Duct Smoke Detector KRM
Duct Smoke Detector KRM®
• VdS certification (G210059)
• Patented single tube air sampling system
• Contamination display in %
and signalling at 100 %
• Electronic air flow control
• Externally operable reset button in the
housing
Technical Data
Sensor:
Scattering RM 3.3 (ALK-E)
Supply voltage KRM-1: 230 V AC ± 10 %, 50/60 Hz
Supply voltage KRM-2/KRM-2-MOD:
24 V AC/DC +15 % / -10 %
Rated current:
KRM-1: 30 mA
KRM-2/KRM-2-MOD: 120 mA
Relay outputs:
floating
Alarm relay locked:
1 changeover contact, 8 A,
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
Operating temperature: -20 °C – +50 °C
1 – 20 m/s
Permissible flow:
Permissible humidity: 10 – 95 % non-condensing
Protection class:
IP54, IP65 with WDG
(water resistant housing)
Certification/approvals: VdS approval G210059
according to FprEN54-27
LED display:
% contamination level flashes
at > 70 %
LED in housing:
green operating
blue lack of air flow
yellow failure, electronics,
smoke detector defective,
low voltage
red smoke alarm, including
contamination > 99 %, flashes at attempts to release
when the sensing chamber is
not 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)
Screw connection:
3 x M16
• Remote reset option via terminals
• Long service life, low contamination
• Modbus interface (KRM-2-MOD only)
Accessories
Mounting bracket:
Housing: KS (for insulated / circular ducts)
KS-WDG (for insulated / circular ducts in
combination with WDG)
WDG – waterresistant housing for
outdoor installation and increasing
protection class to IP65
Function
The KRM duct smoke detector is designed for smoke detection in
ventilation ducts. It constitutes a combination of a smoke detector with an adapter system, whose measuring tube and housing
have been specially adapted for optimal air flow through the
smoke detector.
The multi-chamber measuring tube in the air duct transports the
air within the air duct along the entire length of the tube, through
the sensing chamber and back into the air duct. Upon detection
of smoke, the sensor reacts immediately and triggers an alarm.
Over time, the sensor becomes contaminated. Because of alarm
threshold tracking, the sensitivity up to total pollution remains
the same. From 70 % contamination upwards, the sensor is triggered and indicates this by flashing. If the sensor is not replaced
the smoke alarm is triggered at 99 % contamination. The contamination level is indicated in a two-line LED display; at > 70 % it
flashes.
To verify operability, the device is equipped with electronic air
flow monitoring, which lights a blue LED at < 1 m/s. The failure
LED illuminates when the smoke sensor or the electronics are
defective, and in the absence of a smoke detector.
The smoke alarm must be released with the reset button.
A functionality test is also possible with the same button.
The operation functions like a smoke alarm.
Furthermore, the same function takes place on restart or when
the bridge circuit between terminals 9 and 10 is opened (remote
release).
Fire Protection | Data sheet No. 41300 | Version 06-2012 | 1 | 9
Duct Smoke Detector KRM
8
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
14
7
10
11
6
5
1
4
15
11
12
9
13
10
13
12
9
2
3
Electrical connection
Power supply
230 V AC
Test/Reset
(NC contact)
1
2
3
4
green
Power supply
230 V AC
9
10
11
12
13
14
15
16
17
Adapter plate with gasket
Patented measuring tube (max. length 3 m)
End cap
Rubber bushing
(only for insulated or circular ducts)
Lower housing with seal
Electronics
Optical smoke sensor
Upper casing with seal
Red LED: alarm / reset button
Yellow LED: failure
LED display: % of sensor contamination
Green LED: in operation
Blue LED: air flow under 1 m / s
Opening for test gas
Air duct
Power supply
24 V AC / DC
Test/Reset
(NC contact)
Test/Reset
Smoke alarm
red
Smoke alarm
Service signal
Contamination
1
2
3
4
Power supply
230 V AC
9
10
11
12
13
14
15
16
17
Test/Reset
Smoke alarm
red
Smoke alarm
Service signal
Contamination
yellow
yellow
blue
blue
KRM-2
KRM-1
KRM-1, 230 V
Power supply
24 V AC / DC
Test/Reset
(NC contact)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
green
KRM-2, 24 V
green
Power supply
24 V AC/DC
Bus B
Bus B
Bus A
RS485 Modbus
(for information)
Bus A
Power supply
Test/Reset
Programming the Bus address for the KRM-2-Mod:
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). The
last set bus address is automatically saved. The display resets automatically after 3 seconds or by simultaneously pressing T3+T4.
