Oppermann Regelgeräte KRM-X User manual

KRM-X® Duct Smoke Detector
Fire Protection | Data sheet No. 41350 | Version 01-2019 | 1| 10
Technical Data
Detector type: RM 3.3-X (ALN-E)
scattered light detector
Supply voltage: KRM-X-1/KRM-X-1-MOD/
KRM-X-1-BAC:
230 V AC ± 10 %, 50/60 Hz
Supply voltage: KRM-X-2/KRM-X-2-MOD/
KRM-X-2-BAC:
24 V AC (16 – 27,6 V AC) or
24 V DC (21,6 – 27,6 V DC)
Rated current: KRM-X-1 /KRM-X-1-MOD/
KRM-X-1-BAC: 30 mA
KRM-X-2/KRM-X-2-MOD/
KRM-X-2-BAC: 120 mA
Relay outputs: oating
Alarm relay locked: 1 changeover contact, 8 A,
250 V AC or 24 V DC
1NC contact, 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
Permissible ow: 1 – 20 m/s
Permissible humidity: 10 – 95 % non-condensing
Protection type: IP 65
Certication/Approvals: VdS approval G219046, G219053
DIN EN 54-27
LED display: % contamination level:
ashes at > 70%
LED in housing: green operational
blue lack of airow
yellow failure, electronics,
smoke detector defective
red smoke alarm including
contamination > 99% ashes
at attempts to release when
detector chamber is not yet
cleared
Adapter housing: ABS
Air measuring tube: aluminum/plastic
shortest length 160 mm
standard length 600 mm
maximum length: 3009 mm
Dimensions: approx. 271 x 172 x 85 mm (L x W x H)
Cable gland: 3 x M16
• VdS approval (G219046, G219053)
• Patented single tube air sampling system
• Contamination display in %
and signaling at 70 %
• Electronic air ow control
• Externally operable reset button in housing
• Remote reset option via terminals
• Long service life, alarm threshold tracking
• Bus interface RS485 (-MOD/-BAC only)
Accessories
Mounting bracket: KS-X (for insulated / circular ducts)
KS-X (for insulated / circular ducts
in combination with WDG-X)
Housing: WDG-X protective insulating housing
with alarm display for outdoor installation
Function
The KRM-X duct smoke detector is designed for smoke detection
in ventilation ducts. It is a combination of a smoke detector and
an adapter system whose measuring tube and housing have
been specially adapted for optimal airow through the smoke
detector.
The multi-chamber measuring tube in the air duct carries the air
within the air duct along the entire length of the tube, through
the detector chamber and back into the air duct. Upon detec-
tion of smoke, the detector reacts immediately and triggers an
alarm. Over time, the sensor becomes contaminated. Detector
sensitivity remains constant up to complete contamination due
to alarm threshold tracking. The detector triggers from 70 % con-
tamination upwards, indicating this by ashing. If the detector is
not replaced, a smoke alarm is triggered at 99 % contamination.
The contamination level is indicated in a two-line LED display,
which begins to ash at > 70 % contamination. At the same time
the“contamination”relay drops out.
Operability is veried by electronic airow monitoring, with a
blue LED lighting up at < 1 m/s. The failure LED lights up when the
smoke detector or the electronic system is defective, and in the
absence of a smoke detector. The smoke alarm must be released
with the reset button. The same button can be used to perform
a functionality test. This test simulates a smoke alarm. The same
function is activated on restart, as well as when the bridge circuit
between terminals 9 and 10 is opened (remote release).
Modbus

