Duct Smoke Detector KRM®-DZ

Duct Smoke Detector KRM®-DZ
• DIBt approval No. Z-78.6-200 for control
of fire/smoke protection flaps
Modbus
Oppermann
Regelgeräte
GmbH
Z-78.6-200
VdS
Technical Data
• VdS certification (G210148)
• Patented single tube air sampling system
• Contamination display in % and signalling at 70 %
• Electronic air flow control
• Externally operable reset button in the housing
• Remote reset option via terminals
• Long service life, alarm threshold tracking
• Annual service interval
• Bus interface RS485 (-MOD / -BAC only)
Sensor:
Scattering RM 3.3 (ALK-E)
Supply voltage KRM-1-DZ/KRM-1-DZ-MOD/KRM-1-DZ-BAC:
230 V AC ± 10 %, 50 / 60 Hz
Supply voltage KRM-2/KRM-2-MOD/KRM-2-BAC:
24 V AC (16 – 27,6 V AC) or
24 V DC (21,6 – 27,6 V DC)
Rated current:
KRM-1-DZ/KRM-1-DZ-MOD/KRM-1-DZ-BAC:
Mounting bracket: KS (for insulated / circular ducts)
30 mA
KS-WDG (for insulated / circular ducts in
KRM-2/KRM-2-MOD/KRM-2-BAC:
combination with WDG)
140 mA
Housing:
WDG – waterresistant housing for
Relay outputs:floating
outdoor installation and increasing
Alarm relay locked:
1 changeover contact, 8 A,
protection class to IP65
250 V AC or 24 V DC
1 NC, 8 A, 250 V AC or 24 V DC
Contamination relay: 1 NC contact, 6 A, 250 V AC or 24 V DC
System failure relay: 1 NC contact, 6 A, 250 V AC or 24 V DC
The KRM-DZ duct smoke detector is designed for smoke
Air flow relay:
1 NC contact, 6 A, 250 V AC or 24 V DC
detection in ventilation ducts. It constitutes a combination of a
Operating temperature: -20° C – +50° C
smoke detector with an adapter system, whose measuring tube
Permissible flow: 1 – 20 m/s
and housing have been specially adapted for optimal air flow
Permissible humidity: 10-95% non-condensing
through the smoke detector.
Protection class: IP54, IP65 with WDG
The air duct sampling tube transports the air within the air
Approvals/ Tested:
DIBt approval, Z-78.6-200
duct along the entire length of the tube, through the sensing
VdS certfication G210148
chamber and back into the air duct. Upon detection of smoke,
according to FprEN54-27
the sensor reacts immediately and triggers an alarm. Over time,
LED display:
% contamination level flashes at > 70 % the sensor becomes contaminated. Because of alarm threshold
LED in housing:
greenoperating
tracking, the sensitivity up to total pollution remains the same.
blue
lack of air flow
At 70 % contamination, the sensor indicates contamination. If
yellow failure, electronics,
the sensor is not replaced the smoke alarm is triggered at 99 %
smoke detector defective,
contamination. The contamination level is indication in a two
low voltage
line LED display; at 70 % it flashes and the relay “contamination”
red
smoke alarm, including
drops.
contamination > 99 %, To monitor operability, the device is equipped with electronic
flashes at attempts to release
air flow monitoring, which lights a blue LED at < 1 m/s. The fai
when the sensing chamber is
lure LED illuminates when the smoke sensor or the electronics
not empty
are defective, as well as the absence of a smoke sensor.
Adapter housing:ABS
The smoke alarm must be released with the reset button or a
Air measuring tube:
Aluminium / plastic
malfunction. A functionality test is also possible with the same
shortest length 160 mm
button.
standard length 600 mm
The operation functions like a smoke alarm. Furthermore, the
Dimensions:
approx. 257 x 166 x 77 mm (L x W x H)
same function takes place on restart or when the bridge circuit
Screw connection:
3 x M16
between terminals 9 and 10 is opened (remote release).
