Installation/Service ManualGeneral Purpose Water Baths

Models 180 (2823/2824), 181 (2827/2828), 182 (2831/2832),183 (2835/2836), 184 (2839/2840), 185 (2843/2844),

186 (2847/2848), 188 (2851/2852)

Thermo Scientific401 Millcreek Road, Box 649Marietta, Ohio 45750USAPhone: 740-373-4763Toll Free: 888-21-1790FAX: 740-373-4189

Manual P/N 3177889Rev E Dated 06MAY08

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NOTICE

THE MATERIAL IN THIS MANUAL IS FOR INFORMATION PURPOSES ONLY. THE CONTENTSAND THE PRODUCT IT DESCRIBES ARE SUBJECT TO CHANGE WITHOUT NOTICE. THERMOSCIENTIFIC MAKES NO REPRESENTATIONS OR WARRANTIES WITH RESPECT TO THISMANUAL. IN NO EVENT SHALL THERMO BE LIABLE FOR ANY DAMAGES, DIRECT ORINCIDENTAL, ARISING OUT OF OR RELATED TO THE USE OF THIS MANUAL.

For repair information or replacement parts assistance from the manufacturer,call Technical Services using our toll free telephone number.

888-213-1790(FAX) 740-373-4189

NOTE:

THE 240V UNITS DESCRIBED IN THIS MANUAL WERE DESIGNED SPECIFICALLY FORTHE EUROPEAN MARKET AND ARE SUPPLIED WITH A EUROPEAN STYLE POWERCORD. FOR DOMESTIC USE, A U.S. STYLE POWER CORD (P/N: 3176836) MUST BEORDERED SEPERATELY.

Initial release6/99A

INDEX DATE AMENDED PAGES NOTES

REVISION STATUS

Update specs

new manual #, manufacture location

consolidated with 240V 3177692manual, removed CE and declaration

replaced thermostat part number withkit part number

11/01

6/05

5/06

5/08

B

C

D

E

2

36100124 (34002480)

ECRs 23443 & 23496

ECR 24571

Contents1. Introduction .................................................................................................................... 1

2. Unpacking and Damage................................................................................................. 1

3. Specifications ................................................................................................................. 2

4. Installation ...................................................................................................................... 3

5. Operation ........................................................................................................................ 3

6. Maintenance.................................................................................................................... 6

7. Service ............................................................................................................................ 8

8. Replacement Parts List................................................................................................ 10

9. Assembly and Schematic Drawings ........................................................................... 11

10. Warranty ...................................................................................................................... 14

1

1. INTRODUCTION

Precision General Purpose Water Baths aredesigned for a wide variety of serological researchprocedures as well as a broad range of othergeneral laboratory applications. Operation andmaintenance of these baths are covered in thismanual; unless specifically noted otherwise, theinformation provided applies to all available models.

Precision water baths feature a one-piece, deep-drawn stainless steel chamber with welded andpainted galvanized steel outer body. Dependingon the model, either one or two heaters are attachedto the bottom of the bath chamber. For fastertemperature recovery and reduced powerconsumption, the baths are equipped with astainless steel cover (except Model 2827/2828,which is equipped with a plastic cover). This covermust be in place to reach and maintain 100°C.

All units (except Model 2823/2824) also feature anadjustable support shelf which may be set at threedifferent height levels by simply changing the positionof the legs. Model 2823/2824 is equipped with anon-adjustable diffuser shelf.

As the ultimate user of this apparatus, it is yourresponsibility to understand its proper function andoperational characteristics. This instruction manualshould be thoroughly read and all operators givenadequate training before attempting to place thisunit in service. Awareness of the stated cautionsand warnings, and compliance with recommendedoperating parameters - together with maintenancerequirements - are important for safe andsatisfactory operation. The unit should be used forits intended application; alterations or modificationswill void the warranty.

WARNINGAS A ROUTINE LABORATORY PRECAUTION,ALWAYS WEAR SAFETY GLASSES WHENWORKING WITH THIS APPARATUS.

CAUTIONMODEL 2847/2848 AND 2851/2852 WATERBATHS REQUIRE TWO PERSONS TO UNPACKAND LIFT THE PRODUCT TO BENCH HEIGHT.

CAUTIONTHE BENCH TOP MUST BE RIGID AND STRONGENOUGH TO COMFORTABLY SUPPORT THEWEIGHT OF THE UNIT WHEN FILLED WITHWATER.

