primatech Prefer User Manual

Methane gas (ch4 ) detector

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Methane Gas (CH ) Detector

User's manual

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Page 1 Methane Gas (CH ) Detector User’s manual...
Page 3 Methane Gas (CH ) Detector WARNING! Please read the manual carefully before you install the detector. Failure to follow the instructions will lead to loss of warranty. For technical support please contact PRIMATECH representatives.
Page 4: Limited Warranty
24 months. If defective in original materials or workmanship and returned, delivery costs prepaid, PRIMATECH SRL will repair or replace this product free of charge. LIMITS OF WARRANTY...
Page 5 INDEX INTRODUCTION Ÿ TECHNICAL SPECIFICATIONS Ÿ DIMENSIONS Ÿ POSITIONING Ÿ INSTALLATION Ÿ ELECTRICAL CONNECTIONS Ÿ WALL MOUNTING Ÿ OPERATION Ÿ TESTING Ÿ MAINTENANCE INSTRUCTIONS Ÿ DETECTOR LIFETIME Ÿ WARNINGS Ÿ REFERENCE STANDARDS Ÿ DISPOSAL Ÿ QUICK INSTALLATION GUIDE Ÿ WARNING! The detector should be installed by qualiﬁed personnel only.
Page 6 INTRODUCTION The PREFER methane gas detector is calibrated to start alarming before a level of 9% LEL of the detected gas is reached. The LEL (Lower Explosion Limit) of the gas deﬁnes the minimum ratio of gas volume or combustible vapors in the air in which an explosive atmosphere will form.
Page 7 Detectors have limitations. Just like any other electronic devices, gas detectors are not insured against handling mistakes. They have a limited lifetime. You should test the gas detector monthly. If your gas detector turns out not to function properly, or the self-test indicates improper functioning replace the device immediately (see chapter on “Testing”).
Page 8: Technical Specifications
TECHNICAL SPECIFICATIONS Sensor: Semiconductor Power Supply: 230 V AC (-15% +10%), 50/60 Hz Power Absorbed: 4 VA Detected Gas: Methane Sensitivity: 3% - 20% LEL Alarm Set Point: 9% LEL Initial Delay Time: 2 min 30 sec Indicators: -Green LED: Operation -Bicolor LED: Red: Visual Alarm...
Page 9 DIMENSIONS Alarm/Fault Test Reset Gas Detector 93 cm...
Page 10 POSITIONING WHERE TO INSTALL THE METHANE GAS DETECTOR The gas detector should be installed in the room where a gas leak is most likely to occur. This may be the kitchen because of the presence of a gas cooker and other gas appliances. The gas leaks, lighter than air, tend to rise and ﬁll all the volume above the level of the leak.
Page 11 WHERE NOT TO INSTALL THE METHANE GAS DETECTOR Safety concerns in installing the methane gas detector The detector should not be installed:- in an enclosed space (e.g. in a cupboard or behind a curtain);- directly above a sink;- in areas with great circulation of air, where ventilations are installed, or next to a door or window;...
Page 12: Installation
could be aﬀected on short and long term, the detector should not be installed in areas where emissions of paint solvents can appear, or near heating systems, stoves or ﬁreplaces, or near exhausted gases of automobiles. Vapors of cleaning liquids, varnishes, paints, vapors from kitchen activities can aﬀect the operation of the detector and can cause false alarms and malfunctions of the detector.
Page 13: Electrical Connections
Your PREFER Methane Gas Detector can be wall mounted. Note: It is very important to install the detector in the correct position. First, see “Where to install the methane gas detector” paragraph for general guidelines as to where to locate your gas detector.
Page 14 1) Connection of a detector to the solenoid valve - Connect position COM to terminal 2 of the solenoid valve’s connector; - Connect position N to terminal 1 of the solenoid valve’s connector; - Make a grounding connection to terminal 3 of the solenoid valve’s connector;...
Page 15 WARNING! When the detector is powered on, a short period of time (2 min 30 sec) is necessary for the stabilization of the gas sensor. 2). PREFER Master and PREFER Slave NOTE: These versions are available for parallel connection. These conﬁgurations allow a very easy installation of the apparatus.
Page 16 1. If the jumpers JMP1(connection between position 1 and 5 of the internal connector) and JMP2 (connection between NO and L position) are active, the detector is MASTER type. 2. If the jumpers JMP1 and JMP2 are inactive, the detector is SLAVE type. Follow the installation diagram below: - Connect positions NO of the internal connectors;...
Page 17: Wall Mounting
WALL MOUNTING WARNING! Before mounting the detector make sure the device is not powered. The detector is supplied with double side adhesive band for wall mounting. Also, two screws can be used (Φ4x26 mm screws recommended) and two plastic anchors. Detach the protection foil of the adhesive band from the back side of the plastic base and press it fermly on the wall...
Page 18: Operation
PREFER is a methane gas leak detector for domestic premises. In order to ensure real safety, a gas detector must be coupled with a solenoid valve capable of blocking the gas ﬂow.
Page 19 characteristics of the sensitive element, the sensor will operate properly for a period of 5 years starting with the date of activation. LEDs: - GREEN LED (ON): power on. - Bicolor LED-RED ( Alarm): detector in alarm status.An acoustic warning signal is issued and the relay is switched.
Page 20: Maintenance Instructions
TESTING WARNING! DO NOT USE A CIGARETTE LIGHTER TO TEST THE ALARM. Simply press the Test/Reset button any time while in normal operation. The bicolor LED lights up RED, the alarm sounds and the relay activates the solenoid valve which cuts oﬀ the gas ﬂow. Release the button and manually rearm the solenoid valve.
Page 21 Never use detergents or solvents to clean the detector. Chemicals can permanently damage or temporarily contaminate the sensor. Avoid spraying air fresheners, hair spray, paint or other aerosols near the detector. Do not paint the detector. Paint will seal the vents and interfere with proper sensor operation.
Page 22: Reference Standards
WARNING WARNING! In case of an alarm the user should carry out the following actions, not necessarily in this order. - Do not switch on or oﬀ any electrical equipment, including gas detection apparatus. - Extinguish all naked ﬂames, including all smoking materials.- Turn oﬀ all gas appliances.- Turn oﬀ...
Page 23 DISPOSAL Packaging materials - The packaging materials are recyclable.- Please dispose of packaging materials in an appropriate container at your local recycling center. Old appliances - Waste electrical products should not be disposed of with household waste. Therefore, please participate in protecting natural resources and the environment, by disposing of these products at a disposal center for recycling electrical and electronic devices.
Page 24 B - Parallel connection of more than one detector per solenoid valve WARNING! The device must be installed by qualiﬁed personnel only. Before any intervention, disconnect the power and make sure that the device IS NOT POWERED. SLAVE SLAVE MASTER N COM NO L N COM NO L N COM NO L...
Page 25 WARNING! DO NOT DISASSEMBLE THE SOLENOID VALVE unless there is not enough space for it to be threaded to the pipe as a whole. Do not disassemble at the hexagonal section! Disassembling the solenoid valve at the hexagonal section will aﬀect the reset system.
Page 26 WARNING! Install the solenoid valve in an area that is protected from rain and moisture. WARNING! The solenoid valve should be installed only by qualiﬁed personnel. Read the solenoid valve’s instructions carefully before installation. If in order to connect the solenoid valve to the pipe the solenoid valve must be disassembled take note of the following...
Page 28 For more informations, please visit us at: www.iprefer.ro In the view of a constant development of their products, the manufacturer reserves the right to change technical data and features without prior notice. M-DM-PRF 0618 (EN)