OPTIMIX Compact controller 309VM
OPTIMIX Compact controller 309VM
Fläkt Woods’ 309VM is a compact controller designed to be used in supply air diffusors especially in variable air volume
(VAV) systems. 309VM combines a dynamic differential pressure sensor for pressure-independent controls and user
interface with 3-digit display which enables monitoring the real-time measured values and setting up values without
external equipment.
309VM comes with two alternative control functions. It can be used either to provide constant throw length at varying
air flow rates (OPTIMIX L02) or to control the flow rate (OPTIMIX VAV). Note that OPTIMIX L02 is only available with
an analogue actuator.
OPTIMIX L02 is a function for keeping the desired throw length unchanged at varying flow rates. The desired throw
length can be easily set directly on the actuator and is kept constant over the operating range regardless of variation in
the air flow rate. The actuator provides a real-time throw length display. Diffusion directions are easy to adjust.
The operation is based on a vertically adjustable regulation plate that is automatically controlled by an actuator. The air
slot is made bigger or smaller as required to keep the throw length constant at varying air flow rates. When the flow rate
increases, the slot is made bigger to decrease the velocity at which air is discharged from the diffusor. When the flow rate
decreases, the slot is made smaller to increase the discharge velocity.
OPTIMIX VAV is a function for controlling the air volume. It can be used to provide either varying or constant flow
rates. The operation is based on a vertically adjustable regulation plate that is automatically controlled by an actuator.
The throw length varies according to the flow rate.
The operating range is set a standard value 0-10V and operating mode is L02 on delivery. To change these settings, see
quick reference guide section of this document.
The controller can also be force controlled via closing contacts (timer, presence detector, etc.).
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Specifications are subject of alteration without further notice.
OPTIMIX Compact controller 309VM
Connection diagram
User interface
Actuators are provided with color coded and numbered
wires.
On the cover of the device there are two selectors, value
selector (1) and function selector (2).
1
2
3
4
BU
BN
BK
GY
Y/
Z
U/
PP
AC 24V
DC 24V
Also there is the 3-digit display (3) to show selected
function, values and units.
BU = Blue (1)
BN = Brown (2)
BK = Black (3)
GY = Gray (4)
0-10V
0-10V
BU-BN
operating voltage
BU-BK
control signal
BU-GY
feedback signal
Load for output GY
24 VAC/VDC
0...10 V / 2...10 V
0...10 V / 2...10 V
max. 0,5 mA
*) Differential pressure sensor
Observe polarity on secondary of transformers. All
common and signal (–) must be connected in line.
Incorrect polarity can cause controller damage or
operation error. Provide overload protection for line
voltage and disconnect as required. Consider voltage
drops when connecting multiply actuators in parallel.
See “STRA Room controller Installation and
maintenance”-manual for detailed instructions how to
connect the actuator to Fläkt Woods’ room controller.
When using 3rd party controllers, notice that a separate
transformer should be used for the controller if the
controller power is full-wave rectified.
When the actuator is powered up, the actuator starts
automatically an adaption drive to get correct gap. Text
“ref” is shown in the display during the adaption drive.
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Specifications are subject of alteration without further notice.
OPTIMIX Compact controller 309VM
Setting the values, quick reference
guide
4-way mode
When the device is connected to a power supply, settings
can be made. A screwdriver is needed when adjusting
values with the selectors.
3-way mode
OPTIMIX L02-mode
2-way mode
1. Setting up the mode:
Turn the function selector until it points to “Mode”.
Current mode is shown in the display. Using value
selector set 0-A for 0-10V range or 2-A for 2-10V range to
the display. After the selection the new setting is saved
and display flashes for indication that the new setting is
stored. When L02 mode is selected, dot on display will be
lower-right corner:
0-10V, L02-mode
1-way mode
4. Slave mode (optional)
When there are more than one Optimix in L02 mode after
a flow damper, one Optimix must be master and others
must be set to a slave mode.
Set up master as above.
Setting up the slave mode: Turn function selector to mode
and find 0-C or 2-C using value selector. The range must
match the master device.
2-10V, L02-mode
2. Throw length setup:
Constant Throw length setup: Turn function selector to
L02max and set a value to 0.5 m using the value selector.
Then turn the function selector to L02min and set desired
throw length using the value selector.
Controlled Throw length setup: Set L02 max to desired
maximum throw length and L02 min to desired minimum
throw length. The throw length is controlled with 0 -10V
or 2-10V control signal Y.
3. Diffusion pattern setup
Diffusion pattern can be adjusted with strips. Strip kit
for setting the diffusion pattern is separately ordered
accessory.
