Trox Technik RM-O-M User manual

RM-O-M
Duct smoke detector
Installation and operating manual GB/en

A00000046508, 1, GB/en
Translation of the original
© 2021 TROX GmbH
TROX GmbH
Heinrich-Trox-Platz
47504 Neukirchen-Vluyn
Germany
Phone: [phone]
Fax: [phone]
E-mail: [email protected]
Internet: http://www.troxtechnik.com
09/2023
RM-O-M Duct smoke detector2

General information
About this manual
This operating and installation manual enables
operating or service personnel to correctly install
the TROX product described below and to use it
safely and efficiently.
This operating and installation manual is intended
for use by fitting and installation companies, in-
house technicians, technical staff, instructed per-
sons, and qualified electricians or air conditioning
technicians.
It is essential that these individuals read and fully
understand this manual before starting any work.
The basic prerequisite for safe working is to comply
with the safety notes and all instructions in this
manual.
The local regulations for health and safety at work
and general safety regulations also apply.
This manual must be given to the system owner
when handing over the system. The system owner
must include the manual with the system documen-
tation. The manual must be kept in a place that is
accessible at all times.
Illustrations in this manual are mainly for informa-
tion and may differ from the actual design.
Copyright
This document, including all illustrations, is pro-
tected by copyright and pertains only to the corre-
sponding product.
Any use without our consent may be an infringe-
ment of copyright, and the violator will be held liable
for any damage.
This applies in particular to:
Publishing content
Copying content
Translating content
Microcopying content
Saving content to electronic systems and
editing it
TROX Technical Support
To ensure that your request is processed as quickly
as possible, please keep the following information
ready:
Product name
TROX order number
Delivery date
Brief description of defect or issue
Online www.trox.de
Phone [phone]
General information
RM-O-M Duct smoke detector 3

Limitation of liability
The information in this manual has been compiled
with reference to the applicable standards and
guidelines, the state of the art, and our expertise
and experience of many years.
The manufacturer does not accept any liability for
damages resulting from:
Non-compliance with this manual
Incorrect use
Operation or handling by untrained individuals
Unauthorised modifications
Technical changes
Use of non-approved replacement parts
The actual scope of delivery may differ from the
information in this manual for bespoke construc-
tions, additional order options or as a result of
recent technical changes.
The obligations agreed in the order, the general
terms and conditions, the manufacturer's terms of
delivery, and the legal regulations in effect at the
time the contract is signed shall apply.
We reserve the right to make technical changes.
Warranty claims
The provisions of the respective general delivery
terms apply to warranty claims. For purchase
orders placed with TROX GmbH, these are
the regulations in section "Vl. Warranty claims"
of the Delivery Terms of TROX GmbH, see
www.trox.de/en/.
Safety notes
Symbols are used in this manual to alert readers to
areas of potential hazard. Signal words express the
degree of the hazard.
Comply with all safety instructions and proceed
carefully to avoid accidents, injuries and damage to
property.
DANGER!
Imminently hazardous situation which, if not
avoided, will result in death or serious injury.
WARNING!
Potentially hazardous situation which, if not
avoided, may result in death or serious injury.
CAUTION!
Potentially hazardous situation which, if not
avoided, may result in minor or moderate injury.
NOTICE!
Potentially hazardous situation which, if not
avoided, may result in property damage.
ENVIRONMENT!
Environmental pollution hazard.
Tips and recommendations
Useful tips and recommendations as well as
information for efficient and fault-free operation.
General information
RM-O-M Duct smoke detector4

Safety notes as part of instructions
Safety notes may refer to individual instructions.
In this case, safety notes will be included in
the instructions and hence facilitate following the
instructions. The above listed signal words will be
used.
Example:
1. Loosen the screw.
2.
CAUTION!
Danger of finger entrapment when
closing the lid.
Be careful when closing the lid.
3. Tighten the screw.
Specific safety notes
The following symbols are used in safety notes to
alert you to specific hazards:
Warning signs Type of danger
Warning – danger
zone.
General information
RM-O-M Duct smoke detector 5

