flakt woods KSOM Quick start guide

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1. KSOM INSTALLATION
A protecting tube is installed for the electrical cable of the control exhaust valve KSOM when the
ventilation ducts are mounted. The protecting tube is brought by the side of the duct to the same
level with ceiling or wall surface (Fig. 1).
If no protecting tube is used, a cable satisfying the
requirements is installed, with which the cable attached
to the valve can be extended. In this case, a space must
be reserved for the additional cable.
The KSOM valve is delivered with a fixedly
installed 1 m cable. This requires placing the
connecting box close enough to the valve.
The control exhaust valve is installed in the duct as shown in Fig. 2:
1) Push the mounting frame (3) through the extension ring (2).
2) Pass the electrical cable of the valve through the inlet rubber gasket in the mounting frame.
The extension ring must be placed between the electrical cable and the mounting frame flange.
3) Pass the electrical cable through the protecting tube to the connection box and push the
package mounting frame / extension ring (2) & (3) to the duct (1) and fasten. When fastening
the frame to the duct with rivets, the rivet must be placed behind the thread of the frame so
that it does not hinder the rotating of the valve in place.
4) Pass the additional cable into the duct and rotate the valve into the mounting frame. When
rotating the valve, MAKE SURE THE CABLE IS NOT SQUEEZED BETWEEN THE VALVE
AND THE MOUNTING FRAME. This might cause damage to the cable.
The valve is rotated into the frame by first placing the valve hanger end between the cable
penetration and the end of the frame thread (*, Fig. 2.)
When replacing an old valve with the control exhaust valve KSOM, remove the old mounting
frame. The installation is then carried out as described above. The electrical cable can also be
mounted as a surface mounting by passing it over a groove in the extension ring (2, Fig. 2) over
the wall or ceiling surface to the connection box, e.g. covered with a cable channel.
When installing KSOM, be particularly careful with the humidity sensor inside the valve. The
sensor is a delicate component and may me damaged if handled carelessly.
The control exhaust valve is not designed to be used in the sauna room.
2. KSOM ELECTRICAL CONNECTIONS
The transformer shall be installed according to the installation standards.
Fig. 3. KSOM wiring diagrams
The supply voltage 24 VAC of the valve (rated power 12 VA / 500 mA), protection voltage
SELV shall be connected to the white and green wires of the cable delivered with the valve (Fig.
3), and the switch used for controlling to the red and black ones. If KSOM is controlled only with a
humidity sensor integrated in the valve, the control wires (red and black) are left unconnected. If
desired, an external control (switch) can be connected to KSOM. The internal humidity sensor will
still remain as the determining control. The internal sensor can be disabled by turning the switch 3
into OFF position, enabling only external control.
After connecting the supply voltage, the valve performs a reference run towards the mechanical
limit and a warm-up run (open-closed). The valve stops after this at the position determined by the
control. If the supply voltage is interrupted, the valve holds its position and performs the above
mentioned reference and warm-up runs after the supply voltage has returned.
Controlled with an external switchControlled with a humidity sensor
integrated in the valve
Fig. 1.
Protecting tube Duct
Fig. 2.
WHITE GREEN RED BLACK
MANUAL SWITCH/ MANUAL SWITCH + TIMER EXTERNAL HUMIDITY SENSOR MOTION DETECTOR
WHITE GREEN

Δ
pm
-
a
+
a
3. MEASUREMENT AND REGULATION OF AIR FLOW
The basic air change rate is adjusted by changing adjustment position a. The basic adjustment is
made by turning the screw spindle, not the cover, by hand. The adjustment position is locked by
tightening the hose clamp carefully. The desired forced exhaust position is set by choosing the
valve running distance (5, 10, 15, 20 mm). This is done with dip switches on the circuit board
according to following table. NOTE! If the adjustment is changed while the product is
receiving voltage, the new adjustment is not valid until the voltage has been cut off and
then switched on.
Factory setting of running distance 10mm.
The running distance must be chosen so that the valve in its open position does not exceed the
adjustment position + 10 mm. The air flow is determined according to the diagram below, the
pressure difference at the valve and the adjustment position (Δpmand a, Fig. 4).
MEASUREMENT AND ADJUSTMENT DIAGRAMS
The properties of the product include a warm-up run every 24 hours, which the valve
performs independently of the user.
The valve is equipped with overheating protection which stops valve operation for two
minutes due to a continuous back-and-forth run.
KSOM
Installation and connecting instructions
19.11.2009
Switch Running
distance Basic adjustment position
1 2 [mm] max. [mm]
OFF OFF 5 +5
ON OFF 10 0
OFF ON 15 -5
ON ON 20 -10
Fläkt Woods Oy
P.O.Box 6, 37801 TOIJALA, FINLAND
Tel. [phone], Fax [phone]
Ø100 Ø125
Fig. 4.