Note that diffusion pattern of the master and the slaves
should be the same or else the throw length of the slave is
not exactly correct.
OPTIMIX VAV-mode
1. Setting up the mode:
Turn the function selector until it points to “Mode”.
Current mode is shown in the display. Using value
selector set 0-n for 0-10V range or 2-n for 2-10V range to
the display. After the selection the new setting is saved
and display flashes for indication that the new setting is
stored. When VAV mode is selected, dot on display will
be upper-right corner:
0-10V, VAV-mode
2-10V, VAV-mode
2. Vmax value setup:
Turn the function selector until it points to “Vmax/L02
max”. Then turn the value selector until desired air
flow is shown on display. After the selection the display
flashes for indication that new Vmax setting is stored. The
actuator keeps Vmax flow when the control signal is 10V
and air flow is sufficient.
The actuator automatically compensates effect of the
strips when diffusion pattern mode is set.
To set diffusion pattern mode, turn the function selector
to Vnom/L02nom and find correct mode using value
selector.
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3. Vmin value setup:
Turn the function selector until it points to “V min/
L02 min”. Then turn the value selector until desired air
flow is shown on display. After the selection the display
flashes for indication that new Vmin setting is stored. The
actuator keeps Vmin flow when the control signal is 0V
(2V) and air flow is sufficient.
Specifications are subject of alteration without further notice.
OPTIMIX Compact controller 309VM
Functions, detailed description
Test
1. Value selector
The value selector allows the
changing of values. The position of
the arrow shows the value set. The
changes are displayed as soon as
the selector is moved ±10° from its
position.
By turning the selector up or down
the corresponding values are
shown.
2. Function Selector
The function selector allows
choosing the function depending
on its position. If there is no
function selected the display will
show three dashes(- - -).
Opens the diagnose menu. All outside input signals on Y
are neglected and the controller only operates according
to the selected override function. All override functions
are disabled after a time-out of 10 hours.
The display toggles after the selection of the function
between the actual value (8s showing time) and the
function (2s showing time). OFF-mode toggles with Ysignal showing input voltage multiplied by 10. Selecting
another function will disable the Test function and set it
automatically to OFF.
Turning the value selector allows Test function selection.
The appropriate symbols on display are toggled as
indicator.
oP(en)
opens the damper
Flow/L02
Shows the actual flow in l/s, L02 throw length in m or gap
in mm.
cL(ose)
closes the damper
The display starts flashing if the servomotor hits an end
before matching a setpoint.
Hi(gh)
forces the actuator to Vmax/
L02max
An overflow (measuring pressure difference higher than
250 Pa) is indicated in the display by a small circle, see
section Display.
Lo(w)
forces the actuator to Vmin/
L02min
Dot on lower-right corner
of the display: L02 mode is
selected and unit is meters.
on
Test mode is switched on.
The actuator stays in the
current position.
oFF
Test mode is switched
off. The actuator starts
controlling according to
external signal Y.
Ad(a)P(tation drive)
Adaptation drive is
switched on. The actuator
finds its mechanical limits.
Adaption drive is not
normally needed to set
manually. Note that if
adaption drive is started,
the drive must not be
stopped before finishing.
123
Showing the software
version V123. After 3s
showing the display shows
oFF again.
Dot on upper-right corner
of the display: VAV mode
is selected and the unit is l/
s.
No dot on display: Slave
mode is selected and the
unit is mm.
Vmin/L02min
Allows to set the desired minimum flow or minimum
L02 throw length for the external reference signal Y = 0V
or Y = 2V. Selected value is shown on display in l/s or m
depending on mode.
Vbtw/L02btw
Allows to set the desired between flow or between L02
throw length for the external override signal (negative
rectified half wave from 24VAC supply). Selected value is
shown on display in l/s or m depending on mode.
Vmax/L02max
Allows to set the desired maximum flow or maximum
L02 throw length for the external reference signal Y = 10V.
Selected value is shown on display in l/s or m depending
on mode.
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Mode
Allows setting the operating mode and the input signal
range (0…10V or 2…10V) by turning the value selector.
The feedback signal range of U corresponds to Y.
Specifications are subject of alteration without further notice.
OPTIMIX Compact controller 309VM
0-n ... VAV mode and 0-10V
range
Analogue signals
OPTIMIX L02-mode
2-n ... VAV mode and 2-10V
range
Input signals
0-A ... Constant throw
length mode and 0-10V
range
In mode 0…10VDC the input signal Y [V] matches to the
following throw length [m]:
2-A ... Constant throw
length mode and 2-10V
range
The input signal Y allows controlling the actuator
according to the selected mode of operation.
and the throw length matches to
Y = 0VDC as L02min and 10VDC as L02max
0-C ... Slave mode and
0-10V range
2-C ... Slave mode and
2-10V range
In mode 2…10VDC the input signal Y [V] matches to the
following throw length [m]:
Adr
Not in use in analogue actuator.
and the throw length matches to
Vnom/L02nom
Shows factory set nominal flow in VAV mode and slave
mode. The value cannot be changed by user.
