You are currently on the SWS 2017 legacy website. To view the current 2020 SWS website, please visit https://sws.nrel.gov.

The SWS 2017 website will be taken down in September 2022. You can access an archive of 2017 specifications from the 2020 SWS website under News & Updates.

5.3003.2 Combustion Analysis of Oil-Fired Appliances

Topic:

Forced Air

Subtopic:

System Assessment and Maintenance

Desired Outcome:

Analysis on critical components and operations completed in accordance with industry and manufacturer specifications to ensure equipment operates as designed, safely, efficiently and is durable.

Note:

The authority having jurisdiction may require that a licensed professional perform certain tasks outlined in this detailIf new installation or replacement is necessary, ANSI / ACCA 5 QI HVAC Quality Installation Specification will be followed

For supporting material, see Calculation of the Infiltration Credit, Referenced Standards and Building America Solution Center.

Single-Family Homes Manufactured Housing

Title	Specification(s)	Objective(s)
5.3003.2a Oil system: filter	Filter will be present, clean, and leak free	Ensure oil filter is present and functional
5.3003.2b Nozzle	Nozzle size, angle, and spray pattern will be correct for design input and within equipment firing rate of the heating system manufacturer. Position of nozzle and electrodes will be in accordance with manufacturer specifications	Ensure equipment is outfitted with the correct nozzle per manufacturer guidelines
5.3003.2c Fuel pressure	Measurement will be verified in accordance with manufacturer specifications	Ensure correct oil pump pressure for nozzle installed and at OEM’s specified values per ACCA ACCA Air Conditioning Contractors of America, www.acca.org
5.3003.2d Place appliance in operation	Heating equipment will be placed in operation in accordance with applicable standards and manufacturer specifications when available	Prepare equipment for combustion analysis tests
5.3003.2e Smoke Test	Smoke test will be conducted before any combustion testing is completed Smoke spot reading will be in accordance with burner manufacturer specifications If smoke test is more than actionable levels, specify a clean and tune	Determine whether equipment is operating within acceptable range according to smoke test and call for action if needed
5.3003.2f Steady state efficiency ( SSE SSE Steady state efficiency )	Measurement will be verified in accordance with manufacturer specifications	Determine whether steady state efficiency is within manufacturer range
5.3003.2g Net stack temperature	Net stack temperature will be measured and verified in accordance with manufacturer specifications	Determine whether net stack temperature is within manufacturer’s recommended range
5.3003.2h Carbon dioxide (CO2) and oxygen (O2)	Measurement will be verified in accordance with manufacturer specifications	Verify combustion performance of equipment is within manufacturer recommended range based on CO2 and O2 readings
5.3003.2i Excess combustion air	Excess combustion air will be calculated and shown to be in accordance with manufacturer specifications	Verify combustion performance of equipment is within manufacturer recommended range based on excess combustion air readings
5.3003.2j CO CO Carbon monoxide in flue gas	Measure CO CO Carbon monoxide and recommend actions to ensure that CO in the undiluted flue gas will be less than 400 ppm air-free	Ensure CO CO Carbon monoxide in undiluted flue gas is less than 400 ppm air-free
5.3003.2k Testing/inspection holes	All testing and inspection holes will be sealed with approved materials	Ensure equipment: Operates as designed Operates safely Operates efficiently Is durable

Title	Specification(s)	Objective(s)
5.3003.2a Oil system: filter	Filter will be present, clean, and leak free	Ensure oil filter is present and functional
5.3003.2b Nozzle	Nozzle size, angle, and spray pattern will be correct for design input and within equipment firing rate of the heating system manufacturer. Position of nozzle and electrodes will be in accordance with manufacturer specifications	Ensure equipment is outfitted with the correct nozzle per manufacturer guidelines
5.3003.2c Fuel pressure	Measurement will be verified in accordance with manufacturer specifications	Ensure correct oil pump pressure for nozzle installed and at OEM’s specified values per ACCA ACCA Air Conditioning Contractors of America, www.acca.org
5.3003.2d Place appliance in operation	Heating equipment will be placed in operation in accordance with applicable standards and manufacturer specifications when available	Prepare equipment for combustion analysis tests
5.3003.2e Smoke Test	Smoke test will be conducted before any combustion testing is completed Smoke spot reading will be in accordance with burner manufacturer specifications If smoke test is more than actionable levels, specify a clean and tune	Determine whether equipment is operating within acceptable range according to smoke test and call for action if needed
5.3003.2f Steady state efficiency ( SSE SSE Steady state efficiency )	Measurement will be verified in accordance with manufacturer specifications	Determine whether steady state efficiency is within manufacturer range
5.3003.2g Net stack temperature	Net stack temperature will be measured and verified in accordance with manufacturer specifications	Determine whether net stack temperature is within manufacturer’s recommended range
5.3003.2h Carbon dioxide (CO2) and oxygen (O2)	Measurement will be verified in accordance with manufacturer specifications	Verify combustion performance of equipment is within manufacturer recommended range based on CO2 and O2 readings
5.3003.2i Excess combustion air	Excess combustion air will be calculated and shown to be in accordance with manufacturer specifications	Verify combustion performance of equipment is within manufacturer recommended range based on excess combustion air readings
5.3003.2j CO CO Carbon monoxide in flue gas	Measure CO CO Carbon monoxide and recommend actions to ensure that CO in the undiluted flue gas will be less than 400 ppm air-free	Ensure CO CO Carbon monoxide in undiluted flue gas is less than 400 ppm air-free
5.3003.2k Testing/inspection holes	All testing and inspection holes will be sealed with approved materials	Ensure equipment: Operates as designed Operates safely Operates efficiently Is durable