STRA-04 Room controller. Installation and maintenance manual.
STRA-04 for Optivent
Fläkt Woods
8
Specifications are subject of alteration without further notice.
CO
2
control (P control)
Fläkt Woods STRZ-18-1 is an active CO
2
sensor
(0-10V)and is activated in room controller by setting
parameter 81 to 5. When the controller exceeds the CO
2
value (parameter 112 FS =500 ppm), it starts controlling
against a fully open damper (UO3). The damper opens
fully at Parameter 113 (FS=1000 ppm). Heating/Cooling
(PI) in controlled concurrently with the CO
2
control.
If heating is required, the heating signal increases on
heating output UO1.
Window contact
When the window contact has been configured, the
regulator is set to normal operation when the window is
closed. When the window is open, the controller goes into
Off mode, the heating and cooler outputs are set to 0 V
and the frost protection function is activated.
Frost protection
STRA-04 has built-in frost protection, which is activated
when the controller is not in use. The frost protection
prevents the temperature from dropping below 8°C. The
fan speed and controls automatically return to normal
when the frost protection is deactivated.
Control the light with an occupancy sensor
It’s possible to control the operation of the light with
an occupancy sensor through a relay and its socket
(STRZ-73-b). The light will switch off when the room
is unoccupied. The socket for wiring is screwless quick
connection.
Parameter 60 should be changed to 1 when using this
function.
Wiring diagram
Parameter settings
STRA-04 is delivered with a number of factory settings.
To achieve the desired function, the controller must
be adapted to its application. This is done via the
parameter menu in the display. The applications can vary
dramatically, and incorrectly set parameters can impair
the controller's and application's function. For this reason,
make sure you set the parameters that are critical to your
particular application. If in doubt, contact Fläkt Woods
TSS Controls.
Parameter menu
In STRA-04, various parameter values can be set in a
parameter menu. This parameter menu is accessed by
simultaneously pressing the INCREASE and DECREASE
buttons for about 5 seconds until the Service indication
lights up in the display. After this, press the INCREASE
button twice.
Initially, the parameter menu will only show a parameter
number (P01, P02, P03 etc.). You can scroll between the
parameters by pressing the INCREASE and DECREASE
buttons. When the right parameter has been selected,
press the Function button. The parameter value will be
shown and the parameter number will disappear.
The parameter value can now be changed with the
INCREASE and DECREASE buttons. When the
INCREASE and DECREASE buttons are held pressed
down, the value in the display will start scrolling, first
slowly and then with increasing speed, in about 3-4 steps
with roughly 2-3 seconds between the steps.
Confirm/Reject
To confirm the changed parameter, press the Function
button again. The display will return to showing the
parameter number. Before confirming the change, you can
retrieve the original value (the value that was displayed
before you made the change) by simultaneously pressing
the INCREASE and DECREASE buttons. The original
value will be shown on the display.
Return
After about 1 minute, or when the INCREASE and
DECREASE buttons are pressed simultaneously while
you are in the menu, the display will return to normal.
The word Exit will appear in the display after the last
parameter. By pressing the Function button when Exit
appears, you can exit the parameter menu. If you press
INCREASE, you reach the first parameter. If you press
DECREASE, you reach the last parameter.
8790 GB 2016.03
8790 GB 2016.03
