Haier AB18SC2VHA [8/36] Leak test
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Haier AB18SC2VHA [8/36] Leak test

Haier AB18SC2VHA [8/36] Leak test

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Step 3 Refrigerant Line Connections Step 3 2 Piping Connection Step 3 1 Refrigerant piping connections for the mini split system are made utilizing flare connections Follow standard practices for creating pipe flares When cutting and reaming the tubing use caution to prevent dirt or debris from entering the tubing Remember to place the nut on the pipe before creating the flare Step 3 2 Step 3 3 To join the lineset piping together directly align the piping flare to the fitting on the other pipe then slide the nut onto the fitting and tighten Misalignment may result in a leaking connection Step 3 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 Step 3 1 Table 1 Forced fastening without careful centering may damage the threads and cause a leakage of gas Pipe Diameter 0 Fastening torque Liquid side6 35mm 1 4 18N m 13 3Ftlbs 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 3Ft lbs Step 4 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 4 1 Using a tank of nitrogen with attached regulator charge the system with 150 PSIG of dry nitrogen Use adapter AD87 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 repairand recheck If no leaks are detected proceed to evacuate the system Step 4 1 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 PAGE 8 INSTALLATION

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