Coolant circuit
25
Ensure the correct direction of flow of the circulation pump to the vehicle
coolant circuit. The installation position of the circulation pump must be
chosen so that the circulation pump is self-bleeding. It must be possible for
the air volume trapped in the circulation pump to automatically escape up-
ward via the connection piece. Incorrect installation can result in malfunc-
tions of the circulation pump.
See fig. 7: Installation positions of U4847 Econ circulation pump.
7.4. Checking
After the heater and all coolant-carrying components have been installed,
the entire coolant system must be checked for leaks with the system pres-
sure specified by the vehicle manufacturer.
1317098B_EA_TT_ZEC_DE_EN_ZH.book Page 25 Tuesday, July 3, 2012 1:08 PM
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