KRM-X® Duct Smoke Detector
2| 10 | Fire Protection | Data sheet No. 41350 | Version 01-2019
power supply
230 V AC
test/reset
(NC contact)
9
10
11
12
13
14
15
green
16
17
yellow
blue
smoke alarm
smoke alarm
service signal
contamination
red
test/reset
3
4
power supply
230 V AC
1
2
KRM-1
10
1
2
3
4
5
6
7
8
9
11
12
13
15
Electrical connection
10
9
11
12
13
14 1 Adapter plate with gasket
2 Patented measuring tube
3 End cap
4 Rubber bushing
(only for insulated or circular ducts)
5 Housing base with gasket
6 Electronics
7 Optical smoke detector
8 Housing top with gasket
9 LED red: alarm/reset button
10 LED yellow: failure
11 LED display: sensor contamination in %
12 LED green: in operation
13 LWD blue: airow below 1 m/s
14 Opening for test gas
15 Air duct
All contact diagrams are shown
in the power-o state
(alarm)/ contamination > 70%
optional informative
RS 485 bus interface
(see KRM-X-2-MOD/-BAC)
Remote reset/test (terminal 9 +10): if bridge circuit is removed,
a oating NC contact must be connected.
Note: The oating switching contacts (terminals 11 – 17) should be
assigned as uniformly as possible to an installation category
according to EN 60730-1. These switching contacts are to be used for
230 V AC only for or 24 V AC / DC only. Combinations are not permit-
ted unless at least one contact between dierent potentials remains
unassigned. Mixed congurations of safety extra-low voltage
(SELV) and low voltage are not allowed. The assembly may only be
operated on one mains phase. Disconnection / Electrical protection
equipment must be provided by the customer.
KRM-X.-1-xx (230 V versions) with a fuse of 16 A;
KRM-X-2-xx (24 V versions) with 4 A.
KRM-X-2, 24 VKRM-X-1, 230 V
KRM-X-2-MOD, 24 V
KRM-X-2-BAC, 24 V
power supply
24 V AC/DC
test/reset
(NC contact)
9
10
11
12
13
14
15
green
16
17
yellow
blue
smoke alarm
smoke alarm
service signal
contamination
red
test/reset
3
4
power supply
24 V AC/DC
1
2
KRM-2
power supply
24 V AC/DC
test/reset
(NC contact)
9
10
11
12
13
14
15
green
16
17
yellow
blue
smoke alarm
bus B
bus B
bus A
bus A
smoke alarm
service signal
contamination
red
test/reset
3
4
5
6
7
8
power supply
RS485
(informative)
power supply
24 V AC/DC
1
2
KRM-2-MOD

Fire Protection | Data sheet No. 41350 | Version 01-2019 | 3| 10
KRM-X® Duct Smoke Detector
Display and Operation of KRM-X Duct Smoke Detector
smoke alarm LED (red) smoke alarm LED (red)
failure LED (yellow) power supply LED (green)
alarm LED (red) & alarm /reset button
failure reset:
Briey press button and release.
alarm reset:
Press button for at least 2 seconds
until red LED goes out
Display indication:
(contamination in % or status)
Display view Meaning Comments
Start / calibration
Shortly after startup, the software version is displayed (4 digits), e. g. 00 then 20 = software
version 0020. With BAC versions are indicated by“bA”.
At startup or after a power failure, this is followed by a rotating segment display.
00 – 99
Contamination
in %
Flashes starting at 70 % (contamination relay drops out);
at 99 % the alarm LED alarm lights up.
Failure
E.g. smoke detector missing, communication with smoke detector disrupted,
processor failure.
Failure LED & alarm LED light up at the same time.
Troubleshooting: Replace detector and conrm by pressing alarm/reset button.
+
All LEDs on
circuit board
light up
Conrmation of
reset / new start
Occurs when 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
Flashing Bus address Only appears with MOD/BAC versions after pressing the address buttons
T3/T4 directly on the circuit board.
Airow LED (blue)
lights up when there
is insucient ow

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4| 10 | Fire Protection | Data sheet No. 41350 | Version 01-2019
LEDs Meaning Comments
Alarm / reset
(red)
Smoke alarm or
failure
Reset after failure:
Briey press alarm/reset button. KRM-X restarts immediately.
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-X will start again only after release. If the
alarm/reset LED continues to ash while the button is pressed, the smoke detector is still
lled with test gas/test spray/smoke and cannot be reset. In that case blow out detector
out or wait.
Failure
(yellow)
Circuit board
defective or smoke
detector missing
Check/replace circuit board or RM 3.3-X (ALN-E) smoke detector.
Smoke alarm
(2 x red)
Smoke alarm or
contamination > 99%
Red LEDs directly on the RM 3.3-X (ALN-E) smoke detector. LEDs remain on until reset has
taken place.
Power supply
(green)
Supply voltage
connected Green LED lights up if supply voltage is connected.
Airow (blue) Insucient airow
Blue LED lights up when airow is too low and air relay (only present on DIBt versions)
drops out. Check smoke detector position in the duct, check sampling tube (TurboTube)
for contamination and clean if necessary.
Programming the bus address and baudrate
(Modbus/BACnet versions only):
Display view Comments
Press buttons T3+T4 on circuit board (to the right of the display) simultaneously to switch from
the contamination display to the bus address display (display ashes).
Display ashes
Use button T3 or T4 to enter the desired address (1–99). The default address on delivery is 99.
The display returns to its previous state after 3 seconds without a button being pressed.
After pressing T3+T4 simultaneously the current bus address is saved and the two underscores
appear for about one second.
Display and
yellow LED ash
Now the baudrate can be selected (display and yellow LED ash); available baudrates:
01 = 9600 (default)
02 = 19200
03 = 38400
04 = 76800
After pressing T3+T4 simultaneously once more the current baudrate is saved and the two
underscores appear for about one second, after which the device returns to the contamination
display.
Note: After 6 seconds without a button being pressed the device returns to the contamination display,
and the current value is saved.
T3+
T4

