Thermo 3920 Operating And Maintenance Manual Download

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Model 3920 ____________________________________________________________________Electrical Schematics

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Summary of Contents for 3920

Page 1: ...Model 3920 29 cu ft Capacity Environmental Chamber Operating and Maintenance Manual Manual No 7033920 Rev 15 ...

Page 2: ...MANUAL NUMBER 7033920 15 21505 SI 9018 9 18 03 New drier P N 209016 no flare connections ccs 14 21173 IN 3057 11 15 02 Added ground shields on temperature and humidity probes ccs 13 20479 IN 3013 6 27 02 Removed Auto IR CO2 option as a standard accessory aks 12 20479 IN 3013 5 29 02 Added Auto IR CO2 option as a standard accessory aks 20480 PIP 041 11 21 01 Removed reference to p trap 190467 no lo...

Page 3: ...mientos asociadas con este simbulo Equipment being maintained or serviced must be turned off and locked off to prevent possible injury Risques potentiels liés à l énergie L équipement en entretien ou en maintenance doit être éteint et mis sous clé pour éviter des blessures possibles Geräte an denen Wartungs oder Servicearbeiten durchgeführt werden müssen abgeschaltet und abgeschlossen wer den um V...

Page 4: ...Model 3920 _________________________________________________________________________________ iii ...

Page 5: ...b Changing the Chart Paper 2 3 c Changing the Pen 2 3 d Calibrating the Chart Recorder 2 3 2 9 Offset Calibration 2 4 2 10 Honeywell Recorder 2 4 2 11 Controller Configuration 2 4 Section 3 Control Panel Operation 3 1 3 1 The 3920 Control Panel 3 1 3 2 Setting the Operating Temperature Figure 3 3 3 2 3 3 Programming the controller 3 2 a Removing the mechanical lockout 3 2 b Removing the Software L...

Page 6: ... personnel sign a free and clear delivery receipt Whenever possible Thermo will assist in settling claims for loss or in transit damage Section 2 Installation and Start Up 2 1 Location Locate the unit on a firm level surface in an area of mini mum ambient temperature fluctuation A minimum of 12 inches clearance is required at the top of the incubator and a minimum of 3 inches clearance is required...

Page 7: ...ise approximately two units on the scale The alarm should be silenced and the overtemp indicator light should go out The overtemp safety thermostat is now set a few degrees above the control temperature setpoint When the chamber tem perature rises to the overtemp control point the alarm system will activate power to the heaters will shut off and the cham ber temperature will be maintained at the o...

Page 8: ...and arm as an assembly 2 Unsnap the plastic hinge securing the pen Remove and discard the old pen 3 Install the new pen by snapping the hinge securely around the pen arm 4 Re install the pen assembly by sliding the pen arm under the screws positioning the pen tip in the time line groove Tighten the screws 5 Push the Chart Change button Figure 2 4 and hold it for 1 second until the pen begins to mo...

Page 9: ...the controller and the reference sensor value 12 Press the Display key once Model 3920__________________________________________________________________Installation and Start Up Press Press Side View To turn the hardware lockout back on 1 Press the Up and Down Arrow keys simultaneously for 3 seconds The word InPt will appear in the upper dis play and set will appear in the lower display 2 Press th...

Page 10: ... Ct1 5 rA2 0 25 It1 NA Pb2 1 0 dE2 NA rA1 0 19 rE2 0 25 Ct2 30 PROG See Programming Sheets if required Setup Menus InPt In1 RT D CAL1 rL2 NA CAL2 NA dEC1 NA rtd1 DIN rH2 NA Hunt NA rL1 20 0 Ftr1 2 LrnL NA rHi 80 0 In2 NA LrnH NA OtPt Ot1 Ht AL2 NA LAt3 nLA SIL4 NA PrC1 NA LAt2 NA SIL3 OFF Aout NA HyS1 0 1 SIL2 NA Ot4 NA PrC3 NA Ot2 CL Ot3 AL3 AL4 NA ArL NA PrC2 NA AL3 Pr1 HyS4 NA ArH NA HyS2 0 1 H...

