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Seitron COOL GUARDIAN Use And Maintenance
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Seitron COOL GUARDIAN Use And Maintenance

Refrigerant gas detector
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USE AND MAINTENANCE
C O O L G U A R D I A N
REFRIGERANT GAS DETECTOR

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Summary of Contents for Seitron COOL GUARDIAN

  • Page 1 USE AND MAINTENANCE C O O L G U A R D I A N REFRIGERANT GAS DETECTOR...
  • Page 3 Example of logic diagram of connecting loads to the transmitter with separate power supply Mechanical Installation - Closure COMMISSIONING BUTTON FUNCTIONALITY STATE DIAGNOSTIC LED SEITRON GUARD APPLICATION Installing and Starting the Seitron Guard App 9.1.1 Configuration menu 9.1.2 Details 9.1.3 Output test 9.1.4 Output Calib. (Analog Output Calibration) 9.1.5 Bump 9.1.6 Gas Calib.
  • Page 4 SR00000000SE 043629 210524...

  • Page 5: About This Manual

    IMPORTANT INFORMATION About this manual ◊ This manual describes the features, operation, and maintenance of the Cool Guardian gas detector. ◊ Read this operation and maintenance manual before using the instrument. The operator must be familiar with the manual and follow its directions carefully. ◊ This operation and maintenance manual is subject to change as a result of technical improvements-the manufacturer assumes no responsibility for any content or printing errors. Respect your environment, think before you print the full manual. Safety Warnings. WARNING! Read the information carefully and set up appropriate measures to ensure safety so as to avoid any danger to people and property.

  • Page 6: Security Check

    Prohibited Use of the Product The use of Cool Guardian in application areas other than those mentioned in paragraph 2.2 “Permitted Use of the Product” is at the operator’s risk, and the manufacturer assumes no responsibility for any loss, damage, or costs that may result. The product is not certified or approved for operation in oxygen-enriched atmospheres, as this could cause personal injury or death. The product is not designed to be used in hazardous environments and does not provide intrinsic safety in such situations. Cool Guardian must not be used in classified Ex zones. Do not use the following substances in the immediate vicinity of the device: - alcohol, gasoline - solvents and thinners - adhesives, paints, and silicone products - cleaning detergents - perfumes - sprays in general...

  • Page 7: Product Description

    In conclusion, a refrigerant gas detector is a crucial tool for industries managing refrigeration systems. By utilizing this instrument, companies can prioritize worker safety, protect the environment, optimize operational efficiency, and comply with regulatory requirements. Investing in a refrigerant gas detector is a wise decision that can prevent potential hazards, minimize costs, and promote the sustainability of the sector. The main features for this product are: - Designed to detect refrigerant gas leaks in the environment for which it is calibrated (see marking on device for gas type and flow rate). - Compact design, making it easy to fix on the wall. - The sensor of the detector is positioned on the cover. - Configurable analog output via the Seitron Guard App (4-20 mA / 0-10 Vdc). - Three relay outputs for Alarm and Fault indications. - RS-485 interface for communication with Modbus® RTU protocol (up to 32 detectors can be connected). - Integrated acoustic and visual alarms to comply with refrigeration regulations. - The Seitron Guard mobile app (available for Android and iOS) allows users to interface via Bluetooth® with the gas detector to facilitate device commissioning, configuration, and maintenance. Main functions: - Continuous monitoring of the surrounding environment for the presence of refrigerant gases. SR00000000SE 043629 210524...
  • Page 8 Components The instrument is equipped with a user interface consisting of: one multicolor LED, one buzzer, two magnetic switches, and Bluetooth communication. COMPONENTS DESCRIPTION Sensitive Element. Multicolor LED for transmitter status indication. Wall mounting screw locations. Screws for access to internal parts of the product. Magnetic button “A”. Magnetic button “B”. Power terminals (x2). Configurable analog output terminals 4-20 mA / 0-10 V via the Seitron Guard App. Relay 1 (voltage-free changeover contacts): Alarm 1 threshold. Relay 2 (voltage-free changeover contacts): Alarm 2 threshold. Relay 3 (voltage-free changeover contacts): Alarm 3 threshold. RS-485 port terminals with Modbus® RTU protocol (x2). Buzzer for acoustic signaling. Tactile button “SW1” (corresponding to magnetic button “A”). Tactile button “SW2” (corresponding to magnetic button “B”). Flat cable connection to the sensor. Rubber gasket. M16 cable glands (x8) for cable entry, with corresponding plugs included (x8). SR00000000SE 043629 210524...