Accessories
Function
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Duct Smoke Detector KRM-DZ
14
11
9
13
10
12
1 Adapter plate with gasket
2 Patented measuring tube (max. length 3 m)
3 End cap
4 Rubber bushing
(only for insulated or circular ducts)
5 Lower housing with seal
6 Electronics
7 Optical smoke sensor
8 Upper casing with seal
9 Red LED: alarm / reset button
10 Yellow LED: failure
11 LED display: % of sensor contamination
12 Green LED: in operation
13 Blue LED: air flow under 1 m / s
14 Opening for test gas
15 Air duct
Electrical connection
KRM-1-DZ / KRM-1-DZ-MOD / KRM-1-DZ-BAC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
Power supply
230 V ~ 50 – 60 Hz
green
Power supply
230 V AC
Bus B
Bus B
Bus A
KRM-2-DZ / KRM-2-DZ-MOD / KRM-2-DZ-BAC
Power supply
24 V AC / DC
RS 485
(informative)
Bus A
Test/Reset (NC contact)
Test / Reset
(NC contact)
Test/Reset
Smoke alarm
red
Smoke alarm
Service signal
Contamination
Service signal
system failure
Service signal
air flow
yellow
blue
1
2
3
4
5
6
7
8
Bus B
Bus B
Bus A
RS 485
(informative)
Bus A
9
10
11
12
13
14
15
16
17
18
19
20
21
KRM-1-DZ-MOD
green
Power supply
24 V AC/DC
Test/Reset
Smoke alarm
red
Smoke alarm
Service signal
Contamination
Service signal
system failure
yellow
Service signal
air flow
blue
KRM-2-DZ-MOD
All contact depictions are with the power off (alarm) / no air flow present / Contamination> 70%.
For wiring, see next page.
Remote reset/test (terminal 9 +10): if bridge circuit is removed, a floating NC contact must be connected.
Notes: The floating switching contacts (terminals 11 – 17) are to be assigned as uniformly as possible to an installation category according to
EN 60730-1. These switching contacts are only to be used for 230 V AC or 24 V AC/DC, no combinations are permitted unless at least one contact
between the potentials remains unassigned.
A mixed connection of safety extra-low voltage (SELV) and low voltage must not occur. The assembly may only be operated on one mains phase.
The voltage / safeguard activation is to be provided on site. KRM-1-xx (230 V versions) with a fuse of 16 A; KRM-2-xx (24 V version) with 4 A.
T3+T4
Programming the Bus address for MOD / BAC versions:
Press buttons T3+T4 on the circuit board (to the right, next to the display) at the same time,
so that the display changes from contamination level to show the bus address (the display
will flash). Press button T3 or T4 to adjust the desired address (1 – 99) and confirm with simultaneous pressing of T3 and T4. A device return automatically follows after 3 seconds without
pressing a key.
Note the separate documentation for setting the baud rate (BAC version only)
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Duct Smoke Detector KRM-DZ
Wiring diagram, fire protection flap/smoke protection flap
Valid with software 0020
All contact depictions in the following images are with the power off (alarm)/ with no airflow.
No liability assumed for layout examples shown.
KRM-1-DZ/KRM-1-DZ-MOD/KRM-1-DZ-BAC:
connection to BSK/RSK 230 V AC
Wiring layout example
Supply of the fire/smoke protection
flap can also take place on site
Alternatively the fire/smoke
protection flap can also run over
terminal 14 + 15.
Terminal 9 + 10 (NC contact for
external button)
KRM-1-DZ/KRM-1-DZ-MOD/KRM-1-DZ-BAC:
Connecting fire/smoke protection flap with on site power supply
Wiring layout example for fire/smoke
protection flap
Identical wiring of the fire/smoke
protection flap is also possible with
KRM-2-DZ or KRM-2-DZ-BAC or
KRM-2-DZ-MOD
Alternatively the fire/smoke protection
flap can also run over terminal 14 + 15.
