SERVOTOUGH FluegasExact 2700 MiniPurge Installation Manual for Class 1 Div 2
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SERVOTOUGH FluegasExact 2700 MiniPurge Installation Manual for Class 1 Div 2 - 1

Mini-Z-Purge 07 1ZCF/SS/WM/D811 ML 514 (Servomex Purge Controller 02760703) 1. Specification Sheet 2. Application Suitability 3. Description and Principle of Operation 4. Installation of the System 5. Commissioning 6. Maintenance of the System 7. Fault Finding 8. Glossary 9. Drawings 10. Reference Manual ML 514 v6

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SERVOTOUGH FluegasExact 2700 MiniPurge Installation Manual for Class 1 Div 2 - 2

1. Specification Sheet Model No. Purge System Type Additional Number: Given to System to indicate that Purge System is a special build. Options as Required Approval / Certification WM = Wall Mounting Bars USA/CANADA NFPA496 CSA 2578918 Class I Div 2 Groups A, B, C & D Outputs IS = Internal Switches “Alarm”: Dry, VFC, SPST N/O Contact suitable for Non-incendive circuits 0.5 A @ 120 Vac 1 A @ 30 Vdc For limitations and conditions of use refer to the applicable certificate. Pressurization Method CF = Continuous Flow MiniPurge Housing SS = 316L Stainless Steel Supply Pressure: Must be...

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SERVOTOUGH FluegasExact 2700 MiniPurge Installation Manual for Class 1 Div 2 - 3

En Organisation of this manual This manual covers the 07 1ZCF/SS/IS/WM D811 (Servomex Purge Controller 02760703) from the Expo range of MiniPurge systems. If a pressurized enclosure and/or MiniPurge Interface Unit (MIU) are supplied under the same order as this MiniPurge system, drawings, specification sheets and certification for these products will be found as individual manuals. This manual must be read in conjunction with Servomex Installation Manual 02700005D. 2. Application Suitability Purge systems may be used for hazards of certain gas groups, refer to Specification Sheet. Apparatus...

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SERVOTOUGH FluegasExact 2700 MiniPurge Installation Manual for Class 1 Div 2 - 4

En 6.4 mbarg then the purge flow through the sensor head would be below 3 l/min and the purge flow rate would be inadequate, causing an alarm condition. The purge flow can be manually adjusted using the flow control valve. Adjustment of the flow control valve will increase or decrease the flow which must be achieved to satisfy the requirement of the differential sensor. If there is a blockage in the system this will cause the Relief Valve situated before the outlet to the sensor head to measure a pressure higher than 100 mbarg, this will cause the Relief Valve to open and relieve the...

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SERVOTOUGH FluegasExact 2700 MiniPurge Installation Manual for Class 1 Div 2 - 5

En Purge exhaust. The purge air return line exists as a means to test that the flow rate through the pressurized enclosure is greater than 3 l/min. Returned purge air is then vented inside the control unit from the spark arrestor unit that is fitted in the unit. This spark arrestor is not to be modified, adjusted or obstructed in any way as this will disrupt the orifice back pressure. Power supplies and their isolation All power entering the pressurized enclosure shall be provided with a means of isolation. This requirement also applies to any external power sources, which are connected to...

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SERVOTOUGH FluegasExact 2700 MiniPurge Installation Manual for Class 1 Div 2 - 6

En 2.2 barg as factory set for normal operation but may be adjusted as described in steps 6 & 7 if required. 1. Before connecting instrument air or inert gas to Minipurge unit the pneumatic supply line should be fully blown through. Disconnect the supply pipe from the inlet to the MiniPurge system and blow it through for at least 10 seconds per metre (3ft) of supply length from the known clean instrument air connection point to remove any debris or condensation that may be contained within the supply line. 2. Connect a temporary pressure gauge or water manometer to the MiniPurge system...

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SERVOTOUGH FluegasExact 2700 MiniPurge Installation Manual for Class 1 Div 2 - 7

7. Adjust the Flow Control Valve so that the purge return pressure is at 10.0 mbarg. (± 1 mbarg). This is the recommended setting for the purge return pressure in normal operation. If 10.0 mbarg cannot be achieved with the Flow Control Valve fully opened it is permissible to adjust the pressure regulator to a maximum of 2.5 barg for normal operation. If this adjustment is required the new pressure set point for the regulator should be noted in the manual and marked inside the MiniPurge® compartment for future reference. The flow control valve should be locked at its set position by use of...

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SERVOTOUGH FluegasExact 2700 MiniPurge Installation Manual for Class 1 Div 2 - 8

6. Maintenance of the System Maintenance of the system The maintenance recommended for the system consists of the following items, supplemented by any additional local requirements imposed by the local Code of Practice. Expo recommends that the commissioning tests be repeated at least every six months. In addition the following checks are also recommended at that time: • • Check the Spark Arrestors. Remove all debris & corrosion, if replacement is required consult Expo. Check the condition of the air supply filter element. Clean if necessary. At least every two years check the following...

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SERVOTOUGH FluegasExact 2700 MiniPurge Installation Manual for Class 1 Div 2 - 9

7. Fault Finding Pressurized/Purging indicator will not turn green during start up Replace pipe work Is the air supply pressure incorrect? Check the air supply pressure at the inlet to the MiniPurge is stable between 4 - 8 Barg / 60 - 115 psi Any significant leakage must be corrected. Check for leaks down the cables or conduit. Ensure leakage does not exceed 3 l/min (0.1cfm) Is the supply pipe to the air inlet as least 6mm OD? Is there excessive leakage from the PE? Is the Pressure / Flow Sensor out of calibration or faulty? The basic operation of the Pressure Sensor can be checked by...

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SERVOTOUGH FluegasExact 2700 MiniPurge Installation Manual for Class 1 Div 2 - 10

Description Alarm and trip Alarm only Continuous flow Control unit Flow control valve Canadian Standards Association Intrinsically safe MiniPurge Interface Unit Pressurized Enclosure (2720 Sensor Head) Pneumatic output Relief valve Spark arrestor universal Drawing number Sub Mini-Z-Purge for Servomex D811 Circuit Diagram 10. Reference Manual NFPA 496 Manual ML383

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SERVOTOUGH FluegasExact 2700 MiniPurge Installation Manual for Class 1 Div 2 - 11

SERVOMEX LOGO APPROVED DATE Expo Technologies Limited SURREY TW16 5DB UNITED KINGDOM The contents of this drawing / document are Copyright © Expo Technologies Limited. They are to be treated as confidential and are returnable upon request. They are not to be copied or communicated in part or in whole without written consent from Expo Technologies Limited, neither are they to be used in any way against our interests. NOTES: 1. APPROX WEIGHT 7.5 Kg [16.5 Ib]. 2. BRACKET DIMENSIONS IN INCHES. 3. FULL PART NUMBER FOR SYSTEM IS 07_1ZCF/SS/IS/WM/D811 4. ENCLOSURE MATERIAL/FINISH: STAINLESS STEEL...

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