• Efficiency: Mid-Efficiency
  • Heat Exchanger: Cast Iron Heat Exchanger
  • Combustion: Atmospheric
  • Venting: Chimney Vent
  • Boiler Type: Hot Water
  • Available in 9 sizes from 50 MBH to 299 MBH.
  • Dependable Cast Iron Heat Exchanger with Cast Iron Push Nipples. The Sections and Push Nipples expand at the same rate when heated. By using similar materials instead of less expensive gaskets the boiler maintains a water tight seal over time.
  • Hydrolevel FuelSmart Control
  • With durable protective cover and viewing window.
  • Digital temperature display and diagnostics.
  • Plug in connection for the vent damper.
  • Plug in connection for the system pump.
  • Control monitors water temperature and delays burner start until residual heat has been transferred to the system for maximum efficiency.
  • Atmospheric Chimney Vent Boiler with Integral Draft Hood and Automatic Vent Damper.
  • Stainless Steel Main Gas Burners (MGB)/Titanium Composite Burners (MGC), Combination 24 Volt Gas Control (Includes: Automatic Gas Valve, Gas Pressure Regulator, Automatic Pilot,Safety Shutoff, Pilot Flow Adjustment, Pilot Filter), Intermittent Pilot Control, Continuous Retry, Combination Pilot Burner/Electrode/Flame Sensor.
  • Spill Switch and Roll-Out Switch for safety (MGB)/Flame Roll-Out Safety Shut-Off (Fuse Link)(MGC).
  • Texture Painted Jacket.
  • Limited Lifetime Warranty (Residential Applications).

  • Natural Gas or Propane
  • Central Heating Pump(Taco, Grundfos, B&G or Less Pump)
  • LP Conversion Kit
  • Fill-Trol

Sorry, There are no current documents for this product!
Brochure
MGB Series II/MGC Series Brochure Rev. 5/17
MGB Series II/MGC Series Brochure Rev. 10/17
MGB Series II / MGC Brochure Rev. 1/28/20
MGB Series II/MGC Series Rev. 11/14
MGB Series II/MGC Series Rev. 10/13
MGB Series II/MGC Series Brochure Rev. 8/13
MGB Series II/MGC Series Brochure Rev. 8/12
MGB Series II/MGC Series Brochure Rev. 3/13
MGB Series Brochure Rev. 10/06
MGB Series Brochure Rev. 10/08
Engineering Documents/Resources
MGB Series II/MGC Series Gas Conversion Kit Instructions Rev. B
MGB Series II/MGC Series Gas Conversion Kit Instructions Rev. A
MGB Series II Gas Conversion Kit Instructions Rev. C
MGB Spec Sheet Rev. 1.0
MGB Series II Spark Pilot Retrofit Instructions Rev. A
Installation & Operation Manual
MGB Series II IOM Rev. E
MGB Series II IOM Rev. D
MGB Series II IOM Rev. C
MGB Series II IOM Rev. B
MGB Series II IOM Rev. D 02/14
MGB Series II IOM Rev. C 05/11
MGB Series II IOM Rev. B 02/09
MGB Series II IOM Rev. A
MGB Series II IOM Rev. 14.1
MGB Series II IOM Rev. G
Other
MGB Metric Orifice Change Rev. B
MGB Metric Orifice Change Rev. A
MGB Wiring Addendum Rev. 4.0 5/04
Parts Lists
MGB Series II Parts Rev. E
MGC Series Parts Rev. A
MGC Series Parts Rev. A – 03/13
MGB Series II Parts Rev. B
MGB Series II Parts Rev. A
MGB Series II Parts Rev. C 1/13
MGB Series II Parts Rev. C 7/13
MGB Series II Parts Rev. D 5/14
MGB Series II Parts Rev. C – Honeywell Control
MGB Series II Parts Rev. A – Hydrolevel Control
Product Bulletin
MGB Heat Exchanger Revision – 1
Service Bulletin
MGB Pilot Orifice Change – 1
MGB Crate Change
MGB Burner Change
MGB Pilot Orifice Change
MGB Pilot Change Product Bulletin 7808
Technical Bulletin
MGB Honeywell Control and Pilot Change
MGB Heat Exchanger Revision
User Manual
MGB User’s Manual Rev. B
Warranty
MGB Residential Warranty Rev. 3.0 – 2
MGB Residential Warranty Rev. 2.0
MGB Residential Warranty Rev. 3.0 – 1
MGB Residential Warranty Rev. 2.0 01/04
MGB Residential Warranty Rev. 3.0 04/08