HVAC Excellence Master HP case studies
HVAC Excellence Master HP · Put your knowledge to work in context.
The Master Specialist Certifications are part of the certification ladder offered by HVAC Excellence, an ESCO Institute program that describes itself as developing standards and resources that strengthen education, training, credentialing, and workforce development across the HVACR and building science industries. HVAC Excellence presents its certifications as portable and stackable, meaning a candidate can pursue progressive levels of certification at each stage of a career - student, technician, contractor, or instructor. The HVAC Excellence Master HP case studies are 5 cases and about 3,170 words.
1R-410A Retrofit With Existing Line Set and High-Static Ductwork
An installer is replacing a failed 3-ton R-22 split heat pump with a 3-ton R-410A unit in a 1,900 ft² house. The existing line set is 3/8 in.
698 words, about 3 min2Cold-Climate Heat Pump With Excessive Auxiliary Heat
A 2,000 ft² house has a 3-ton variable-speed heat pump with a 10 kW electric auxiliary heater. The thermostat is configured with an auxiliary heat lockout at 40°F outdoor and a compressor lockout at 0°F.
645 words, about 3 min3Recovery Cylinder Capacity and Occupied-Space Leak Repair
A technician responds to a 5-ton R-410A rooftop heat pump with a nameplate factory charge of 14 lb. The unit is in a commercial building and has a confirmed leak at a flare connection in the ceiling plenum.
563 words, about 3 min4Heat Pump Not Defrosting With Coil Sensor Fault
A 3-ton residential heat pump with a demand defrost control is icing the outdoor coil in 35°F, 90% RH weather. The outdoor fan runs continuously in heating, and the coil is nearly blocked after 45 minutes.
613 words, about 3 min5Dual-Fuel Heat Pump and Furnace Running Together
A homeowner has a 3-ton heat pump paired with an 80% AFUE gas furnace in a dual-fuel installation. The thermostat is a programmable model with terminals Y1, Y2, W1, W2, G, R, C, and O/B.
651 words, about 3 min