Forma Series II 3110 Water-Jacketed co2 Incubators User Manual

5-6
Water Jacketed CO2 Incubator
Thermo Scientific
Section 5
Routine Maintenance
Illustration A. Disassembly
Illustration B. Reassembly

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Refer to Illustration B on the previous page. 
14. Verify that the nylon screws have been installed in the vacant door
strike holes.
15. Move the door heater cable to the slot on the right side of the tray.
16. Push any excess cable into the tray area, making sure the wire will not
be damaged when the tray is pushed back in and secured.
17. Install the lower inner door hinge in the drawing. (This was the top
inner door hinge removed in Step 7 and should have the white plastic
bushing installed.) Do not completely tighten the screws.
18. Insert the inner door into the lower hinge with the latch to the left.
Align the door to chamber opening and place upper hinge in position.
19. Insert the screws into the hinge but do not completely tighten them.
20. Match the pins on the yellow connector with the
socket on the door. Press the connector
completely into the socket and slide the strain
relief down until no yellow is visible on the plug
(Figure 5-6).
21. Push the power cable completely into the slot in the electronics tray.
Press the tray  into position and secure it with the screws.
22. Align the silver power buss visible through the glass along the hinge
side of the door with the gasket along right side of chamber opening. 
23. When both hinges are in place with the hinge screws still loosened,
push up on the bottom hinge. This will shift both hinges and the door
upward. Tighten the hinge screws.
24. Attach the strike plate, aligning it so the knob secures the door against
the gasket.
25. Attach the outer door hinges.
26. Install the nylon screws in the previously upper and lower outer hinge
locations.
27. Install the nylon screws in the previously upper and lower inner hinge
locations.  Assemble the outer door to the incubator and return the
unit to service.
Water Jacketed CO2 Incubator        5-7
Thermo Scientific
Section 5
Routine Maintenance
Figure 5-6. Connector
Reversing Hinges for
Exterior Door (continued)

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Warning The electronics drawer contains hazardous voltages. Replacing the
fuses should be performed by qualified personnel only. 
▲
There are three fuses in the incubator that can be replaced. To replace a
fuse:
1. Turn off the incubator’s power switch.
2. Unplug the power cord from the wall outlet.
3. Open the exterior cabinet door.
4. Remove two screws as shown. See Figure 5-7.  
5. Carefully slide out electronics drawer.
There are two fuses on the main microboard labeled F1 24VAC Door
Heater and F4 24VAC Collar Heater. Refer to Figure 5-8 for the location
of the main microboard. Remove the fuse and replace it with a new one of
the same specification. Refer to Table 5-1.
5-8
Water Jacketed CO2 Incubator
Thermo Scientific
Section 5
Routine Maintenance
Replacing Fuses
Fuse #
Manufacturer Part #
Amperage Rating
Rupture Speed
IEC Letter Code
F1
BUSS GMC-3.5A
3.5 Amp
Time-Lag
T
F4
BUSS GMC-2.5A
2.5 Amp
Time-Lag
T
115 VAC ACC
BUSS GMC-1.0A
1.0 Amp
Time-Lag
T
230 VAC ACC
BUSS BK-GMC-500mA
0.5 Amp
Time-Lag
T
Table 5-1. Fuses and Specifications
Figure 5-7. Screw Locations

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The other replaceable fuse is the accessory outlet fuse mounted to the floor
of the electronics drawer. To locate the fuse, refer to Figure 5-8. Remove
the fuse and replace with a new one of the same specification. 
1. When the fuse has been replaced, slide the electronics drawer back in,
being very careful to place the door heater cable back into the provided
slot so that the drawer does not pinch the cable.  
2. Replace the two screws removed earlier.
3. Close the exterior door.
4. Plug the power cord back into the dedicated, grounded circuit.
5. Turn on power switch. If the unit operates properly, it may now be
returned to service.
There is one fuse in the incubator that is not replaceable.  This fuse is
intended for catastrophic failure only and is located on the power supply
circuit board in the electronics drawer. See Figure 5-8. If this fuse is blown,
the power supply must be replaced. Contact the factory for more
information.
Figure 5-8. Electronics Drawer
Water Jacketed CO2 Incubator        5-9
Thermo Scientific
Section 5
Routine Maintenance
Replacing Fuses
(continued)

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Draining Water
Jacket
Replacing Access
Port Filter
Replacing Air Sample
Filter
Replace the HEPA filter when the REPLACE HEPA reminder is displayed.
The REPLACE HEPA reminder can be set to alarm after a specified time
from 1 to 12 months. The reminder default is the factory recommended
setting of 6 months. For details, see Section 3. 
The air sample filter should be replaced whenever the  HEPA filter is
replaced. On the inside of the chamber, inserted into the back of the
blower scroll, is the air sample filter and its connecting tubing. Disengage
the tubing from the back of the scroll, then remove the filter from the
tubing and discard. Install the new filter. Connect it securely to the air
sample filter tubing, then insert the tubing into the back of the blower
scroll.
The access port filter should be replaced whenever the HEPA filter is
changed. The filter is connected to the stopper in the upper left corner of
the chamber back wall. Remove the filter from the connecting tube and
discard. Install the new filter.
1. Turn the unit off. Remove the plug from the power source. 
2. Remove the front cover plate below the door. There are small flatblade
screwdriver pry slots on each end of the plate to help remove it.  See
Figure 5-9.
Figure 5-9. Front Cover Plate Below the Door
3. If present, remove the drain plug. 
4. Connect the hose barb insert to the drain on lower front of the water
jacket and to the drain hose. 
5-10
Water Jacketed CO2 Incubator
Thermo Scientific
Section 5
Routine Maintenance
HEPA Filter
Maintenance

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