120 VAC Upon a feed signal from low water cut-off, the VXT feeder delays (from 30 seconds to 10 minutes) to allow condensate to return to boiler. If make-upwater is required after the delay period, the VXT will initiate a feed cycle. TheVXT can be set to feed to the level of the low water cut-off or can be set from 1 to 5 gallons to raise the water level above the cut-off to the normal operating level. The digital feed counter tracks all water fed into the boiler including water added using the Manual Feed Button.