Samon GLACIAR MIDI User manual

GLACIÄR MIDI
Gas Leakage Detector for commercial and industrial applications
USER MANUAL

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1 INDEX
1 INDEX ............................................................................................................................................................................................. 2
2 PRODUCT DESCRIPTIONS............................................................................................................................................................. 4
2.1 INTENDED USES /APPLICATIONS .................................................................................................................................................................... 4
2.2 PHYSICAL DIMENSIONS ................................................................................................................................................................................... 5
3 INSTALLATION............................................................................................................................................................................... 6
3.1 GENERAL INFORMATION................................................................................................................................................................................. 6
3.2 INSTALLATION TIPS .......................................................................................................................................................................................... 6
3.2.1 Equipment rooms........................................................................................................................................................................................................................ 6
3.2.2 Cold rooms .................................................................................................................................................................................................................................. 6
3.2.3 Chillers........................................................................................................................................................................................................................................... 7
3.2.4 Air conditioning - direct VRF/VRV systems........................................................................................................................................................................... 7
3.3 INSTALLATION................................................................................................................................................................................................. 7
Electrical connection ....................................................................................................................................................................................................... 9
3.4 ADDITIONAL INSTALLATION NOTES ................................................................................................................................................................10
4 OPERATION.................................................................................................................................................................................10
4.1 POWER ON ...................................................................................................................................................................................................10
4.2 DEVICE OPERATING STATES............................................................................................................................................................................11
4.3 SETTING THE DEVICE USING THE ROTARY SWITCH .............................................................................................................................................11
Description of the rotary switch LEDs ................................................................................................................................................................................................ 13
Possible configurations ....................................................................................................................................................................................................................... 13
J6 voltage value conversion table / selected function ................................................................................................................................................... 14
4.4 ANALOGUE OUTPUT......................................................................................................................................................................................15
4.5 ALARM MANAGEMENT .................................................................................................................................................................................16
Alarm set points ................................................................................................................................................................................................................................... 16
4.6 MAGNETIC KEY FOR CONFIGURATION ..........................................................................................................................................................17
4.6.1 Bluetooth activation................................................................................................................................................................................................................ 17
4.6.2 Alarm/warning management ............................................................................................................................................................................................. 17
4.7 SAMON GLACIÄRAPP FEATURES ...............................................................................................................................................................18
4.7.1 Connecting the device via Bluetooth ................................................................................................................................................................................. 18
4.8 MODBUS®NETWORK ..................................................................................................................................................................................21
Parameters for RS485 communication selectable via app or rotary switch .................................................................................................................... 21
4.9 TABLE OF MODBUS®VARIABLES .....................................................................................................................................................................22
Function 04 Read Input Registers ...................................................................................................................................................................................................... 22
Function 06 Write Single Register & Function 16 Write Multiple Register .................................................................................................................................. 23
Function 04 Read Input Registers ...................................................................................................................................................................................................... 23
Input register 302 bits......................................................................................................................................................................................................................... 24
Function 05 Write Single Coil & Function 01 Read Coils ............................................................................................................................................... 24
5 MAINTENANCE...........................................................................................................................................................................25
5.1 CALIBRATION PROCEDURE .............................................................................................................................................................................25
5.2 CALIBRATION KIT ...........................................................................................................................................................................................25
5.3 CALIBRATION VIA APP ....................................................................................................................................................................................26
5.4 CALIBRATION VIA MODBUS®COMMUNICATION ..................................................................................................................................................................... 28
5.4.1 Diagram of the calibration procedure............................................................................................................................................................................... 29
5.4.2 Operation of the registers for calibration.......................................................................................................................................................................... 30
5.5 SENSOR REPLACEMENT PROCEDURE .............................................................................................................................................................31
Built-in version...................................................................................................................................................................................................................................... 31
Remote version .............................................................................................................................................................................................................. 31
5.6 CLEANING THE DEVICE ..................................................................................................................................................................................32

