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The design process REAL Alternatives Module 2 Design Differences for Alternative Refrigerants | 27 The design process for ensuring flammable refrigerant systems are safe is summarised below for any system which contains sources of ignition, regardless of the charge size. Step 1.2 Identify sources of ignition within the potentially flammable zone. Step 1.1 Carry out flammable zone testing (area classification) to determine the extent of the potentially flammable zone in the event of a leak. Step 1.3 Option 1 or Option 2 Or Option 3 or Option 4 Move the source of ignition outside the potentially flammable zone. EN60079‐14 (Explosive atmospheres – Electrical installations design, selection and erection) requires that, wherever possible, electrical equipment should be located in non‐hazardous areas. Replace the source of ignition with a suitable device. Increase the air flow and / or maintain a permanent air flow to reduce the potentially flammable zone. Locate the source of ignition in a suitable enclosure (this is usually cost prohibitive for small systems and difficult to achieve). GTZ Hydrocarbon GuidePDF Image | Alternative Refrigerants
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