When actuated, pump 15 delivers spirts or {TAIL ~ increments} of {HEAD ~ liquid}, i.e. water containing perhaps a detergent and antifreeze, from the tank or reservoir 14 to the heat exchanger 20 or 120, as the case may be 
When actuated , pump 15 delivers spirts or { TAIL ~ increments } of { HEAD ~ liquid } , i.e. water containing perhaps a detergent and antifreeze , from the tank or reservoir 14 to the heat exchanger 20 or 120 , as the case may be
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH