Haier 1U18LC2VHA [8/42] Leak test
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Haier 1U18LC2VHA [8/42] Leak test

Haier AB18SC2VHA [8/42] Leak test

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Step 2 3 Two wrenches are required to join the flare connections one standard wrench and one torque wrench See Table 1 for the specific torque per piping diameter Forced fastening without careful centering may damage the threads and cause a leakage of gas Pipe Diameter é Fastening torque Liquid sides 35mm 1 4 18N m 13 3Ft lbs Liquid Gas side9 52mm 3 8 42 N m 30 1Ft lbs Gas side 12 7mm 1 2 55N m 40 6Ft lbs Gas side 15 88mm 5 8 60 N m 44 3Ftlbs Step 2 3 Table 1 Step 3 Leak Test and Evacuation Leak Test Hazard of Explosion Never use an open flame to detect gas leaks Explosive conditions may occur Use a leak test solution or other approved methods for leak testing Failure to follow recommended safe leak test procedures could result In death or serious injury or equipment or property damage Step 3 1 Step 3 2 Use only dry nitrogen with a pressure regulator for pressurizing unit Do not use acetylene oxygen or compressed air or mixtures containing them for pressure testing Do not use mixtures of a hydrogen containing refrigerant and air above atmospheric pressure for pressure testing as they may become flammable and could result in an explosion Refrigerant when used as a trace gas should only be mixed with dry nitrogen for pressurizing units Failure to follow these recommendations could result in death or serious injury or equipment or property damage Step 3 1 Using a tank of nitrogen with attached regulator charge the system with 150 PSIG of dry nitrogen Use adapter AD 87 field supplied to connect to the valve Check for leaks at the flare fittings using soap bubbles or other detection methods If a leak is detected repair and recheck If no leaks are detected proceed to evacuate the system System Evacuation Step 3 2 Attach a manifold gauge micron gauge and vacuum pump to the suction line port using adapter AD 87 field supplied Illustration 5 Evacuate the system to 350 microns Close the vacuum pump valve and check the micron gauge If the gauge rises above 500 microns in 60 seconds evacuation is incomplete or there is a leak in the system If the gauge does not rise above 500 microns in 60 seconds evacuation is complete U LU W PAGE 8 INSTALLATION Illustration 5

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