Terminal 9 + 10 (NC contact for
external button)
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Duct Smoke Detector KRM-DZ
KRM-2-DZ / KRM-2-DZ-MOD / KRM-2-DZ-BAC: connecting fire/smoke protection flap 24 V BSK / RSK 24 V
Power supply NT01-24V-AC
and NT02-24V-DC or SM
24 V AC/DC power supply
1
2
3
4
M
Open
Signalization
Closed
Individual contacts
e. g. fan shut-off,
BMS alert
BSK fire protection flap
RSK smoke protection flap
24 V AC /DC
Power supply
24 V AC /DC
green
9
Test/Reset (NC contact)
10
Test/Reset
11
Smoke alarm
12
13
red
14
Smoke alarm
15
Service signal
16
contamination
17
Service signal
18
System failure
yellow
19
20
21
Service signal
air flow
Wiring layout example with fire/
smoke protection flap power supply
via the KRM.
Alternatively the fire/smoke
protection flap can be supplied on
site through an external source.
Terminal 9 + 10 (NC contact for
external button)
blue
KRM-2-DZ / KRM-2-DZ-MOD / KRM-2-DZ-BAC
KRM-2-DZ / KRM-2-DZ-MOD / KRM-2-DZ-BAC:
Connecting fire/smoke protection flap with on site power supply
Power supply NT01-24V-AC
and NT02-24V-DC or SM
24 V AC/DC power supply
24 V *
e. g. 230 V AC on
BSK/RSK 230 V AC
M
Open
Signalization
Closed
BSK fire protection flap
RSK smoke protection flap
24 V AC oder DC
Individual contacts
e. g. fan shut-off,
BMS alert
1
2
3
4
Power supply
24 V AC /DC
green
9
Test/Reset (NC contact)
10
Test/Reset
11
Smoke alarm
12
13
red
14
Smoke alarm
15
Service signal
16
contamination
17
Service signal
18
System failure
yellow
19
20
21
Service signal
air flow
blue
KRM-2-DZ / KRM-2-DZ-MOD / KRM-2-DZ-BAC
Or alternatively fire/smoke protection
flap (BSK/RSK) 230 V AC
* Secure on-site power supply
4 | 12 | Fire Protection | Data sheet No. 41302 | Version 08-2015_1
Wiring layout example for fire/smoke
protection flap.
Alternatively the fire/smoke
protection flap can also run over
terminal 14 + 15.
Terminal 9 + 10 (NC contact for
external button)
Duct Smoke Detector KRM-DZ
Display and operation for Duct Smoke Detector KRM®
LED Smoke alarm (red)
LED Smoke alarm (red)
Display indicator
(contamination in % or status)
LED Failure (yellow)
LED Power supply
(green)
LED Alarm (red) and
Alarm / reset button
LED Air flow (blue)
lights up when there is insufficient flow
Failure reset:
Briefly press button and release
Alarm reset:
Press button for at least 2 seconds
until the red LED goes out
Display
Meaning
Start / calibration
Comments
Shortly after starting the software version is displayed (4 digits),
e. g. 00 then 20 = Software 0020. With BAC versions „bA“ is diplayed.
Thereafter, the rotating segment display follows at startup or after a power failure.
Contamination
in %
Flashes starting at 70 % (relay contamination drops out); at 99 % with display LED alarm.
Failure
e. g. Missing smoke detector, disrupted communication with the smoke detector,
processor failure.
Failure LED & alarm LED light up at the same time.
Troubleshooting: Change the detector and confirm by pressing the alarm / reset button.
Confirmation
reset / new start
If alarm / reset button is pressed for more than 8 seconds, or if bridge circuit / terminal
9 / 10 is open (missing bridge circuit or remote reset). Display goes out after releasing the
alarm / reset button or closing the bridge circuit between terminal 9 + 10.
00 – 99
+
all LEDs on the
circuit board
light up
00 – 99
flashing
BUS address
Display only with MOD/BAC versions after pressing the address buttons T3 / T4 directly on
the circuit board.
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Duct Smoke Detector KRM-DZ
LEDs
Alarm / reset
(red)
Failure
(yellow)
Meaning
Comments
Smoke alarm or
failure
Reset after failure:
Briefly press alarm / reset button. KRM immediately restarts.
Reset after alarm:
Press and hold the alarm / reset button for at least 2 seconds until the red alarm LED in the
button goes out. Do not release it until then. KRM will start again only after release. As long as
the alarm / reset LED flashes when the button is pressed, the smoke sensor is still filled with test
gas / test spray / smoke, and can not be reset. In that case blow the sensor out or wait.
