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Home » Products » Boilers - Condensing Gas » Helix VLT Vertical Laser Tube, Wall Hung Modulating Condensing Boiler
  • VLT

    VLT

  • Boiler Front - Covers Off

    Boiler Front - Covers Off

  • Low Water Cut Off

    Low Water Cut Off

  • Top View

    Top View

  • Bottom View

    Bottom View

  • Back View

    Back View

  • Argus Vision Control with simple text display

    Argus Vision Control with simple text display

  • Heat Exchanger View

    Heat Exchanger View

  • Flue Collector

    Flue Collector

  • Removable Terminal Block

    Removable Terminal Block

Helix VLT Vertical Laser Tube, Wall Hung Modulating Condensing Boiler

This product has been archived and is no longer available.

Helix VLT

Innovative. Efficient. Dependable. Dunkirk.

The Dunkirk VLT features 95% AFUE. Plus:

  • Built-In Primary/Secondary Piping
  • Built-In Low Water Cut Off
  • 5:1 Turn Down Ratio
  • Approved for PVC, CPVC and Polypropylene venting
  • Patented Heat Exchanger, Patent No. 10,012,413 
  • Low Maintenance, Self-Cleaning
  • Designed in the US, for the US
  • 150 psi MAWP
  • ENERGY STAR® Certified

Features

  • Efficiency: ENERGY STAR® Certified
  • Capacity: 50, 75, 100, 150, & 200 - All Dunkirk Helix VLT capacities are 95% efficient
  • Patented Heat Exchanger: Direct Vent, Patent No. 10,012,413 
  • Combustion: Sealed Combustion
  • Venting: Direct Vent
  • Boiler Type: Hot Water
  • Wall Mount: Bracket included.
  • Boiler Control Module: Automatic Line Voltage/Intermittent Direct Spark Ignition/Modulating with a 5:1 combustion turn down ratio. For multiple boiler applications - the control module can stage fire up to 16 boilers.
  • User Display Interface: Easy programming with text display. Outdoor Temperature Sensor included.
  • Heat Exchanger: High grade 316L/444 Stainless Steel Fin Coil with Flame Sight Glass.
  • Built-in Primary/Secondary Manifold Piping and Pump.
  • Combustion: Gas Valve with Premix Venturi and Blower, Durable Stainless Steel Mesh Modulating Burner with 5:1 turn down ratio, Direct Spark Igniter, Flame sensor and LP Conversion Kit included.
  • Electrical: Detachable Low Voltage Terminal Strip, High Voltage Junction Box and Transformer.
  • Other
    • Factory installed probe-type Low Water Cut Off with test feature
    • 30 PSI Safety Relief Valve
    • Boiler Drain Valve and Condensate Drain with built in trap.

Options

  • Central Heating Pump available for 50 to 200 MBH (Taco 007 or Grundfos UP15-42F).
  • Concentric Vent Kit (2" and 3").
  • Floor Stand Kit.
  • System Sensor (For Multiple Boiler Applications).

Documents / Resources

Current Documents
Archived Documents
Videos

There are no active documents for this product.

Brochure

Helix VLT Brochure Rev. 1-16
Helix VLT Brochure Rev. 1/13
Helix VLT Brochure Rev. 1/14
Helix VLT Brochure Rev. 1/15
Helix VLT Brochure Rev. 10/11
Helix VLT Brochure Rev. 11/12
Helix VLT Brochure Rev. 12/11
Helix VLT Brochure Rev. 2/14
Helix VLT Brochure Rev. 3/12
Helix VLT Brochure Rev. 3/12B
Helix VLT Brochure Rev. 5/11
Helix VLT Brochure Rev. 6/11
Helix VLT Brochure Rev. 6/13
Helix VLT Brochure Rev. 8/13
Helix VLT Brochure Rev. 9/13
VLT Brochure Rev. 09-10-21
VLT Brochure Rev. 2/19
VLT Brochure Rev. 9/20
VLT Brochure, Rev. 2/17
VLT Brochure, Rev. 4/16
VLT Brochure, Rev. 6/16
VLT Brochure, Rev. 9/16
VLT Brochure, Rev. 9/17

User Manual

Helix VLT User's Manual Rev. A
Helix VLT User's Manual Rev. B
Helix VLT User's Manual Rev. B
Helix VLT User's Manual Rev. C
Helix VLT User's Manual Rev. C
Helix VLT User's Manual Rev. E
Helix VLT User's Manual Rev. F
VLT User's Manual Rev. D

Installation & Operation Manual

Helix VLT Floor Stand Kit Instructions Rev. B
Helix VLT Gas Conversion Kit Instructions Rev. B
Helix VLT IOM Rev. A
Helix VLT IOM Rev. B
Helix VLT IOM Rev. C
Helix VLT IOM Rev. F
Helix VLT IOM Rev. I
Helix VLT IOM Rev. J
Helix VLT IOM Rev. K
Helix VLT IOM Rev. L
Helix VLT IOM Rev. M
Helix VLT IOM Rev. N
Helix VLT IOM Rev. O
Helix VLT Multiple Boiler Guide Rev. C
VLT IOM Rev. 9/17
VLT IOM Rev. F
VLT IOM Rev. G
VLT, IOM, Rev. 4/16
VLT, IOM, Rev. 9/16

Parts Lists

Helix VLT Parts List Rev. H
Helix VLT Parts List Rev. I
Helix VLT Parts List Rev. J
Helix VLT Parts Rev. A
Helix VLT Parts Rev. B
Helix VLT Parts Rev. D
Helix VLT Parts Rev. E
Helix VLT Parts Rev. F
Helix VLT Parts Rev. G
VLT Parts List Rev. 3/18
VLT Parts List Rev. 9/17
VLT Parts List Rev. G
VLT Parts List Rev. J
VLT, Parts List, Rev. 4/16

Warranty

Dunkirk Consolidated Boiler Warranty Rev. D
Dunkirk Consolidated Boiler Warranty Rev. E
Helix VLT Additional Warranty Rev. C
Helix VLT Standard Manufacturer´s Warranty Rev. A

Specification/Performance

Helix VLT Spec Rev. C

Submittal

Helix VLT Submittal Rev. D

Kit Instruction

Boiler Gas Conversion Kit Instructions NG to LP Rev. D
CSD-1 Kit Installation Instructions Rev. A
Helix VLT Connection Instructions for Additional Devices Rev. A

Engineering Documents / Resources

Helix VLT Gas Conversion Instructions Rev. A
Helix VLT Multiple Boiler Sensor Guide Rev. B
Helix VLT Spec Rev. A
Helix VLT Spec Rev. B
Helix VLT Submittal Rev. B
Helix VLT Submittal Rev. C
Helix VLT Tax Certification Statement Rev. D
Helix VLT Tax Certification Statement Rev. F

Options

Helix VLT Tax Certification Statement Rev. A
Helix VLT Tax Certification Statement Rev. B
Helix VLT Tax Certification Statement Rev. E

Product Testimonials

  • Yes, expensive but appears to work well.

    Charles Fitzgerald
    Denver, CO

  • Good design. Clean unit. No wasted space in cabinet. Appreciate the "English" control panel (vs. obscure coding). Very quiet and compact.

    Unit looks to be well built. I am an engineer/operator, and appreciate the design and assembly of the unit.

    John Steiner
    Golden, CO

  • Very nice and clean installation, doesn't require much room.

    User friendly.

    Brad King
    Spokane, WA

  • Yes I would recommend this product.  Great value and easy to install.

    Antonio Pereira
    Yonkers, NY