165 / | HD | HEAT EXCHANGE |
200 | DF | WITH TIMER, PROGRAMMER, TIME DELAY, OR CONDITION RESPONSIVE CONTROL {14} |
281 | DF | .~ Fluid pressure responsive or control {3} |
282 | .~.~ Branched flow of heat exchange material {1} | |
283 | DF | .~.~.~> Bypass of heat exchanger {1} |