Figure 5-63. Solenoid Valve Replacement - Thermo Scientific Omni FTIR Multi Gas CEMS Instruction Manual

Thermo Fisher Scientific
Nut driver, 11/32-inch
Solenoid valve
1. Remove the left side panel per procedure
Panel" for better accessibility.
2. If the probe spike or probe span solenoid valve is being replaced, turn
off the HCl/SF6 cylinder or the EPA mix cylinder, respectively. From
the rear of the pneumatic panel, the probe spike is the first solenoid on
the left and the probe span is next to it. If any of the other three
solenoids are being replaced, note the pressure on the house air
regulator located on the right side of the system, so that it can be reset
later. Pull up on the knob to unlock it and turn the pressure down to
zero (Figure 5–18).
Figure 5–63. Solenoid Valve Replacement
3. The components are accessed from the rear of the pneumatic panel.
Using the 9/16-inch wrench, loosen the nut and remove the tubing (or
fittings in some cases) from the top and bottom fittings on the solenoid
valve. Note their locations to facilitate re-connection
4. Using the 11/32-inch nut driver, loosen and remove the 2 nuts that
mount the valve bank assembly to the flow meter panel. Pull the valve
bank assembly away from the flow meter panel to access the back side
(Figure 5–62).
Preventive Maintenance and Servicing
Pneumatic Panel Components
"Removing the Left Side
(Figure
Omni FTIR Multi Gas CEMS Instruction Manual
5–62).
5-93