USER GUIDE
KRM-1 & KRM-2
V2.0 (05.11.2015)
1 (8)
Produal Oy
Keltakalliontie 18, 48770 Kotka FINLAND
Tel: +358-10-219 9100 / Fax: +358-5-230 9210
www.produal.com
Information is subject to change without prior notice.
5 d
h
3 d
h
5 d
h
SENSOR CONSTRUCTION
A. Electronics.
B.
Upper casing with seal.
C.
Lower housing with seal
D.
Adapter plate with gasket.
E.
Optical smoke sensor.
F.
Rubber bushing (only for insulated or circular ducts).
G. Air flow in a duct
H.
Measuring tube (max. length 3 m).
I. End
cap
ASSEMBLY
Device assembly, wiring and commissioning can only be carried out by qualified professionals. Always
make the connections while the power is switched off.
Positioning of the sensor
The KRM is to be positioned in accordance with the current local state regulations on ventilation systems. Reliable
smoke detection must be guaranteed. Depending on the cross section of the ventilation duct the air collecting tube
may be cut to a length of 160 mm. This minimum length of 160 mm must not be undercut. This way, up to <100 mm ø
can be monitored in conjunction with the FP-KRM fitting plate. In the ideal case, install the KRM when structurally
possible, where flow meters, etc. are normally attached, so there is a laminar airflow along the measuring tube.
The KRM is to be installed so that the air collecting tube is constantly in the air stream. In horizontal ventilation ducts
the KRM including air collecting tube should be installed in the upper third of the ventilation ducts or at the top of the
ventilation ducts, if this is structurally possible.
Example of positioning after the
change of air duct direction
Air outlet
Example of positioning after air
outlets.
Where there are large temperature differences, outdoors for example, or in places that are dependent on outside
temperature (roof, attic), the air duct smoke sensor has to be insulated.
D
C
A
E
G
F
H
I
B