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6 FURTHER INFORMATION ...........................................................................................................................................................32
6.1 SENSOR OPERATING PRINCIPLE ......................................................................................................................................................................32
6.1.1 Semiconductor sensors .......................................................................................................................................................................................................... 32
6.1.2 Electrochemical sensors......................................................................................................................................................................................................... 32
6.1.3 Pre-calibrated sensors and devices .............................................................................................................................................. 32
6.2 GAS DETECTED ..............................................................................................................................................................................................33
6.3 TECHNICAL SPECIFICATIONS...........................................................................................................................................................................34
6.3.1 Mechanical specification...................................................................................................................................................................................................... 34
6.4 DISPOSAL OF THE DEVICE ...............................................................................................................................................................................35
6.4.1 Disposal of electrical and electronic equipment............................................................................................................................................................. 35
6.4.2 Disposal of the sensors........................................................................................................................................................................................................... 35
6.4.3 Conformity to standards ............................................................................................................................................................... 35
7 ORDER INFORMATION ..............................................................................................................................................................36
7.1 GAS DETECTOR GLACIÄR MIDI SERIES PART NUMBERS .................................................................................................................................36
7.2 SENSOR ELEMENT PART NUMBERS ................................................................................................................................................................37
7.3 ACCESSORIES ...............................................................................................................................................................................................37

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2 PRODUCT DESCRIPTION
2.1 Intended use / Applications
The GLACIÄR MIDI series leakage detectors continuously monitor indoor air for any refrigerant leaks.The devices can be used for
refrigeration applications (cold rooms, freezer rooms, machinery rooms).
The GLACIÄR MIDI series detectors are available in the following configurations:
• Built-in version
• Remote version
They are calibrated to detect most refrigerants currently available on the market. The sensitive elements are constructed using
semiconductor (SC) technology, infrared (IR) technology, or electrochemical (EC) technology.
The GLACIÄR MIDI series detectors can be used in stand-alone applications or connected to SAMON controllers or third-party devices.
Communication with controllers uses an analogue output, relays, or an RS485 Modbus®serial connection.
When a refrigerant leakage exceeding a programmable concentration threshold is detected, an alarm or warning status is activated, depending
on the level of concentration set, and the GLACIÄR MIDI responds as follows:
• The combination of LEDs that are on changes
• A dedicated internal relay (SPDT) is activated
• The analogue output is controlled (in proportion to the detected concentration)
• The change in status is signalled via the RS485 Modbus® output
Furthermore, the“SAMON GLACIÄR”app, available in both App Store and Play Store, can be used to access the device.
The GLACIÄR MIDI series detectors enable compliance with refrigeration safety standards (e.g., EN 378, ASHRAE 15) through alarms to alert
personnel in the event of a refrigerant leakage.
WARNING: semiconductor sensors detect the gas they have been calibrated for, but are also sensitive to other
types of gases, solvents, alcohol, or substances containing ammonia, such as cleaning products, present in the
environment. This, in certain areas and applications, can lead to false alarms when the substances described
above are present. Nonetheless, although they do not only detect the specific gas, but they also still give a
reliable indication of the concentration of the gas they have been calibrated for.
WARNING:This device is neither certified nor approved for operation in oxygen-enriched atmospheres. Non-
compliance can lead to EXPLOSION.
WARNING:This device has not been designed to guarantee intrinsic safety when used in areas classified as
hazardous (“Directive 2014/34/EU ATEX” and“NFPA 70, Hazardous Location”). For operator safety, DO NOT use it in
hazardous locations (classified as such).
If the equipment is used in a manner not specified by the manufacturer, the protection provided by the
equipment may be impaired.
GLACIÄR MIDI is available in five main versions:
• Infrared version for CO2
• Electrochemical version for Ammonia
• Semiconductor version for R32 refrigerant gas blends
• Semiconductor version for HC refrigerant gases
• Semiconductor version for HFC/HFO refrigerant gases

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2.2 Physical dimensions
Built-in version
Remote version

