Thermo Scientific 3050 User manual

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User Manual
Model 3050/3052
Gas Guard
Operating and Maintenance Manual 7013050 Rev. 5

Thermo Scientific
MANUAL NUMBER 7013050
5 31031/31321/IN-4552 12/4/15 Updated specifications, parts list, schematics ccs
4 23451/IN-3294 6/30/06 Added ±5 psig to incoming CO2 pressure range ccs
3 -- 9/29/03 Clarified description (power failure on Gas Guard) ccs
- 20325/IN-2981 9/6/01 Release 3 updated declaration of conformity aks
2 20302 8/16/01 Electrical mains connection and service revisions aks
1 19988/IN-2929 4/23/01 Elec. Schematics and specifications updated aks
- IN-2200 12/12/96 Additional updates for 1010 heg
- SI-5967 12/12/96 Added RJ-11 wiring color codes heg
- 15794 12/12/96 Added Alarm system warning heg
0 12/3/96 Updated for 1010 and FLA Ratings deg
REV ECR/ECN DATE DESCRIPTION By
Preface
Model 3050/3052 i
Caution Model 3050/3052 Gas Guard is designed to be used with CO2and N2only. s

Thermo Scientificii Model 3050/3052
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
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 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.
©1996 Thermo Fisher Scientific. All rights reserved.

Thermo Scientific Model 3050/3052 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.
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 Fisher
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 Scientific 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 Model 3050/3052
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.thermoscientific.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.

Model 3050/3052 vThermo Scientific
Table of Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Installation and Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Connect the Gas Outlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Connect the Gas Tanks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Start-Up Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
Connect Gas Guard to Power Source . . . . . . . . . . . . . . . . . . . . . . . .2-2
Control & Indicating Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Maintenance and Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
Electrical Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-1
Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-1
Section 1
Section 2
Section 3
Section 4
Section 5
Section 6
Section 8
Section 7
Section 9

Model 3050/3052 1-1Thermo Scientific
Location
Section 1 Introduction
Model 3050/3052 Gas Guard is a monitoring and switching device for
CO2and N2gas supplies. The unit will monitor a two cylinder gas
supply. When the active supply tank is depleted, an audible alarm sounds
and the gas guard automatically switches to the second tank. The audible
alarm is silenced by manually switching the SILENCE switch to the other
tank position.
Power failure stops the automatic tank switching operation of the Gas
Guard. Gas will continue to flow from Tank #1 in a power failure, if the
tank is not empty. An Uninterrupted Power Source is recommended to
ensure continuous gas flow, no matter which tank is in service at the time
of power failure.
Located on the back of the unit, a voltage selector switch permits the
appropriate voltage selection (115V/230V). The unit is also equipped with
a single remote alarm contact that monitors alarm conditions such as an
empty supply tank, or a power failure to the unit.
Caution Model 3050/3052 Gas Guard is designed to be used with CO2
and N2only. s
Locate Model 3050/3052 on a level surface. Provide adequate space near
the incubator for storage of the CO2or N2cylinders.
Warning O.S.H.A. Regulations have been established for the handling,
storage, and use of high pressure gas storage cylinders. Consult the latest
edition of the O.S.H.A. Regulations to ensure compliance with all safety
requirements. Also, consult all applicable state and local regulations. s

Model 3050/3052 2-1Thermo Scientific
Section 2 Installation and Start-Up
Connect a regulated gas supply to each of the two inlet fittings located on
the back of the unit. The fittings are labeled. Refer to Figure 2-1. A filter
(Stock No. 770001) is recommended to be installed on each of the inlet
connections. Check the connections for leaks.
The gas outlet is located between the inlet fittings. Refer to Figure 2-1.
Connect the supply tubing to the barbed outlet and connect the other end
to the incubator or other piece of equipment requiring a gas supply. Check
the gas outlet for a possible leak.
TANK 1
15 PSI
REGULATED
ALARM
CONTACTS
30V, 1A MAX.
TANK 2
15 PSI
REGULATED
OUTLET
VOLTAGE
SELECT
115V
Figure 2-1. Rear View
Connect the Gas
Tanks
Connect the Gas
Outlet