Target module window  cooling lines at TCS has been modified to use spare 2 channel in TCS: WFB1. The old cooling lines used a spare channel in TCS WFB2(HVC channel) are removed and capped. After change, TCS window cooling lines will be interlocked with heaters. The test run on new lines are good. No leak  on all fittings, and signals on flow and temperature are good.   Control people will be noticed on this change for their following up job.