9. Cooling water system1689.5.5 Function of the coolant recoverytankThe pressure valve opens to discharge steam when thesteam pressure in the fresh water tank exceeds 90 kPa(0.9 kgf/cm 2 ).This consumes water. The coolant recovery tankmaintains the water level by preventing this dischargeof water.The steam discharged into the coolant recovery tankcondenses into watch, and the water level in the tankrises.When the pressure in the fresh water system dropsbelow the normal value, the water in the coolantrecovery tank is sucked back into the fresh water tankto raise the water back to its original level.The coolant recovery tank facilitates long hours ofoperation without water replacement and eliminates thepossibility of burns when the steam is ejected from thefiller neck because the pressure cap does not need tobe removed.9.5.6 Specifications of coolant recovery tank9.5.7 Mounting the coolant recovery tank(1) The coolant recovery tank is mounted at approximately the same height as the heatexchanger (fresh water tank).(allowable difference in height : 300 mm (11.8110 in.) or less)(2) The overflow pipe should be less than 1000mm (39.3701 in) long, and mounted so that itdoes not sag or bend.NOTE : Make sure that the overflow pipe of the coolantrecovery tank is not submerged in bilge. If theoverflow pipe is submerged in bilge, water inthe bilge will be siphoned into the fresh watertank when the wafer is being cooled.9.5.8 Precautions on usage of the coolant recovery tank(1) Check the coolant recovery tank when the engine is cool and refill with fresh water asnecessary to bring the water level between the low and full marks.(2) Check the overflow pipe and replace if bent or cracked. Clean out the pipe if it isclogged up.Capacity ofcoolant recovery tankOverall capacity 1.3 LFull-scale position 0.8 LLow-scale position 0.2 LFiller cap20.5130mmFULLLOWCoolant recovery tank6125703560653012098Overflow tubeSub tankMounting plate
