Trox TVZ, Инструкции по установке и вводу в эксплуатацию

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6.1.4 Default settings q
vmin
and q
vmax
Default settings of the air terminal units with Easy con-
troller:

q
vmin
: 40%

q
vmax
: 80%
During commissioning, the settings can be adjusted
according to the requirements.
6.1.5 Setting constant volume flow control
The setpoint value for a constant volume flow rate is set
on the q
vmin
potentiometer.
The position of the q
vmax
potentiometer should be set to
0%.
For the constant volume flow control, no control signal is
required at terminal w.
6.1.6 Setting variable volume flow control
In the case of a variable volume flow control, the vari-
able volume flow rate operating range is set via the
potentiometers q
vmin
and q
vmax
, which is controlled via
the control signal at terminal w.
The following points must be observed for the control
input signal:

Usable control range of the VAV terminal unit
Ä
Chapter 6.1.1 ‘Control ranges of VAV terminal
units’ on page 22

q
vmin
= nominal volume flow rate at control signal (w)
with 0 V DC (not less than 10 or 20%)

q
vmax
= set volume flow rate at control signal (w) with
10 V DC
The operating range can be restricted to achieve a
higher resolution of the assignment of 0–10 V voltage
signals to the volume flow rate setpoint values.
If the value for q
vmin
is set higher than q
vmax
, the setting
of q
vmin
is interpreted as a fixed setpoint value. The set-
point signal (w) is ignored in this case.
6.1.6.1 Setting the entire control range for the
control input signal of the central building
management system
If the volume flow rate is to be specified by the central
BMS over the entire control range, set the q
vmin
potenti-
ometer to 0% and the q
vmax
potentiometer to 100%.
The following points must be observed for the control
input signal:

Usable control range of the VAV terminal unit
Ä Chapter 6.1.1 ‘Control ranges of VAV terminal
units’ on page 22
The usable control range is available from a 1 V DC
or 2 V DC control signal, depending on the VAV ter-
minal unit type.

If the control signal drops below 0.5 V DC, the
damper blade moves to the shut-off position.
Compliance with a control signal
≤ 0.5 V DC is not
always given due to interference voltages on the
supply lines. Therefore, the positive circuit should
always be preferred for a safe shut-off Ä ‘Override
control on/off’ on page 20 .
Commissioning and operation
Setting of the control component > Setting variable volume flow control
Easy control component for VAV terminal units 24