  • Page 9: Technical Features

    TECHNICAL FEATURES Power Supply Voltage: 12 .. 24 Vac ±10% or 12 .. 24 Vdc ±10% Power absorption: Relay Outputs: Contact Rating: 3 x 1A 30 Vac (voltage-free). Analog Output: 4-20mA / 0-10 Vdc / 1-5 Vdc / 0-5 Vdc / 2-10 Vdc configurable via Seitron Guard App. Communication Port: RS-485 with Modbus® RTU protocol. Up to 32 devices connectable. Frequency: 2.4 .. 2.5 GHz Modulation: DSSS / OFDM / MIMO-OFDM Max. Transmitted RF Power: <100 mW Buzzer: 100 dB @10 cm Detected Gas: Refer to detector marking. Full Scale: Refer to detector marking. Sensor Warm-up Time: Dependent on sensor type (minimum 3 minutes). Protection Rating: IP65 (with cables / plugs inserted into cable glands). Operating Temperature*: -40 .. +50 °C Operating Humidity: 20% .. 90% RH (non-condensing). Operating Pressure Range: 800 .. 1100 hPa STORAGE Temperature: -40 .. +50 °C Humidity: 20% .. 90% RH (non-condensing). *: The actual operating temperature depends on the type of sensor used to detect the target gas. Dimensions...

  • Page 10: Installation

    INSTALLATION General Information To securely mount the transmitter on a wall, use appropriate accessories such as screws and wall plugs suitable for the mounting surface. Ensure that the transmitter’s cover part with the roof is facing upwards to protect the sensor from potential dust buildup. When considering the functional performance of the device, it’s important to carefully plan the placement of transmitters within the environment being monitored. Pay special attention to: • Possible openings in walls and ceilings and air currents • Composition and shape of the environment • Size of the area to be protected • Accessibility required for maintenance • Gas density (whether heavier or lighter than air) • Gas emission rate (flow) The sensor’s response time is closely related to its position in the environment and the type of gas being detected. For gases to be detected, it’s necessary to assess their relative density to air and position the transmitter accordingly. CAUTION During the electrical connection phase, DO NOT let the cover/sensor hang from the flat cable. Doing so could damage the product.

  • Page 11: Electrical Connections

    • Do not use the same conduit for signal and power cables. The detector is normally powered by a power supply with output at 12-24 Vdc / 12-24 Vac, with a possible backup system. The analog output, terminals 16 and 17, can only be configured via the Seitron Guard App. The detector leaves the factory with the analog output configured in 4..20 mA mode.
  • Page 12 Creating an RS-485 Network This section provides instructions for wiring a network of devices using the RS-485 interface with Modbus® RTU communication protocol. Address configurations, baud rate, and parity settings can be set exclusively via the Seitron Guard app. RS-485 CONNECTION CABLES RS-485 network connections must be made with twisted and shielded pair cables with characteristics equivalent to BELDEN 9841 or BELDEN 9842 cables, as indicated in the following table: RESISTOR IN DC NOMINAL CAPACITY NOMINAL BETWEEN BETWEEN TYPE NO. COUPLES. IMPEDANCE...

  • Page 13: Wiring Diagram

    Wiring diagram Example of implementing an RS-485 network with a 12 Vdc power supply, backup battery, and 3 transmitters BATTERY PC/PLC SH GND A A GND SH SH GND A A GND SH SH GND A A GND SH POWER SUPPLY 12Vdc Vin AC/DC Vin AC/DC...
  • Page 14 - Analog output (in case the analog output is used) - Manual gas calibration (if the App is not used for sensor calibration) - Manual bump (if the App is not used for performing the sensor Bump test) - Analog output calibration (if the analog output is used) For all details, see section “9.0 SEITRON GUARD APPLICATION”. 3. After completing the installation and configuration, the manufacturer requires performing a Bump test to verify the device’s functionality. If the Bump test fails, it is necessary to proceed with the gas sensor calibration. For all details regarding the execution of the Bump Test and Calibration, see the Quick Start Guide.

  • Page 15: Button Functionality

    BUTTON FUNCTIONALITY The following table summarizes the functions of the magnetic buttons “A” and “B”: The magnetic buttons “A” and “B” are activated by bringing the magnet, supplied with the calibration kit ACKC01, close to their respective locations. The table shows the activation times for the functions, indicated by the LED lighting up in a specific color, starting from the initial condition of the LED being solid green. LED (solid) Activation of Bluetooth for pairing with the App. 1 < .. < 5 s White ® Deactivation of Bluetooth if previously activated. 5 < .. < 10 s Yellow ® Starting Bump test from the transmitter, measurement acquisition in progress. 1 < .. < 5 s White Automatic exit for result.
  • Page 16 STATE DIAGNOSTIC LED The device communicates with the user through a multicolored LED and a buzzer, which indicate the various states of the detector and the possible activation of alarm and/or fault relays. Below is a summary table with the combinations of all possible LED states, buzzer, and relay outputs: STATUS OUTPUTS BUZZER RELAY 1 RELAY 2 RELAY 3 Sensor warm up Green 1 blink/s Measure Solid green on Bluetooth activated Solid green on ON 1 beep / s App connected Blue 1 blink/s...

