NATE Hydronics Gas Service case studies
NATE Hydronics Gas Service · Put your knowledge to work in context.
The NATE Hydronics Gas Service certification is a specialty credential for technicians who service gas-fired hydronic heating equipment - boilers, burners, and the water-side systems they feed. It signals that a technician can work safely and competently across the whole appliance: the heat load the system must satisfy, the gas train and burner, combustion and venting, gas piping and leak testing, controls and safety devices, circulators and distribution piping, startup and combustion analysis, and fault diagnosis. The NATE Hydronics Gas Service case studies are 5 cases and about 3,017 words.
1Sizing a Replacement Boiler With Connected Radiation and Indirect Domestic Hot Water
An inspector is called to a 1920s two-story house in a 6,000 heating-degree-day climate. The owners are replacing a 150,000 Btu/h input, 80% AFUE atmospheric boiler with a 120,000 Btu/h input, 95% AFUE condensing boiler.
619 words, about 3 min2Added Boiler Gas Branch Size and a Questionable Pressure Test
A gas fitter is adding a 140,000 Btu/h input natural gas boiler to a house. The meter outlet pressure is 7 in w.c.
651 words, about 3 min3Condensing Boiler Lockouts From Vent Recirculation Under a Deck
A newly installed 100,000 Btu/h input condensing boiler fires and runs for 8 to 12 minutes, then locks out on flame failure on cold, windy days. The boiler is direct-vented with 2-inch PVC.
608 words, about 3 min4Spill Switch Trips After Basement Depressurization
An atmospheric cast-iron boiler in a basement serves baseboard radiation. After a basement remodel tightened the house, added a bath fan and a clothes dryer, the boiler's manual-reset spill switch trips after 10 to 15 minutes of operation.
554 words, about 3 min5Cold Second Floor After Gravity-to-Forced Circulation Conversion
A 2,800 sq ft two-story house has a converted gravity hot-water system. Original 1¼-inch mains and ¾-inch branches feed cast-iron radiators.
585 words, about 3 min