How do I prime the water supply system when first connecting the refrigerator?

Begin filling the tank by pressing and holding a drinking glass against the water dispenser paddle until water comes out, which may take about 1.5 minutes. Continue dispensing water for about four minutes to flush the system and plumbing connections of any impurities, stopping to empty the glass as necessary. This step is important because air in new plumbing lines can result in two or three empty ice maker cycles. (Page 16)