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All mobile phones and electronics are turned off.
Equipment
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Portable R290 tester
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Vacuum pump
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Dual-head charging meter (mechanical or digital)
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Charging tube
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Needle charging valve
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Refrigerant connection tube
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Electronic scale with a precision of 0.5g
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Cutter
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Sealing pliers x 2
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Magnet
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Refrigerant cylinder. Storage requirements:
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Protect cylinders from direct sunlight
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Place cylinders in vertical position;
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Place cylinders in a well-ventilated place;
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Keep cylinders away from open flame and heat source
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Check the valves for leaks regularly
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