All features of the R7184A1075 plus a 15 second valve-on delay (postpurge).
R7184P1064*
All features of the R7184B1032 plus a burner motor-off delay (postpurge): 1/2, 2, 4, or 8 minutes.
R7184P1072*
All features of the R7184P1064 plus a dry alarm contact terminals (30VAC, 2A max.). Prepurge and postpurge can be field disabled together by a DIP switch setting.