Thermo Top C / Thermo Top E Connection to the vehicle cooling system
37
7 Connection to the vehicle cooling system
The heaters are connected to the vehicle cooling system as shown in
Figs. 3, 4 and 5. At least 4 litres of coolant must be circulated
(Thermo Top C); 3 litres for Thermo Top E.
The heater must be integrated into the cooling circuit in the feed line to
the on-board heat exchanger.
NOTE:
Leaking cooling water must be collected in a suitable container.
The water hoses supplied by Webasto must always be used. If other
hoses are used, they must at least comply with DIN 73411. The hoses
must be routed without kinking
and preferably uphill to ensure perfect
bleeding. Hose connections must be supported by hose clips so they
cannot slip off.
NOTE:
The hose clips on the heater must be fitted between the flared neck and
the heater.
The hose clips must be tightened with a torque of 2.0 + 0.5 Nm.
Care must be taken to bleed the cooling system before the heater is
taken into service for the first time or after refilling with fresh cooling
water. Heater and lines should be installed in such a way as to ensure
static bleeding.
Malfunctions due to overheating may occur during operation if the
heater and lines have not been bled correctly.
Fig. 4: Installation in engine water circulation,
"in-line integration"
ϑ
1 Equalizing reservoir
2 Thermostat
3 Engine
4 Circulation pump
5Heater
6 Heat exchanger
7Radiator
7
2
3
1
6
4
5
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