HVAC Excellence Oil Heat Certification case studies
HVAC Excellence Oil Heat · Put your knowledge to work in context.
HVAC Excellence is the credentialing and standards arm of ESCO Group, based in Mt. Prospect, Illinois, and it describes its mission as developing standards and resources that strengthen the quality of education, training, credentialing, and workforce development across the HVACR and building science industries. Within that framework, HVAC Excellence offers portable and stackable certifications: students, technicians, contractors, and instructors can pursue progressive levels of certification at every stage of their careers, and HVAC Excellence offers exams at each of these levels. An oil heat credential sits in that family as a specialty area covering oil-fired heating systems - burners, nozzles, fuel oil delivery and storage, combustion analysis, draft, controls, and service procedures - and is typically pursued by technicians who install or service oil furnaces and boilers, and by students in programs that use the HVAC Excellence competency and task list as a curriculum framework. The HVAC Excellence Oil Heat case studies are 5 cases and about 2,207 words.
1Delayed Ignition and Puffback After Nozzle and Electrode Replacement
A service technician replaces the nozzle and electrodes on a Beckett AFG burner firing a cast-iron boiler. The nameplate specifies 0.75 GPH at 100 psig, 80°B pattern.
465 words, about 2 min2Marginal Cad Cell Resistance Causing Intermittent Lockout
A homeowner reports that a Beckett AFG oil burner locks out intermittently, usually after the boiler has run for 10–15 minutes. The burner restarts after pressing reset, then may run for days.
439 words, about 2 min3One-Pipe Oil Line With Below-Burner Tank and High Vacuum
An oil-fired furnace in a detached garage is fed from a 275-gallon tank in the basement. The tank outlet is 6 ft below the burner, and a single 3/8-in.
443 words, about 2 min4High CO2 With Smoke and High Stack Temperature After Cleaning
After cleaning the flue passages of a 25-year-old cast-iron oil boiler, a technician tunes a 1.25 GPH 80°B nozzle at 140 psig. Final readings are: CO2 13.8%, O2 2.4%, smoke 1, gross flue temperature 720°F, ambient 70°F, draft −0.05 in.
384 words, about 2 min5Tankless Coil Cannot Keep Up With a Shower Demand
A homeowner with a 1.0 GPH oil-fired boiler and an internal tankless coil complains that hot water lasts only about 5 minutes in the shower. The boiler aquastat is a Honeywell L8124 set to LO 160°F and HI 180°F, with a 10°F differential.
476 words, about 2 min