Hitachi ChromasterUltra Rs 6270 Instruction Manual page 66

2.2 Operating Principle and Functional Description
(l) [When the back flush wash for the injection port is used]
Back flush wash with the wash fluid1.
Switch the syringe valve to the back flush wash side
(Port4). Switch the 3-way solenoid valve of the back
flush wash side to the syringe valve side. Deliver the
wash fluid1 to the injection port with the wash pump to
wash the injection port. Stop delivering the wash fluid
with the wash pump after completion of the washing
time.
Switch the syringe valve to the syringe side (Port 3).
Switch the 3-way solenoid valve of the back flush wash
side to the waste solution side.
After washing, it moves to the idle status.
Figure 2-23 Back Flush Wash
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