Produal KRM-X-1 User manual

USER GUIDE
KRM-X-1 & KRM-X-2
V1.0 (07.05.2020)
1 (9)
Produal Oy Keltakalliontie 18, 48770 Kotka FINLAND Tel: [phone] / Fax: [phone] [e-mail] www.produal.com
Information is subject to change without prior notice.
5 d
h
3 d
h
5 d
h
SENSOR CONSTRUCTION
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: airflow below 1 m/s
14. Opening for test gas
15. Air duct
ASSEMBLING
Device assembly, wiring and commissioning can only be carried out by qualified professionals.
Always make the wirings while the power is switched off.
Positioning of the sensor
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 monitor 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 certification. The indicated airflow
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 difference.
In the ideal case, as far as is structurally possible, install the KRM-X in a location where flow meters etc.
are normally installed, so that there is a laminar airflow along the measuring tube. We recommend
mounting and installing the KRM-X at the same distance from heating, cooling and humidity devices and
in a similar way as flow sensors. The distance of the KRM-X to fittings, valves, filters, etc. should be 3
times the diagonal of the channel cross-section against the flow direction and 5 times with the flow
direction, if this is structurally possible. The KRM-X, including the 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,
including 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.
Example of positioning after the
change of air duct direction Air outlet
Example of positioning after air
outlets.
1
15
10
11
12
13
14

USER GUIDE
KRM-X-1 & KRM-X-2
2 (9)
Produal Oy Keltakalliontie 18, 48770 Kotka FINLAND Tel: [phone] / Fax: [phone] [e-mail] www.produal.com
Information is subject to change without prior notice.
If the positioning recommendations cannot be followed for structural reasons, the KRM-X should be
mounted such that reliable smoke detection and airflow are nonetheless ensured. The blue airflow LED
serves as an airflow indicator (the LED is off with sufficient flow).
Observe these instructions. All work (such as installation, electrical connection, start-up, operation, and
maintenance) must only be performed by sufficiently qualified tradesmen. The respectively applicable
local rules and regulations (e.g. national building codes, electrical/VDE regulations, etc.) must be
observed. Installers and operating entities are required to sufficiently familiarize themselves before start-
up. 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. Unauthorized manipulations or modifications of the device render the
operating permit, the product warranty and warranty claims null and void.
Hydraulic diameter, dh
dh =2xHxW
H+W
H
W
dh =D
øD
Round duct Rectangular duct
Example of positioning (recommendation):
MIN 3xd
h
MIN 5xd
h
MIN 3xd
h
MIN 5xd
h
MIN 3xd
h
MIN 5xd
h
MIN 3xd
h
MIN 5xd
h
KRM
KRMKRMKRMKRMKRMKRMKRM
Fan Damper Silencer Heater
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
h
MIN 5xd
h
MIN 5xd
h
MIN 3xd
h
Exhaust air
Supply air
Change in air duct
direction
Air duct forking Air duct narrowing / air
duct enlargement
Air duct device
Mounting procedure
1. Drill a hole Ø 43…44 mm in diameter at the intended mounting location.
NOTE: Installation of the measuring tube is possible either from the top, bottom or side of the chan-
nel for all duct cross-sections (for round ducts as well).
2. Determine how long the measuring tube must be. If necessary, shorten the tube. Remove the burr
from the cut tube and put the end plug back on up to the stop collar.
min. 145 mm
Caution: operation without
end plug not allowed
IMPORTANT: Operation without end plug is not allowed. Fit the end plug according to the flow direc-
tion marks.

USER GUIDE
KRM-X-1 & KRM-X-2
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Produal Oy Keltakalliontie 18, 48770 Kotka FINLAND Tel: [phone] / Fax: [phone] [e-mail] www.produal.com
Information is subject to change without prior notice.
3. Determine the direction of flow and fit the adapter plate (A) so that the line on the adapter plate un-
der the text ”Strömungsrichtung” is parallel to the flow direction. Use four self-tapping screws (not in-
cluded in delivery) for attaching the plate to the duct.
A
4. When installing on a rectangular air duct, fit the plate directly to the tube. When installing on a circu-
lar air duct, use KS-X fitting plate (B) and rubber bushing (C).
C
B
C
5. When installing on the air ducts with insulation, use the rubber bushing and insert it into opening in
the air duct. Install the fitting plate (B). Insert the assembled adapter plate (A) into the measuring
tube by sliding the measuring tube through the bushing and screw the adapter plate onto the fitting
plate (B) using 4 self-tapping screws. Then the insulation (D) can be installed.
BD
C
A
Rubber
bushing, inner
outer