Y = 2VDC as L02min and 10VDC as L02max
Shows selected diffusion patter setup in L02 mode
Output signals
In mode 0…10 VDC the output signal U [V] matches to
the following gap [mm]:
and to calculated actual gap Sact [mm] from feedback
signal U [V]:
In mode 2…10 VDC the output signal U [V] matches to
the following gap
and to calculated actual gap Sact [mm] from feedback
signal
OPTIMIX VAV-mode
Input signals
The input signal Y allows to control the VAV actuator
according to the selected mode of operation.
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Specifications are subject of alteration without further notice.
OPTIMIX Compact controller 309VM
In mode 0…10VDC the input signal Y matches to the
following flows:
150 [l/s]
.
Vmax
Air volume flow
.
and the flows match to
Y = 0VDC as Vmin and Y = 10VDC as Vmax
Vref =
.
.
.
Y
(Vmax – Vmin) + Vmin
10
.
Vref =
.
Vmin
0
In mode 2…10VDC the input signal Y matches to the
following flows:
0
.
.
Y–2 .
(Vmax – Vmin) + Vmin
8
Reference signal Y
2
10VDC
Figure 1: Fig. 1. Reference signal Y
150
.
Air volume flow
Y = 2VDC as Vmin and Y = 10VDC as Vmax
Mode 2…10VDC includes special feature to close damper
with input signal Y = 0VDC.
Output signals
Mode 0 ... 10 VDC
U
10
.
Vact = 150 x
U–2
8
Mode 2 ... 10 VDC
.
Vmin
(Apparat)
0
See also Fig 1. “Reference Signal Y”
Vact = 150 x
Control range
(100%)
and the flows match to
0
2
Actual air volume flow U
10VDC
Figure 2: Fig. 2. Actual air volume flow U
In mode 0…10VDC the output signal U matches to the
following flows:
and to calculate the actual flow Vact from the feedback
signal U:
In mode 2…10VDC the output signal U matches to the
following flows:
And to calculate the actual flow Vact from the feedback
signal U:
See also Fig 2. “Actual air volume flow U”
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Specifications are subject of alteration without further notice.
OPTIMIX Compact controller 309VM
Forced control, both modes
Display
The controller can be force controlled to following
positions via closing contacts (see fig. 3):
The display (3) uses 7-segment numbers in full 3-digits.
Additional signs include a small circle, three square dots
and two rectangular slashes.
(Close) Y= connected to ground conductor of 24 VAC
supply (only with mode 2-10 VDC)
(Vmin/L02min) Y= disconnected
(Vbtw/L02btw) Y= neg. rectified half wave from 24VAC
supply
(Vmax/L02max) Y= full wave from 24VAC supply
(Open) Y= pos. rectified half wave from 24VAC supply
The square dots are used with the externally printed text
to visualize certain functions or units (l/s, m). It is meant
to denote the unit of the value shown in the display. In
the shown case it could be l/s, m or activated Test (Test
function).
An overflow (differential pressure above 250 Pa) is
indicated in the display by a small circle at the first digit.
If the controller tries to match reference and actual value
this is shown as flashing dot of the chosen unit.
If the controller cannot meet reference and actual value
and therefore hits an end stop the complete display starts
flashing to indicate this problem.
The rectangular slashes are used to define the decimal
separator. See following examples:
L02 mode
Throw length 1m
Figure 3: Fig. 3. Forced control alternatives
Throw length 1.5m
VAV mode
Flow 1 l/s
Flow 10 l/s
Flow 100 l/s
Slave mode
Gap 2mm
Gap 10.3mm
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Specifications are subject of alteration without further notice.
OPTIMIX Compact controller 309VM
Technical data
Power supply
Over voltage
Power consumption
Input signal
Input impedance
Feedback signal
Permissible ambient
- working temperature
- storage temperature
- humidity
Wiring, OPTIMIX L02-mode
24 VAC/VDC ± 20%, 50/60 Hz
Up to 40 VDC, max. 5 sec.
3.5 VA
Proportional to [Vmin/L02min ...
