SQFlex data booklet

SQFlex Solar with CU 200 and level
switch
The SQFlex Solar system allows solar energy to be stored
as water in a reservoir.
SQFlex Solar systems with a water reservoir are used, for
instance, in the following cases:
• There is a need for water supply at night.
• For short periods, the solar energy is insufficient to run
the pump.
• A backup water source is needed.
Benefits
Combined with CU 200, the level switch has a pump cut-out
function when the water reservoir is full.
CU 200 indicates the following:
• full water reservoir (level switch activated)
• pump operation
• input power.
CU 200 indicates operational downtime in the following
cases:
• dry running
• service (see CU 200 SQFlex control unit)
• insufficient energy supply.
Other benefits:
• easy installation
• maintenance confined to periodic cleaning of the solar
panels
• few and simple components.
Note: CU 200 works with SQFlex up to 1400 W. CIU 903
works with any SQFlex up to 2500 W.
2
3
4
5
1
6
7
11
14
5
15
TM022305
SQFlex Solar with CU 200 and level switch
Pos. Description
1 SQF pump
2 Submersible drop cable
3 Cable clips
4 Straining wire
5 Wire clamps
6 Solar panels
7 Support structure
11 CU 200 SQFlex control unit
14 Water reservoir
15 Level switch
Note: For the number of the required solar panels, see the
sizing tool at Grundfos Product Center.
SQFlex
3
12
Applications