1 Safety.......................................................... 7
General safety notes.................................... 7
Correct use.................................................. 7
Qualified staff............................................... 8
Safety signs................................................. 8
2 Technical data............................................ 9
Dimensions.................................................. 9
Duct smoke detector.................................. 10
Sensor head............................................... 11
Type plate................................................... 11
3 Transport and storage............................. 12
4 Parts and function................................... 12
General functional description................... 12
RM-O-M with air guide profile.................... 13
RM-O-M with sensor head in air duct........ 13
Accessories................................................ 14
Operating status displays .......................... 15
5 Installation................................................ 19
General notes on installation..................... 19
Mounting on rectangular air duct............... 21
Mounting on round air duct........................ 23
6 Electrical connection............................... 24
Supply voltage and wiring to the actuator.. 25
Supply voltage 230 V AC,
Spring return actuator 230 V AC................ 25
Supply voltage 230 V AC,
Spring return actuator 24 V DC.................. 26
Supply voltage 24 V DC,
Spring return actuator 24 V DC.................. 26
Connect display module............................. 27
Integration into the central building man-
agement system (BMS)............................. 27
Expansion modules.................................... 28
7 Commissioning / Function test / Reset.. 30
Commissioning.......................................... 30
Airflow monitoring...................................... 30
Functional test............................................ 30
Reset.......................................................... 31
8 Maintenance............................................. 32
General information................................... 32
Repair work................................................ 33
Open / close inspection cover.................... 33
Check seal................................................. 33
Check/replace sensor head....................... 33
9 Accessories and spare parts.................. 38
10 Index.......................................................... 39
Table of contents
RM-O-M Duct smoke detector6

1 Safety
General safety notes
Electrical voltage
DANGER!
Danger of electric shock! Do not touch any live
components! Electrical equipment carries a dan-
gerous electrical voltage.
– Only skilled qualified electricians are allowed
to work on the electrical system.
– Switch off the power supply before working
on any electrical equipment.
Correct use
The smoke detector is used for smoke detec-
tion in ventilation and air-conditioning systems
(AHU).
Fire dampers or smoke protection dampers
can be triggered (closed) by the smoke
detector.
The duct smoke detector can also be used to
switch off the fan in a ventilation system.
The duct smoke detector can be used in
supply and extract air systems.
In public swimming pools, the use is only per-
mitted in pure supply air ducts (without circu-
lating air).
Use in extract air ducts for kitchens or labo-
ratories must be checked on a case-by-case
basis.
Operation is only permitted in accordance with
the installation instructions and the technical
data in these installation and operating instruc-
tions.
Modifying the duct smoke detector or using
replacement parts that have not been
approved by TROX is not permitted.
Only use TROX test gas for the function test.
Incorrect use
WARNING!
Danger due to incorrect use!
Misuse of the duct smoke detector can lead to
dangerous situations.
The duct smoke detector must not be used:
– in areas with potentially explosive atmos-
pheres (EX);
– outdoors without adequate protection
against the effects of weather;
– in areas with direct sunlight
– in atmospheres where chemical reactions,
whether planned or unplanned, may cause
damage to the duct smoke detector or lead
to corrosion
Safety
RM-O-M Duct smoke detector 7

Qualified staff
WARNING!
Danger of injury due to insufficiently qualified
individuals!
Incorrect use may cause considerable injury or
damage to property.
– Only specialist personnel must carry out
work.
Personnel:
Skilled qualified electrician
Trained personnel
Qualified electrician
The qualified electrician is a person who due to his
professional training, knowledge, and experience,
as well as knowledge of applicable standards and
regulations, is capable of executing work on elec-
trical equipment and is capable of autonomously
recognizing and avoiding possible hazards.
The qualified electrician is specially trained for the
work environment where he is active and is familiar
with the relevant standards and regulations.
Skilled qualified electrician
Skilled qualified electricians are individuals who
have sufficient professional or technical training,
knowledge and actual experience to enable them to
work on electrical systems, understand any poten-
tial hazards related to the work under consideration,
and recognise and avoid any risks involved.
Trained personnel
Trained personnel are individuals who have suffi-
cient professional or technical training, knowledge
and actual experience to enable them to carry out
their assigned duties, understand any potential haz-
ards related to the work under consideration, and
recognise and avoid any risks involved.
Safety signs
The following symbols and information signs can be
found on the product.
WARNING!
Danger due to illegible signage!
Over time, labels and signs can become dirty
or otherwise unrecognisable, so that hazards
cannot be recognised and necessary operating
instructions cannot be followed. There is then a
risk of injury.
– Ensure that all of the safety, warning and
operating information is clearly legible.
– Replace illegible signs or labels immediately.
Electrical voltage
Only qualified electricians are allowed to work in
areas marked as having electrical voltage.
Unauthorised persons must not open the marked
areas.
Safety
RM-O-M Duct smoke detector8