2. UNPACKING AND DAMAGE

This merchandise was carefully packed andthoroughly inspected; save all packing material ifapparatus is received damaged.

Responsibility for its safe delivery was assumed bythe carrier upon acceptance of the shipment;therefore, claims for loss or damage sustained intransit must be made upon the carrier by therecipient as follows:

Visible Loss or Damage: Note any externalevidence of loss or damage on the freight bill, orexpress receipt, and have it signed by the carrier'sagent. Failure to adequately describe such externalevidence of loss or damage may result in thecarrier's refusing to honor your damage claim. Theform required to file such a claim will be supplied bythe carrier.

Concealed Loss or Damage: Concealed loss ordamage means loss or damage which does notbecome apparent until the merchandise has beenunpacked and inspected. Should either occur,make a written request for inspection by thecarrier's agent within 15 days of delivery date; thenfile a claim with the carrier since the damage is thecarrier's responsibility.

If you follow these instructions carefully, weguarantee our full support of your claim to becompensated for loss from concealed damage.

DO NOT, FOR ANY REASON , RETURN THISUNIT WITHOUT FIRST OBTAININGAUTHORIZATION. In any correspondence toThermo, please supply the nameplate data,including catalog number and serial number.

2

3. SPECIFICATIONS

Precision General Purpose Water Baths feature the following parameters. Volume calculations arebased using water level approximately 1" (25mm) from the chamber top.

CatalogNumber

ModelNumber

Electrical Characteristics Capacity 230V UnitsPower Supply

Mains FuseVolts Watts Amps Liters Gallons

31667113166712

2823/2824

120230 225 1.9

1.0 1.5 0.4 FST-5x20-1.0A

31667063166821

2827/2828

120230 225 1.9

1.0 2.5 0.7 FST-5x20-1.0A

31667143166709

2831/2832

120230 300 2.5

1.3 5.5 1.5 FST-5x20-2.0A

31667023166704

2835/2836

120230 400 3.3

1.7 12.0 3.2 FST-5x20-2.0A

31667163166710

2839/2840

120230 600 5.0

2.6 19.5 5.2 FST-5x20-3.15A

31667073166708

2843/2844

120230 600 5.0

2.6 18.0 4.9 FST-5x20-3.15A

31667133166715

2847/2848

120230 1200 10.0

5.2 43.0 11.4 FST-5x20-6.3A

31667033166705

2851/2852Dual

120230 800 6.7

3.512.0

Both Pans3.2

Both Pans FST-5x20-4.0A

3

4. INSTALLATION

4.1 LocationTo obtain the most uniform operating conditionsand results, place the bath in an area remote fromdrafts, ventilation outlets, radiators, and other rapidlychanging ambient conditions.

To assure proper ventilation, allow at least 4" clear-ance between the rear, top, and sides of the unit andadjacent 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 safelyunder 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 thefollowing temperature range:

• 15ºC to 45ºC

4.2 Electrical Connections

IMPORTANT : PLEASE READ CAREFULLY.

WARNING:FOR PERSONAL SAFETY, THIS APPARATUSMUST BE PROPERLY GROUNDED.

CAUTION:BE SURE THAT THE POWER SUPPLY IS OFTHE SAME VOLTAGE AS SPECIFIED ON THENAMEPLATE.

BE SURE THAT THE WALL RECEPTACLE ISREADILY IDENTIFIABLE AND EASILYREACHED TO DISCONNECT THE UNIT FROMTHE POWER SOURCE

The power cord of this instrument is equipped witha three-prong (grounding) plug which mates with astandard three-prong (grounding) wall receptacleto minimize the possibility of electric shock hazard.The user should have the wall receptacle andcircuit checked by a qualified electrician to makesure the receptacle is properly grounded. Where atwo-prong receptacle is encountered, it is thepersonal responsibility and obligation of the user tohave it replaced with a properly grounded three-prong receptacle.

WARNING:DO NOT, UNDER ANY CIRCUMSTANCES, CUT ORREMOVE THE THIRD (GROUND) PRONG FROMTHE POWER CORD. DO NOT USE A TWO-PRONGADAPTER PLUG.

Determine the total amount of current presentlybeing used by other equipment connected to thecircuit that will be used for this unit. It is critical thatthe added current demand by this appliance andother equipment on the circuit not exceed therating of the fuse or circuit breaker in use.