Defective circuit
board or missing Check / replace circuit board or smoke detector RM 3.3 (ALK-E).
smoke alarm
Smoke alarm
Smoke alarm
Red LEDs directly on the smoke detector RM 3.3 (ALK-E).
or contamination
LEDs permanently on until reset has taken place.
(2 x red)
99 %
Power
(green)
Supply voltage
is on
Green LED lights up if supply voltage is on.
Air flow
(blue)
Air flow is too
low
Blue LED lights up when air flow is too low and air relay (only equipped on DIBt versions)
drops out. Check smoke detector position in the duct, check sampling tube (TurboTube)
for conta­mination / clean if necessary.
Behavior of the alarm relay and fault relay and displays, plus reset options
Valid with software 0020
Smoke alarm
Device failure / missing detector…
DIBt versions
KRM-1-DZ / KRM-1-DZ-MOD / KRM-1-DZ-BAC / KRM-2-DZ / KRM-2-DZ-MOD /
KRM-2-DZ-BAC
KRM-1 / KRM-1-MOD / KRM-1-BAC / KRM-2 / KRM-2-MOD /
KRM-2-BAC
DIBt versions
KRM-1-DZ / KRM-1-DZ-MOD / KRM-1-DZ-BAC / KRM-2-DZ / KRM-2-DZ-MOD /
KRM-2-DZ-BAC
KRM-1 / KRM-1-MOD / KRM-1-BAC / KRM-2 / KRM-2-MOD /
KRM-2-BAC
Alarm relay
11 / 12 / 13
Drops out
Drops out
Drops out
Drops out
Alarm relay 14 / 15
Drops out
Drops out
Drops out
Drops out
LED Alarm / Reset
Lights up
Lights up
Lights up
Lights up
Failure relay 18 / 19
Does not drop out
--------Not equipped
Drops out
--------Not equipped
LED failure
Does not light up
Does not light up
Lights up
Lights up
Alarm reset or
failure reset
Not with power
interruption!
It is mandatory to use the
alarm button or terminal
9 / 10 provided that sensing
chamber is free.
With power interruption,
alarm button or with
terminal 9 / 10 provided that
sensing chamber
is free.
Not with power
interruption!
It is mandatory to use the
alarm button or terminal
9 / 10 provided that sensing
chamber is free + disturbance has ceased.
With power interruption,
alarm button or with
terminal 9 / 10 provided that
sensing chamber
is free + disturbance has
ceased.
Installation instructions and positioning
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 KS mounting bracket. With respect to the maximum
6 | 12 | Fire Protection | Data sheet No. 41302 | Version 08-2015_1
width/ maximum height/ maximum diameter of the air ventilation ducts to be monitored with the 600mm long standard
air collecting tube, there are no limitations according to the
VdS approval / DIBt certification. The airflow direction must be
observed during the installation of the air collecting adapter. The
air collecting tube may be mounted laterally below or above the
air duct – the location is arbitrary.
Duct Smoke Detector KRM-DZ
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. We recommend that the
KRM be fitted and installed at the same distance from heating,
cooling and humidity devices as flow sensors. The distance of
the KRM to fittings, valves, filters, etc. in terms of flow direction should be 3 times, and in the diagonal direction 5 times
that of the cross-section, if this structurally possible. The KRM
including the air collecting tube may not be installed along the
longitudinal edges of ventilation ducts (corner area). 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.
reliable smoke detection/flow is ensured. The blue LED “Airflow”
may be used as an indicator of a sufficient flow (the LED is off
with sufficient flow).
Follow these instructions. All work (such as installation, electrical connection, start-up, operation and maintenance), must
be carried out by sufficiently qualified craftsman. Current local
rules and regulations (e.g. building regulations, elecrical/VDE
guidelines, etc.) are to be observed. Installers and operators are
required to be adequately informed before operation. Read the
product description before device start-up. Make sure that the
product is fully suited to the respective applications. We assume
no liability for misprints and changes after printing. Compliance
with operating and installation instructions is also included
within the regulations of intended use. We assume no liability
for damages caused by improper use. Operating licenses and
guarantees and all warranty claims will be voided in the event
of unauthorized modifications or any tampering with the device.
