Forma Scientific 3546 - 6.5 Replacing the Triac; 6.6 Replacing the CO2 Solenoid

Forma Scientific, Inc._____________________________________________Service
6-9
 After the sensor has been replaced, calibrate the CO
2
controller according
to the instructions in Section 6.2.
6.5 Replacing the Triac (Refer to Wiring Diagram 140179-71-0-D)
 Turn the incubator off and disconnect it from the power source.
 Remove the screws securing the right side access panel. Remove the panel
and set aside.
 Open the incubator outer door to gain access to the triac mounting screws
from underneath the control panel.
 Remove the two mounting screws which secure the triac.
 Carefully disconnect the wires to the triac and note their connections.
 Remove the triac from the unit. Note the thermal compound between the
base of the triac and the floor of the control panel housing. If necessary,
reapply more thermal compound before installing the new triac.
 Install the new triac by reversing the above procedure.
6.6 Replacing the CO
2
Solenoid (Refer to Wiring Diagram, 140179-71-0-D)
 Turn the incubator off and disconnect it from the power source.
 Remove the screws securing the right side access panel. Remove the panel
and set aside.
 Locate the CO
2
solenoid and disconnect the tygon tubing attached to it.
Note how tubing is installed so that it can be attached to new solenoid in
same way.
 Remove the screws that hold the solenoid in place.
 Disconnect the wiring to the solenoid, making note of the connections.
 Remove the solenoid and install the new unit by reversing the above
procedure. Note the flow direction marked on solenoid.