VLV55|VLV65 - Volumetric flow controller
TECHNICAL DOCUMENTATION
Controller selection | Technical data of control components
Construction subject to change
No return possible
Version: 2017-04-24 | Page 17
CONTROLLER SELECTION
Type Size
Controller
Product
LMV-D3-MP
NW100 - 315
Compact
Belimo
LMV-D3-MF
NW100 - 315
Compact
Belimo
227VM-024-05
NW100 - 315
Compact
Gruner
Other controllers available on request. Make Belimo,
Gruner, Sauter, Siemens and Delta Controls possible.
TECHNICAL DATA OF CONTROL COMPONENTS
Measured value collection and control function
The volumetric flow controllers of the Belimo make, type LMV-
D3-MP/-MF Compact and the Gruner make, type 227VM Com-
pact are delivered by SCHAKO as standard with the operating
mode (Y signal, U5 signal) 2-10 V DC. When activated by 2 V DC,
the V
min
volume is controlled, the smallest possible V
min
volume
that can be controlled can be seen from the "Volumetric Flow
Range" tables.
NOTE: When the air volume drops below the V
min
shown in the
table, the correct functioning of the volumetric flow controller
is no longer guaranteed!
Positive control damper "CLOSED"
Airtight sealing to DIN EN 1751 is achieved on site either via a
positive control "CLOSED" by means of a switch or a relay, or
via an actuator signal of 0 V DC applied to the input Y (all Com-
pact controllers equipped with the operating mode 2-10V DC).
Accordingly, the drive will likewise close the flap in operating
range 2 - 10 V DC (however, this does not apply to the operat-
ing range 0-10 V DC), and the VAV control will be inactive. To
do so, it must be ensured that the actuator signal is < 0.1 V DC.
This is why in rooms where defined pressures are active (e.g. la-
boratories), the damper should be closed via a digital on site
switching contact.
If the Compact controllers of the Belimo make must be deliv-
ered with the operating mode 0-10V DC on customer request,
please note that a positive control "CLOSED" can only be ef-
fected via a switching contact with diode.
If the compact controllers of the Belimo make are used to-
gether with the type VRP-VFP-300 in the master/slave mode or
in parallel mode, then only the 2-10 V DC operating mode is
usually possible.
Positive control damper "OPEN"
Supports smoke extraction or is used as a safety position. The
volumetric flow controller is in this case inactive, and the
damper is driven to the mechanical open position.
V
min
control to a minimum volumetric flow
Depending on requirement or by not assigning them, individual
areas can be set to stand-by operation. In this way, minimum
room flushing with greatly reduced energy expenditure is
achieved.
V
max
control to a maximum volumetric flow
Individual or several rooms are supplied for a short period with
a maximum volumetric flow. This allows, for example, a room
through-ventilation or efficient heating to be effected.
Continuous operation
As a function of the continuous driving signal and the pro-
grammed operating range (0-10 V DC or 2-10 V DC), the volu-
metric flow controller will regulate the volumetric flow linearly
between the setpoint values V
min
...V
max
.
Constant operation
If terminal 3 (Y driving signal) has not been assigned, the air vol-
ume set on the V
min
potentiometer will be set to a constant vol-
ume.
Two-stage volumetric flow rate control
Stage 1:
If terminal 3 (Y command signal) has not been
assigned, the air volume set on the V
min
potenti-
ometer will be set to a constant volume.
Stage 2:
If AC 24 V is applied to terminal 3 (Compact con-
troller) or terminal 7 (VRD3-SO, VRP-VFP-300),
the VSR will keep the value set on the V
max
po-
tentiometer constant. With a switch or a contact
in a connection line a "secondary volume flow
control" is possible.