When, for structural reasons, the recommended positioning is
not possible, the KRM is to be mounted so that, nonetheless, a
Example of positioning
after the change of
air duct direction. (Recommendation)
5 dh
Example of positioning
after air outlets. (Recommendation)
Air outlet
5 dh
3 dh
Hydraulic diameter dh
Rectangular duct
Round duct
d h=D
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.
For this Oppermann Regelgeräte provides
a special splash-proof housing (WDG).
d h=
øD
H
2xHxW
H+W
W
Example of positioning (Recommendation)
MIN 3xd h
MIN 5xd h
KRM
MIN 3xd h
KRM
MIN 5xd h
KRM
KRM
Ventilator
MIN 3xd h
MIN 5xd h
KRM
Airflap
MIN 3xd h MIN 5xd h
KRM
KRM
KRM
Battery
Muffler
MIN 5xd h
Change in air
duct direction
MIN 3xd h
MIN 3xd h
KRM
MIN 3xd h
KRM
KRM
MIN 3xd h
MIN 5xd h
MIN 5xd h
Air duct forking
KRM
KRM
KRM
MIN 5xd h
KRM
Air duct narrowing/
Air duct enlargement
KRM
MIN 5xd h
Exhaust air
Supply air
Air duct device
Fire Protection | Data sheet No. 41302 | Version 08-2015_1 | 7 | 12
Duct Smoke Detector KRM-DZ
Installation
min. 160 mm
1.
Drill a hole 43 – 44 mm in diameter at the intended mounting location.
Note: Installation of the TurboTube measuring tube is possible either from
the top, bottom or side of the channel for all duct
cross-sections (for round ducts as well).
Attention: Operation without
end plug not permitted.
2.
• Determine how long the measuring tube must be.
• If necessary, shorten the tube. Minimum length 160 mm.
• Deburr the cutting face and put the end plug back on up to the
stop collar.
Note: Depending on delivery batch, either the transparent end caps
displayed here or black end caps with a slightly different geometry will be
included in the delivery.
3.
• Determine the direction of flow and fit the adapter plate so that
•
the line on the adapter plate under the text ”Strömungsrichtung” is
parallel to the flow direction.
Four self-tapping screws serve for attaching it to the sheet metal
duct (not included in delivery).
Mounting
bracket
4. Installation on a rectangular air duct
• see picture at right
5. Installation on a circular air duct
• For mounting on a circular air duct use mounting bracket type KS
and the rubber bushing . Thanks to the bend
perforations they can be adapted to a round duct.
Rubber bushing
inner
outer
The type KS mounting
bracket is supplied flat.
Mounting bracket
6. Installation on air ducts with insulation
• Use the rubber bushing and insert it into the Ø 43 – 44 mm
open­ing in the air duct.
• Install the mounting bracket.
• Insert the assembled adapter plate into the measuring tube by
sliding the measuring tube through the grommet, and screw the
adapter plate onto the mounting bracket using the 4 self-tapping
screws. Then the insulation can be installed.
7. Installation outdoors or in a cold environment
• As protection for smoke detectors which are exposed to the open
air or in a cold environment there is a special WDG type splash-proof
housing. This enclosure prevents the warm air in the smoke detector
duct from condensing. The interior of the housing is insulated with
foam rubber.
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Insulation
Duct Smoke Detector KRM-DZ
Application example:
8. Installing the housing with the sensor
• Attach the housing bottom part with the electronics and sensor to the
•
•
•
•
•
adapter plate. The housing can be attached at increments of 90°. The
direction of the housing has no effect on the measurement result. You
can align the housing with the sensor optimally.
Check that the seals in the housing upper part are correctly positioned.
By snapping on and tightening the upper housing and then firmly
pressing down on the arrow marked on the central cable area (to ensure
that the catch at the lower end of the housing snaps in correctly), the
mounting is complete.
Wire the unit according to the applicable circuit diagram.
Attention: wiring and electrical connections may only be carried out by
a qualified electrician.
