Thermo Fisher 3307 SRO CO2 Sensor Kit Owner’s Manual

: September 30, 2024
: Thermo Fisher

Table of Contents

Thermo Fisher 3307 SRO CO2 Sensor Kit
Product Information
Product Usage Instructions
FAQ
Parts required
Tools required
Installation
Appendix
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Thermo Fisher 3307 SRO CO2 Sensor Kit

Product Information

Specifications

Model: 3307 (Stericult Incubators)
Parts Included: IR CO2 sensor, Sensor Plug, Input Harness, Split Ferrite Cable, Top & Bottom Plenum Gasket, Alum Tape, Plenum Assy
Tools Required: Thermo White w/ 5% Black Paint Pen, Dust mask, Gloves, Needle nose pliers, 11/32 socket or wrench, Dremel tool, Tie wrap gun, PHP screwdriver, Cleaner / Lubricant

Product Usage Instructions

Turn off the unit and disconnect the power cord.
Put on a static wrist strap and connect it to the ground.
Remove the left side cover by unscrewing the four screws.
Disconnect various wiring connectors and leads as per the manual.
Remove the blower/RH conditioner assembly carefully.
Replace the dummy sensor plug with the new sensor plug (3310032).
Disconnect wires and tubing as instructed.
Remove nuts fixed to the side duct assembly using a hand tool.

Note

Follow the installation steps carefully to ensure proper setup of the SRO CO2 Sensor Kit for Model 3307.

FAQ

Q: What should I do if I encounter difficulties during installation?
A: If you face challenges during installation, refer back to the instruction manual or contact customer support for assistance.

Instruction Sheet

7231204-3307 Rev 2

Application

SRO CO2 Sensor Kit

Model

3307 (Stericult Incubators)

Parts required

Component

number

| Object description| Component

quantity

---|---|---
231238| IR CO2 sensor (New)| 1
3310032| Sensor Plug| 1
350204| Input Harness for Sensor| 1
270106| Split Ferrite 1/4OD Cable| 1
103123| Top & Bottom Plenum Gasket| 2
300356| Alum Tape HI-TEMP 1| 1
3307353| SRO 3307 Plenum Assy (Please refer to Appendix for the part list)| 1

Tools required

Part number	Part description
173023	Thermo White w/ 5% Black Paint Pen
	Dust mask
	Gloves
	Needle nose pliers
	11/32″ socket or wrench
	Dremel tool
	Tie wrap gun
	PHP screwdriver
	Cleaner / Lubricant

Note Please inform the customer about the process involved in installing a new sensor, this will help in getting the right location to perform servicing of the unit.