2 Technical data
Dimensions
Fig. 1: Dimensions and space required
1for variant with air guide profile: H ≥ Air guide
profile
2Space requirement for connection lines
3for variant with sensor head in duct, opening in
air duct ∅100...105 mm
4for variant with air guide profile, opening in air
duct ∅40...45 mm
Technical data
RM-O-M Duct smoke detector 9

Duct smoke detector
Nominal operating voltage DC 24 V ±10%
Nominal operating voltage AC 230 V AC ±15% 50-60 Hz
Operating voltage range DC 21.6 V DC ... 28.8 V DC ± 3%
Cut-off range DC < 22.3 V DC and > 28.0 V DC
Power consumption without accessories (nominal opera-
tion)
5 VA (at 230 V AC); 3.6 W (at 24 V DC)
Power consumption with display or expansion module
(nominal operation)
6 VA (at 230 V AC); 4.8 W (at 24 V DC)
Current consumption without accessories (nominal opera-
tion)
40 mA (at 230 V AC); 150 mA (at 24 V DC)
Current consumption with display or expansion module
(nominal operation)
50 mA (at 230 V AC); 200 mA (at 24 V DC)
Maximum connected load spring return actuator 10 VA (230 V AC/ 24 V DC)
Internal fuse 500 mA, slow-blow
Maximum connection diameter 2.5 mm²
Relay contact FD Alarm (motherboard) 230 V AC or 24 V DC; 8A
Relay contact Sys Fail (motherboard) 24 V DC; 1A
Relay contact Alarm BMS (EM-RELAY) 24 V DC; 1A
Relay contact Airflow (EM-RELAY) 24 V DC; 1A
Relay contact Pollution (EM-RELAY) 24 V DC; 1A
IP protection level IP42
Protection class 230V AC / 24 V DC II (protective insulation) / III (protective extra-low voltage)
Minimum length air guide profile 90 mm (600 mm in scope of delivery)
permissible airflow velocity 1.0…20 m/s
Alarm threshold for volume flow rate 0.8 m/s
Alarm threshold for increased contamination > 70%
Operating temperature -10…65 °C
Relative humidity 5 %…90 %, no condensation
Storage temperature -20…70 °C
Weight max. 1.1 kg (without air guide profile)
Technical data
RM-O-M Duct smoke detector10

Dimensions 340×144×80 mm (L×W×H)
EC conformity / approval Construction Products Regulation (EU) no. 305/2011
EN 54-27:2015 - Fire detection and fire alarm systems
- Smoke detectors for monitoring ventilation ducts
General building inspectorate licence Z-78.X-XX
VdS approval number: G 22 30 17
Sensor head
Nominal operating voltage DC DC 3.3 V ± 5%
Current consumption at rest 5 μA
Current consumption with display 24 mA max.
Type plate
Fig. 2: Type plate (example)
1 Type
2 Manufacturer's address
3 Specification of the supply voltage
4 Protection level
5 Power consumption
6 CE mark
7Test/reset button
Ä ‘Function test with test/
reset button’ on page 30
8 Order data
9 National conformity mark (Ü-Zeichen)
10 VdS approval number
11 QR code for downloading technical informa-
tion
Technical data
RM-O-M Duct smoke detector 11