  • Page 17: Configuration Menu

    Installing and Starting the Seitron Guard App See what is stated in the quick start guide. Each device is identified by a unique MAC code, which appears when pairing the transmitter with the Seitron Guard App or on the Home screen. Only one transmitter can be connected to the App at a time.
  • Page 18 Enabled: If the relay is activated, it remains activated even if the triggering event is removed, meaning the relay is ‘latched’. To reset the relay, refer to the table in Chapter 7.0 BUTTON CONFIGURATION. Disabled (default): If the relay is activated and subsequently the triggering event disappears, the relay returns to its previous state, meaning the event is not stored. Alarm/Buzzer Delay: It is possible to set a delay time (in minutes) for signaling the alarm through the LED and the buzzer in case the alarm threshold is exceeded (either the first or second threshold). This is...
  • Page 19 Analog output configuration Set the signal to be applied to the analog output of the transmitter. Once the output has been set, it is necessary to press the “Save” button (at the bottom of the page) to save the change and update the data shown in the next menu “Output Setting”. Select from: 4 - 20 mA (Default) 0 - 10 V 1 - 5 V 0 - 5 V 2 - 10 V Analog output setting configuration Sets the limit of Zero (minimum) and Span (maximum) relative to the sensor reading interval associated with the analog output. Limit: Auto: Limits are set automatically according to the sensor (data cannot be changed). Manual: Limits can be changed according to the needs of the installation. Limit Zero: Minimum sensor reading limit associated with minimum analog output limit (in the example 0 ppm is associated with 4 mA). Limit Span: Maximum sensor reading limit associated with maximum analog output limit (in the example 10000 ppm is associated with 20 mA).

  • Page 20: Output Test

    9.1.2 Details This screen summarizes all the information about the transmitter and its sensor. Calibrated Calibrated 9.1.3 Output test In this screen you can manually check each individual signal from the transmitter. For this purpose, activate/deactivate the switches and observe the corresponding output turn on or off on the device. Example: Clicking on the switch related to the Red LED verifies on the connected transmitter that the LED has actually turned on red. SR00000000SE 043629 210524...
  • Page 21 9.1.4 Output Calib. (Analog Output Calibration) The transmitter generates an analog output signal in voltage or current, according to the configured settings. Calibrating the analog output of the transmitter is important to ensure accurate and reliable performance, as it corrects any inaccuracies caused by various hardware factors. In this menu, you can perform zero adjustment to correct any inaccuracies at the minimum value (4 mA or 1 V) and span adjustment to correct any inaccuracies at the maximum value (20 mA or 10.5 V). Procedure: 1. Connect a multimeter to the analog output of the transmitter (terminals 16 and 17) or to the terminals of the connected load. Multimeter Analog output 2. Accessing the “Analog Output Calibration” screen, the Zero adjustment is selected. Read the output value on the multimeter; if it does not match the expected value indicated in the “Zero Adjust” row, proceed with the adjustment using the two arrows until the expected value is read on the multimeter. Once the Zero adjustment is complete, press “Save Zero“. SR00000000SE 043629 210524...
  • Page 22 3. By pressing the yellow dot, you move to the Span adjustment. Read the output value on the multimeter; if it does not match the expected value indicated in the “Span Adjust” row, proceed with the adjustment using the two arrows until the expected value is read on the multimeter. Once the Span adjustment is complete, press “Save Span”. SR00000000SE 043629 210524...
  • Page 23 9.1.5 Bump This menu allows to configure and perform the sensor Bump test. The Bump test is an essential procedure in order to verify the device correct operation. For the Bump test procedure refer to what is described in the Quick Start Guide. DESCRIPTION Code of the sensor installed on the transmitter. Gas concentration in ppm detected in real time by the sensor. Information on sensor status and date of the last bump test performed. Gas concentration threshold for bump test, set by the user. Fill in the details related to the gas cylinder in use: Gas: Name of the gas Concentration: Gas concentration Certification N.: Gas cylinder certificate number Accuracy: Gas preparation uncertainty Expiration date: Cylinder expiration date This side of the screen shows the procedure for performing the Bump test. Starts the sensor bump test. Once the Bump test is successfully completed, it is possible to view the report. If the Bump Test is successfully completed it can share the report.
  • Page 24 9.1.6 Gas Calib. This menu allows to set and perform the sensor calibration. For the actual performance of the sensor calibration refer to what is described in the Quick Start Guide. DESCRIPTION Code of the sensor installed on the transmitter. Real-time gas concentration in ppm detected by the sensor. Information on the sensor status and calibration expiration date. Fill in the details related to the cylinder used for Zero calibration: Gas: Name of the gas Concentration:...

