KRM-X-1-DZ 0.6

Oppermann KRM-1-DZ 0.6
230 V AC with DIBt approval, for controlling fire/smoke dampers

incl. sampling tube LKR 0.6 m (also optionally available with sampling tube 1.5 m or 3.0 m)

Technical Data

Detector type: Scattered light RM 3.3 (ALK-E)
Power supply: 230 V AC ± 10 %, 50/60 Hz
Rated current: 30 mA
Relay outputs: potential-free
Alarm relay latched:
1 changeover contact, 8 A, 250 V AC 1 NC contact, 8 A, 250 V AC or 24 V DC
Contamination relay: 1 NC contact, 6 A, 250 V AC or 24 V DC
System fault relay: 1 NC contact, 6 A, 250 V AC or 24 V DC
Airflow relay: 1 NC contact, 6 A, 250 V AC or 24 V DC
Operating temperature: -20 °C - +50 °C
Permissible flow: 1 - 20 m/s
Permissible humidity: 10 - 95 % non-condensing
Protection class: IP 54, with WDG IP 65
Approvals/tests: DIBt approval Z-78.6-200, VdS recognition G210059, FprEN5427
LED Display: Contamination level %, flashes > 70 %
LED in housing:
green = operation
blue = missing airflow
yellow = fault, electronics, smoke detector defective
red = smoke alarm, incl. contamination > 99 %, flashes when attempting to unlock if the detector chamber is not yet empty
Adapter housing: ABS
Air measuring tube:
Aluminum/Plastic
Shortest length 160 mm
Standard length 600 mm
Dimensions: 257 x 166 x 77 mm (L x W x H)
Connection fitting: 3 x M16

Function

The KRM-DZ duct smoke detector was developed for smoke detection in ventilation ducts. It represents a combination of a smoke detector with an adapter system, whose measuring tube and housing have been specially adapted for optimal airflow through the smoke detector.

The air duct sampling tube transports the air within the air duct over the entire length of the tube via the detector chamber back into the air duct. Upon detection of smoke, the detector reacts immediately and triggers an alarm. Over time, the detector becomes contaminated. Due to the alarm threshold tracking, the sensitivity remains the same until total contamination. From 70 % contamination, the detector signals contamination. If the detector is not replaced, a smoke alarm occurs from 99 % contamination. The contamination level is signaled on a two-line LED display, which flashes at > 70 %.

To monitor functionality, the device is equipped with an electronic airflow monitoring system, which illuminates a blue LED at < 1 m/s. The fault LED illuminates if the smoke detector or the electronics are defective, as well as if the smoke detector is missing. The reset button must be used to unlock the smoke alarm or a fault. The same button also allows for a functional test.

Actuation has the same effect as a smoke alarm. Furthermore, the same function is achieved upon restart if the bridge between terminals 9 and 10 is opened (remote unlock).