Navien NHB-055 Service Manual page 17

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
Accessories
Water Pressure
Water Connection Size (Supply, Return)
NOTE
This unit may be installed at an altitude of 10,100 ft. (3,078 m) for natural gas, and at 4,500 ft. (1,370 m) for propane. Refer to "4.1.1 PCB DIP
Switches" to correctly adjust the altitude settings. At altitudes above 2,000 ft. (610 m), the boiler's rating will reduce by 4% for each 1,000
ft. (305m) in altitude.
Version 1.0
17in. (W) x 12in. (D) x 24in. (H)
73 lbs. (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 Clearances 0 in. to combustibles
Flame Rod, APS, Ignition Operation Detector Water Temperature High Limit Switch,
Exhaust Temperature High Limit Sensor, Water Pressure Sensor
Navien Manifold System, Condensate Neutralizer Kit, Zone Controller,
System Supply / Return Temperature Sensors, Condensate Neutralizer
12~30 psi
1 in NPT
NHB-055 NHB-080
-0.08 in. WC
-0.07 in. WC
NHB-110 NHB-150
17in. (W) x 13in. (D) x 24in. (H)
80 lbs. (36 kg)
-0.10 in. WC -0.40 in. WC
-0.09 in. WC -0.30 in. WC
NHB Service Manual 17