ECKELMANN VS 3015 CT, Инструкция по эксплуатации, Страница: 38 / 219

Firmware V1.41 V1 08.11.2022 38/219
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5.4.4.5 Setpoint Shift via Humidity Sensor
It can be set using the humid. adapt. parameter (menus 3-2-3 and 3-2-4) whether the t
0
setpoint should also be
adjusted depending on the air humidity. The signal for air humidity can be accepted either from the humidity
sensor or via the CAN bus from another pack controller (see chapter
Ambient Data for Setpoint Switching ).
Depending on the air humidity, a temperature offset, t
0 offset
is then formed that is added to t
0_Soll
:
5.4.5 Base Load Rotation
The operating time of each compressor is monitored internally. In order to achieve even operating time of the
compressors, the compressor with the longest operating time is disabled and the compressor with the shortest
operating time is enabled after expiry of a configurable cycle time.
For capacity-controlled compressors, base load rotation only occurs when the base load stage of an additional
compressor is available. During base load rotation, the compressor with the longest operating time is disabled
and the compressor with the shortest operating time is loaded. For base load rotation with capacity-controlled
compressors, the switching state of the capacity stage(s) is also adopted for the new compressor. Compressors
disabled due to load shedding are taken into account for the base load rotation. The number of running
compressor stages is not changed during the base load rotation. The base load rotation is only active under the
following conditions:
If all configurable compressors are enabled, base load rotation is only performed in the case of increasing
pressure within the neutral zone.
If compressors have been disabled due to load shedding, base load rotation is only performed in the case of
increasing pressure.
The base load rotation can be adjusted using the Cyl. temp. parameter (menu 3-7). Particularly for screw
compressors that have an oil return system that does not require any base load rotation, the value "–" can be
assigned to the parameter and thus the base load rotation is deactivated.
5.4.5.1 Base Load Rotation for Speed Controlled Compressors
For systems with speed-controlled compressors, a speed controller can be assigned to the first two
compressors (C1 and C2). Further fixed-speed compressors (C3..Cn) can also be controlled. The base load
rotation of the fixed-speed compressors (C3..Cn) is performed according to the procedure described in chapter
Base Load Rotation . Compressors (C1 and C2) that can be assigned to the speed controller are alternately
If a demand-dependent setpoint shift (menu 3-2-1-2) has been selected, this parameter is not active /
visible.
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The setpoint for taking account of the air humidity can be set separately for the day and night
operation.
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