Waters Alliance e2695 Operator's Manual page 204

B.2.7.2 Three-column selection valve
The 3-column selection valve is an eight-port, three-position valve preconfigured at the factory as
follows:
• Port 1 – Routed to the column (a 2.1 mm × 50 mm column is supplied)
• Port 2 – Routed to waste
• Port 3 – Routed through a restrictor bypass to the detector
Figure B–9: Three-column selection valve configuration (as shipped)
Column 1
Restrictor
In from
Alliance e2695
Install the 3-column selection valve after installing the column heater or column heater/cooler.
(See "Install the column heater and column heater/cooler" on page
Required material
Open-end wrench, 5/16-inch
To connect the 3-column selection valve to the fluid path of the sample
management system:
1. Use the 5/16-inch wrench to connect the red line (from the e2695 injector) to the IN port on
the column selection valve.
2. Use the tubing and fittings supplied with the 3-column selection valve to connect the OUT
port of the column selection valve to the detector inlet.
3. Replace the stainless steel union shipped inside the column heater or column heater/cooler
with the column.
1
2
3 OUT
3
2
IN
1
Waste
February 27, 2018, 715003794 Rev. C
Page 204
Out to
detector
79.)