Fire Protection | Data sheet No. 41350 | Version 01-2019 | 5| 10
KRM-X® Duct Smoke Detector
Valid for soft-
ware 0020
and higher
In the event of a smoke alarm In the event of device failure / missing detector
KRM-X-1 / KRM-X-1-MOD /
KRM-X-1-BAC /
KRM-X-2 / KRM-X-2-MOD /
KRM-X-2-BAC
KRM-X-1 / KRM-X-1-MOD /
KRM-X-1-BAC /
KRM-X-2 / KRM-X-2-MOD /
KRM-X-2-BAC
Alarm relay
11 / 12 / 13 Drops out Drops out
Alarm relay 14 / 15 Drops out Drops out
LED alarm / Reset Lights up Lights up
Fault relay 18 / 19 ---------
Not present
---------
Not present
Fault relay Stays o Lights up
Alarm reset or
failure reset
Disconnect power or press alarm button or reset via terminal
9/10, provided detector chamber has been cleared.
Disconnect power or press alarm button or reset via terminal
9/10, provided detector chamber has been cleared and fault
rectied.
Behavior of the Alarm Relay and Fault Relay and Displays, Plus Reset Options
Installation Instructions and Positioning
The KRM-X must be positioned in accordance with the applicable
local regulations on ventilation systems. Reliable smoke detection
must be ensured. The air collecting tube may be cut to a length of
160 mm, depending on the cross-section of the ventilation duct.
It must not be cut to less than this minimum length of 160 mm.
Using the KS-X mounting bracket, this makes it possible to mon-
itor ducts up to <100 mm ø. There is no maximum width, height
or diameter for air ventilation ducts monitored with the 600 mm
long standard air collecting tube under the VdS approval/
DIBt certication. The indicated airow direction must be
observed when installing the tube adapter. The air collecting
tube may be mounted laterally, below or above the air duct – the
location makes no dierence.
In the ideal case, as far as is structurally possible, install the KRM-X
in a location where ow meters etc. are normally installed, so that
there is a laminar airow along the measuring tube. We recom-
mend mounting and installing the KRM-X at the same distance
from heating, cooling and humidity devices and in a similar way
as ow sensors. The distance of the KRM-X to ttings, valves,
lters, etc. should be 3 times the diagonal of the channel
cross-section against the ow direction and 5 times with the ow
direction, if this is structurally possible. The KRM-X, including the
Example of positioning
after a change of air duct
direction (recommendation)
Example of positioning
after an air outlet (recommendation)air outlet
Where there are large temperature dierences,
outdoors for example, or in places that are
dependent on outside temperature (roof, attic),
the air duct smoke detector needs to be insulated.
Oppermann Regelgeräte provides a special
splash-proof housing (WDG-X) for this purpose.
5 dh
3 dh 5 dh

KRM-X® Duct Smoke Detector
6| 10 | Fire Protection | Data sheet No. 41350 | Version 01-2019
MIN 3xd hMIN 5xd hMIN 3xd hMIN 5xd hMIN 3xd hMIN 5xd hMIN 3xd hMIN 5xd h
KRMKRMKRMKRMKRMKRMKRMKRM
KRM
KRM
KRM KRM KRM
KRM
KRM
KRM
MIN 5xd h
MIN 3xd h
MIN 5xd h
MIN 5xd h
MIN 3xd h
MIN 3xd hMIN 5xd h
MIN 5xd h
MIN 3xd h
Exhaust air
Supply air
Ventilator Airap Muer Battery
Air duct device
Air duct narrowing/
air duct enlargement
Air duct forking
Change of
air duct direction
dh =2xHxB
H+B
H
B
Rectangular duct
dh =D øD
Round duct
Hydraulic diameter dh
Example of positioning (recommendation)
air collecting tube, may not be installed along the longitudinal
edges of ventilation ducts (corner area). The KRM-X must be
installed such that the air collecting tube is constantly located in
the air stream. In horizontal ventilation ducts the KRM-X, includ-
ing the air collecting tube, should be installed in the upper third
of the ventilation duct or at the top of the ventilation duct, if this
is structurally possible.
If the positioning recommendations cannot be followed for
structural reasons, the KRM-X should be mounted such that
reliable smoke detection and airow are nonetheless ensured.
The blue airow LED serves as an airow indicator
(the LED is o with sucient ow).
Observe these instructions. All work (such as installation, electri-
cal connection, startup, operation, and maintenance) must only
be performed by suciently qualied tradesmen. The respec-
tively applicable local rules and regulations (e.g. national building
codes, electrical/VDE regulations, etc.) must be observed. Install-
ers and operating entities are required to suciently familiarize
themselves before startup. Read the product description before
operating the equipment. Verify that the product can be used
for the relevant application without restrictions. We are not liable
for printing errors and changes after printing. Appropriate use
implies compliance with operating and installation instructions.
We are not liable for losses due to inappropriate use. Unautho-
rized manipulations or modications of the device render the
operating permit, the product warranty and warranty claims null
and void.