USER GUIDE
KRM-X-1 & KRM-X-2
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Produal Oy Keltakalliontie 18, 48770 Kotka FINLAND Tel: [phone] / Fax: [phone] [e-mail] www.produal.com
Information is subject to change without prior notice.
6. When installing sensor outdoors or in cold environment, use WDG type housing. Housing prevents
the warm air in the smoke detector duct from condensing. The interior of the housing is insulated
with foam rubber.
7. Attach the housing bottom part (G) with the electronics and sensor to the adapter plate (A).
The housing (G+F) 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.
The cover screw tightening torque is 1.2 Nm.
F
G
A
8. Wire the unit according to the applicable wiring diagram.
Power supply
230 Vac
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 Vac
1
2
Power supply
24 Vac/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 Vac/dc
1
2
5
6
7
8
Bus B
Bus B
Bus A
Bus A
RS485
(for information)
MOD / BAC models
KRM-X-1 KRM-X-2, KRM-X-2-MOD, KRM-X-2-BAC
•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.
•Test/reset (terminal 9 +10): if bridge circuit is removed, a floating NC contact must be
connected.
•The floating 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 only to be
used for 230 Vac or 24 Vac/dc. Combinations are not permitted unless at least one contact

USER GUIDE
KRM-X-1 & KRM-X-2
5 (9)
Produal Oy Keltakalliontie 18, 48770 Kotka FINLAND Tel: [phone] / Fax: [phone] [e-mail] www.produal.com
Information is subject to change without prior notice.
between the potentials remains unassigned. A mixed connection 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 with a
suitable fuse.
Programming the bus address and bus speed for the KRM-2-MOD / KRM-2-BAC
1. 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).
The device returns automatically to previous state after
3 seconds without a button being pressed.
2. Press the T3 or T4 button to set address (1 – 99)
3. Confirm the address with simultaneously pressing of T3
and T4. The value is saved when two underscores
appear on the display (“_ _”).
4. Set the bus speed.
The available speeds are:
01 = 9600 bit/s (default)
02 = 19800 bit/s
03 = 38400 bit/s
04 = 76800 bit/s
5. Confirm the bus speed with simultaneously pressing of
T3 and T4. The value is saved when two underscores
appear on the display (“_ _”).
NOTE: The current value is also
saved after 6 seconds without a
button being pressed.
TESTING THE SENSOR
1. 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 connected 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.
11
9 9
14 14
12
2. Open the test hole cover (14).
3. Insert the test spray‘s tube fully into the test opening and release as much test gas as needed until
the smoke sensor activates. 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.
4. Press the Alarm reset button for 2 second to reset the alarm. At the time of the reset, the sensor
must be free of smoke and test gas.
5. 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 from the detector.

USER GUIDE
KRM-X-1 & KRM-X-2
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Produal Oy Keltakalliontie 18, 48770 Kotka FINLAND Tel: [phone] / Fax: [phone] [e-mail] www.produal.com
Information is subject to change without prior notice.
DISPLAY AND OPERATION
A. Smoke alarm (red).
B. Failure (yellow).
C. 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 light goes out.
D. Display indicator (contamination in % or status).
E. Power supply (green).
F. Air flow (blue) lights up when there is insufficient air
flow
Display Meaning Explanation
Start /
calibration
Shortly after starting the software version is displayed (4 digits), e. g.
00 then 20 = Software 0020. The BACnet versions are indicated with
“bA”. At startup or after a power failure, this is followed by a rotating
segment display.
Contamination in
%
Flashes starting at 70 % (contamination relay drops out). At 99 %, the
alarm light illuminates.
Failure e.g. Missing smoke detector, disrupted communication with the
smoke detector, processor failure.
Failure (B) and alarm (A) lights light up at the same time
Troubleshooting: change the detector and confirm by pressing the
alarm / reset button (C).
+
all lights on
the circuit
board light
up
Confirmation of
reset / new start
Occurs when alarm/reset button (C) 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.
Indicator
lights
Meaning Explanation
Alarm / reset
(red)
Smoke alarm or
failure
Reset after failure:
Briefly press alarm / reset button. KRM-X immediately restarts.
Reset after alarm:
Press and hold the alarm/reset button for at least 2 seconds until the
red alarm light in the button goes out. KRM-X will start again after
releasing the button. If the alarm/reset light continues to flash while
the button is pressed, the smoke detector is still filled with test
gas/test spray/smoke and cannot be reset. In that case, blow out the
smoke from the detector or wait.
A
B
C
A
D
E
F