Installation

Turn the unit off and disconnect the power cord.
Put on the static wrist strap and connect it to the ground. Do not use the incubator as it is not grounded when disconnected.
Remove the four screws from the left side cover. Set the cover aside.
Disconnect the 2-position temp sensor wiring connector.
Disconnect the black and white wires of the conditioner heater from the harness.
Note Some tie-wraps may need to be removed in this process.
Disconnect the black white and ground leads from the blower motor terminals, note the orientation before removal.
Disconnect the ribbon cable from the micro board. Remove the ribbon cable from the clips on the plenum cover, if applicable.
Loosen and remove the plastic tubing nut (turn the nut to the right) from the steel tube of the RH conditioning assembly.
Unlatch the four ‘suitcase’ latches of the plenum cover and remove the cover. Retain all insulation (gloves and mask are required).
Remove (16) nuts (all are not visible in the picture below), using an 11/32″ socket or wrench, from the blower / RH conditioner plate assembly and remove the assembly as shown in Fig. 2.
Remove (20) nuts using an 11/32″ socket or wrench, from the lower plate and remove the plate as shown in Fig. 3.
Disconnect 3 sensors, IR CO2, RH & Temperature sensor. Replace the dummy sensor plug with the new sensor plug (3310032) in the kit as shown in Fig. 4.
Disconnect the wire coming from the plenum heater (marked below) through the snap bushing as shown in Fig. 5.
Disconnect the front side and back side tubing from the side duct as shown in Fig. 6.
Remove 20, 11/32 Hex nuts fixed to the Side duct assembly (top and bottom) as highlighted below in Fig. 7. Slowly pull the side duct assembly out of the unit such that the lower part comes out first. Reserve all the Hex nuts for future use.
Note Lubricate the studs, so that they do not break. Start removing nuts from outside working in, center nuts to be last to be removed. A hand tool is preferred.
Discard the gaskets attached to top and bottom as marked below in Fig. 8 and reinstall the top and bottom plenum gasket (103123).
Remove top and bottom insulation from the side duct assembly. Secure the insulation material to be used in next steps as shown in Fig. 9.
Attach top and bottom insulation to the new side duct assembly (3307353) from the kit with aluminum tape as shown in Fig. 10 below.
Install duct assembly to unit, top edge first (as shown in Fig. 11) and try to align the holes with the studs.
Secure with 20, 11/32 SS Hex nuts (which are removed in step 15), 10 in the bottom part (as marked in the image below in Fig. 12) and 10 in the top part. Each nut should be tightened a little, then the next, and so on until tight, so that the studs do not break off. Tighten all the nuts evenly until gasket has a good seal.
Reconnect the wires from plenum heaters to the connectors (marked below), taking it through the snap bushing as shown in Fig. 13.
Place tubing through hole in plenum back side and front side as shown in Fig. 14.
Locate a small PCBA (IR Circuit board) associated with CO2 Sensor, disconnect all electrical connection and discard the PCBA as shown in Fig. 15.
The main harness (350204) running from main PCBA to all 3 sensorsneeds to be replaced with new one, to do this PCBA needs to be unscrewed from stand-offs. The harness is running behind the frame asshown in Fig. 16. Disconnect the connection highlighted. See dottedline with blue arrows below:
Now using the Dremel tool, gently sand away the sheet metal opening to accommodate the new sensor and dummy plug of a larger diameter. This should be done while using a vacuum to capture any paint or metal dust. Verify that both new CO2 sensor and new dummy plug will fit through the opening and seated properly.
Using a touch-up pen “Thermo White w/ 5% Black Paint Pen”P/N 173023, apply in the areas where paint is removed during sanding as shown in Fig. 17.
Reinstall the old RH & Temperature sensor removed from the unit as shown in Fig. 18.
Connect the electrical connection of sensor as per pictures shown in figures below. – CO2 Sensor, Black wire with green plug coming from main harness, connect to CO2 Sensor backside.
RH Sensor
Temperature sensor
Reinstall the blower / RH conditioner plate assembly. Position on top of plenum and secure with 16 nuts removed in step 10 as shown in Fig. 22.
Position the bottom plate onto the bottom of the plenum and secure it with nuts which are removed in step 11 as shown in Fig. 23.
In the new harness the Alarm Contact (shown below in Fig. 24) plug size is bigger than the existing cutout, this needs to be increased slightly by sanding with the Dremel tool. Using the vacuum, clean all the metal dust. Extra caution should be taken not to allow any metal dust to accumulate on any of the electrical components on the inside.
Using a touch-up pen “Thermo White w/ 5% Black Paint Pen” P/N 173023, apply in the areas where paint is removed during sanding.
Make sure to ensure the connection is removed in steps 4 through 9.
Using the vacuum clean all the insulation dust inside the cabinet and close it with the side panel.
Connect the power cord and turn the unit on. Allow the incubator to stabilize for at least two hours.
Verify all set points and calibrate the CO2 system (Section 3 of the manual) if needed.
Verify unit operation.

Appendix

SRO 3307 Plenum Assy (3307353)

Component number| Object description| Component quantity
---|---|---
22052| #8-32 x 3/8 SS PHP Screw| 4
23007| #10-32 SS Hex nut| 2
103118| PSA Foam Gasket 1/4 x 3/8| 1
103121| Upper-Air flow PNL Gasket| 1
103122| Lower Air flow PNL Gasket| 1
103131| Plenum Sample Port Gasket| 2
231205| CO2 IR Mount High Temp| 2
231243| CO2 IR Mount High Temp GMP 251| 1
590035| #10-32 x 3/8 SS PHP Seal screw| 12
730060| 0.416 SS Washer| 2
840020| 1/4 HOSE BRS BULKHEAD FTG| 2
132102| Side Duct heater (Orange)| 1
1900544-31-1| Side duct port mount| 2
3310300-16-4| Side duct weld assy w/ Weld studs| 1
3310300-31-6| Side duct IR Sensor stop| 1
840040_Nut| 0.375 NUT BLKHD Fitting| 3
Parts supplied from Vendor as part of 1900528 Sample port Assy; Air duct (Referenced in PSS#3310-722-209)

SRO 3307 PLENUM ASSEMBLY (3307353)

The material in this instruction sheet is for information purposes only. The contents and the product it describes are subject to change without notice. Thermo Fisher Scientific makes no representations or warranties to this instruction sheet. In no event shall Thermo be held liable for any damages, direct or incidental, arising out of or related to the use of this instruction sheet.

Instruction Sheet 7231204-3307