Fire Protection | Data sheet No. 41350 | Version 01-2019 | 7| 10
KRM-X® Duct Smoke Detector
Installation
1.
Drill a hole 43 – 44 mm in diameter at the intended
mounting location.
Note: The TurboTube measuring tube can be installed on top or
at the bottom or side of the duct for all duct cross-sections
(including round ducts).
2.
• Determine how long the measuring tube must be.
• If necessary, shorten the tube; minimum length 160 mm including
end plug (cutting length 145 minimum – see drawing).
• Deburr the cutting face and put the end plug back on up to the stop
collar.
Note: The KRM-X must only be used with the red end plug.
Observe the mark on the end plug indicating the ow direction.
3.
• Determine the direction of ow and mount the adapter plate such
that the line on the adapter plate under the text ”Strömungsrichtung”
is parallel to the ow direction.
• Four self-tapping screws (not included in delivery) serve for attaching
the adapter plate to the sheet metal duct.
4. Installation on the duct
• Rectangular air duct – see picture on the right
• For installation on a circular air duct, use the KS-X-type mounting
bracket and the rubber bushing. The mounting bracket has bend
perforations for adaption to a round duct.
The KS-X-type mounting
bracket is supplied at.
5. 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 together with the measuring tube
by sliding the measuring tube through the bushing, and screw the
adapter plate onto the mounting bracket using 4 self-tapping screws.
Then the insulation can be installed.
min. 145 mm
Mounting
bracket
inside
Rubber bushing
Mounting
bracket Insulation
outside
Caution: operation without
end plug not allowed
Cutting length of aluminum tube 145
Minimum length 160

KRM-X® Duct Smoke Detector
8| 10 | Fire Protection | Data sheet No. 41350 | Version 01-2019
6. Installation outdoors or in a cold environment
• A special WDG-type splash-proof housing is available for protection of
smoke detectors exposed to the open air or a cold environment. This
housing prevents the warm air in the smoke detector duct from con-
densing. The interior of the housing is insulated with foam rubber.
7. Installing the housing with the sensor
• Attach the housing base with the electronics and sensor to the adapter
plate. The housing can be attached in any of the four orthogonal orien-
tations. The direction of the housing has no eect on the measurement
result. You can optimally align the housing with the sensor.
• Wire the device according to the applicable circuit diagram.
• Caution: Wiring and electrical connections may only be done by a duly
qualied electrician.
• Make sure that all cables are connected in accordance with the applica-
ble electrical regulations. The cable jacket must reach as close as possi-
ble to the terminal block. Wires longer than 10 mm must be xed near
the terminal block using a cable clip or the like or must be insulated in
pairs with a suitable protective tube (see application example).
• Check that the gaskets in the housing top are correctly positioned.
• Complete the installation by snapping on and tightening the housing
top (ensuring that the catch at the lower end of the housing snaps in
correctly; observe the specied mounting torque of 1.2 Nm).
8. Testing the duct smoke detector
• After completing the installation work, properly wiring the device
(please note the separate data sheets / circuit diagrams) and applying
power, the duct smoke detector is operational.
• The green LED (12) lights up.
• Press the alarm / reset button (9) to perform a simple initial functional
test. All LEDs must light up and all relays drop out. The units con-
nected to the relays are activated! The display (11) indicates the
current degree of sensor contamination. On releasing the button, all
LEDs go out except for LED (12), which shows the supply voltage, and
the relays pull in. A test opening (14) is available for testing the duct
smoke detector. Open the test hole plug. Then spray test spray into the
test opening until the smoke detector triggers. Take care not to apply
too much test spray, since this would contaminate the smoke detector,
possibly causing it to indicate a higher contamination level after the
next start or reset.
• Caution: Take care to close the test hole opening after the test to
prevent the smoke detector from drawing in false air. False air could
prevent the smoke detector from triggering when it should. The alarm/
reset button lights up, and the relays drop out. The electronic system
goes into alarm state and locks up. Press the alarm/reset button to
release it. The sensor must be free of smoke and test gas during
reset. If there is still test gas in the chamber, the device will indicate a
higher contamination level. In this case, wait a while and then perform
a reset by disconnecting the voltage or perform an external reset. If
necessary, remove the housing cover and blow out the smoke detector.
9. Final review
• Are all screws tight?
• Is the adapter plate properly mounted in terms of ow
direction?
• Are all gaskets in the correct position?
• The blue LED must not light up when airow > 1 m / s
during operation.
Use the test opening for performing the functional test.
Caution: The test opening should always be closed
during operation, as this would otherwise prevent
smoke detection!
11
9 9
14 14
12
wiring example:
1)
The WDG-X special housing is not covered by the VdS
approval.