5. OPERATION

CAUTIONEXERCISE CARE WHEN USING ACIDIC ORCAUSTIC SOLUTIONS AS THEY WILL ATTACKTHE GALVANIZED STEEL BATH BODY IF SPILLEDINTO THE BATH. IF SPILLS DO OCCUR, THEBATH LIQUID SHOULD BE IMMEDIATELYDRAINED AND THE UNIT THOROUGHLYFLUSHED. SPILLS AND CONDENSATION SHOULDBE CLEANED/REMOVED FROM ALL METALSURFACES AFTER EACH USE.

WARNINGEXPLOSION, IMPLOSION OR THE RELEASE OFTOXIC OR FLAMMABLE GASES ARISING FROM THEMATERIAL BEING HEATED IS THE SOLERESPONSIBILITY OF THE USER.

4

5.1 Shelf Placement

Place the stainless steel metal shelf also calleddiffuser shelf, (corners facing downward) insidethe bath chamber. The shelf provides a samplebase and protects samples from touching the hotmetal bath bottom.

If it is necessary to increase the height of thediffuser shelf, a Leg Extension Kit is included forthis purpose. Model 2823/2824 is excluded.

Following the figure shown below, attach the fourextension legs to each of the four corners of thediffuser shelf.

For Model 2827/2828 and above, the maximumliquid level should be 1-1/2" from the top surface ofthe bath after sample(s) are immersed. For Model2823/2824, the maximum liquid level should be3/4" from the top of the bath.

5.3 Bath Cover

To conserve energy and reduce evaporation, usethe cover supplied with the bath throughout thetemperature range of the bath. This cover must bein place to reach and maintain 100°C.

CAUTIONDO NOT USE ALUMINUM FOIL AS A COVER;IT MAY CAUSE CORROSION OF THESTAINLESS STEEL AS A RESULT OF ANELECTROLYTIC REACTION.

CAUTIONWHEN OPERATING AT TEMPERATURESGREATER THAN 60ºC, DO NOT TOUCH METALSURFACE OF GABLE COVER. LIFT GABLECOVER BY KNOB ONLY.

NOTEAS WATER BATHS ARE OPERATED,ESPECIALLY AT ELEVATED TEMPERATURES,CONDENSATION FORMS ON THEUNDERSIDE OF THE GABLE COVER. THEAMOUNT OF CONDENSATION CAN BECONSIDERABLE. EXERCISE CARE WHENREMOVING THE COVER SO THAT WATERFALLS BACK INTO BATH CHAMBER, AND NOTON BATH SURFACE. THE COVER SHOULDBE PLACED UPSIDE DOWN WHEN REMOVEDTO MAINTAIN A DRY WORK AREA.

5.4 Bath ThermometerEach bath is supplied with a thermometer and O-ring(packed separately). The thermometer is attached tothe bath via a metal clip on the top of the bath.

Slip the O-ring onto the thermometer; insert thisassembly through the metal clip until the immersiondepth indicator line is at or below the water surface.The thermometer bulb should always be locatedabove the diffuser shelf.

CAUTION:CARE SHOULD BE TAKEN TO PROTECT THETHERMOMETER FROM ACCIDENTALBREAKAGE AND SPILLAGE OF CONTENTS.

5.2 Filling Bath NOTE:

DISTILLED WATER IS RECOMMENDED; IT WILLNOT CORRODE THE BATH CHAMBERAND IT REDUCES THE NEED FOR FREQUENTBATH CLEANING.

DO NOT USE 18 MEG DEIONIZED WATER.NOTE: If this is the only source of treated wateravailable; mix 50% with regular tap water.

Before filling, check the power switch and makesure that it is in the "OFF" position.

Fill the bath with distilled water, making allowancefor displacement by the sample(s) being immersedand for expansion of the media upon reachingoperating temperature.

DIFFUSER SHELFLEG EXTENSION KIT

5

5.5 Power ONInsert the line cord into the proper receptacle andturn the power switch to the "ON" position. Thisaction energizes the heater and causes the amberpilot lamp to light. The pilot lamp will stay lighted aslong as the heater(s) is energized.

Off

0

On

1

2

10010

9 1

8 2

9

8

54

3

46

7 3

6

7

5

Figure 5.1 Controls

6

5.6 Setting Thermostats

NOTE:DIAL NUMBERS ON FRONT PANEL ARE FORREFERENCE ONLY; THEY ARE NOT VALUESFOR WATER TEMPERATURE WITHIN THE UNIT.

