Copeland 998-5100-39 Valve Kit THPU32HP7Y What is the difference between

What is the difference between P291-0774 and P291-0773

this sensor ensures precise flame rectification by detecting the presence of a pilot or main burner flame and sending a microamp signal back to the integrated furnace control

For optimal performance and to maintain calibration accuracy

Does the H15AR-3 include a pilot adjustment screw

and HE360B variants

Copeland 998-5100-39 Valve Kit THPU32HP7Y What is the difference betweenThe Copeland 998 5100 39 is a professional grade Suction and Discharge Rotalock Valve Kit engineered for high capacity refrigeration and air conditioning compressors. This kit features a 1 5 8" Sweat (ODF) suction connection with a 2 1 4 12 UNC Rotalock thread and a 1 1 8" Sweat (ODF) discharge connection with a 1 3 4 12 UNC thread. As a critical compressor service valve set, it allows technicians to isolate the compressor from the rest of the system