Make sure that all cables are connected by a properly qualified electrician. The cable jacket for field wire connecting must be done as near as
possible to the terminal block. For wires longer than 10 mm, the wire
must be fixed by a cable clip near the terminal block or insulated in
pairs with a suitably protective tube (see application example).
9. Testing the duct smoke sensor
• After completing the installation work, doing proper wiring (please
•
•
•
note the separate data sheets / circuit diagrams) and applying power,
the duct smoke sensor is operational.
The green LED (12) illuminates.
By pressing the alarm / reset button (9), an initial simple functional
test can be made. All LEDs must light up and all the relays drop out.
The units connected to the relays are activated! The display (11)
indicates the current degree of sensor contamination. If the button
is released, all LEDs will go out except for LED (12) which shows the
supply voltage, and the relays activate.
To test the smoke detector, we first recommend opening the case,
remove the front cover and spray directly with Oppermann Test
Spray. This is the simplest method. Alternatively, there is a test port
(14) in the center of the transparent cover. Here, the test spray tube
must be fully inserted into the opening (with this method, the tube
is placed permanently into the port), and release as much test gas
as needed until the smoke detector responds. Insert the test spray‘s
tube fully into the test opening (appx. 1.5mm deep) and release as
much test gas as needed until the smoke sensor activates. Please
do not spray too much, otherwise the smoke sensor may display
a higher degree of contamination at the next start / reset. The
alarm / reset button lights up, the relays drop out. The electronics
are on alert and locked. To release, the alarm / reset button must be
pressed. At the time of the reset, the sensor must be free of smoke
and test gas. Should there still be test gas in the chamber a higher
degree of contamination will appear. In this case, after some time
perform a reset by disconnecting from the power or by an external
reset, or if necessary, remove the housing cover and blow out the
smoke detector.
To activate the test with smoke
spray remove housing shell.
Alternatively, use the test port.
10. Final review
• Are all screws tight?
• Is the adapter plate properly mounted for the
flow direction?
• Are all seals in the correct position?
• In operation, when air flow > 1 m / s the blue
LED may not light up.
Fire Protection | Data sheet No. 41302 | Version 08-2015_1 | 9 | 12
Duct Smoke Detector KRM-DZ
Maintenance and repair
1. Instructions for operation and
maintenance
The operator is responsible for the safe function of the ventilation system. He has to ensure that the smoke sensors are always
ready for operation and that they are maintained, including all
controlling components and systems.
In order to ensure good performance over a longer period of
time the smoke alarms must be tested at least once a year. Without maintenance, and depending on environmental conditions,
the sensor will become dirty sooner or later, and after a certain
time will trigger an alarm, which is a false alarm.
All types will give a specific maintenance requirement
signal at a contamination level of 70 % (display flashes,
relay contamination drops out).
Targeted maintenance can be carried out since the smoke
detector is equipped with a 2-digit digital contamination
indicator. From a 70 % contamination level or higher the smoke
sensor must be changed. There is a contact available for this
“contamination” signal, and it should be connected to the automation station.
Caution:
Before opening the housing, unlock all supply voltages – The
housing may only be opened by a qualified electrician. Supply
and switching voltages must be observed.
Please note the symbols on the device:
Caution voltage
Before working on equipment, turn voltage off
Please follow the instructions
The following work is required and can only be carried out by us
or by our authorized experts:
1. The smoke detector is accessible by removing the cover.
2. Maintenance and repair work
Before starting with the maintenance work, the functional
integrity of the unit when it is exposed to smoke must be clarified with the staff. If, due to operational specifications shortterm shutdowns cannot be tolerated, measures must be taken
to prevent this; if necessary by placing a bridge over the alarm
contact, but remembering to remove it after completion of the
service work. After maintenance work, a complete functionality test of all plant parts must be carried out. If defects have
appeared they must be removed immediately. A protocol must
be made after all maintenance work and the results are to be
written into the operation manual, which is to be signed by the
operator in charge.
2. By turning the white detector on the base by about 20°
to the left the sensor can be unscrewed. If it is too dirty
(indicator >70 %), and no later than the prescribed standard of exchange cycles, the sensor must be removed and
exchanged for a new sensor.
