Came out to perform QC on clients new system, upon arrival performed QC by checking overall install wiring and draws. Came out to perform QC on clients new system, upon arrival performed QC by checking overall install wiring, amp draws, etc.,etc..System is operating with a 20° delta T with the return air at 69 and the supply air at 49. Checking the charge from the sub cooling at 6° and the superheat at 8° superheat seems a little low but that is more than likely due to the low temperatures. System is operating per manufacturers specifications.