Thermo Scientific 180 Series Operating instructions

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User Manual
Thermo Scientific Precision
General Purpose Water Baths
Model 180 Series
Operating and Maintenance Manual 3177889 Rev. G

Thermo Scientific
MANUAL NUMBER 3177889
G 31076 2/15 Added kerosene note ccs
F 27953/BA-738 4/12 Chg’d thermometer P/N to common one with other GP baths (321131) ccs
E 24571 5/08 Replaced thermostat part number with kit part number
D 23443, 23496 5/06 consolidated w/ 240V 3177692 manual, removed CE mark and declaration
C 6/05 36100124 (34002480), new manual #, manuafacture location
B 11/01 Update specs
A -- 6/99 Initial release
REV ECR/ECN DATE DESCRIPTION By
Preface
GP Water Baths i
Models Covered:
Model No.
180 (2823/2824)
181 (2827/2828)
182 (2831/2832)
183 (2835/2836)
184 (2839/2840)
185 (2843/2844)
186 (2847/2848)
188 (2851/2852)
The 240V units described in this manual were designed specifically for the
European market and are supplied with a European style power cord. for
domestic use, a U.S. style power cord (P/N 3176836) must be ordered sepa-
rately.

Thermo Scientificii GP Water Baths
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.
©1999 Thermo Fisher Scientific. All rights reserved.

Thermo Scientific GP Water Baths 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 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 GP Water Baths
Preface
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GP Water Baths vThermo Scientific
Table of Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Unpacking and Damage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Shelf Placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Bath Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-2
Filling Bath . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-2
Power ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-3
Bath Thermometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-3
Setting Thermostats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-4
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
Water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
Background . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
pH Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-2
Anti-Fungal -- Anti-Bacterial Additives . . . . . . . . . . . . . . . . . . . . . .6-2
Build-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-2
Prevention of Scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-2
Other Water Additives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-2
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-3
Chamber Disinfecting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-4
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
Heater Element Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
Replace Thermostat (Within the Pan) . . . . . . . . . . . . . . . . . . . . . . . .7-2
Replace Thermostat (Under the Pan) . . . . . . . . . . . . . . . . . . . . . . . . .7-3
Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-1
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-1
Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-1
Section 1
Section 2
Section 3
Section 4
Section 5
Section 6
Section 8
Section 7
Section 9
Section 10

GP Water Baths 1-1Thermo Scientific
Section 1 Introduction
Precision General Purpose Water Baths are designed for a wide variety of
serological research procedures as well as a broad range of other general
laboratory applications. Operation and maintenance of these baths are
covered in this manual; unless specifically noted otherwise, the
information provided applies to all available models.
Precision water baths feature a one-piece, deep-drawn stainless steel
chamber with welded and painted galvanized steel outer body. Depending
on the model, either one or two heaters are attached to the bottom of the
bath chamber. For faster temperature recovery and reduced power
consumption, the baths are equipped with a stainless steel cover (except
Model 2827/2828, which is equipped with a plastic cover). This cover
must be in place to reach and maintain 100°C.
All units (except Model 2823/2824) also feature an adjustable support
shelf which may be set at three different height levels by simply changing
the position of the legs. Model 2823/2824 is equipped with a non-
adjustable diffuser shelf.
As the ultimate user of this apparatus, it is your responsibility to
understand its proper function and operational characteristics. This
operating manual should be thoroughly read and all operators given
adequate training before attempting to place this unit in service. Awareness
of the stated cautions and warnings, and compliance with recommended
operating parameters - together with maintenance requirements - are
important for safe and satisfactory operation. The unit should be used for
its intended application; alterations or modifications will void the
warranty.
Warning As a routine laboratory precaution, always wear safety glasses
when working with this apparatus. s
Caution Model 2847/2848 and 2851/2852 water baths require two
persons to unpack and lift the product to bench height. s
Caution The bench top must be rigid and strong enough to comfortably
support the weight of the unit when filled with water. s

GP Water Baths 2-1Thermo Scientific
Section 2 Unpacking and Damage
This merchandise was carefully packed and thoroughly inspected; save all
packing material if apparatus is received damaged.
Responsibility for its safe delivery was assumed by the carrier upon
acceptance of the shipment; therefore, claims for loss or damage sustained
in transit must be made upon the carrier by the recipient as follows:
Visible Loss or Damage: Note any external evidence of loss or damage on
the freight bill, or express receipt, and have it signed by the carrier's agent.
Failure to adequately describe such external evidence of loss or damage
may result in the carrier's refusing to honor your damage claim. The form
required to file such a claim will be supplied by the carrier.
Concealed Loss or Damage: Concealed loss or damage means loss or
damage which does not become apparent until the merchandise has been
unpacked and inspected. Should either occur, make a written request for
inspection by the carrier's agent within 15 days of delivery date; then file a
claim with the carrier since the damage is the carrier's responsibility.
If you follow these instructions carefully, we guarantee our full support of
your claim to be compensated for loss from concealed damage.
DO NOT, FOR ANY REASON , RETURN THIS UNIT WITHOUT
FIRST OBTAINING AUTHORIZATION. In any correspondence to
Thermo, supply the nameplate data, including catalog number and serial
number.

