5.3102.28 Burners

Topic: 
Hydronic Heating (Hot Water and Steam)
Subtopic: 
Equipment Installation
Desired Outcome: 
Efficiencies safely maximized
For supporting material, see Referenced Standards.
TitleSpecification(s)Objective(s)
5.3102.28a
Assessment

Inspections will be made based on ANSI ANSI American National Standards Institute, www.ansi.org / ASHRAE ASHRAE American Society of Heating, Refrigerating and Air-Conditioning Engineers, www.ashrae.org / ACCA ACCA Air Conditioning Contractors of America, www.acca.org Standard 180 Standard Practice for Inspection and Maintenance of Commercial Building HVAC HVAC Heating, ventilation, and air conditioning Systems for commercial applications and ANSI ANSI American National Standards Institute, www.ansi.org / ACCA ACCA Air Conditioning Contractors of America, www.acca.org 4 Maintenance of Residential HVAC HVAC Heating, ventilation, and air conditioning Systems for residential applications

Examples of items to be addressed are as follows:

  • A review of site conditions and verification of efficiency performance condition of burner shall be evaluated
  • Safety issues will be addressed

Determine if boiler replacement is needed

Confirm feasibility of the scope of work

Improve safety and efficiency

5.3102.28b
Service, upgrade, or replace burner

Inspections will be made based on ANSI ANSI American National Standards Institute, www.ansi.org / ASHRAE ASHRAE American Society of Heating, Refrigerating and Air-Conditioning Engineers, www.ashrae.org / ACCA ACCA Air Conditioning Contractors of America, www.acca.org Standard 180 Standard Practice for Inspection and Maintenance of Commercial Building HVAC HVAC Heating, ventilation, and air conditioning Systems for commercial applications and ANSI ANSI American National Standards Institute, www.ansi.org / ACCA ACCA Air Conditioning Contractors of America, www.acca.org 4 Maintenance of Residential HVAC HVAC Heating, ventilation, and air conditioning Systems for residential applications

Examples of items to be addressed are as follows:

  • Combustion air intake dampers
  • Fuel/air modulating
  • Electronic ignition
  • Linkage-less fuel/air control
  • Oxygen trim
  • Variable frequency drives
  • Low nitrogen oxide (replacement burner)
  • High turndown ratio burner

If not present or in scope of work, above upgrades will be considered

Short cycling will be eliminated

Improve safety and efficiency

Identify opportunities for upgrades

5.3102.28c
Combustion efficiency

Undiluted flue gases will be checked with a calibrated flue gas analyzer in accordance with accepted protocol

If combustion is not occurring safely or with maximum efficiency, diagnostics and adjustments will be done in accordance with work order specifications

Fuel/air ratio will be adjusted to meet specified performance over a range of firing rates, when applicable

Confirm that combustion occurs safely with maximum efficiency

5.3102.28d
Modulation

Contractor will demonstrate the burner modulates over the specified operating range (steam pressure and water temperature) and firing rates

Combustion efficiency will match work order specifications over specified firing rates or turndown ratios

Engage and optimize modulation

5.3102.28e
Education

Building operations staff will be educated on burner capabilities and ongoing maintenance

Maintain optimal performance

5.3102.28f
Startup

Startup will be performed by "qualified person," as defined in NFPA NFPA National Fire Protection Association, www.nfpa.org 31, 3.3.50

Ensure proper installation and setup

5.3102.28g
Fuel

Where applicable, dual fuel systems will be recommended when replacing oil-fired burners

Dual fuel switch control operation will be confirmed

Ensure fuel flexibility