Vmax/L02max ]
0 - 10 / 2 - 10 VDC, or
0 - 20 / 4 - 20 mA
with 500 Ω resistor and
override controls
>50 kΩ
0 - 10 / 2 - 10 VDC
proportional to air volume flow or
gap
0 °C to 50 °C (32 °F to 122 °F)
-20 °C to 80 °C (-4 °F to 176 °F)
5-95% RH, non-condensing
A single diffusor in a room/zone
Multiple diffusors in a room/zone
The maximum number of the 309VM slave actuators is 10
pieces.
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Specifications are subject of alteration without further notice.
OPTIMIX Compact controller 309VM
Wiring, OPTIMIX VAV-mode
Parallel control of two flow variators
Master-Slave control of two flow variators
NOTE!
Vmin must be set to 0.
Vmax must be set to 150.
+
BU BN BK GY
1
2
3
-
∆p
M
BU BN BK GY
1
4
2
3
4
0...10/2...10V DC
24V AC/DC
+~
CAV Constant air volume
NOTE! Vmax must be set to 0.
The controller will have Vmin as setpoint.
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Specifications are subject of alteration without further notice.
OPTIMIX Compact controller 309VM
Optimix in demand-controlled
ventilation systems
OPTIMIX L02-mode
Choose OPTIMIX L02 when you like to have a good and
draught free indoor climate. OPTIMIX L02 controls air
pattern with variable air flow and makes it possible to
have a lot of cooling effect. When the VAV system has
a large variance in air flow or supply air temperature is
much smaller than the temperature of the room the risk of
the draught is avoided by using the OPTIMIX L02.
Central extract air example
The room contains an active Optimix air terminal device
to provide a constant throw length and a transfer air
terminal device for extract air.
An EMSS flow variator is installed in the supply air duct
of each room to control and measure the supply air flow.
A supply air demand is controlled by the STRA-04 room
contoller based on occupancy, CO2 and/or temperature.
The supply air demand is sent from STRA-04 to the
supply EMSS flow variator.
An EMSF flowmeter is installed at the start of the zone's
supply air duct which measures the total amount of
supply air to the zone. This value is then sent to an EMSS
flow variator to control the extract air in order to balance
the ventilation in the zone.
Master - Slave example
The room contains active Optimix air terminal devices to
provide a constant throw length.
An EMSS flow variator is installed in the supply air duct
of each room to control and measure the supply air flow.
A supply air demand is controlled by the STRA-04 room
contoller based on occupancy, CO2 and/or temperature.
The supply air demand is sent from STRA-04 to the
supply EMSS flow variator.
Extract air is controlled as Balanced room example or
Central extract air example.
Balanced room example
The room contains an active Optimix air terminal device
to provide a constant throw length and an exhaust air
device or valve for extract air.
An EMSS flow variator is installed in the supply air duct
of each room to control and measure the supply air flow.
A supply air demand is controlled by the STRA-04 room
contoller based on occupancy, CO2 and/or temperature.
The supply air demand is sent from STRA-04 to the
supply EMSS flow variator.
The flow value from the supply EMSS flow variator is
then sent to an EMSS flow variator installed in the room's
extract air duct to control the extract air flow in order to
balance the ventilation in the room.
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OPTIMIX VAV-mode
Choose OPTIMIX VAV when there is a need for a smaller
air flow variance and temperature difference. See sound
level or capacity limitations for Optimix VAV in Optimix
Technical catalogue.
Note that in Optimix VAV mode the throw length varies
according to the flow rate.
Central extract air example
The room contains an active Optimix air terminal device
for regulating the supply air flow and a transfer air
terminal device for extract air.
Specifications are subject of alteration without further notice.
OPTIMIX Compact controller 309VM
A supply air demand is controlled by the STRA-04 room
contoller based on occupancy, CO2 and/or temperature.
The supply air demand is sent from STRA-04 to the
Optimix.
An EMPA pressure controller is installed at the start of
the zone's supply air duct in order to maintain the static
pressure, and an EMSF measuring device is installed to
measure the total supply air to the zone. The value from
the EMSF is sent to an EMSS flow variator to control the
extract air in order to balance the ventilation in the zone.
The minimum recommended pressure for EMPA is 30 Pa.
Balanced room example
The room contains an active Optimix air terminal device
for regulating the supply air flow and exhaust air device
or valve for extract air.
A supply air demand is controlled by the STRA-04 room
contoller based on occupancy, CO2 and/or temperature.
The supply air demand is sent from STRA-04 to the
Optimix.
The Optimix measured value is sent to an EMSS flow
variator installed in the room's extract air duct to control
the extract air flow in order to balance the ventilation in
the room.
An EMPA pressure controller is installed at the start of
the zone's supply air duct in order to maintain the static
pressure. The minimum recomended pressure for EMPA
is 30 Pa.
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Specifications are subject of alteration without further notice.