Question: how to find lrv and urv?
Answer: If we assume the “H” port connects to the upper nozzle, the LRV will be +41.4 ”WC. If we assume the “H” port of this DP transmitter connects to the lower nozzle, the URV will be +2.9 ”WC. If we assume the “H” port of this DP transmitter connects to the upper nozzle, the URV will be -2.9 ”WC.