KRM-X-1-BAC-DZ 0.16

Oppermann KRM-1-DZ-BAC 0.16
230 V AC BAC (BACnet) with DIBt approval, for controlling fire/smoke dampers

incl. sampling tube LKR 0.16 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 +15% / -10%
Rated current: 140 mA
Relay outputs: potential-free
Alarm relay latched:
1 changeover contact, 8 A, 250 V AC 1 normally closed contact, 8 A, 250 V AC or 24 V DC
Contamination relay: 1 normally closed contact, 6 A, 250 V AC or 24 V DC
System fault relay: 1 normally closed contact, 6 A, 250 V AC or 24 V DC
Airflow relay: 1 normally closed contact, 6 A, 250 V AC or 24 V DC
Operating temperature: -20 °C - +50 °C
Perm. flow: 1 - 20 m/s
Perm. humidity: 10 - 95 % non-condensing
Protection class: IP 54, with WDG IP 65
Approvals/tests: DIBt approval Z-78.6-200, VdS approval G210059, FprEN5427
LED display: Contamination level %, flashes > 70 %
LEDs 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:
Aluminium/Plastic
Shortest length 160 mm
Standard length 600 mm
Dimensions: 257 x 166 x 77 mm (L x W x H)
Connection screw fitting: 3 x M16

Function

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

To monitor its functionality, the device is equipped with electronic airflow monitoring, which illuminates a blue LED when the flow is < 1 m/s. The fault LED illuminates if the smoke detector or electronics are defective, or if the smoke detector is missing. The smoke alarm or a fault must be unlocked using the reset button. The same button can also be used for a functional test.

Actuation acts like a smoke alarm. Furthermore, the same function is achieved upon restart by opening the bridge between terminals 9 and 10 (remote unlocking).