Thermo Scientific 3920 User manual

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User Manual
Forma Environmental Chamber
Model 3920
Operating and Maintenance Manual 7063920 ev. 12

Thermo Scientific
MANUAL NUMBE 7063920
12 40398 4/20/17 Updated 3920 electrical schematics bpg
11 40639 5/9/16 Added risk assessment information ccs
10 40356/40509/ 3/18/16 Updates to fuses, accessory outlet, electrical schematics ccs
40638/IN-4670
9 40638 1/26/16 Added wall anchor information to pg 1-2 ccs
8 40018 2/10/15 Added drain figure to pg 1-3 ccs
7 28882/IN-4244 9/24/14 Updated drains in assembly drawing 3920-00 ccs
-- 31358/IN-4569 7/24/14 Door light option part number is now 1900604 ccs
6 30415 10/14/13 Added instructions for left hand door access to control panel and recorder install ccs
Preface
Environmental Chamber i

Thermo Scientificii Environmental Chamber
Preface
Contains Parts and Assemblies
Susceptible to Damage by
Electrostatic Discharge (ESD)
CAUTION
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
Warning All internal adjustments and maintenance must be performed by qualified service personnel. s
• Use this product only in the way described in the product literature and in this manual. Before
using it, verify that this product is suitable for the intended use.
• Do not modify system components, especially the controller. Use O M exact replacement
equipment or parts. Before use, confirm that the product has not been altered in any way.
• Disconnect the unit from all power sources before cleaning, troubleshooting, or performing
other maintenance on the product or its controls. To disconnect power supply to the incubator,
unplug the supply cord at the back of the incubator. Note that turning the key switch on the
front control panel to the Off position is not sufficient to disconnect power.
Warning The user is responsible for carrying out appropriate decontamination procedures when hazardous
materials are spilled on or inside the incubator. s
Caution If the incubator is not used in the manner specified in this operating manual, the protection provided
by the equipment design may be impaired. s
Material in this manual 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 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.
©2011 Thermo Fisher 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.
quipment being maintained or serviced must be turned off and locked off to prevent possible injury.
Asphyxiation Hazard Warning. High concentrations of CO2 and N2 can displace oxygen and cause
asphyxiation!
Lifting Hazard Warning. The incubator weighs more than 200lbs (91kgs). Take adequate safety
measures when moving this device.
W Compliance: Thermo Fisher Scientific has contracted with companies for recycling/disposal in
each U Member State. For further information, send an email to [email protected].
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.
4ach 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
1-877-213-8051 FAX
http://www.thermofisher.com Internet Worldwide Web Home Page
[e-mail] Tech Support Email Address
Certified Service Web Pagewww.unitylabservices.com
Our staff can provide information on pricing and give you quotations. We canSales Support
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 orService Support
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:
Thermo Fisher Scientific (Asheville) LLC
401 Millcreek Road, Box 649
Marietta, OH 45750
International customers, please contact your local Thermo Scientific distributor.

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Preliminary Cleaning and Disinfecting . . . . . . . . . . . . . . . . . . . . . . .1-2
Installing the Shelves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
Installing the Wall Anchors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
Attaching the Drain Connections . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
Leveling the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
4-20 Milliamp Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
Remote Alarm Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Power Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Set Overtemp Safety Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Set Overtemp Safety Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
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
Access Control Panel w/ Left Hand Door Swing . . . . . . . . . . . . . . . .1-7
IR CO2Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
Connect CO2Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
Set CO2Content . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8
CO2Control and Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8
Accessory Outlet (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9
Door Light (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9
Start-Up and Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Set the Operating Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
Air xchange Ventilator Caps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
outine Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Section 1
Section 2
Section 3

vii Environmental Chamber Thermo Scientific
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
lectrical Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Fuse Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Repl. Over/ Undertemp Probe & Thermostat . . . . . . . . . . . . . . . . . .4-1
Replace Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Program Temperature Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Remove Software Lockout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
Restore Software Lockout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4
Controller Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4
Offset Calibration (Temperature) . . . . . . . . . . . . . . . . . . . . . . . . . .4-4
Replace Optional Recorder and Probe(s) . . . . . . . . . . . . . . . . . . . . . .4-5
Set the Door Heater Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-6
CO2Controller Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-6
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
efrigeration Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
Electrical Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-1
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-7
Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-1
Table of Contents
Section 4
Section 5
Section 6
Section 8
Section 7
Section 9

Environmental Chamber 1-1Thermo Scientific
Section 1 Installation and Set-Up
Figure 1-1. Front View Figure 1-2. Side View
Locate the unit on a firm, level surface in an area of minimum ambient
temperature fluctuation. A minimum of six (6) inches clearance is required
at the top and back of the incubator, plus a minimum three (3) inch
clearance on each side. This space is necessary to allow adequate air flow
around the refrigeration system. At least eight (8) inches of clearance is
required at the top of the incubator for service access.
Location

610105
5/16-18 UNC
STAINLESS STEEL
RIVNUT
3176856
5/16-18 x 1”
HH FULL THREAD
SS CAP SCREW
23036
5/16 INT. TOOTH
LOCKWASHER
Figure 1-3. Wall Anchor Installation
Warning To prevent
tipping, install the wall
anchors and secure the
unit before using. s
1-2 Environmental Chamber Thermo Scientific
Section 1
Installation and Set-Up
Disinfect all interior surfaces with a general-use laboratory disinfectant,
such as quaternary ammonium, to remove any residues which may remain
from production of the incubator. Rinse thoroughly with sterile distilled
water, then 70% ethanol. Dry with a sterile cloth as needed.
Caution Before using any cleaning or decontamination method except
those recommended by the manufacturer, users should check with the
manufacturer that proposed method will not damage the equipment. s
The shelves may be installed at any level in the incubator. Install a shelf
channel on each side. With the tabs pointing up, attach the channel by
locating the rivet into a slotted hole, far end first. Pull the channel toward
the front and slide the front rivet on the channel into the slotted hole and
press down. Make sure that the channels are opposite each other so that
the installed shelf will be level.
Preliminary Cleaning
and Disinfecting
Installing the Shelves
Installing the Wall
Anchors
The unit has two wall anchor studs located in the left and right side of
the cabinet. Use the provided 5/16” bolts to secure the wall anchors to
each side of the cabinet top. Anchors that connect between the cabinet
sides to facility wall are customer supplied.
Note Wall anchors are required to meet UL Tip Test Safety Standards.
Figure 1-4. Shelf Channels