Smoke alarm
red
Smoke alarm
Service signal
Contamination
KRM-2-MOD, 24 V
yellow
blue
Contact depictions are with
the power off (alarm)
KRM-2-MOD
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.
2 | 9 | Fire Protection | Data sheet No. 41300 | Version 06-2012
Duct Smoke Detector KRM
Display and operation for Duct Smoke Sensor KRM
LED Smoke alarm (red)
LED Smoke alarm (red)
Display indicator
(contamination in % or status)
LED Failure (yellow)
LED Power supply
(green)
LED Air flow (blue)
lights up when there is insufficient flow
LED Alarm (red) and
Alarm / reset button
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
Contamination
in %
Comments
Shortly after starting the software version is displayed (4 digits),
e. g. 00 then 20 = Software 0020
Thereafter, the rotating segment display follows at startup or after a power failure.
Flashes starting at 70 %; at 99 % with display LED alarm.
00 – 99
+
all LEDs on the
circuit board
light up
00 – 99
flashing
Failure
e.g. Missing smoke detector, disrupted communication with the smoke detector,
processor failure.
Failure LED & alarm LED light up at the same time (not on the DIBt version).
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.
BUS address
Display only with MOD versions after pressing the address buttons T3 / T4 directly on the
circuit board.
Fire Protection | Data sheet No. 41300 | Version 06-2012 | 3 | 9
Duct Smoke Detector KRM
LEDs
Meaning
Comments
Reset after failure:
Briefly press alarm / reset button. KRM immediately restarts.
Alarm / reset
(red)
Smoke alarm
or failure
Defective circuit
board or missing Check / replace circuit board or smoke detector RM 3.3 (ALK-E).
smoke alarm
Failure
(yellow)
Smoke alarm
(2 x red)
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.
Smoke alarm
Red LEDs directly on the smoke detector RM 3.3 (ALK-E). LEDs permanently on until reset has
or contamination
taken place.
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-2-DZ
KRM-2-DZ-MOD
KRM-1 / KRM-2
KRM-2-MOD
DIBt versions
KRM-1-DZ / KRM-2-DZ
KRM-2-DZ-MOD
KRM-1 / KRM-2
KRM-2-MOD
Alarm relay
11 / 12 / 13
Drops out
Drops out
Drops out
Drops out
Relais Alarm
14 / 15
Drops out
Drops out
Drops out
Drops out
LED
Alarm / Reset
Lights up
Lights up
Lights up
Lights up
Relay failure
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
4 | 9 | Fire Protection | Data sheet No. 41300 | Version 06-2012
maximum width/ maximum height/ maximum diameter of the
air ventilation ducts to be monitored with the 600 mm 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
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.
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
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).
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
d h=
øD
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).
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
KRM
MIN 3xd h MIN 5xd h
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. 41300 | Version 06-2012 | 5 | 9
Duct Smoke Detector KRM
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
2.
end plug not permitted.
• 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.
6 | 9 | Fire Protection | Data sheet No. 41300 | Version 06-2012
Insulation
Duct Smoke Detector KRM
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.
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.
For testing the smoke sensor the housing must not be opened. It has
a self-closing test opening (14) in the center of the transparent cover.
Use Oppermann test gas spray. Insert the test spray‘s tube fully into
the test opening (appx. 1.5 mm 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.
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. 41300 | Version 06-2012 | 7 | 9
Duct Smoke Detector KRM
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).
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, and dirt and dust can
be removed. If it is too dirty (indicator >70 %), 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
8 | 9 | Fire Protection | Data sheet No. 41300 | Version 06-2012
Duct Smoke Detector KRM
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.
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
function when there is no longer any present?
• Release is possible by pressing the reset button (types:
KRM-1-DZ, KRM-2-DZ and KRM-2-DZ-MOD) or with
brief power interruptions (only for types KRM-1, KRM-2,
KRM-2-MOD)
• Release and approve for operation.
233
166
Dimensions
166
24
77
70
233
37.3
40
24
77
50
Dimensions in mm
70
37.3
40
L= min. 160 mm
Oppermann Regelgeräte GmbH | Im Spitzhau 1 | D-70771 Leinfelden-Echterdingen
min.
160 mm | Telefax +49 711 7280527 | [email protected] | www.oppermann-regelgeraete.de
Telefon +49L=711
72723560 Subject to change. Fire Protection | Data sheet No. 41300 | Version 06-2012 | 9 | 9
166
83
4
233
~260
110
44
Drilling template
Dimensions in mm
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