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3 INSTALLATION
IMPORTANT:the gas detector must only be installed by qualified personnel.
It is recommended to read the manual completely in order to use the product correctly.
3.1 General information
The performance and overall effectiveness of the system strictly depend on the characteristics of the place where the gas
detector is installed. It is therefore necessary to scrupulously comply with and carefully analyse every detail of the
installation process, including (but not limited to) the following aspects:
• local, state and national regulations and standards governing the installation of gas monitoring equipment
• electrical standards governing the laying and connection of power and signal cables to gas monitoring equipment
• all possible environmental conditions that the devices will be exposed to
• the physical characteristics of the gas to be detected (in particular, its specific weight)
• the characteristics of the application (e.g., possible leakages, movement of air, areas where gas may stagnate, high pressure
areas, etc.)
• the accessibility needed for routine maintenance and repairs
• the types of equipment and accessories needed to manage the system
• any limiting factors or regulations that may affect system performance or installations.
IMPORTANT: the installation surfaces must not be exposed to continuous vibrations so as to prevent damage
to the connections and electronic devices.
3.2 Installation tips
CAUTION: THERE IS NO GENERAL RULE for establishing the appropriate number of sensors and
their location for each application. Therefore, the guidelines described below are intended as
support for installers, and not as rules in their own right. SAMON accepts no liability for the
installation of the gas detectors.
3.2.1 Sensor height
Gas type
Mounting height
NH3Ammonia (R-717)
20 cm below ceiling
HFC / HFO / C3H8Propane (R290)
20 cm above the floor
CO2Carbon Dioxide (R744)
20 cm above the floor
3.2.2 Equipment rooms
In equipment rooms, the gas detectors can be installed as follows:
• Position the gas detectors near areas with a high concentration of refrigerant, such as compressors, cylinders, storage tanks,
pipes and conduits. Avoid vibrating surfaces.
• Position the gas detectors near mechanical parts such as pressure reducers, valves, flanges, joints (brazed or mechanical) and
pipes. In particular, above or below these in relation to the type of gas (see below).
• Position the gas detectors around the perimeter of the room, so as to completely surround the equipment.
• Position the gas detectors in all enclosed areas (stairwells, pits, enclosed corners, etc.) where pockets of stagnant gas may
form.
• Position the gas detectors near ventilation air flows, both natural and mechanical (if present).
• Do not place the gas detectors too close to areas with high-pressure gas, to allow this to spread in the space around the gas
detector. Otherwise the device may not detect the refrigerant leak if the flow of gas is too fast.
3.2.3 Cold rooms
In cold rooms, position the gas detectors near the return air flow from the evaporator, ideally on a side wall, but not directly
in front of the evaporator.
Where there are several evaporators, it may be possible to use one gas detector for every two evaporators if their
positioning allows.
Finally, position the gas detectors near mechanical parts or joints such as valves, flanges, and pipes, avoiding areas with
high-pressure gas.

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3.2.4 Chillers
Measuring leaks on outdoor chillers is generally more difficult, given the highly variable air flow.
Generally, it is recommended to install the gas detectors near the compressor, as this is the place where refrigerant leaks
are most likely to occur. In particular, check if it is possible to install the gas detector inside the closed unit near the
compressor, where gas is more likely to stagnate. However, avoid vibrating surfaces or surfaces that are difficult to access
for maintenance.
It is also recommended to install gas detectors along the ventilation system, especially in the event of low or variable air
flow speeds.
3.2.5 Air conditioning - direct VRF/VRV systems
In air-conditioned buildings, it is recommended to install at least one gas detector in each room, identifying the areas of
greatest risk, such as air flows from ventilation systems and heating systems such as radiators.
In these spaces, the refrigerant gas is usually denser than air: consequently, the gas detectors should be installed close
to the floor.
Also consider installing the gas detector in ceilings or false ceilings, if not adequately sealed. Do not install the gas
detectors underneath mirrors/washbasins and inside bathrooms.
Do not install the gas detectors near sources of steam.
3.3 Installation
Once the optimal position to install the sensor has been chosen, it is recommended to install the sensor (identifiable on
the device by the black sensor housing) in a vertical position, with the sensitive element (black part) facing downwards. The
sensor can now be mounted on the wall, as follows:
• Drill the holes in the wall using the measures on the bottom side of the detector (shown in the picture below).
• Fix the device using four screws, chosen according to the type of installation and the type of wall, maximum diameter 4 mm,
minimum length 15 mm and torque 2,5 Nm.
• Fix the remote sensor using one screw, chosen according to the type of installation and the type of wall, maximum diameter
4 mm, minimum length 15 mm and torque 2.5 Nm.

