Navien Condensing Gas Combination Boiler NCB-180

NCB-180

• Super condensing efficiency
• Dual stainless steel heat exchangers
• SCH40, 2” PVC venting up to 60’
• ½” Gas pipe up to 24’
• Automatic water filling system
• integrated controls

• Ultra Condensing Efficiency

  • Navien’s Condensing Technology offers the high efficiency.
  • Money and energy savings over tank type water heaters and traditional water heaters.
• 

  Two Stainless Steel Heat Exchangers

  • Provides longer life expectancy as they are highly resistant to corrosion and erosion compared to copper heat exchangers.
  • Reduces minerals deposits.
• 

  Low NOx Emissions (≤ 20ppm)

  • New metal fiber burner is designed to deliver a consistent air/gas mixture improving combustion efficiency.
  • Result in less acid rain and less green house effect.
  • Comply with SCAQMD 1146.2 strict NOx emissions standard.
• 

  2” PVC, CPVC, Polyprophylene Venting Up To 60’

  • 2” venting option allows for a flue to be pulled through the existing vent.
  • 3” vents can be used up to 150’ with standard 2” x 3” adapters.
• 

  Utilizes Existing 1/2″ Gas Line

  • The negative pressure gas valve and fan with dual venturi operation allows for better adaptability to low gas pressure applications.
  • Makes it possible for the NPE to be installed ½” gas lines up to 24’.
• 

  Field Convertible

  • NCB models allow for easy convertibility from NG to LP.
• 

  Where Technology Meets Ecology, Combination Boiler

  • The ideal solution for customers who need both domestic hot water and a space heating application.
  • Heats water when needed, making it environmentally sound as well as cost efficient.
• 

  Hydronic Heating Benefits

  • Clean: little chance to cause dust or lower humidity because there is no air movement.
  • Silent: offers silent heating because no blowers are needed for forced circulation.
  • Comfort: keeps floors warm but indoor air fresh, making people feel warm and comfortable.
  • Coverage: radiant heat makes heating from floor to ceiling possible.
  • Economical: radiant heat in the floors can transmit warmth throughout the house hours after turning off the heater.
• 

  Automatic Water Filling System

  • Automatically fills water into space heating pipes when the unit senses a water shortage.
• 

  Powerful Anti-Freeze Feature

  • The Combi’s built-in Control System is designed to keep the unit’s plumbing frost free in winter conditions.

  Data Field		NCB-180
  Gas Input	Space Heating	14,000-80,000 BTU/H
  	Domestic Hot Water	14,000-150,000 BTU/H
  Flow Rate (DHW)	77°F (43°C) Temp Rise	3.4 GPM (12.9 L/m)
  Dimensions		17″(W) x 28″(H) x 12″(D)
  Weight		74 lbs (34kg)
  Installation Type		Indoor Wall-Hung
  Venting Type		Forced Draft Direct Vent
  Ignition		Electronic Ignition
  Water Pressure (Hydronic/DHW)		12-30 PSI / 15-150 PSI
  Natural Gas Supply Pressure (from source)		3.5″-10.5″ WC
  Propane Gas Supply Pressure (from source)		8.0″-13.5″ WC
  Natural Gas Manifold Pressure (min to max)		-0.07″ WC to -0.66” WC
  Propane Gas Manifold Pressure (min to max)		-0.06″ WC to -0.62″ WC
  Minimum Flow Rate (DHW)		0.5 GPM (1.9 L/m)
  Connection Sizes	Heating Supply/Return	1″ NPT
  	DHW Inlet/Outlet	3/4″ NPT
  	Gas Inlet	3/4″ NPT
  	Auto Feeder	1/2″ NPT
  	Condensate Outlet	1/2″ NPT
  Power Supply	Main Supply	120V AC, 60Hz
  	Maximum Power Consumption	200W (up to 2 amperes)
  Materials	Casing	Cold Rolled Carbon Steel
  	Heat Exchangers	Primary/Secondary Heat Exchanger: Stainless Steel DHW Heat Exchanger: Stainless Steel
  Venting	Exhaust	2” or 3″ PVC, CPVC, Polypropylene 2” or 3″ Special Gas Vent Type BH (Class II, A/B/C)
  	Intake	2” or 3″ PVC, CPVC, Polypropylene 2” or 3″ Special Gas Vent Type BH (Class II, A/B/C)
  	Vent Clearances	0″ to Combustibles
  Safety Devices		Flame Rod, APS, Gas Valve Operation Detector, Ignition Operation Detector, Water Temperature High Limit Switch, Exhaust Temperature High Limit Sensor