Burkert Type 8660 - Manual (Page 15)

Type 8660 Control Center
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- 15 -
Cooling operation
Air which is directed into the front box area can be cooled by the cooling unit, when
the motor is running. It must be noted that only a constant cooling performance can
be achieved when the cooling unit is switched on. The amount of cooled air that is
sent into the front box area can be adjusted with the front box blower levels.
Additionally, the temperature of the air which is blown in can be variably controlled
through counter heating with the heat exchanger (corresponding operation of the set
point regulator).
When the windshield is steamed up because of high humidity, it can also be quickly
cleared by switching the cooling unit on. At the same time, a suitable level of counter
heating should be used, and the air should be directed towards the windshield, using
the left knob.
Defrosting
The setting, Defrost of the set point regulator is responsible for clearing steam and
ice from the windshield. The maximum temperature will be automatically set, the air
will be directed to the windshield, and the front box blower will be switched on - the
blower level will depend upon the current operational mode of the passenger bus
(with Ignition off: blower off; with Ignition on and motor off: blower level 1; with
Ignition on and motor on: blower level 3).