CIAT AeroCONNECT 1B - 4 Board Functions: Description; Control Selection

EN
EN - 7 EN7510364-00
4 - BOARD FUNCTIONS: DESCRIPTION
4.1 Control selection
There are 4 types of control are possible depending on the value of parameter A07.
● On/Off: In-series control by activation of fan stages.
● Variable speed control: Fan speed control by EC motor.
● Mixed 1: Variable speed control on one stage then activation of the other On/Off stages depending on the speed of the EC fan
● Mixed 2: Variable speed control on one stage then activation of the other On/Off stages when the EC fan is at 100%
● Mixed 3: Variable speed control on one stage then activation of the other On/Off stages depending on the temperature and the
temporization
4.1.1 On/Off control (stages)
This control is used to control the fan stages, its configuration is "IN SERIES".
Control can be for condensation pressure or temperature.
Each circuit has a control loop and can have different control setpoints but the number of stages is the same.
There are 2 types of On/Off control:
2
3
4
5
6
A152 :
A154 :
A156 :
A158 :
A160 :
A159 :
A157 :
A155 :
A151 :
A153 :
1
A150 :
EXAMPLE FOR CIRCUIT 1
A121 or A122
Setpoint
Measurement
Stage no.2
Stage no.3
Stage no.4
Stage no.5
Stage no.6
Stage 6 hysteresis
Stage 5 hysteresis
Stage 4 hysteresis
Stage 3 hysteresis
Stage 2 hysteresis
Stage 1 hysteresis
● For drycoolers from V07
The diagram below illustrates the operating principle:
- When the fluid temperature (measured) is
between A121-A106 and A121+A106, the fan
stages are not active.
- When the fluid temperature < A121-A106 and the
temperature continues to drop for a duration < A108
the control system will shut off a control stage.
- When the fluid temperature > A121+A106 and
the temperature continues to rise for a duration >
A107 the control system will activate an additional
control stage.
● For the condensers + drycooler before
V07 on the board
- The fan stages are engaged
according to the stage hysteresis
and stage ∆.
- Each control loop has its own stage
hysteresis and its own stage ∆
CONTROL STAGE
A107
A108
A121
-
A106
A121
+
A106
A121 ou
A122
Stage no.7
Stage no.3
Stage no.2
Stage no.1
Temp
outside
range
Temp
outside
range
Measurement
Setpoint
A121 or
A122
CONTROL STAGE