Belimo VRP-M - Page 11

VRP-M VAV
Adaptive VAV controller
www.belimo.eu Product information S4-VRP-M VAV • en • v2.0 • 11.2006 • Subject to changes 11 / 28
Functions
(Continued)
Note

mid
is not available with DC 24 V supply.
100%
30 40 50 60 70 80 90
0
100
10
20
30
50
60
70
80
90
43%
40
VAV override operation
CLOSED / 
min
/ 
mid
/ 
max
/ OPEN
If necessary, the VAV 
min
... 
max
range can be overridden by fixed operating steps in VAV ap-
plications.
The following operating steps are available:
– Shut-off operation – damper CLOSED: The damper is moved into the CLOSED position in a
defined manner.
– Operating steps 
min
/ 
mid
/ 
max
: The VRP-M adjusts the volumetric flow to the fixed selected
value.
–
Flushing operation – damper OPEN: The damper can be opened for maximum ventilation, in
which case air volume control is deactivated.
Note
– 
min
: All inputs (3 / 6 / 7) open.
– 
mid
is not available with DC 24 V supply.
8
6
2
4
30
40
100%
30 40 50 60 70 80 90
0
100
10
20
50
60
70
80
90
41%
10
0
10
2
4
6
8
Priorities for reference value input 3 (w)
and control inputs 6 (z1) / 7 (z2)
If several signals appear simultaneously, they are processed acc. to the following priorities:
Terminal Priority Function
6 z1 1 OPEN
7 z2 2 CLOSED / 
min
/ 
mid
/ 
max
3 w 3 
min
… 
max
Reference signal w
[V]
CAV operating mode
OPEN
(depending on supply pressure)

nom

max

mid

min
CLOSED
[
min
]
Volumetric flow [% 
nom
]
[
max
]
Volumetric flow [% 
nom
]
[
max
]
ZU
OPEN

nom

max

mid
[
min
]
Constant operation
Variable operation
Constant operation

min
Volumetric flow actual value signal U5 [V]
Example: 2 ... 10 V mode