CIAT AQUACIAT POWER LD 1100R, Инструкция по эксплуатации

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12.2.6 - Operation of two units in Master/Slave
assembly
The customer must connect both units with a communication
bus using a 0.75 mm² twisted, shielded cable (contact the
manufacturer's Service for the installation).
All the parameters required for the Master/Slave function must be
configured using the Service configuration menu.
All remote controls of the master/slave assembly (start/stop,
setpoint, load shedding, etc.) are managed by the unit configured
as the Master and must only be applied to the Master unit.
Units supplied with hydraulic module
Master/Slave operation is possible only when the units are installed
in parallel:
- The Master/Slave assembly is controlled on the water inlet
without any additional sensors (system return) (Example 1).
- This can also be done on the water outlet with the addition of
two additional sensors on the common pipe (see Example 2).
Each unit controls its own water pump.
Units supplied without hydraulic module
In the case of units installed in parallel, and if there is only one
common pump installed by the installer, isolating valves must be
installed on each unit. These should be controlled (opened and
closed) using the control for the relevant unit (valves for each unit
can be controlled using the water pump control outputs). Refer to
the control manual for the connections.
In this case, a variable-speed pump must be controlled by the unit
via the 0-10 V dedicated output of the Master unit (control on
Delta T° only).
An installation in series is only possible with a fixed-speed pump
(See Example 3):
- The operation of the pump will be controlled by the Master unit.
- The Master/Slave assembly is controlled on the water outlet
without additional sensor.
- The installation must be carried out only by following the
diagram provided in Example 3.
Both of the units must be equipped with an option to
allow Master/Slave operation.
If one or both units is equipped with the variable-
speed pump option, it is strongly recommended not
to set the control mode on the pressure differential.
It is recommended to configure the temperature
differential mode with the same setpoint.
Example 1: operation in parallel - control on
water inlet for a hydraulic module
1
2
Example 2: operation in parallel - control on
water outlet for a hydraulic module
1 2
T
T
12 - OPTIONS
AQUACIAT
POWER
™ LD/ILD EN-68