Reference Manual

Unit Description, RBS 2106 Climate Unit
The test button on the front panel activates the test function. After the
test has been completed, the indicators will present the status during
two minutes. No alarm is sent if there is a malfunction.
It is possible to change the behaviour of the climate unit by sending a
set of parameters to the CCU through the EPC-bus.
The following parameters can be changed:
•
Temperature range for linear speed control of internal fan
• Temperature range for linear speed control of external fan
•
Temperature range for compressor on and off
• Temperature range for heater on and off
•
Minimum operating time for compressor
DC/DC Converter
The DC/DC converter operates on the +24 V DC from the RBS. The
converter feeds -48 V DC to the internal air circuit fan, the external air
circuit fan in the heat exchanger and the CCU.
AC/DC Converter
The AC/DC converter converts AC mains to -48 V DC for the internal
air circuit fan, the external air circuit fan in the heat exchanger and the
CCU, when +24 V DC supply is not present.
Transformer
The transformer has windings for mains input voltages of 200, 208,
230, 240 and 250 V AC. The mains voltage is selected with the Voltage
Selector Switch.
The transformer supplies fans, heater, compressor and AC/DC converter
with 230 V AC independent of the mains input voltage.
20.1.3 External Interfaces
The Combined climate unit has the following external interfaces:
•
DC power
• AC mains power
• EPC bus (on CCU)
• Test and general signals (25-pole D-sub on CCU)
EN/LZT 720 0008 P2A
2001-11-28
219 (485)
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