC, 60Hz
Maximum Power
Less than 10 amperes
Consumption
Casing Cold-rolled carbon steel
Heat Exchangers Primary and Secondary: Stainless Steel
2 in or 3 in PVC, CPVC, approved polypropylene*
Exhaust
2 in or 3 in Special Gas Vent Type BH (Class III, A/B/C)
2 in or 3 in PVC, CPVC, polypropylene
Intake
2 in or 3 in Special Gas Vent Type BH (Class III, A/B/C)
Vent Clearance 0 in to combustibles
Flame Rod, APS, Ignition Operation Detector
Water Temperature High Limit Switch, Exhaust Temperature High Limit Sensor, Water
Pressure Sensor
Temperature Setting Range
Supply 77–194°F (25-90°C)
Return 68–158°F (20-70°C)
NHB-080 NHB-110
17in (W) x 13in (D) x 24in (H)
80 lb (36 kg)
-0.08 in WC -0.10 in WC
-0.07 in WC -0.09 in WC
Remarks
Actual supply and return temperatures vary
depending on the selected outdoor reset
curve.
NHB-150
-0.40 in WC
-0.30 in WC