Thermo Scientific Omni FTIR Multi Gas CEMS, Instruction Manual

Page: 170 / 254

Preventive Maintenance and Servicing
Sample System Heater Assembly Components
5-86 Omni FTIR Multi Gas CEMS Instruction Manual Thermo Fisher Scientific
Use the following procedure to replace the sample solenoid valve inside of
the sample system heater assembly.
Equipment Required:
Phillips screwdriver
Wrench, 5/8-inch (2), 9/16-inch, and 1/2-inch
Hex wrench, 3/16-inch and 9/64-inch
Wire Cutters
Tie Wraps (zip ties)
1/4-inch Swagelok union fittings
Plugs for 1/4-inch Swagelok tube fittings
Liquid leak detector (such as Snoop)
6 foot section of PTFE or PFA tubing with 1/4-inch nuts and ferrules
attached
Sample solenoid valve
CAUTION High surface temperatures present. Allow sufficient time to
cool. ▲
1. Remove the sample system heater assembly and its cover per the
previously mentioned procedure “
Removing the Sample System Heater
Assembly and Cover ”.
2. Remove the heated block assembly from the heater box per the
previously mentioned procedure, “
Removing the Heated Block
Assembly ”.
3. Turn the heated block assembly around to access the back of the
assembly.
4. Using the 9/64-inch hex wrench, loosen slightly but do not remove the
5 screws that mount the double coil clamp plate to the heated block.
This will allow some freedom of movement of the copper tubing
(
Figure 5–60 ).
Replacing the
Sample Solenoid
Valve