3 Transport and storage
Delivery check
Check delivered items immediately after arrival for
transport damage and completeness. In case of
any damage or an incomplete shipment, contact the
shipping company and your supplier immediately.
Delivery depends on the options ordered according
to the order key. The order key is listed in the ship-
ping documents.
Transport on site
If possible, transport the smoke detector in its pack-
aging until it reaches the place of installation. Do
not remove the packaging until immediately before
installation.
Storage
For temporary storage please note:
Remove any plastic wrapping.
Protect the product from dust and contamina-
tion.
Store the product in a dry place and away from
direct sunlight.
Do not expose the unit to the effects of
weather (not even in its packaging).
Do not store the product below -20 °C or
above 70 °C.
Packaging
Properly dispose of packaging material.
4 Parts and function
General functional description
In order to prevent the spread of smoke in buildings
through ventilation and air-conditioning systems, it
is important to detect smoke at an early stage. The
duct smoke detector RM-O-M is used to control and
trigger fire dampers or smoke protection dampers.
The duct smoke detector operates on the principle
of light scattering and detects the smoke regard-
less of its temperature, so that fire dampers close
before their release temperature is reached. The
fire dampers or smoke control dampers are closed
in the event of interrupting the supply voltage to the
spring return actuator (alarm relay R1).
The duct smoke detector can also be used to switch
off the fan in a ventilation system.
LED indicators can be used to display information
such as smoke detection or the degree of soiling of
the sensor head.
With the optional expansion module EM-RELAY,
Ä Chapter 6.2.1.2 ‘EM-RELAY’ on page 29, the
evaluated information can be forwarded to the cen-
tral building management system.
EM-
RELAY
- Relay board for evaluation of alarm,
contamination and airflow monitoring
The descriptions for commissioning
and configuration can be found in the
corresponding commissioning and con-
figuration descriptions.
The duct smoke detector is supplied in two different
versions:
RM-O-M with air guide profile Fig. 3
RM-O-M with sensor head in duct Fig. 4
Transport and storage
RM-O-M Duct smoke detector12

RM-O-M with air guide profile
Functional description
With this variant, the air guide profile permanently
directs air from the air duct into the sensor head,
and back into the air duct. The sensor head is
installed in the casing of the RM-O-M and is easily
accessible via the inspection cover. For round air
ducts, we recommend using the variant with air
guide profile.
Fig. 3: RM-O-M with air guide profile
①Inspection cover RM-O-M
②Inspection window with LED display
Ä on page 15
③Casing
④Display module (optional)
⑤Type plate
⑥Test/reset button
⑦Cable gland
⑧Seal
⑨Air guide profile
⑩End cap
RM-O-M with sensor head in air duct
Functional description
With this variant, the sensor head sits directly in the
air duct. After removing the inspection cover, the
sensor head can be easily removed from the air
duct.
Fig. 4: RM-O-M with sensor head in air duct
①Inspection cover RM-O-M
②Inspection window with LED display
Ä on page 15
③Casing
④Display module (optional)
⑤Type plate
⑥Test/reset button
⑦Cable gland
⑧Seal
⑨Sensor head
Parts and function
RM-O-M Duct smoke detector 13

Accessories
Display module
On the optional display module, the operating and
status messages are shown in detail by four col-
oured LEDs and an alphanumeric 2-character dis-
play. If the installation situation is difficult to reach,
the display module can be fixed in an accessible
place. For this purpose, the display module can be
attached to magnetic surfaces or to the supplied
mounting bracket. The scope of delivery includes,
depending on the attachment variant, a 0.2 m or
an 8 m cable, max. cable length 8 m; cable type:
standard network cable e. g. SF-UTP.
Fig. 5: Display module
①LED yellow - contamination >70%
②LED blue - airflow monitoring
③LED green - operation
④Status indicator
Ä on page 18
⑤LED red - alarm
⑥Test/reset button
⑦Mounting bracket
⑧Magnets
⑨Connection socket for connection with smoke
detector RM-O-M
Function of the LED indicators, Ä on page 17
Parts and function
RM-O-M Duct smoke detector14

Operating status displays
Mainboard / sensor head
Operating status
LED Mainbord LED
Sensor head
Damper blade posi-
tion
red green yellow Status Colour OPEN CLOSED
Normal operation green
Normal operation
Contamination >70% …<90% yellow
Normal operation
Airflow < 0.8 m/s 1yellow
Alarm position (immediate release)
Contamination >90% red
Alarm position (immediate release) 2
Smoke red
Alarm position (immediate release)
Test or manual release Flashing consecutively for one second each
Alarm position (immediate release)
System error red
OFF
No supply voltage –
1) only with activated airflow monitoring
2)triggered by smoke (event or maintenance)
LED Status off on blinking
Parts and function
RM-O-M Duct smoke detector 15

