P20.00-0337-76
Diagram of coolant circuit model 210 with engine 112
1 2-stage coolant system cap
2 Coolant expansion reservoir with silicagel container
3 Radiator
4 Coolant thermostat (position when engine at operating temperature)
5 Coolant pump
6 Oil-water heat exchanger at oil filter
7 Vent pipe to coolant expansion reservoir
8 Heating system heat exchanger
A31 Heating system delivery unit
A31y2 Left duovalve
A31y2 Right duovalve
A Coolant return flow
B Coolant feed
C Bypass mode temperature < 87 °C
D Mixed mode temperature > 87 °C and < 102 °C thermostat opens, start of flow through radiator
E Cooling mode temperature > 102 °C thermostat open, full flow through radiator
M Engine
S Windshield washer fluid reservoir, coolant heated