Waters Xevo TQD Overview And Maintenance Manual page 226

B External Connections
To connect the oil-free roughing pump:
1. Place the pump on the floor, within 1.5 m (5 feet) of the instrument.
2. Attach the NW25/NW40 adaptor to the roughing pump inlet flange
using an NW40 center ring, and then secure the connection with an
NW40 clamp, using the 7-mm nut driver to install the clamp.
3. Attach the NW25 tee to the NW25/NW40 adaptor using an NW25 center
ring, and then secure the connection with an NW25 clamp, using the
7-mm nut driver to install the clamp.
4. Using the NW25 center rings and clamp, and the 7-mm nut driver,
attach the flanged end of a length of 1-inch ID vacuum hose to the top
port on the NW25 tee, and the 10-mm reducer fitting and a length of
10-mm ID nylon tubing to the middle (perpendicular) port on the tee.
5. Using 2 hose clamps, connect the opposite end of the length of 1-inch
vacuum hose in
instrument's rear panel.
6. Connect the opposite end of the 10-mm nylon tube to the 10-mm source
vent port on the instrument's rear panel.
Notice:
separate exhaust systems are required: one for nitrogen, the other
for the roughing pump. Vent the exhausts to atmosphere through
separate lines. Oil mist can seriously damage the instrument if the
nitrogen exhaust line connects with the roughing pump exhaust
line. Your warranty does not cover damage caused by routing
exhaust lines incorrectly.
7. Using 1 hose clamp, connect a length of 12.7-mm clear PVC exhaust
tubing to the roughing pump exhaust port NW25 nozzle fitting.
226 March 14, 2014, 715004387 Rev. B
To avoid personal contamination with biohazards
Warning:
or toxic materials, and to avoid spreading contamination to
uncontaminated surfaces, wear clean, chemical-resistant,
powder-free gloves when working with the pump and its
connections.
To avoid skeletal or muscle injury, at least two
Warning:
people must lift the pump.
step 4 to the 1-inch OD straight vacuum port on the
To prevent serious damage to the instrument, two