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Commercial Solid Fuel Fired Boiler Systems

REGULATORY REQUIREMENTS FOR INSTALLATION OF ALL EXISTING AND FUTURE SOLID FUEL FIRED BOILER SYSTEMS IN THE NWT FOR COMMERCIAL APPLICATIONS.

Requirements for all commercial solid fuel fired boiler installations in the NWT are as follows:

  • For all proposed projects, a complete design package shall be stamped by a registered Professional Engineer of the NWT
  • A complete design package shall be submitted to the Office of The Fire Marshal for review and approval prior to commencement of work on site
  • Boiler/Electrical installation permits must be in place prior to commencement of work on site

The following regulatory requirements apply to all installation:

  • System boiler(s) shall be certified by a certified body, accredited by the Standards Council of Canada as meeting the requirements of CAN/CSA B-366. 1-M91 (Reaffirmed 2007) "Solid-Fuel-Fired Central Heating Appliances". This shall include provisions for a pressure relief valve(s) to act as a boiler failure safety device to protect boiler from overpressure.
  • Installation shall conform with the requirements of CAN/CSA B-365-01 (Reaffirmed 2006) and specifically include the following as required by the Office of the Fire Marshal:
    • All system designs shall incorporate a provable, demonstratable automatic method to disperse excess heat within the boiler(s) in the event of a power shutdown or pump stoppage to protect boiler(s) from possible overheating when operating in excess of maximum pressure and temperature. Methods may vary dependant on specific site applications and conditions.
    • All systems shall incorporate a fixed manual reset control device to shutdown the boiler(s) and stop the feed auger(s) should the system water temperature exceed the maximum allowable certified operating temperature of the boiler(s) (210°F)
      • All systems shall be provided with a single point of disconnect for all power within the boiler housing, regardless of voltage. Location shall be clearly labelled for Fire Fighter information.
      • All systems shall also be provided with a clearly labelled emergency boiler shut off device located at main entry door to boiler housing.
      • All system control devices to be clearly labelled as to function.
      • All wiring to meet the requirements of latest edition of Canadian Electrical Code Part 1.

      These requirements replace requirements called for in CAN/CSA B-366. 1-M91 clause 6.2.3.

    The following regulatory requirements apply to installations where boiler(s) are installed separated from served buildings in a seacan or other structure:

    • The Location of boiler housing(s) and the pellet storage container shall maintain clearances to building, property lines and any other fuel source equipment to meet the requirements of either CSA B139 "Installation Code for Oil-Burning Equipment" latest adopted edition, CSA B149.1 "Natural Gas and Propane Installation Code" latest adopted edition, and/or CSA B149.2 "Storage and Handling of Propane"
    • Location of boiler housing(s) and pellet storage container to comply with all NWT utility companies clearance regulations.
      • As of October 11th, 2010 any wood pellet boiler destined for the Northwest Territories shall be in a manufactured container (No Sea Cans)  with no combustible surfaces  or installed in a fabricated building on site and with regards to either method the requirements of the CSA B-51-09 Boiler , Pressure Vessel , and Pressure Piping Code and the CSA B365 – 10 Installation code for Solid – Fuel – Burning Appliances and Equipment shall be met.
      • Provide a method of protection against thermal shocking of system.

      The following regulatory requirements apply to installations where boiler(s) are installed within mechanical rooms also housing alternate fuel heating plant:

      • Location of boiler(s) and pellet storage container to maintain clearances to alternate fuel source equipment to meet the requirements of either CSA B139 "Installation Code for Oil-Burning Equipment" latest adopted edition, CSA B149.1 "Natural Gas and Propane Installation Code" latest adopted edition, and/or CSA B149.2 "Storage and Handling of Propane".

      All installations to be inspected and approved by:

      • The Design Engineer of record, who shall provide a letter of verification for the entire installation.
      • GNWT Fire Marshal's Office
      • Mechanical/Electrical Inspection Section of Public Works and Services

      All Existing installations shall be retrofitted to meet these requirements

       

      Issue Date: June 16, 2008

      Revised Date: August 2011