USER GUIDE
KRM-X-1 & KRM-X-2
V1.0 (07.05.2020)
1 (9)
Produal Oy
Keltakalliontie 18, 48770 Kotka FINLAND
Tel: +358 10 219 9100 / Fax: +358 5 230 9210
info@produal.fi
Information is subject to change without prior notice.
5 d
h
3 d
h
5 d
h
SENSOR CONSTRUCTION
1. Adapter plate with gasket
2. Patented measuring tube
3. End cap
4. Rubber bushing
(only for insulated or circular ducts)
5. Housing base with gasket
6. Electronics
7. Optical smoke detector
8. Housing top with gasket
9. LED red: alarm/reset button
10. LED yellow: failure
11. LED display: sensor contamination in %
12. LED green: in operation
13. LWD blue: airflow below 1 m/s
14. Opening for test gas
15. Air duct
ASSEMBLING
Device assembly, wiring and commissioning can only be carried out by qualified professionals.
Always make the wirings while the power is switched off.
Positioning of the sensor
The KRM-X must be positioned in accordance with the applicable local regulations on ventilation
systems. Reliable smoke detection must be ensured. The air collecting tube may be cut to a length of
160 mm, depending on the cross-section of the ventilation duct. It must not be cut to less than this
minimum length of 160 mm. Using the KS-X mounting bracket, this makes it possible to monitor ducts up
to <100 mm ø. There is no maximum width, height or diameter for air ventilation ducts monitored with the
600 mm long standard air collecting tube under the VdS approval/DIBt certification. The indicated airflow
direction must be observed when installing the tube adapter. The air collecting tube may be mounted
laterally, below or above the air duct – the location makes no difference.
In the ideal case, as far as is structurally possible, install the KRM-X in a location where flow meters etc.
are normally installed, so that there is a laminar airflow along the measuring tube. We recommend
mounting and installing the KRM-X at the same distance from heating, cooling and humidity devices and
in a similar way as flow sensors. The distance of the KRM-X to fittings, valves, filters, etc. should be 3
times the diagonal of the channel cross-section against the flow direction and 5 times with the flow
direction, if this is structurally possible. The KRM-X, including the air collecting tube, may not be installed
along the longitudinal edges of ventilation ducts (corner area). The KRM-X must be installed such that
the air collecting tube is constantly located in the air stream. In horizontal ventilation ducts the KRM-X,
including the air collecting tube, should be installed in the upper third of the ventilation duct or at the top
of the ventilation duct, if this is structurally possible.
Example of positioning after the
change of air duct direction
Air outlet
Example of positioning after air
outlets.
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