Untitled - HUBER

unistat control V3.8.1
5. “Redu slave” is activated and the cable is connected – the “master” unit has an
active POKO: the slave thermoregulates with the preset parameters.
The operation modes “Redu slave” and “Redu Master” are alternately displayed on the
second line of the units display. The operation mode POKO master/POKO slave is set in
programme 29 (Redundancy Modes). The “Redu Slave” starts to thermoregulate when the
POKO of the “Redu Master” becomes inactive.
This is the case when:
1. The “Redu Master” is unpowered.
2. The “Redu Master” is not ready yet after starting the equipment.
3. The “Redu Master” goes to error
Behaviour of the “Redu Slave” after activation: Once activated the “Redu slave” can only be
deactivated manually via the keyboard. The mode “Redu Slave” has to be terminated through
programme 29. The thermoregulation continues but can be terminated with the off key.
Effect on the float switch: the same socket is used for both tasks. For this reason, the float
switch is automatically cut off if the “Redu Slave” mode is activated. If the “Redu Slave”
mode is deactivated and the equipment starts with the connected “Redu cable”, an error
message “level error” will be displayed.
Please note: using a second equipment to enhance the security of the installation is a
complex process. The above mentioned functionality is helpful but never the less; it will not
reach the target by itself. For example investigation of the behaviour of the fluid circuit and if
the need of swing-type check valves or the set point on which the slave has to operate and
which procedure will ensure that the slave is really going to be active in an emergency etc…;
still has to be done.
Important note: Please regularly make sure of the correct function of the redundancy
operation before every thermoregulation process.
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