GP Water Baths 3-1Thermo Scientific
Section 3 Specifications
Precision General Purpose Water Baths feature the following parameters.
Volume calculations are based using water level approximately 1" (25mm)
from the chamber top.
Catalog
Number Model Number
Electrical Characteristics Capacity 230V Units
Power Supply
Mains Fuse
Volts Watts Amps Liters Gallons
3166711
3166712 2823/2824 120
230 225 1.9 1.0 1.5 0.4 FST-5x20-1.0A
3166706
3166821 2827/2828 120
230 225 1.9 1.0 2.5 0.7 FST-5x20-1.0A
3166714
3166709 2831/2832 120
230 300 2.5 1.3 5.5 1.5 FST-5x20-2.0A
3166702
3166704 2835/2836 120
230 400 3.3 1.7 12.0 3.2 FST-5x20-2.0A
3166716
3166710 2839/2840 120
230 600 5.0 2.6 19.5 5.2 FST-5x20-3.15A
3166707
3166708 2843/2844 120
230 600 5.0 2.6 18.0 4.9 FST-5x20-3.15A
3166713
3166715 2847/2848 120
230 1200 10.0 5.2 43.0 11.4 FST-5x20-6.3A
3166703
3166705 2851/2852 Dual 120
230 800 6.7 3.5
12.0
both pans
3.2
both pans FST-5x20-4.0A

GP Water Baths 4-1Thermo Scientific
Section 4 Installation
To obtain the most uniform operating conditions and results, place the
bath in an area remote from drafts, ventilation outlets, radiators, and other
rapidly changing ambient conditions.
To assure proper ventilation, allow at least 4" clearance between the rear,
top, and sides of the unit and adjacent wall. If two or more units are
positioned side-by-side, allow at least 8" between them.
Environmental Conditions
This instrument is designed to operate safely under the following
conditions:
• Indoor Use Only
• Temperature: 5° to 40°C
• Maximum Relative Humidity: 80% for temperatures to 22°C
• Maximum Altitude 2000 meters
Maximum performance is assured across the following temperature range:
• 15°C to 45°C

4-2 GP Water Baths Thermo Scientific
Section 4
Installation
Electrical
Connections
Important Please read carefully. s
Warning For personal safety, this apparatus must be properly grounded. s
Caution Be sure that the power supply is of the same voltage as specified
on the nameplate.
Be sure that the wall receptacle is readily identifiable and easily reached to
disconnect the unit from the power source. s
The power cord of this instrument is equipped with a three-prong
(grounding) plug which mates with a standard three-prong (grounding)
wall receptacle to minimize the possibility of electric shock hazard. The
user should have the wall receptacle and circuit checked by a qualified
electrician to make sure the receptacle is properly grounded. Where a two-
prong receptacle is encountered, it is the personal responsibility and
obligation of the user to have it replaced with a properly grounded three-
prong receptacle.
Warning Do not, under any circumstances, cut or remove the third
(ground) prong from the power cord. Do not use a two-prong adapter
plug. s
Determine the total amount of current presently being used by other
equipment connected to the circuit that will be used for this unit. It is
critical that the added current demand by this appliance and other
equipment on the circuit not exceed the rating of the fuse or circuit
breaker in use.

Section 5 Operation
Caution Exercise care when using acidic or caustic solutions as they will
attack the galvanized steel bath body if spilled into the bath. If spills do
occur, the bath liquid should be immediately drained and the unit
thoroughly flushed. Spills and condensation should be cleaned/removed
from all metal surfaces after each use. s
Warning Explosion, implosion or the release of toxic or flammable gases
arising from material being heated is the sole responsibility of the user. s
Place the stainless steel metal shelf also called diffuser shelf, (corners facing
downward) inside the bath chamber. The shelf provides a sample base and
protects samples from touching the hot metal bath bottom.
If it is necessary to increase the height of the diffuser shelf, a Leg Extension
Kit is included for this purpose. Model 2823/2824 is excluded.
Following the figure shown below, attach the four extension legs to each of
the four corners of the diffuser shelf.
GP Water Baths 5-1Thermo Scientific
Shelf Placement
Figure 5-1. Attach Extension Legs
Diffuser Shelf
Leg Extension Kit

