Thermo Scientific Omni FTIR Multi Gas CEMS, Instruction Manual

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Preventive Maintenance and Servicing
Sample System Heater Assembly Components
Thermo Fisher Scientific Omni FTIR Multi Gas CEMS Instruction Manual 5-81
7. Using the 9/16-inch wrench and the 1/2-inch wrench, remove the
copper tubing segment and union fitting from the old eductor pump
and install it on the new eductor pump in the same orientation,
tightening the nut until snug.
8. Using the 9/16-inch wrench and the 1/2-inch wrench, remove the
union fitting on the opposite side of the old eductor pump and install it
on the new eductor pump in the same location, tightening the nut until
snug.
9. Using the 9/16-inch wrench and the 1/2-inch wrench, remove the
stainless steel tubing segment and fittings from the old eductor pump
and install it on the new eductor pump in the same orientation,
tightening the nut until snug.
10. It is important to leak test the rebuilt assembly. Using the wrenches,
install the 1/4-inch Swagelok plugs onto the fittings for the FTIR Out
and the Ejector Exhaust. On the right side of the system, disconnect
the inlet air line of the purge gas generator from the tee fitting and
connect the 6 foot piece of PTFE or PFA tubing to the tee, to create a
long air line. Connect that air line to the Ejector Air In fitting. Turn
the air regulator that is next to the filters up to 25 PSI. Using the liquid
leak detector, wet each connection to see if there are leaks, which will
produce air bubbles. If any are present, tighten the fittings until the
leaking stops.
11. Turn the air regulator back down to zero PSI. Using the wrenches,
disconnect the air line from the Ejector Air In fitting and the tee on the
side of the rack. Re-connect the inlet of the purge gas generator to its
original position. Remove the 1/4-inch Swagelok plugs. This completes
the leak test.
12. Place the eductor pump plumbing assembly back into the sample
system heater assembly box. Using the 5/8-inch wrench, tighten the
bulkhead nuts to secure the fittings to the box. Use a second 5/8-inch
wrench to hold the hex part of the fitting in place to keep the fittings
from trying to spin during reassembly.
13. Follow steps 1–4 in reverse order to complete the procedure.