DataSheet OPTIM201910 en GB

2 / 24 | Variable Air Volume Controllers
Controls
The residential VAV system is equipped with BLC4 type compact controllers in the master/slave connection.
The controllers use analog input for the setpoint signal and analog output for the feedback signal. The type of the
signals is DC 0 V ... 10 V. The VAV controllers are factory calibrated as standard to the air volume indicated in the table
below or, upon request, they can be adjusted to site required settings of the V
min
/V
max
range. The air volumes can
also be readjusted on site with the ZTH-EU
hand held service tool. If specic air volumes for V
min
and V
max
would be
required, they must be indicated in the ordering code or noted in the order for adequate calibration in the factory.
Factory Settings
Size V
min
@ 2 m/s V
max
@ 9 m/s V
nom
@ 11 m/s
(mm) (m
3
/h) (l/s) (m
3
/h) (l/s) (m
3
/h) (l/s)
100 57 16 254 71 311 86
125 88 24 398 111 486 135
160 145 40 651 181 796 221
Basic Functional Characteristics
Controller type: OPTIMA-RES-A-…BLC4
Basic Parameters and Features
Flow volume adjustment setpoint signal:
Analog input DC 0 V … 10 V. The Systemair MZ3-Touch room control device is primarily foreseen to be connected
to the analog input. It can operate in automatic mode, continuously controlling the air ow volume dependent from
temperature, VOC or CO
2
concentration. If switched to manual mode, the air ow setpoint can be adjusted manually in
four discrete steps between the preset V
min
and V
max
of OPTIMA-RES-A.
Other control devices with 0 V ... 10 V control output can also be used, e.g. Systemair RC-C3DOC.
Controller parameters setup tools: Belimo ZTH-EU
Feedback signal (actual air ow volume): Analog output DC 0 V … 10 V
Power supply (each VAV controller, secured by transformer on board):
AC 24 V/50 Hz DC 24 V
4 VA 2 W
Power supply (whole system): AC 230 V/50 Hz
Protection class (closed system box): IP40
Master/Slave Conguration
The VAV system is congured as master/slave. The supply air VAV controller (the master) reads the ow volume
setpoint from an external source like e.g. a room controller or manual setpoint dial. The control range (V
min
, V
max
) of
the master VAV controller can be adjusted at the factory or on site with the ZTH-EU conguration tool. The feedback
signal from master VAV represents the actual measured air ow volume. This signal is connected to the extract air
VAV controller (the slave) as the setpoint for the air ow volume. So the air ow volumes of supply and extract air are
always equal with high reliability.