Page 11: ...te the audible alarm and the overtemp indicator light Interrupt power to the heaters and maintain the incubator s cabinet temperature at the overtemp safety control point Note The overtemp control is not directly calibrated The numbers 0 to 10 on the dial are for reference only and do not correspond to any specific temperature If an overtemp condition occurs the alarm can only be silenced by raisi...

Page 12: ...ckout Make sure the unit is turned off Wearing a grounding wrist strap or maintaining constant contact with the metal cabinet press in the four locking tabs on the frame of the Temperature controller There are two tabs on either side as shown in the front and side views in Figure 3 4 When all tabs are unlocked pull the con troller module out of its frame Looking at the top of the module locate the...

Page 13: ...ormance of the unit the ventilator caps should be closed at all times Figure 3 9 Section 4 Routine Maintenance 4 1 Cleaning the Incubator De energize all potential sources of energy to this unit and lockout tagout their controls O S H A Regulation Section 1910 147 The continued cleanliness of the stainless steel used in our products has a direct effect on the appearance and operation of the unit U...

Page 14: ...d list of preventive maintenance requirements See the specified section of the instruction manual for further details We have qualified service technicians using NIST traceable instruments available in many areas For more information on Preventive Maintenance or Extended Warranties please contact us at the number below Cleaning and calibration adjustment intervals are dependent upon use environmen...

Page 15: ...aps for adjustment open or close as required 4 1 Perform a complete decontamination procedure Wipe down interior shelves Between Experiments side panels with disinfectant Rinse everything well with sterile distilled water More frequent decontamination may be required depending on use and environmental conditions 2 9 Verify and document all calibrations at the minimum Clean drip pan and drain lines...

Page 16: ...top gasket around each of the air exhaust vents by turning the screw 6 Remove the eight screws from the top cover of the incu bator 7 Remove the four screws from each of the vent caps on the top cover of the incubator The top cover can now be removed Section 5 Service Servicing must be performed by qualified service personnel only De energize all potential sources of energy to this unit and lockou...

Page 17: ...move the black trim gasket located at the junction of the top assembly and the main incubator section The ends of the gasket have been joined together at the rear of the incubator Note When raising the top section note the orientation of the gasket seal at the top opening of the incubator chamber The gasket must be correctly positioned when reinstalling the top on the chamber 10 Slowly lift the en...

Page 18: ...ompression Finish Powder coated Salt spray tests exceed 1000 hrs per ASTM Standard B117 85 Weights Net 700 lbs Shipping Motor 850 lbs Temperature Alarm Sensor Thermostat Controller Thermostat Setpoint Analog reference dial Alarm Audible visual Fittings Drain Port 3 8 OD Copper Unit Heat Load 115V 5500 BTUH 1600W 220V 6000 BTUH 1750W Refrigeration Compressor 1 4 Horsepower air cooled R 134A Electri...

Page 19: ...20277 Triac 25A 2 403940 Thermostat B 10 0 220 F coated 1 403941 Thermostat B 20 10 220 F coated 1 131300 Blower Wheel 1 275030 Defrost Timer 1 630090 Heater 2 205062 Condensing Unit 1 4 HP 115V R 134A 1 991334 Solenoid 120V 101 Port 1 285599 Thermal Fuse 250V 17A 1 830044 Blower Motor 1 4 HP 115V 1 Immediate Stock Model 3920 ________________________________________________________________________...

Page 20: ...Model 3920 _________________________________________________________________Refrigeration Schematics 8 1 ...

Page 21: ...Model 3920 ____________________________________________________________________Electrical Schematics 8 2 ...

Page 22: ...Model 3920 ____________________________________________________________________Electrical Schematics 8 3 ...

Page 23: ...Model 3920 ____________________________________________________________________Electrical Schematics 8 4 ...

Page 24: ...Model 3920 ____________________________________________________________________Electrical Schematics 8 5 ...

Page 25: ...Thermo Electron Corporation Controlled Environment Equipment Millcreek Road P O Box 649 Marietta Ohio 45750 U S A Telephone 740 373 4763 Telefax 740 373 4189 ...

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