3) Coolant Circulating Route
4) Connecting the Coolant Circuit
The heater is connected to the coolant circuit in the coolant feed pipe from the vehicle engine to
the heat exchanger.
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Parts conveying coolant must be routed and fastened in such a way that they pose no
temperature risk to person or material sensitive to temperature from radiation and direct
contact.
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Before working on the coolant circuit, disconnect the negative battery cable and wait until
all components have cooled down completely.
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When installing the heater and the water pump, note the direction of flow of the coolant
circuit.
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Fill the heater and water hoses with coolant before connecting to the coolant circuit.
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When routing the coolant pipes, observe a sufficient clearance to hot vehicle parts.
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Protect all coolant hoses/coolant pipes from chafing and from extreme temperatures.
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Secure all hose connections with hose clips.
03-9
6910-03
FFH SYSTEM
REXTON 2006.09