Removing The Heated Block Assembly - Thermo Scientific Omni FTIR Multi Gas CEMS Instruction Manual

Preventive Maintenance and Servicing
Sample System Heater Assembly Components
Removing the
Heated Block
Assembly
5-82 Omni FTIR Multi Gas CEMS Instruction Manual
Use the following procedure to remove the heated block assembly from the
sample system heater assembly box. This will be necessary to replace both
the check valve and the sample solenoid valve
Equipment Required:
Phillips screwdriver
Wrench, 5/8-inch (2), 9/16-inch, and 1/2-inch
Hex wrench, 3/16-inch
Wire Cutters
Tie Wraps (zip ties)
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
Assembly and Cover".
2. Remove the top, bottom, left, and right side pieces of insulation that
are tucked against the inner walls of the box. Note how they are
installed for re-installation later.
3. Using the 5/8-inch wrench, loosen the nuts that secure the bulkhead
fittings to the box for the Ejector Air In, FTIR In, and FTIR Out.
4. Using the 3/16-inch hex wrench, loosen and remove the 4 large screws
in the corners that mount the heated block assembly to the box.
5. Carefully slide the heated block assembly out of the sample system
heater assembly box.
6. To re-install the heated block assembly, slide it back into the sample
system heater assembly box. Ensure that the washers on the bulkhead
fittings are positioned against the outside wall of the box, and be sure
that the grommet for the heater wires and RTD is properly seated.
7. Using the 3/16-inch hex wrench, install and tighten the 4 mounting
screws in the corners of the heated block assembly until snug.
(Figure 5–59).
"Removing the Sample System Heater
Thermo Fisher Scientific