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Tighten fittings using 2 wrenches. 6. When connecting regulator assembly to the tank valve, hand tighten black QCC1 nut clockwise to a positive stop. DO NOT use a wrench to tighten. Use of a wrench may damage the quick closing coupling nut and result in a hazardous condition. 7. Locate the hose out of pathways where people may trip over it or in areas where the hose may be subject to accidental damage. 8. Open tank valve fully (counter-clockwise). Turn the on/off valve at the unit slowly to the