a condition indicator operatively connected to said ionization switch and said power supply for indicating {HEAD ~ the operation} of {TAIL ~ said valve assembly} 
of
a condition indicator operatively connected to said ionization switch and said power supply for indicating { HEAD ~ the operation } of { TAIL ~ said valve assembly }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL