• 90% AFUE:  ENERGY STAR
  • Capacity: 50, 75, 100 MBH
  • Heat Exchanger: Cast Aluminum
  • Combustion: Sealed Combustion
  • Venting: Direct Vent
  • Boiler Type: Hot Water
  • Boiler Control Module: HSI Integrated Boiler Control
  • Combination Hydrolevel High Limit and LWCO with boiler water temperature reset feature
  • Heat Exchanger: Cast Aluminum Heat Exchanger
  • Combustion: Stainless Steel Premix Burner
  • Induced Draft Blower with adjustable exhaust (front, right side or rear), Inducer Motor Assembly includes 5′ schedule 80 2″ CPVC and CPVC Tee
  • Electrical: Junction Box, Transformer and Wiring Harness
  • Textured Painted Steel Jacket
  • Other
    • Temperature/Pressure Gauge
    • 30 PSI Safety Relief Valve
    • Pressure Switch(es)
    • Low Profile Condensate Trap
    • Air Vent
    • Leveling Legs

  • Natural Gas or Propane
  • Taco or Grundfos Circulator

Easy to Install and Service:

  • Choice of multiple supply and return locations (top, side or combination)
  • Leveling legs
  • Junction box provided
  • Removable control panel for quick access
  • Low profile condensate trap provides easy plumbing of condensate drain lines

Brochure
Q90-100 Brochure Rev. 12/12
Q90-100 Brochure Rev. 8/04
Q90-100 Brochure Rev. 6/09
Q90-100 Brochure Rev. 4/08
Q90-100 Brochure Rev. 3/11
Q90-100 Brochure Rev. 12/07
Q90-100 Brochure Rev. 10/08
Q90-100 Brochure Rev. 1/09
Q90-100 Brochure Rev. 1/07
Q90-100 High Efficiency Homeowner Info
Engineering Documents / Resources
Q90-100 Series IV Spec Sheet Rev. 1.0
Installation & Operation Manual
Q90-100 IOM Rev. 3.4
Q90-100 IOM Rev. 3.0
Q90-100 Series II & III IOM Rev. D
Q90-100 IOM Rev. C
Q90-100 Series IV IOM Rev. B
Q90-100 IOM Rev. A
Q90-100 Series IV IOM Rev. C
Q90-100 Series II IOM Rev. B
Q90-100 Series II IOM Rev. A
Q90-100 Series IV IOM Rev. D
Kit Instruction
90 Series IV High Altitude Gas Conversion Kit Instructions Rev. E
90 Series Conversion Kit Instructions DSI to HSI Rev. A
Options
Q90-100 Manufacturers Tax Certification Statement Rev. C
Q90-100 Manufacturers Tax Certification Statement Rev. B
Q90-100 Tax Certification Statement Rev. A
Other
Q90-100 Igniter Kit Instructions Rev. 1.0
Q90-100 Series II & Series II Gas Conversion Instructions Rev. B
Q90-100 Series II & III Igniter Kit Instructions Rev. F
Q90-100 Series II & III Igniter Kit Instructions Rev. E
Q90-100 Series II & III Igniter Kit Instructions Rev. D
Q90-100 Series II Gas Conversion Instructions Rev. A
Q90-100 Series II & Series III Gas Conversion Instructions Rev. C
Parts Lists
Q90-100 Series II & III Parts Rev. C
Q90-100 Parts Rev. A
Q90-100 Series IV Parts Rev. D
Q90-100 Series IV Parts Rev. C
Q90-100 Series IV Parts Rev. B
Q90-100 Series II Parts Rev. A
Q90-100 Series II Parts Rev. B
Q90-100 Series IV Parts Rev. F
Q90 Series 4 Parts List Rev. G
Product Bulletin
Q90-100 Dielectric & Antifreeze Addendum Rev. D
Q90-100 Burner Change Rev. 10/06
Q90-100 Antifreeze & Dielectric Rev. 6/09
Q90-100 Igniter Change Bulletin 6/19/09
Q90-100 Dielectric & Antifreeze Addendum Rev. E
Q90-100 Series Inducer Technical Bulletin 8/19/09
Service Bulletin
Q90-100 Norton Igniter Rev. 12/04
Q90-100 Igniter & Ground Wires Rev. 1/03
Technical Bulletin
Dielectric Unions and Antifreeze Requirements
Ignitor Change – Product Improvement
Q90-100 Direct Spark Ignition to Hot Surface Ignition Upgrade
New Inducer Motor/Blower Assembly
Burner Change on Q90-100
Hot Surface Igniter Change
User Manual
Q90-100 User’s Manual Rev. 1.0
Warranty
Q90-100 Dunkirk Consolidated Boiler Warranty Rev. B
Q90-100 Warranty Rev. 2.0
Q90-100 Series IV Warranty Rev. A
Dunkirk Consolidated Boiler Warranty Rev. D
Dunkirk Consolidated Boiler Warranty Rev. E