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 5-85
9. It is important to leak test the rebuilt assembly. 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. Attach the 1/4-inch Swagelok union fitting
to it and connect that to the Sample In line. Turn the air regulator that
is next to the filters up to 25 PSI. Using the liquid leak detector, wet
the connection between the check valve and the stainless steel tubing
segment to see if there are leaks, which will produce air bubbles. If any
are present, tighten the fitting until the leaking stops. Turn the air
regulator back down to zero PSI.
10. Leak test the other side of the check valve by disconnecting the air line
with union from the Sample In line, and connecting that to the
Flowback line using the wrenches. Install the 1/4-inch Swagelok plug
onto the other 1/4-inch Swagelok union fitting and install that onto
the Sample In line. Turn the air regulator up to 25 PSI. Using the
liquid leak detector, wet the connection between the check valve and
the copper tubing to see if there are leaks, which will produce air
bubbles. If any are present, tighten the fitting until the leaking stops.
11. Using the 9/16-inch wrench, slightly loosen the 1/4-inch plug on the
Sample In line. Air should be flowing out of it if the check valve is
installed in the proper direction. Turn the air regulator back down to
zero PSI. Remove the 1/4-inch plug and 1/4-inch Swagelok union
fitting from the Sample In line and disconnect the air line with union
fitting from the Flowback line. Remove the union fitting from the end
of the air line. Disconnect the air line from the tee on the side of the
rack. Re-connect the inlet of the purge gas generator to its original
position. This completes the leak test.
12. Using the 9/64-inch hex wrench, tighten the 5 mounting screws that
were loosened that attach the double coil clamp plate to the heated
block, until snug.
13. Follow the procedures referenced in step 2, “ Removing the Heated
Block Assembly ”, and in step 1, “ Removing the Sample System Heater
Assembly and Cover ”, in reverse order to complete the procedure.