Grundfos SQFlex SQF Pressure Switch for CU200

Grundfos SQFlex Optional Controls

SQFlex controls can be combined if you need more features than one control can provide. The CU200 interface box communicates with the pump and monitors operating conditions. Built-in diagnostics indicate faults and dry-running, as well as display operating status, power consumption, and water level switch input. The Water Level Switch interfaces with the CU200 control to turn off the pump when the tank is full. Since the CU200 control circuit uses only 15 mA, the water level switch can be located in a tank as far away as 1,640′ from the pump, using a minimum #18 AWG 2-conductor wire.

The IO50 control box includes cable terminations and a simple manual on/off switch that interfaces between a solar array and the pump to allow you to turn off the high voltage array when servicing the pump or plumbing.

The IO101 AC interface box is for using AC backup on a solar pump. An automatic transfer switch disconnects the solar array when AC power from a generator (120 VAC only), utility connection, or inverter is present. When AC power stops, it automatically reconnects the array to let the sun continue pumping. The SQFlex pumps will not function with a GFCI in the supply circuit and should not be used where a GFCI is required.