| 165 / | HD | HEAT EXCHANGE |
| DIG 92 | DD | WITH VALVE OR MOVABLE DEFLECTOR FOR HEAT EXCHANGE FLUID FLOW {6} |
| DIG 126 | DD | .~ Total flow rate through heat exchanger controlled by valve {3} |
| DIG 129 | DD | .~.~ Valve regulates flow through housing enclosing heat exchanger {1} |
| DIG 130 | | .~.~.~ Including valve regulating flow through heat exchanger |