WARNING:DO NOT LEAVE THE BATH UNATTENDEDDURING THE SETTING PROCEDURE.

A. Turn both the Temperature Control and HighTemperature Limit thermostat knobs fullyclockwise. The Temperature Control Pilot lampshould illuminate.

B. When the bath temperature reaches the desiredtemperature, slowly turn the High TemperatureLimit Thermostat counterclockwise and stopwhen the High Temperature Limit Pilot Lampilluminates.

C. Turn the High Temperature Limit ThermostatKnob clockwise to next highest reference number.The High temperature Limit light should go off.The High Temperature Limit thermostat is nowset approximately 5° above the desired bathtemperature.

D. Turn the Temperature Control Thermostatcounterclockwise until both pilot lamps are off.

E. Turn the Temperature Control thermostatclockwise until the Temperature Control pilotlamp just lights. Allow the unit to stabilize,readjust/fine tune the Temperature Controlthermostat as necessary.

6. MAINTENANCE

WARNING:UNIT MUST BE DISCONNECTED FROMPOWER SOURCE PRIOR TO SERVICING. ITIS RECOMMENDED THAT ALL SERVICE BEPERFORMED BY QUALIFIED SERVICEPERSONNEL.

CAUTION:ELECTROLYSIS CAN DAMAGE STAINLESSSTEEL. THIS CAN OCCUR IF AN OBJECT ISALLOWED TO REST DIRECTLY ON THESURFACE, TRAPPING MOISTURE THATBECOMES OXYGEN STARVED BUT ISSURROUNDED BY WATER CONTAININGOXYGEN. THE RESULTING ELECTROLYTICACTION WILL PIT OR CORRODE THESTAINLESS STEEL.

BackgroundStainless steel is an alloy of steel with chromiumand nickel which increase the metal's resistance torust and corrosion. However, if not properly caredfor it can rust and corrode. Exposure to air providesthe passivations for clean stainless steel. Thisexposure produces a thin, durable chromium-oxidefilm that forms rapidly on the alloy surface andgives stainless steel its characteristic "stainless"quality. Exposure of the surface to water otheroxidizing environments also produces thispassivating film. However, if free oxygen is notavailable due to scale or contamination buildup, themetal surface may become vulnerable to attack.

Maintaining a neutral pH and frequent cleaningwith detergent and water will give you years oftrouble-free service for your water bath. The follow-ing are some guidelines to keep in mind.

WaterDistilled water is recommended. Maintain pHbetween 7 and 9 to minimize corrosion of thestainless steel.

De-ionized or reverse-osmosis water may be used.However, if this water is very pure, it may becorrosive to stainless steel; and in such casesalways 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 "pHControl" below.If the above water is not available, clean, aeratedsoft tap water may be used, provided the totalsolids concentration is <500 ppm.

7

pH ControlBe sure to check pH regularly. If pH is <6.0, adddisodium phosphate to increase pH to a 7 to 9value. Sodium carbonate or sodium bicarbonatemay be used but tend to form scale which must berinsed out regularly. If pH is >10.0 add sodiumbisulfate to decrease pH to a 7 to 9 value. Avoidadding harsh alkalines or acids since they maycause localized corrosion and result in unstable pH.

Anti-Fungal -- Anti-Bacterial AdditivesThese additives are permissible to use as long asthe pH of the aqueous solution is kept within therange of 7 to 9. Some of these are available throughyour supply dealer. Be sure they are not harmful tostainless steel.

Prevention of Scale BuildupAdditives commonly available for use in swimmingpools and spas may be acceptable in circulatingbaths only. In static baths, these are generally noteffective. This is why it is best to use distilled,deionized or RO water treated as described in"WATER" above. If scale buildup is detected(especially around immersion heaters), clean thebath and replace water as soon as practical.

Other Water AdditivesProper maintenance of the stainless steel bathchamber will help assure many years of service.

It should be cleaned regularly with mild soapywater and rinsed with distilled water.

IMPORTANT: If it is necessary to use the followingchemicals, limit the exposure time to a maximum offour hours. Clean surfaces immediately after useby rinsing with distilled water.