5-2 GP Water Baths Thermo Scientific
Section 5
Operation
Note Distilled water is recommended; it will not corrode the bath chamber
and it reduces the need for frequent bath cleaning. s
DO NOT USE 18M DEIONIZED WATER. Note If this is the only
source of treated water available; mix 50% with regular tap water. s
Before filling, check the power switch and make sure that it is in "OFF"
position.
Fill the bath with distilled water, making allowance for displacement by
the sample(s) being immersed and for expansion of the media upon
reaching operating temperature.
For Model 2827/2828 and above, the maximum liquid level should be
1½" from the top surface of the bath after sample(s) are immersed. For
Model 2823/2824, the maximum liquid level should be ¾" from the top
of the bath.
To conserve energy and reduce evaporation, use the cover supplied with
the bath throughout the temperature range of the bath. This cover must
be in place to reach and maintain 100°C.
Caution Do not use aluminum foil as a cover; it may cause corrosion of the
stainless steel as a result of an electrolytic reaction. s
Caution When operating at temperatures greater than 60ºC, Do not touch
metal surface of gable cover. lift gable cover by knob only. s
Note As water baths are operated, especially at elevated temperatures,
condensation forms on the underside of the gable cover. The amount of
condensation can be considerable. EXERCISE Care When removing the
cover so that water falls back into bath chamber, and not on bath surface.
The cover should be placed upside down when removed to maintain a dry
work area. s
Filling Bath
Bath Cover

Each bath is supplied with a thermometer and O-ring (packed separately).
The thermometer is attached to the bath via a metal clip on the top of the
bath.
Slip the O-ring onto the thermometer; insert this assembly through the
metal clip until the immersion depth indicator line is at or below the water
surface. The thermometer bulb should always be located above the diffuser
shelf.
Caution Care should be taken to protect the thermometer from accidental
breakage and spillage of contents. The thermometer contains kerosene and
is not expected to be a health hazard in the normal intended use of the
thermometer. s
Insert the line cord into the proper receptacle and turn the power switch
to the "ON" position. This action energizes the heater and causes the
amber pilot lamp to light. The pilot lamp will stay lighted as long as the
heater(s) is energized.
GP Water Baths 5-3Thermo Scientific
Section 5
Operation
Bath Thermometer
Power ON
Off
0
On
1
2
10
0
10
91
82
9
8
5
4
3
4
6
73
6
7
5
Figure 5-2. Control Panel

Note Dial numbers on front panel are for reference only; they are not
values for water temperature within the unit. s
Warning Do not leave the bath unattended during setting procedure. s
1. Turn both the Temperature Control and High Temperature Limit
thermostat knobs fully clockwise. The Temperature Control Pilot lamp
should illuminate.
2. When the bath temperature reaches the desired temperature, slowly
turn the High Temperature Limit Thermostat counterclockwise and
stop when the High Temperature Limit Pilot Lamp illuminates.
3. Turn the High Temperature Limit Thermostat Knob clockwise to next
highest reference number. The High temperature Limit light should go
off. The High Temperature Limit thermostat is now set approximately
5° above the desired bath temperature.
4. Turn the Temperature Control Thermostat counterclockwise until
both pilot lamps are off.
5. Turn the Temperature Control thermostat clockwise until the
Temperature Control pilot lamp just lights. Allow the unit to stabilize,
re-adjust/fine-tune the Temperature Control thermostat as necessary.
5-4 GP Water Baths Thermo Scientific
Section 5
Operation
Setting Thermostats

Section 6 Maintenance
Warning Unit must be disconnected from power source prior to servicing.
It is recommended that all service be performed by qualified service
personnel. s
Caution Electrolysis can damage stainless steel. This can occur if an object
is allowed to rest directly on the surface, trapping moisture that becomes
oxygen starved but is surrounded by water containing oxygen. The
resulting electrolytic action will pit or corrode the stainless steel. s
Stainless steel is an alloy of steel with chromium and nickel which increase
the metal's resistance to rust and corrosion. However, if not properly cared
for it can rust and corrode. Exposure to air provides the passivations for
clean stainless steel. This exposure produces a thin, durable chromium-
oxide film that forms rapidly on the alloy surface and gives stainless steel
its characteristic "stainless" quality. Exposure of the surface to water other
oxidizing environments also produces this passivating film. However, if
free oxygen is not available due to scale or contamination buildup, the
metal surface may become vulnerable to attack.
Maintaining a neutral pH and frequent cleaning with detergent and water
will give you years of trouble-free service for your water bath. The
following are some guidelines to keep in mind.
Distilled water is recommended. Maintain pH between 7 and 9 to
minimize corrosion of the stainless steel.
De-ionized or reverse-osmosis water may be used. However, if this water
is very pure, it may be corrosive to stainless steel; and in such cases always
add 20-40 ppm (20 to 40 mg/liter) disodium phosphate or sodium
bicarbonate. Adjust dosage to give a pH of 7 to 9. See "pH Control"
below.
If the above water is not available, clean, aerated soft tap water may be
used, provided the total solids concentration is <500 ppm.
GP Water Baths 6-1Thermo Scientific
Background
Water