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• Open the cover of the GLACIÄR MIDI, fit the cable glands and make the required electrical connections. The plug-in
terminals can be removed from the device to facilitate wiring.
• Power the device on and complete the settings using the rotary switch, as described in the following paragraphs, or using the
app, as described below or through the Modbus connection.
• Use the cable glands provided to pass through and connect the cables to the terminals, as shown in the figure and in the
connection table below. The terminals can be removed to simplify wiring.
• Close the cover
• Cord range for M16 cable gland 5 - 10 mm, for M20 cable gland 7.5 - 11.3 mm
• Use UL listed approved cable, min. 50°C, suitable for electrical rating in application
• Tighten the cable glands with a toque of 2,5 Nm
• Close the cover.

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Electrical connection
J1
+
Analogue output
G
Analogue output reference
J2
Sh
Shielded RS485 cable
G0
GND for RS485
A
Tx + / Rx + for RS485
B
Tx- / Rx- for RS485
J3
+24
Vac/dc
For Vac power supply, connect the second transformer wire
+24 V
AC/DC
For Vdc power supply, connect one of the two power wires, the device automatically recognizes whether this
is + or GND. For AC power supply, connect one of the two transformer wires.
J4
1A
NO contact for the warning/fault relay
2A
Common for the warning/fault relay
3A
NC contact for the warning/fault relay
J5
1B
NO contact for the alarm relay
2B
Common for the alarm relay
3B
NC contact for the alarm relay
J6
+
V+ for the output voltage provided for service
G
Service voltage reference
J7
/
Built-in version sensor connector
J8
/
Remote version sensor connector (connection not to be used for built-in products)
All external circuits connected to device shall be double or reinforced isolated from mains meet SELV and Limited
energy requirements according to clause 9.4 of UL61010-1 3rd edition.

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• Secure the detector cover with the four screws.
• Power the device on and set the parameters using the “SAMON GLACIÄR” app (see the relevant chapter) if the settings were
not previously made using the rotary switch.
3.4 Additional installation notes
Before commencing electrical installation and wiring, carefully read the following notes:
• Power must be supplied by a safety isolation transformer (Class 2) with no earth connection on the secondary winding.
• The cable for the relays must be sized and fitted with fuses based on the rated voltages, currents, and environmental
conditions.
• If stranded wires are used, it is recommended to use an end terminal.
• To comply with RFI immunity regulations, the communication cable shield on the supervisor must be earthed (e.g., to the
chassis, earth bar, etc.)
• Complete all wiring before powering on.
4 OPERATION
4.1 Power on
When power is connected, the device begins the start-up cycle, divided into two phases:
• start-up
• warm-up
The start-up sequence lasts around 20 seconds, during which the main functions of the gas detector are initialized and
verified. In this phase, the LEDs on the front panel are activated in sequence, and the device cannot yet be used.
At the end of the start-up sequence, the warm-up phase commences, during which the sensor output signal is adjusted
and stabilized. In this phase, the device can be used to detect gas and installation can be completed via the rotary
switch, app or controller; nonetheless, the measurement is less reliable, and calibration is not possible.
During the warm-up phase, the green LED flashes around twice every second. The duration of the warm-up phase
depends on the sensor technology used:
• Semiconductor = 5 min
• Electrochemical = 5 min
• Infrared = 2 min
The duration of the warm-up phase may also vary according to environmental conditions. In this phase it is important not
to cause sudden changes in gas concentration, so as to avoid compromising correct measurement by the sensor.
IMPORTANT: the sensors may take longer to warm up than specified; in these cases, do not take any action,
wait for the device to stabilise. The time needed for complete stabilisation of the device may vary from 2 hours
(minimum time) to 24 hours (recommended time).