Aluminum Chloride Barium ChlorideBichloride of Mercury Calcium ChlorideCarbolic Acid Chlorinated LimeCitric Acid (boiling) Dakin's SolutionFerrous Chloride Mercury SaltsLysol Mercuric Chloride PhenolPotassium Permanganate Stannous ChlorideSodium Hypochlorite Tartaric AcidPotassium Thiocyanate Lysol

NEVER USE THE FOLLOWING Aqua Regia Ferric Chloride Iodine Sodium Azide Sulfuric Acid

6.1 CleaningSpills of any chemical, especially those listed aboveshould be removed as soon as possible and thestainless steel surface cleaned with mild soapywater followed by copious rinse with clean water.Do not use soap filled or metallic pads. Evenstainless steel pads are to be avoided as they maydestroy the passive film on the surface of the metaland create crevices that may harbor contamination.If stubborn stains persist, use a plastic light dutycleansing pad and rub gently in the direction of themetal grain. If stains continue to persist, use one ofthe following methods.

WARNING:THE FOLLOWING CHEMICAL METHODS HAVEPROVEN SUCCESSFUL BUT EXTREME CAREMUST BE TAKEN WHEN HANDLING THESEMATERIALS. ALWAYS WORK IN AN AREA WITHADEQUATE VENTILATION. USE THEPRECAUTIONS OUTLINED IN THE MATERIALSAFETY DATA SHEET (MSDS) ANDMANUFACTURER'S INSTRUCTIONS FOR THEPRODUCT YOU ARE WORKING WITH. FOLLOWTHE PERSONAL PROTECTION INDEX FOUNDIN THE HAZARDOUS MATERIALSIDENTIFICATION SYSTEM (HMIS) SECTION OFTHE MSDS.

THE USE AND DISPOSAL OF THESECHEMICALS MAY BE REGULATED BY YOURLOCAL MUNICIPALITY. CONSULT THEREGULATIONS BEFORE DISPOSING OF THESEMATERIALS.

1. Bathroom tub and tile cleaners. Available atsupermarkets.

2. Any of a variety of "scale removers" available atyour local supermarket or hardware store.Generally sold for cleaning coffee makers,humidifiers and vaporizers.

3. Citric acid based cleaners. Contact your labsupply dealer.

4. A 15 to 35% phosphoric acid solution. Availablefrom chemical supply dealers for scale and rustremoval. Allow solution to soak the surfaceaffected until rust and scale is loosened.Immediately rinse with copious amounts of cleanwater.

8

5. Oxalic Acid 2% to 5% in warm water. Swabsolution on surface allowing it to remain untilrust is loosened. Immediately flush with copiousamounts of clean water.

6. A mixture of 20% nitric acid and 1.5% hydrofluoricacid (or hydrochloric acid). Swab solution onsurface allowing it to remain until rust isloosened. Immediately flush with copiousamounts of clean water.

The above are ranked in order of mild to strongcleaning agents. Items 5 and 6 should only beused if severe rust and scale stains have devel-oped and cannot be removed by any other method.In any case the chemical should be allowed to dothe cleaning with minimal scrubbing. Always fol-low the manufacturer's instructions.

6.2 Chamber DisinfectingMaterials known to be effective in disinfecting:

*Household Bleach*Glutaraldehyde*Alcohol

Consult with your staff chemist for advice on usingthese chemicals.

CAUTION:ALWAYS RINSE WITH COPIOUS AMOUNTSOF CLEAN WATER. AIR DRY AND/OR FILLWITH FRESH WATER AND FOLLOW THEGUIDELINES IN "WATER" ABOVE.

CAUTIONDO NOT USE OTHER CLEANING ORDECONTAMINATION METHODS WITHOUTFIRST CONTACTING TECHNICAL SERVICES.

IMPORTANTTHE USER HAS THE RESPONSIBILITYFOR CARRYING OUT APPROPRIATEDECONTAMINATION IF HAZARDOUSMATERIAL IS SPILLED ON OR INSIDE THEBATH.

DISCLAIMER:The above information is the result of limited inves-tigation and Thermo makes no claims as to thesuitability to your particular application. These areintended to be GUIDELINES ONLY. Consult yourstaff chemist to determine what works best in yourlab.

7. SERVICE

WARNING:UNIT MUST BE DISCONNECTED FROMPOWER SOURCE PRIOR TO SERVICING. ITIS RECOMMENDED THAT ALL SERVICE BEPERFORMED BY QUALIFIED SERVICEPERSONNEL.

7.1 General Information

To service the water bath, turn it on its side or topand remove the bottom plate and insulation. Toprevent scratching of the enameled surface, placeprotective material (such as cardboard, cloth, ornewspaper) under unit.

