Thermo Scientific Omni FTIR Multi Gas CEMS Instruction Manual page 152

Preventive Maintenance and Servicing
Temperature Control Box Components
Replacing the Power
5-68 Omni FTIR Multi Gas CEMS Instruction Manual
Use the following procedure to replace either of the 2 power relays inside of
the temperature control box
Relays
Equipment Required:
Phillips screwdriver
Small Phillips screwdriver
Flat blade screwdriver
Nut driver, 5/16-inch
Power relays
Equipment Damage Some internal components can be damaged by small
amounts of static electricity. A properly grounded antistatic wrist strap
must be worn while handling any internal components.
1. Remove the temperature control box cover per the previously
mentioned procedure
2. Using your fingers, pop the end covers of the relay up to access the
screws.
3. Using the flat blade screwdriver, loosen the 2 screws on the relay side
that does not have the varistors, enough to slide the wires out (they are
attached with fork terminals). Note their locations to facilitate re-
connection.
4. Using the flat blade screwdriver, remove the 2 screws on the side of the
relay that does have the varistors and remove the wires and the resistor.
5. Using the 5/16-inch nut driver, loosen and remove the 2 nuts that
mount the relay to the temperature control box. Set aside the hardware
and remove the relay.
6. Pop the end covers up on the new relay and place it in the temperature
control box over the mounting studs in the proper orientation. Thread
on the 2 mounting nuts, and then use the 5/16-inch nut driver to
tighten them until snug.
(Figure 5–55).
"Removing and Installing the
▲
Cover".
Thermo Fisher Scientific