Thermo Scientific 3920 Operating instructions

Model 3920
Forma Environmental Chamber
Operating and Maintenance Manual 7053920 Rev. 0

Thermo Scientific
MANUAL NUMBER 7053920
0 25355/IN-3932 5/14/09 Original - line cord to 30A and FLA to 20A (including 4A for optional DLP) ccs
REV ECR/ECN DATE DESCRIPTION By
Preface
Environmental Chamber i

Thermo Scientificii Environmental Chamber
Preface
Important Read this instruction manual. Failure to read, understand and follow the instructions in this manual
may result in damage to the unit, injury to operating personnel, and poor equipment performance. s
Caution All internal adjustments and maintenance must be performed by qualified service personnel. s
Material in this manual is for information purposes only. The contents and the product it describes are subject to
change without notice. Thermo Scientific makes no representations or warranties with respect to this manual. In
no event shall Thermo be held liable for any damages, direct or incidental, arising out of or related to the use of
this manual.
©2009 Thermo Scientific. All rights reserved.

Thermo Scientific Environmental Chamber iii
Preface
Important operating and/or maintenance instructions. Read the accompanying text carefully.
Potential electrical hazards. Only qualified persons should perform procedures associated with this
symbol.
Equipment being maintained or serviced must be turned off and locked off to prevent possible injury.
Hot surface(s) present which may cause burns to unprotected skin, or to materials which may be
damaged by elevated temperatures.
Marking of electrical and electronic equipment, which applies to electrical and electronic equipment
falling under the Directive 2002/96/EC (WEEE) and the equipment that has been put on the market
after 13 August 2005.
This product is required to comply with the European Union’s Waste Electrical & Electronic
Equipment (WEEE) Directive 2002/96/EC. It is marked with the WEEE symbol. Thermo Scientific
has contracted with one or more recycling/disposal companies in each EU Member State European
Country, and this product should be disposed of or recycled through them. Further information on
Thermo’s compliance with this directive, the recyclers in your country and information on Thermo
products will be available at www.thermofisher.com.
4Always use the proper protective equipment (clothing, gloves, goggles, etc.)
4Always dissipate extreme cold or heat and wear protective clothing.
4Always follow good hygiene practices.
4Each individual is responsible for his or her own safety.

Thermo Scientificiv Environmental Chamber
Preface
Do You Need Information or Assistance on
Thermo Scientific Products?
If you do, please contact us 8:00 a.m. to 6:00 p.m. (Eastern Time) at:
1-740-373-4763 Direct
1-800-438-4851 Toll Free, U.S. and Canada
1-740-373-4189 FAX
http://www.thermo.com Internet Worldwide Web Home Page
Service E-Mail Address
Thermo Scientific
Controlled Environment Equipment
401 Millcreek Road, Box 649
Marietta, OH 45750
Our staff can provide information on pricing and give you quotations. We can
take your order and provide delivery information on major equipment items or make
arrangements to have your local sales representative contact you. Our products are listed on the
Internet and we can be contacted through our Internet home page.
Our staff can supply technical information about proper setup, operation or
troubleshooting of your equipment. We can fill your needs for spare or replacement parts or
provide you with on-site service. We can also provide you with a quotation on our Extended
Warranty for your Thermo Scientific products.
Whatever Thermo Scientific products you need or use, we will be happy to discuss your
applications. If you are experiencing technical problems, working together, we will help you
locate the problem and, chances are, correct it yourself...over the telephone without a service
call.
When more extensive service is necessary, we will assist you with direct factory trained
technicians or a qualified service organization for on-the-spot repair. If your service need is
covered by the warranty, we will arrange for the unit to be repaired at our expense and to your
satisfaction.
Regardless of your needs, our professional telephone technicians are available to assist you
Monday through Friday from 8:00 a.m. to 6:00 p.m. Eastern Time. Please contact us by
telephone or fax. If you wish to write, our mailing address is:
International customers, please contact your local Thermo Scientific distributor.
Sales Support
Service Support
[e-mail]

Thermo Scientific Environmental Chamber v
Preface
Warranty Notes
Information You Should Know Before Requesting Warranty Service
•Locate the model and serial numbers. A serial tag is located on the unit itself.
• For equipment service or maintenance, or with technical or special application inquiries, contact Technical
Services at 1-800-438-4851 or 1-740-373-4763 (USA and Canada). Outside the USA, contact your local
distributor.
Repairs NOT Covered Under Warranty
• Calibration of control parameters. Nominal calibrations are performed at the factory; typically ±1°C for
temperature, ±1% for gases, and ±5% for humidity. Our service personnel can provide precise calibrations as
a billable service at your location. Calibration after a warranty repair is covered under the warranty.
• Damage resulting from use of improper quality water, chemicals or cleaning agents detrimental to
equipment materials.
• Service calls for improper installation or operating instructions. Corrections to any of the following
are billable services:
1) electrical service connection
2) tubing connections
3) gas regulators
4) gas tanks
5) unit leveling
6) room ventilation
7) adverse ambient temperature fluctuations
8) any repair external to the unit
• Damage resulting from accident, alteration, misuse, abuse, fire, flood, acts of God, or improper
installation.
• Repairs to parts or systems resulting from unauthorized unit modifications.
• Any labor costs other than that specified during the parts and labor warranty period, which may
include additional warranty on CO2sensors, blower motors, water jackets, etc.

Environmental Chamber viThermo Scientific
Table of Contents
Installation and Set-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
Preliminary Cleaning and Disinfecting . . . . . . . . . . . . . . . . . . . . . . . .1-2
Installing the Shelves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
Leveling the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
Attaching the Drain Connections . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
Remote Data Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
Power Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
4-20 Milliamp Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
Remote Alarm Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Set Overtemp Safety Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Set Undertemp Safety Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
Prepare (Optional) CoBex Recorder . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
Change Chart Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
Change Pen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
Honeywell Recorder (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
IR CO2Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
Connect CO2Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
Set CO2Content . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8
CO2Control and Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8
Start-Up and Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Set the Operating Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
Air Exchange Ventilator Caps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
Heatless Dryer P/N 1900139 (optional) . . . . . . . . . . . . . . . . . . . . . .2-3
Routine Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
Section 1
Section 2
Section 3

vii Environmental Chamber Thermo Scientific
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Electrical Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Replace Over/ Undertemp Probe & Thermostat . . . . . . . . . . . . . . . .4-1
Replace Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Program Temperature Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Remove Mechanical Lockout . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Remove Software Lockout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
Controller Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4
Offset Calibration (Temperature) . . . . . . . . . . . . . . . . . . . . . . . . . .4-4
Turn Hardware Lockout Back On . . . . . . . . . . . . . . . . . . . . . . . . . .4-6
Replace Optional Recorder and Probe(s) . . . . . . . . . . . . . . . . . . . . . .4-6
Calibrate the Recorder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-7
Set the Door Heater Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-8
CO2Controller Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-8
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
Refrigeration Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
Electrical Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-1
Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-1
Recorder Supplement
Table of Contents
Section 4
Section 5
Section 6
Section 8
Section 7
Section 9
Appendix A

Environmental Chamber 1-1Thermo Scientific
Section 1 Installation and Set-Up
Figure 1-1. Front View Figure 1-2. Side View