Related Manuals for DALEMANS DAX 3F-I
Summary of Contents for DALEMANS DAX 3F-I
- Page 1 STAINLESS STEEL FLAMMABLE GAS DETECTOR DAX 3F-I INSTALLATION, OPERATING AND MAINTENANCE INSTRUCTIONS DAX3FI_MAN01_EN Ver. V1R2...
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Page 2: Approval - Standards
This apparatus is intended for use in explosive atmospheres of hazard- ous areas (zone 1 or 2). The DAX 3F-I is designed to operate as part of a fixed gas detection system and to provide, in association with a suitable control unit, early warnings of flammable gas hazard before gas concentration reaches the Lower Explosive Limit (LEL). - Page 3 Target gas ATEX certificate number Measuring range Notified Body Operating identification code temperature range DAX 3F-I 1026 Remicourt - BE II 2G Ex d e IIC T4 Gas: CH4 II 2D Ex tD A21 IP6X T135°C 100% LEL Tamb: -20°C to +90°C Use: -20..+70°C...
- Page 4 Description The DAX 3F-I is a gas detector designed to detect flammable gas present in ambient air at con- centrations up to 100 % of the Lower Explosive Limit (LEL). It operates using a catalytic sensor which provides a 3-wire mV output signal. The DAX 3F-I detector can be connected to a control unit as part of a Wheatstone bridge measuring circuit.
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Page 5: Sensing Head
Sensing head The sensing element of the DAX 3F-I operates on the principle of catalytic combustion. The sensor consists of a matched pair of elements typically referred to as a passive “P” element and an active “A” element. Both are made of an electrically heated (400 °C) platinum wire coil embedded within a bead. - Page 6 Dimensions 152.5 128.5 Figure 3 : DAX 3F-I mechanical pattern DAX 3F-I...
- Page 7 No additional drilling is allowed on the junction box. The existing openings cannot be enlarged. Possible defective parts must be replaced by original parts delivered by Dalemans only. No additional terminal can be installed on the existing terminal block. The length of the wires of the sensing head may not be modified.
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Page 8: Installation And Commissioning
Should you require any further guidance or assistance please contact Dalemans. Detectors should be readily accessible to permit regular calibration, maintenance and electrical safety inspection. - Page 9 Floor Propane-air ±1.15 Ceiling + floor * This list is not exhaustive. Contact Dalemans for further information. Mounting The detector should be mounted flat on a wall and according to the mechanical pattern given in f i gure 3. Attach the detector to the wall using the original external mounting brackets supplied with the detector or using suitable screws and plugs for direct mounting.
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Page 10: Electrical Wiring
Wiring must comply with local regulations and standards in force and meet the electrical require- ments of the detector DAX 3F-I. Dalemans recommends the use of colour coded cable. The acceptable cross sectional area of the cable is 1.5 to 2.5 mm² depending on the type of sensor used and the distance between the detec- tor and the control unit. For more information about the cross sectional area of the cable and the maximum cable length, please refer to the instruction manual of the control unit. - Page 11 If the external connection is used, the cross sectional area of the bonding conductor should be of at least 4 mm². • Put the cover back in place on the junction box and tighten the four screws. Equipotential Clamping nut bonding connections C : common P : passive A : active WHITE BLUE Figure 7 : Electrical connection DAX 3F-I...
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Page 12: Maintenance
This calibration must be performed according to the procedure given by the manufacturer or his local representative, and in any case by qualified personnel who will have been trained by Dalemans. WARNING! Declassify hazardous area PRIOR to operating maintenance, calibra- tion or service works and check with a portable apparatus that no gas is present in the atmosphere. -
Page 13: Troubleshooting
O U T 0 0 0 0 0 1 1 3 Terminal block - Ex e 3p B O R 0 0 0 0 0 0 8 9 Terminal block for earthing - Ex e B O R 0 0 0 0 0 0 9 1 DAX 3F-I... -
Page 14: Specifications
Specifications MODEL DAX 3F-I Sensing head Sintered metal filter Stainless steel 1.4404 (AISI 316L) Junction box Cable gland Nickel plated brass or stainless steel Dimensions / Weight 166 x 152.5 x 75 mm / 1140 g Sensor type / Signal Catalytic (Pellistor) / 3-wire mV (Wheatstone bridge) Measuring range 0 - 100 % LEL Resolution ± 3 % of measuring range < 60 % LEL ± 5 % of measuring range > 60 % LEL Response time (T90) < 30 sec. Expected operating life span > 2 years... - Page 15 Therefore, to dispose of your end-of-life product, you MUST hand it over to a designated collection point for the recycling of electrical and electronic Equipment. For further information about the collection points in your area, contact your local city office. DAX 3F-I...
- Page 16 OFFICIAL DEALER DALEMANS s.a. rue Jules Mélotte 27 • B-4350 Remicourt Tel.: +32 (0)19 54 52 36 • Fax: +32 (0)19 54 55 34 info@dalemans.com www.dalemans.com...