Practical advice
Bleeding the coolant circuit for the heating system
Note:
The filling program is divided into 3
stages. You can switch to the next
program stage using rocker switch (12).
An LED on the right-hand section of the
control panel goes out as each program
stage is completed. There is a forced
pause of 10 seconds between each
stage. The pause lasts 6 minutes in stage
2. It is not possible to switch to the
next stage until the forced pauses have
elapsed (LED in rocker switch (12) starts
to flash). From program stage 2 onwards,
the engine must be running, otherwise it
is impossible for the program to proceed.
In program stages 2 and 3, set an
elevated idling speed (approximately 750
rpm) using the retarder lever (refer to the
retarder lever operating instructions).
Note:
The coolant level in the engine coolant
expansion tank must be checked, and
topped up if necessary, during and after
each program stage.
M20.00-0144-71
Program stage 1 (LEDs in buttons 6,
7, 8, 11 light up, engine off): Add
coolant through opening (2) until the
expansion tank is completely filled
with coolant. Press rocker switch
(12) on the control panel - the LED in
button (6) goes out.
Note:
Use clean water – well filtered and as
soft as possible (drinking water quality) –
mixed with corrosion inhibitor/antifreeze
(comply with the Specifications for Ser-
vice Products).
Danger.
If no corrosion inhibitor/antifreeze is
available, pure water may be used tem-
porarily (drinking quality). The bus must
be driven to the nearest OMNIplus Ser-
vice Partner to have corrosion inhibitor/
antifreeze added to the coolant in the
specified ratio (refer to the “Practical ad-
vice” section). Automatic heating/ventil-
ation/air-conditioning mode must be dis-
abled at the HVAC control panel (LED in
the A/C button not lit) to prevent the air-
conditioning system from being switched
on (refer to the “Heating/ventilation/air-
conditioning” section for notes on opera-
tion).
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TRAVEGO / TRAVEGO M / TRAVEGO L (Euro VI)/07.2014 GB
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