USER GUIDE
KRM-X-1 & KRM-X-2
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Produal Oy Keltakalliontie 18, 48770 Kotka FINLAND Tel: [phone] / Fax: [phone] [e-mail] www.produal.com
Information is subject to change without prior notice.
Indicator
lights
Meaning Explanation
Failure
(yellow)
Defective circuit
board or missing
smoke alarm
Check / replace circuit board or smoke detector.
Smoke
alarm (2 x
red)
Smoke alarm or
contamination
99 %
Red LEDs directly on the smoke detector. LEDs permanently on until
reset has taken place.
Power
(green)
Supply voltage
is connected
Green light illuminates if supply voltage is connected.
Air flow
(blue)
Air flow is too
low
Blue light illuminates when air flow is too low. Check smoke detector
position in the duct, check sampling tube for contamination / clean if
necessary.
Behaviour of the alarm relay and fault relay and displays, plus reset options
Valid with
software
0020
Smoke alarm Device failure / missing detector
Alarm relay,
connectors
11/12/13
Drops out Drops out
Alarm relay,
connectors
14/15
Drops out Drops out
Alarm / Reset
light Lights up Lights up
Failure light Does not light up Lights up
Alarm reset or
failure reset
Disconnect power or press alarm
button or reset via terminal 9/10.
Detector chamber must have been
cleared.
Disconnect power or press alarm button or
reset via terminal 9/10. Detector chamber must
have been cleared and fault rectified.
MAINTENANCE AND REPAIR
The smoke detector must be tested at least once a year in order to ensure that it performs reliably over
long time periods. Without maintenance the sensor will become soiled sooner or later, depending on
environmental conditions, and will eventually trigger an alarm, i.e. a false alarm.
NOTE: The sensor will give a specific maintenance requirement signal at a contamination level of 70 %
(display flashes, relay contamination drops out). The smoke detector is equipped with a 2-digit digital
contamination 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.
Maintenance and repair procedure
Before starting maintenance work, it must be clarified with the staff whether the unit needs to remain
responsive to smoke while work is in progress. If a brief shutdown 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
rectified immediately.
Before opening the housing, turn off all supply voltages – The housing may only be opened by
a qualified electrician. Supply and switching voltages must be observed.

USER GUIDE
KRM-X-1 & KRM-X-2
8 (9)
Produal Oy Keltakalliontie 18, 48770 Kotka FINLAND Tel: [phone] / Fax: [phone] [e-mail] www.produal.com
Information is subject to change without prior notice.
1. Remove the cover.
2. Turn the white sensor element anticlockwise about 20° to remove it.
The detector must be replaced by a new detector if it has reached the contamination limit (>70 %) or
if the prescribed standard replacement period has expired, whichever is earlier.
3. Clean the cover, measuring tube and the inner housing.
4. Check the electrical connections, tightening the terminals if needed.
5. Make visual inspection and clean the electrical circuit board if needed, as well as the inner housing.
Check all seals.
6. Assemble all parts.
The cover screw tightening torque is 1.2 Nm.
7. Test system by triggering the smoke detector with test spray.
9
14
8. 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? 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 briefly disconnecting the voltage.
MODBUS
Modbus properties
Protocol
RS-485 Modbus RTU
Bus speed
9600/19200/38400/76800 bit/s
Data bits
8
Parity
even
Start bits
1
Stop bits
1
Polling
> 100 ms

USER GUIDE
KRM-X-1 & KRM-X-2
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Produal Oy Keltakalliontie 18, 48770 Kotka FINLAND Tel: [phone] / Fax: [phone] [e-mail] www.produal.com
Information is subject to change without prior notice.
Modbus function codes
Decimal
Hexadecimal
Function
3
0x03
Read Holding Registers
Modbus registers
Holding
register
Parameter description Data type Values Range
0 Device status. U16 1 - 2 - 3 - 4 - 5 -
6
1 = Normal function
2 = Starting
3 = Fault
4 = Alarm
5 = Alarm and fault
6 = 99 % contamina-
tion
1
Smoke detector value. If the value is over
255, there is smoke in the detector. The value
is only informative.
U16 0...65535 0...65535
2
Contamination value.
U16
0...100
0...100 %
3 Air flow status U16 0 - 1
0 = Inadequate air
flow
1 = Adequate air flow
4
NTC temperature value. The value can be
used to determine the ambient temperature.
The value is combination of the ambient
temperature and self-heating of the circuit
board. See the following table for the
temperature values according to the Modbus
register values.
U16 0...65535 0...65535
Register
value
Temp [°C]
Register
value
Temp [°C]
Register
value
Temp [°C]
Register
value
Temp [°C]
75
50,2
147
33,3
298
17,1
615
2,0
79
48,8
155
32,0
314
16,0
647
1,0
83
47,5
159
31,4
326
15,2
681
0,0
87
46,3
167
30,3
342
14,2
716
-1,0
91
45,2
175
29,2
350
13,7
754
-2,0
95
44,1
183
28,1
362
12,9
794
-3,0
99
43,0
191
27,1
378
12,0
839
-4,0
103
42,0
199
26,2
396
11,0
881
-5,0
107
41,1
207
25,3
417
10,0
933
-6,0
111
40,2
218
24,1
437
9,0
979
-7,0
115
39,3
226
23,3
458
8,0
1033
-8,0
119
38,4
234
22,5
482
7,0
1090
-9,0
123
37,6
250
21,0
505
6,0
1150
-10,0
127
36,8
262
20,0
530
5,0
135
35,3
274
19,0
558
4,0
143
34,0
286
18,0
586
3,0