Control And Monitoring Functions; Control Functions - Bitzer CM-SW-01 Original-Gebrauchsanweisung

Characteristics of the compressor module
Enclosure class
Internal electrical fuse
Place of installation
EMC
Voltage supply of the peripheral devices
The compressor module internally supplies voltage to
peripheral devices (solenoid valves, slider position in-
dicator, oil monitoring, monitoring of oil stop valve and/
or oil heater) and to the terminal strips CN7 to CN12.
Phase monitoring fuse F24
The HS. and CS. compressors incorporating the com-
pressor module are equipped with the F24 fuse in the
terminal box. It protects the phase monitoring lines
between terminal box and module housing. Such a fuse
is also required with open compressors between mod-
ule housing and motor terminal box when the phase
monitoring function of the compressor module is used.
Technical data of the installed fuse:
• Rated current 1 A
• Release speed FF (very quick acting)
• Rated breaking capacity of 50 kA at 700 V AC
• Dimensions 6.3 x 32 mm
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Module housing in its state of delivery: IP65
Compressor module without module housing: IP00
Terminal strips CN4 to CN6
This fuse protects the CM-SW-01 if a short-circuit occurs in one of the connec-
ted solenoid valves or in the oil heater of the CS.105.
An alarm message is output in the BEST SOFTWARE or via Modbus.
Permitted ambient temperature: -30°C .. +70°C
Permitted relative humidity: 5% .. 95% (EN60721-3-3 Classes 3K3 and 3C3)
Maximum allowable altitude: 2000 m
The compressor module complies with the EU EMC directive 2014/30/EU
Interference immunity
EN61000-6-1:2007, Immunity for residential, commercial and light-industrial
environments
EN61000-6-2:2005, Immunity for industrial environments
Emitted interference
EN61000-6-3:2007 +A1:2011, emission standard for residential, commercial
and light-industrial environments

4 Control and monitoring functions

4.1 Control functions

The CM-SW-01 compressor module automatically con-
trols the capacity and the adjustment of the internal
volume ratio (V ).
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Capacity control
The module continuously adjusts the compressor capa-
city according to the set point of the superior controller.
With the HS.95, CS.105 and OS.95 compressors, this
is done by switching both solenoid valves CR+ and CR-
of the capacity control slider or, with all other com-
pressor models, by switching the 4 capacity regulators.
Adjustment of the internal volume ratio (V
The module automatically sets the most suitable V
each case. To this end, it evaluates the slider position
and the current operating conditions by means of integ-
rated algorithms.
Unloaded compressor start
When the compressor is switched off, the compressor
module positions the capacity control slider in a way to
ensure an unloaded start of the compressor.
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ST-150-3