Cooling System - Diamond Aircraft DA42 Airplane Flight Manual

DA42AFM
Airplane Description
~Diamond
AIRCRAFT
7.9.6 COOLING SYSTEM
Each engine is liquid cooled. The liquid cooling system consists of a radiator and a bypass
to this radiator. The bypass is in operation wh en coolant temperatures are low. lt therefore
allows the engine to warm-up quickly. Upon reaching a certain temperature (approximately
88
oc
or 190 °F) the radiator is activated by a thermostat valve. Additionally a coolant
to air heat exchanger is provided for the cabin heat system . The flow through the heat
exchanger is independent of the coolant temperature. An expansion tank helps to adjust
the pressure in the system. The system is protected against over pressure by means of
a pressure relief valve.
heatexchanger
bypass line
expansion tank
Doc. No. 7.01 .05-E Rev. 8
thermostatic valve
15-Dec-2017
cabin heater
engine drain
pressure rel ief cap
Page 7-49