DataSheet OPTIMA LV R201905

Variable Air Volume Controllers | 3 / 24
Description
OPTIMA-LV-R (RI) is a Variable Air ow Volume (VAV) contoller installed in circular ducts for demand oriented
ventilation. It can operate in large air velocity range and it is especially intended for precise ow control at low air
ow velocities down to 0,2 m/s. It is pressure independent in range of 2 Pa to 600 Pa. The electronic controllers
can operate for air supply or air extract. Individual control operation or Master/Slave combination of multiple
controllers is possible.
Highlights
• Extends the range of VAV controllers in low air ow velocity part – down to 0,2 m/s
• Adaptive measurement probe for high efcient dynamic pressure readings on whole velocity range
• Advanced algorithm for appropriate control at subliminal duct static pressure
• Operable at ∆p range 2 Pa … 600 Pa
• Unprecedented control ratio V
max
/V
min
= 30/1 (0,2 m/s … 6 m/s)
• Lowest possible cross section restriction for given pressure - /ow parameters >> low pressure loss, low noise
• No straight duct in front or behind the VAV controller required. Installation immediately behind or
in front of
elbow or tee duct piece is possible.
• Accuracy: app. 5% deation from measured value *
• Leakage class 4C
• Full set of operation and override functions (Open, Close, V
min
, V
max
)
• On-board Bus communication port available
NOTE: * The air ow controller OPTIMA-LV-R (RI) utilizes a special control algorithm to protect the actuator from mechanical damage in low velocity ow.
100
0 62
0
v (m/s)
±Δ (%)
50
4
0,6
Diagram 1: ±Δ (%) deviation from measured value of air ow
velocity in the duct v (m/s)
∆p (Pa) Dynamic pressure on ow measurement probe
V
min
Minimum limit of the air ow control range
V
max
Maximum limit of the air ow control range
±Δ (%) Deviation from measured value
v (m/s) Air ow velocity in the duct
Legend