Relay circuits
Operating status
Mainboard Extension board (EM-RELAY) Damper blade
position
Alarm FD Sys.Fail Airflow Pollution Alarm BMS OPEN CLOS
ED
Normal operation
Normal operation
Contamination >70% …<90%
Normal operation
Airflow < 0.8 m/s 1
Alarm position (immediate
release)
Contamination >90%
Alarm position (immediate
release) 2
Smoke
Alarm position (immediate
release)
Test or manual release
Alarm position (immediate
release)
System error
OFF
No supply voltage
1) only with activated airflow monitoring
2) triggered by smoke (event or maintenance)
Parts and function
RM-O-M Duct smoke detector16

Display module (optional)
Operating status
LED
Status indicator
Damper blade
position
red yellow blue 3green OPEN CLOSE
D
Normal operation XX 4
Normal operation
Contamination >70% …<90% XX 4
Normal operation
Airflow < 0.8 m/s 1LO
Alarm position (immediate release)
Contamination >90% PO
Alarm position (immediate release) 2
Smoke F1
Alarm position (immediate release)
Test or manual release Flashing consecutively for one second
each
CH / 88
(alternating)
Alarm position (immediate release)
System error
see status indi-
cator Ä 18
OFF
No supply voltage off
1) only with activated airflow monitoring
2) triggered by smoke (event or maintenance)
3) Blue LED lights up at air speed < 0.8 m/s
4) Measuring chamber - contamination in %
LED Status off on blinking
Parts and function
RM-O-M Duct smoke detector 17

Status LEDs
Display Operating status Description
XX
Normal operation Measuring chamber - contamination in %
LO LO only applies if airflow <0.8m/s
CH/88
Alarm position
Test function active (test mode)
PO Measuring chamber - contamination with functional impairment
H0 Mainboard defective
H1 Motherboard and extension module not compatible
H2 No communication between mainboard and sensor head
H3 No communication between mainboard and extension module
H5 Supply voltage - overvoltage/undervoltage total system
H6 Sensor head - wrong sensor head (no TROX sensor head)
H7 Sensor head - wrong sensor head
H8 Sesnor head - hardware fault
F1 Smoke detection
Parts and function
RM-O-M Duct smoke detector18

5 Installation
General notes on installation
Fig. 6: RM-O-M Installation positions in horizontal
air ducts
①RM-O-M
②Horizontal air duct
a Distance a = 1/3 H
H Duct height
Note
Recommendations for installation:
–1.5 × H minimum distance between duct
smoke detector and any bends, control units
etc.
–Fit the duct smoke detector in the upper third
of horizontal air ducts (not near a corner).
If structural reasons do not permit this, the duct
smoke detector must be installed in such a way
that safe smoke detection is nevertheless guar-
anteed.
Fig. 7: Fixing holes
①Fixing holes
For mounting, there are 4 mounting holes on
the smoke detector, dimensions:
Ä Chapter
2.1 ‘Dimensions’ on page 9. The RM-O-M may only
be attached to the air duct at the specified mounting
holes, using screws.
CAUTION!
Malfunction of the duct smoke detector
If the casing is damaged, the function of the duct
smoke detector may be impaired.
When carrying out assembly work, proceed care-
fully and do not drill any additional holes in the
casing.
Do not use damaged units.
Installation
RM-O-M Duct smoke detector 19

Prepare air guide profile for mounting
Fig. 8: Installation RM-O-M in horizontal air duct
1. Measure the width (B) or diameter (∅D) of
the air duct.
NOTICE!
Do not shorten the air guide profile on the side
(red insertion marking) that is inserted into the
recess on RM-O-M.
When shortening the air guide profile, a minimum
length of 90 mm must be observed.
2. For B or ∅D < 600 mm: shorten air guide
profile (Fig. 8) to ≈ B or ∅D - 10 mm.
Fig. 9: Air direction arrow end cap
3. Fit the end cap (Fig. 8/2) on the shortened
end of the air guide profile.
NOTICE!
Proper function is not guaranteed without
the end cap in place.
Fig. 10: Insert air guide profile
4. Insert the air guide profile into the duct
smoke detector up to the red insertion mark.
Observe the direction of airflow on the end
cap of the air guide profile Fig. 9.
NOTICE!
Malfunction due to improper installa-
tion
For proper functioning, it is important that
the air guide profile is inserted into the
recess up to the red insertion mark (no
gap between mark and recess).
Installation
RM-O-M Duct smoke detector20