Replacing Co2 Solenoid Assembly - Thermo Scientific 3403 Manual

Replacing CO2
Solenoid Assembly
Thermo Scientific
1. Turn the power switch to "Off " and unplug the unit.
2. Access the solenoid (PN 1900437) by removing the twelve #2 Phillips
screws from the side access panel.
Caution The solenoid outlet is a red tube secured to an easily-broken thin-
walled orifice by a free-sliding collar. Carefully slide the collar away from
the solenoid, then use a knife blade to carefully PUSH the tubing off the
orifice.
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Figure 6-8. CO2 Solenoid
3. Carefully remove the collar and red tubing from the solenoid outlet.
4. Release the clip securing the inlet tube to the solenoid, and pull off the
tube.
5. Cut the plastic wire ties securing the harness to the CPU PCB and
unplug the solenoid connector.
6. Remove the 2 mounting bracket screws and remove the solenoid from
the control housing.
7. Remove the bracket from the solenoid.
8. Install the replacement solenoid in the reverse order.
Section 6
Maintenance and Repairs
Midi 40 CO2 Incubator 6-7