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