3. Also to be cleaned:
• the cover
• the TurboTube measuring tube
• the inner housing
4. Check the electrical connections, possibly tightening the
terminals. Make visual inspection and clean the electrical
circuit board if necessary, as well as the inner housing. Check
all seals.
5. Assemble all parts
6. Test system by triggering the smoke detector with Oppermann Test Spray.
10 | 12 | Fire Protection | Data sheet No. 41302 | Version 08-2015_1
Duct Smoke Detector KRM-DZ
7. Check with the operator about the function of the downstream systems and components, such as:
• Turning off of fans
• Closing of flaps
• Notification to the building automation system
• When checking network failure and recovery, does the
sensor return to its normal function and does it unlock
again from the state ”smoke alarm” and return to its normal
3. For DIBt approved smoke sensors
type KRM-1-DZ / KRM-1-DZ-MOD/
KRM-1-DZ-BAC / KRM-2-DZ / KRM-2-DZ-MOD / KRM-2-DZ-BAC
the following additional work is
necessary
1. Check airflow monitoring. If the flow rate falls below 1.0 m / s,
the blue LED illuminates. Air stream relay (terminal 20 / 21)
must open. If this is not the case, the KRM needs to be moved
to another location with sufficient flow.
2. Check system failure. With the removal of the smoke sensor
in the event and defective electronics, the failure relay drops
off,and the yellow light comes on. The control panel relay
(terminal 18 / 19) must open. At the same time both alarm
relays (terminals 14/15 and 11/13) must drop off and the
red LED alarm light comes on.
3. Check the working coordination of all components with
a functional test. This is part of the building inspection
approval. By triggering the smoke sensor with our test spray
the two red LEDs light up, and on the circuit board the LED
”alarm / reset” lights up in red as well. Relay and changeover
smoke alarm (terminals 14 / 15 and 11 / 13) must open. The
BSK closes by spring return.
function when there is no longer any present?
• Release is possible by pressing the reset button (types:
•
KRM-1-DZ, KRM-1-DZ-MOD, KRM-1-DZ-BAC, KRM-2-DZ,
KRM-2-DZ-MOD and KRM-2-DZ-BAC) or with brief power
interruptions (only for types KRM-1, KRM-1-MOD,
KRM-1-BAC, KRM-2, KRM-2-MOD and KRM-2-BAC).
Release and approve for operation.
5. Malfunctions should be eliminated immediately.
6. Register the results of the maintenance in an operations
manual.
The KRM’s general technical approval is to be noted
The KRM must bring the fire or smoke protection flaps to the
designated safety position (ON) in the following cases.
• When smoke is detected by the smoke detector
• In case of failure by the smoke detector unit
(e. g. wire breakage, missing smoke detectors, short-circuit)
• In case of power failure
• With restoration of power supply after previously occurring
release (smoke detection and/or fault)
• Upon activation of the Alarm/RESET button in the smoke
detection unit
• When exceeding the optical smoke detector’s permissible
degree of contamination (99 %)
After a power failure and subsequent restoration of the power
supply and without the previous occurring release (smoke
detection and/or fault), the approved device returns to a ready
state. With the approved device, the fire or smoke protection
flaps, whose maximal connection does not exceed the maximal
load of the floating contact of the smoke detection systems, can
be controlled, and released.
4. Checking the operation after power failure: After power
failure and recovery the smoke sensor is set back into its state
before the power failure. Both states; “normal operation” and
“smoke alarm” are to be checked after disconnection from the
power supply. The reset can only be made after the failure
and / or alarm has been corrected.
Fire Protection | Data sheet No. 41302 | Version 08-2015_1 | 11 | 12
Duct Smoke Detector KRM-DZ
Dimensions
166
24
233
233
166
24
77
70
37.3
40
70
37.3
40
L= min. 160 mm
L= min. 160 mm
Dimensions in mm
50
50
Oppermann Regelgeräte GmbH | Im Spitzhau 1 | 70771 Leinfelden-Echterdingen, Germany
Phone +49 711 72723560 | Fax +49 711 7280527 | info@oppermann-regelgeraete.de | www.oppermann-regelgeraete.de
12 | 12 | Fire Protection | Data sheet No. 41302 | Version 08-2015_1 Subject to change.

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