Fire Protection | Data sheet No. 41350 | Version 01-2019 | 9| 10
KRM-X® Duct Smoke Detector
Maintenance and repair
1. Instructions for Operation and
Maintenance
The operator is responsible for the safe function of the ven-
tilation system. He has to ensure that the smoke detectors
are always operational and properly maintained, including all
controlling components and systems.
The smoke detector must be tested at least once a year in order
to ensure that it performs reliably over long time periods. With-
out maintenance the sensor will become soiled sooner or later,
depending on environmental conditions, and will eventually
trigger an alarm, i.e. a false alarm.
All types will give a specic“maintenance due”
signal at a contamination level of 70 % (display ashes,
contamination relay drops out).
The smoke detector is equipped with a 2-digit digital contam-
ination indicator, allowing maintenance according to demand.
The smoke detector must be replaced at a contamination level
70 % or higher. The contact provided for this“contamination”
signal should be connected to the automation station.
2. Maintenance and repair work
Before starting maintenance work, it must be claried with the
sta whether the unit needs to remain responsive to smoke
while work is in progress. If a brief shutdown cannot be cannot
be tolerated for operational reasons, measures must be taken
to prevent a shutdown. If necessary, a bridge can be placed
over the alarm contact for this purpose. After completion of
maintenance work, any such bridge must be removed, and a
complete functional test of all system components must be
carried out. Any defects found must be rectied immediately.
Every maintenance check must be documented in a report, and
the results must be entered in the operation manual and signed
by the operator in charge.
Caution:
Before opening the housing, disconnect all supply voltages. The
housing may only be opened by a qualied electrician. Supply
and switching voltage ratings must be observed
Please observe the following symbols on the device:
The following work is required and can only be carried out by us
or by our authorized technicians:
1. The smoke detector can be accessed by removing the cover.
2. The detector can be removed by turning it on the base by
about 20° to the left. The detector must be replaced by a new
detector if it has reached the contamination limit (indicator
>70 %) or if the prescribed standard replacement period has
expired, whichever is earlier.
3. The following must also be cleaned:
• the cover
• the TurboTube measuring tube
• the inner housing
Caution – voltage
Turn voltage o before working on equipment.
Please follow the instructions.

10 | 10 | Fire Protection | Data sheet No. 41350 | Version 01-2019 Subject to change.
KRM-X® Duct Smoke Detector
Oppermann Regelgeräte GmbH | Im Spitzhau 1 | D-70771 Leinfelden-Echterdingen
Telefon [phone] | Telefax [phone] | [e-mail] |www.oprg.de
172
249
22
40
L= min 160 mm - max. 3009 mm
31
84,50
52,50
70
37,3
11,4
7. Check with the operator about the function of downstream
systems and components, such as:
• Turning o of fans
• Closing of aps
• Notication to the building automation system
• When checking network failure and recovery, does the
detector return to its normal function and does it unlock
again from the ”smoke alarm” state and return to its normal
function when the alarm has been reset? Does the detector
return to the alarm state and lock up if the smoke alarm
persists?
• The detector can be released by pressing the reset button
or briey disconnecting the voltage.
• Release and approve for operation.
Dimensions
Dimensions in mm
4. Check the electrical connections, tightening the terminals as
necessary. Make a visual inspection of and clean the electrical
circuit board as well as the inner housing as necessary. Check
all gaskets.
5. Assemble all components, observing the specied torque
of 1.2 Nm for screws.
6. Perform a functional test by triggering the smoke detector
with Oppermann test spray.