8
Commissioning and operation
Safety instructions
DANGER!
Danger of electric shock! Do not touch any live com-
ponents! Electrical equipment carries a dangerous
electrical voltage.
–
Only skilled qualified electricians are allowed to
work on the electrical system.
–
Switch off the power supply before working on
any electrical equipment.
Before initial commissioning and switching of the supply
voltage, check for proper wiring.
The green illuminated LED button signals correct wiring
after switching on the supply voltage.
When the supply voltage is switched on, the control
component performs a synchronisation and the damper
blade is moved to the OPEN position. The damper then
returns to its original position. This can take up to three
minutes; the status is shown on the display and the
Chapter 3.1 ‘Product overview’ on page 10
8.1 Factory settings:
The volume flow controller is adjusted at the factory and
set to the operating mode and operating parameters
specified in the order code. Due to the factory-set
volume flow rates, always ensure that the terminal units
are only installed in the specified locations
The factory-set operating parameters can be taken from
the adjustment sticker on the terminal unit. ( Fig. 26 /5)
Modbus (M)
Factory set operating parameters:
q
vmin
[m³/h]; [l/s] - Lower limit of the operating range for
the VAV terminal unit
q
vmax
[m³/h]; [l/s] - Upper limit of the operating range for
the VAV terminal unit
Additional commissioning steps required
8.6 ‘Configuring the Modbus interface’ on page 30
Analogue (0 – 10 V / 2 – 10 V) – variable operation
(V)
Factory set operating parameters:
q
vmin
[m³/h]; [l/s] - Lower limit of the operating range for
the VAV terminal unit
q
vmax
[m³/h]; [l/s] - Upper limit of the operating range for
the VAV terminal unit
Analogue (0 – 10 V / 2 – 10 V) – constant value mode
(F)
Factory set operating parameters:
q
vmin
[m³/h]; [l/s] - The volume flow rate constant value
q
vconst
is set in parameter q
vmin
.
q
vmax
[m³/h]; [l/s] - The parameter
q
vmax
is set to q
vnom
.
For constant value operation, no control signal may be
specified at terminal Y.
During commissioning, the settings can be adjusted on
the display of the control component or with the service
tool according to the requirements,
the control component’ on page 28
Cb2
- Modbus
CA0
- Analogue 0 – 10 V – variable operation (V) or
constant value operation (F)
CA2
- Analogue 2 – 10 V – variable operation (V) or
constant value operation (F)
Supplementary use of the Modbus interface in ana-
logue operation (hybrid operation)
In analogue operation, only the setpoint value settings
of the control component are analysed at the analogue
input. A setpoint value setting via the Modbus interface
(register 0) is not possible. Any write attempts are
acknowledged with an error response.
Regardless of the selected interface configuration, how-
ever, the other Modbus registers can be used. In ana-
logue mode with analogue setpoint value specification,
various operating values, such as the volume flow rate
actual value and damper position, can therefore be read
out from a higher-level building management system
(central BMS) via the Modbus interface, or central over-
ride controls can also be triggered.
Commissioning and operation
Factory settings:
Control component Compact XM0 • XS0 for VAV terminal unit TVE
26