Navien NFB-175H, Руководство по установке, Страница: 8 / 135

8 About the Boiler
General Specifications
Item NFB-175H NFB-200H
Dimensions 17.3 in (W) x 17.3 in (D) x 27.6 in (H)
Boiler weight 121 lb (55 kg)
Boiler weight with water 148 lb (67 kg)
Installation Type Indoor Wall-Hung
Venting Type Forced Draft Direct Vent
Ignition Electronic Ignition
Natural Gas Supply Pressure (from source) 3.5 in–10.5 in WC
Propane Gas Supply Pressure (from source) 8.0 in–13.0 in WC
Natural Gas Manifold Pressure -0.03 to -0.70 in WC -0.03 to -0.85 in WC
Propane Gas Manifold Pressure -0.02 to -0.68 in WC -0.02 to -0.75 in WC
Gas Connection Size 3/4 in NPT
Power Supply
Main Supply 120V AC, 60Hz
Maximum Power
Consumption
Less than 15 amperes
Materials
Casing Cold-rolled carbon steel
Heat Exchangers Stainless Steel
Venting
Exhaust
2 in or 3 in PVC, CPVC, approved polypropylene*
2 in or 3 in Special Gas Vent Type BH (Class III, A/B/C)
2 in or 3 in Stainless Steel
Intake
2 in or 3 in PVC, CPVC, polypropylene
2 in or 3 in Special Gas Vent Type BH (Class III, A/B/C)
2 in or 3 in Stainless Steel, ABS
Vent Clearance 0 in to combustibles
Safety Devices
Flame Rod, APS, Ignition Operation Detector
Water Temperature High Limit Switch, Exhaust Temperature
High Limit Sensor, Water Pressure Sensor, Vent Installation
Detector (VID)
Temperature Setting Range
Item Temperature Setting Range Remarks
Space
Heating
Supply 77-190°F (25-88°C)
Actual supply and return
temperatures vary depending on
the selected outdoor reset curve.
Return 68–158°F (20-70°C)
Note
For more information about the space heating temperature setting range, refer to “11.5.2 Setting the
Space Heating Operation” on page 101.