Graf one2clean+ Instruction For Operation And Maintenance page 9

4.2 Connections on the rear of the control unit
Connections:
1 Connection for mains cable
230 V AC ~ 50 Hz
2 X1: Pre-assembled valve cable
3 X2: two pin plugs for the air compressor connection
4 COM: Connection for communication module (optional) and/or port for PC
5 F1: T6.3A main fuse, slow blow
6 F2: T2A fuse for UV module, slow blow
7 Connection for temperature sensor, "must be plugged in!"
9 X3: Connection for UV module
10 P: Connection for pressure measuring hose
4.3 Connections on the air distributor/valve block
When delivered, the control unit is already correctly connected to the corresponding connection on the air
distributor/valve block.
A distinction is made between three different air distributor variants:
1. 4-way air distributor (4 separate valves Y1 ...Y4)
2. 3-way air distributor (3 separate valves Y2 ...Y4) and
3. 2-way air distributor (2 separate valves Y3 and Y4)
To allow you to correctly connect up at a later date, the connectors of the control unit (X1.1 ...X1.4), their
function (aeration, clear water extraction or sludge extraction) and the connections on the air distributor in
a matrix are shown in detail in the table below.
Functions
Aeration
Clear water extraction
Sludge Return
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4. Control unit
Figure 5: Rear of KL24plus control unit
Control unit
Valves
Valve 1
Valve 2
Valve 3
Valve 4
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Air distributor connections
Connectors
Y2
X1.1 X
X1.2
X1.3
X1.4
3-way
Y3 Y4
X
X