Thermo Scientific 42i Instruction Manual page 204

Servicing
Solenoid Valve Replacement
Solenoid Valve
Replacement
7-20 Model 42i Instruction Manual
6. Remove the six screws holding the top housing assembly to the bottom
half.
7. Remove the converter cartridge/heater assembly from the bottom
housing assembly.
8. Loosen the heater clamp, pry heater apart no wider than necessary and
remove the converter cartridge noting the proper orientation of heater
wires and thermocouple probe.
9. To replace converter, follow previous steps in reverse. Note Be sure to
wrap the O converter tube snugly around the heater.
3
Use the following procedure to replace the solenoid valve
Equipment Required:
Solenoid valve
Wrench, 5/16-inch
Philips screwdriver
Equipment Damage Some internal components can be damaged by small
amounts of static electricity. A properly ground antistatic wrist strap must
be worn while handling any internal component.
1. Refer to "Removing the Measurement Bench and Lowering the
Partition Panel" in this chapter to lower the partition panel, then
proceed to the next step below.
2. Disconnect solenoid from the Measurement Interface board (NO/NO
connector). Note electrical connections to facilitate re-connection.
3. Remove plumbing from solenoid. Note plumbing connections to
facilitate re-connection.
4. Pull solenoid valve from mounting clip.
5. To replace solenoid, follow previous steps in reverse.
(Figure 7–11).
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