  • Page 25: Additional Menus

    9.1.7 Additional menus Pressing the button “ “ it is possible to access the additional section menu of the Seitron Guard App. Status: Ok Calibration expiration date: Calib. Gas Calib. Analog Output Bump Output Test Configuration Details Unpair Sensor replacing Once the transmitter sensor is replaced, through this menu the device acquires all the data of the newly installed sensor. Once all the listed points are performed, pressing the “Replace” button the new sensor dare will be acquired and the old one will be erased. SR00000000SE 043629 210524...
  • Page 26 Feedback In this screen it is possible to send a feedback to the Seitron service center in order to report an issue of the App. Please follow what is shown on the relevant screen: About This page lists the data about the installed App version and the manufacturer’s contacts. SR00000000SE 043629 210524...

  • Page 27: Maintenance

    For performing the bump test and sensor calibration, refer to the quick start guide. 10.1 Cleaning The transmitter cover has a hood designed to protect the sensor from dust buildup. It’s essential to clean the equipment regularly to prevent dust layers exceeding 5 mm. Use only a soft cloth dampened with water to clean the device. Do not use solvents, soaps, or polishing products. 10.2 Sensor End-of-Life From the date the transmitter is first activated, the countdown for the sensor’s operating hours begins. Seitron guarantees the sensor’s proper functioning for up to 5 years of operation from the transmitter’s initial use. Once the expected operating hours are reached, the transmitter will notify the user that the sensor needs to be replaced. 1. Da trasmettitore: il LED lampeggia di colore verde (2 lampeggi al secondo) e si attiva il RELE’ 3. 2. Da App Seitron Guard: nella schermata di home, compare la scritta “Fine vita del Sensore”. SR00000000SE 043629 210524...

  • Page 28: Sensor Replacement

    10.3 Sensor replacement If the sensor installed on the transmitter needs to be replaced, proceed as follows. WARNING! - The sensor replacement must be performed by qualified personnel. - Disconnect the power from the device before performing the replacement. 1. Access the internal parts by unscrewing the 6 screws of the cover. 2. Disconnect the flat cable from the sensor. FLAT CABLE CONNECTOR 3. Remove the sensor from the transmitter cover by turning the sensor to the left until it slides off. 4. Check that the O-ring is present in the appropriate seat of the cover; if in removing the sensor the O-ring has come out of the seat, it needs to be repositioned (see image). SR00000000SE 043629 210524...
  • Page 29 5. Insert the new sensor, following the reverse order of the previously described steps (steps 4 - 3 - 2). 6. Place the rubber gasket on the base of the transmitter. Ensure the gasket is correctly positioned, aligning the 4 holes of the gasket with the 4 pins on the base of the product. 7. Make sure no cables interfere with the sensor module and close the cover. 8. Reattach the six screws that secure the cover. IMPORTANT To achieve proper sealing, the cover screws must be tightened to 15-20 lbf in (1.5-2.0 Nm). 9. Pair the Seitron Guard App with the transmitter and access the “Sensor Replacement” menu: Status: Ok Calibration expiration date: Calib. Gas Calib. Analog Output Bump Output Test Configuration Details Unpair After completing all the listed steps, pressing the “Replace” button will acquire the data from the new sensor and delete the old sensor’s data. SR00000000SE 043629 210524...

  • Page 30: Spare Parts

    11.0 SPARE PARTS The only available replacement parts are pre-calibrated sensors, ready to be replaced on the transmitter. The sensor code to purchase is displayed on the home screen or in the “Details” menu of the Seitron Guard App: Status: Ok Calibration expiration date: Calib. Gas Calib. Analog Output Bump Output Test Configuration Details Unpair 12.0 WARRANTY The user is guaranteed against the product’s defects of conformity according to European Directive 2019/771 as well as the Seitron warranty terms, available online on the website www.seitron.com. We invite the user to visit our website and check the latest version of technical documents, manuals and catalogs. SR00000000SE 043629 210524...
  • Page 31 SR00000000SE 043629 210524...
  • Page 32 Seitron S.p.A. a socio unico Via del Commercio, 9/11 - 36065 - MUSSOLENTE (VI) ITALY Tel. 0424.567842 - info@seitron.it - www.seitron.com...