7.2 Heater Element Replacement

A. Put the power switch in the "OFF" position anddisconnect power to the bath.

B. Turn bath upside down and remove bottom plate& fiberglass insulation

C. Disconnect the two leads from heater element.D. Remove the two hex nuts that fasten the heater

element to the pan and remove element.E. Remove FiberFax insulation from the old element

and insert it into the new element.F. Fasten the new heater element to the pan and

connect the two leads.

CAUTION BE SURE THE WIRE LEADS DO NOT TOUCHTHE HEATER ELEMENT.

G. Replace insulation and install bottom plate.

NOTE:USE NO THERMAL COMPOUNDS OR PASTEON HEATER.

Figure 7.1 Heater element

9

7.3.1 Thermostat Replacement

Use the following thermostat replacement proce-dure when the sensing bulb is located WITHIN thebathpan. Some models only have externallymounted sensing bulbs on the underside of thepan, if this is the case follow procedure 7.3.2.

CAUTION:CARE MUST BE EXERCISED WHENHANDLING THE THERMOSTAT CAPILLARY,SINCE A SHARP BEND WILL CRIMP OFF THEFLOW OF THE HYDRAULIC OPERATINGMEDIUM. TO AVOID TWISTING THECAPILLARY OR DAMAGING O-RING, HOLDTHE FITTING UNDER THE BATH STATIONARY,AND FIRMLY TIGHTEN LOCKNUT INSIDE BATHCHAMBER. DO NOT OVER-TIGHTEN, ASO-RING COULD BE SQUEEZED OUT OFPOSITION, CAUSING BATH TO LEAK.UNDERTIGHTENING WILL ALSO CAUSE THEBATH TO LEAK.

A. Put switch in "OFF" position and disconnectpower to bath.

B. Remove shelf and drain bath.C. Remove thermostat control knob by loosening

two set screws on knob.D. Place bath on its side and remove bottom plate

and insulation to gain access to thermostatfitting.

E. Remove two screws fastening thermostat tocontrol panel.

F. Remove wires from thermostat terminals. Marklocation of wire leads.

G. Hold the fitting under the bath stationary, unscrewlocknut inside bath chamber, and remove fromcapillary.

H. Feed thermostat capillary out through hole inbottom of chamber.

I. Replace O-ring on bottom side of chamber withnew Viton O-ring.

J. Complete installation by reversing aboveprocedure. Be certain all wiring is away fromheater. Insulation must be replaced betweenheater and bottom plate to prevent possible wireshorting.

7.3.2 Thermostat Replacement

Use the following procedure when the sensing bulbis located UNDER the pan.

A. Put the power in the "OFF" position anddisconnect power to the bath.

B. Turn bath upside down and remove bottom plateand fiberglass insulation.

C. Mark the location of the wire leads on thethermostat and disconnect.

D. Remove thermostat control knob by looseningtwo set screws on knob.

E. Remove two screws fastening thermostat tocontrol panel.

F. Loosen the two hex nuts holding thermostat bulbbracket and pull the thermostat and bulb outfrom behind the control panel.

G. Mount the new thermostat by reversing steps Athrough G.

CAUTION:MAKE SURE THE WIRE LEADS DO NOTTOUCH THE HEATER ELEMENT.

10

8. REPLACEMENT PARTS

Item # Symbol Wiring Diagram Description Part No.

1 DS1/DS2 Pilot Light Assembly-Amber (120 VAC)Pilot Light Assembly-Amber (240 VAC)

31775753173907

2 S1 DPST Switch - Amber (115 & 230 VAC) 3175318

3 S2/S3 Thermostat (120/240 VAC) under panThermostat (120/240 VAC) in pan

31671503166977

4 HR1/HR2 Heater - Model 2823 (120 VAC)Heater - Model 2824 (240 VAC)Heater - Model 2827 (120 VAC)Heater - Model 2828 (240 VAC)Heater - Model 2831 (120 VAC)Heater - Model 2832 (240 VAC)Heater - Model 2835 (120 VAC)Heater - Model 2836 (240 VAC)Heater - Model 2839 (120 VAC)Heater - Model 2840 (240 VAC)Heater - Model 2843 (120 VAC)Heater - Model 2844 (240 VAC)Heater - Model 2847 (120 VAC) qty 2Heater - Model 2848 (240 VAC) qty 2

31754933175487317549331754873175494317547631754953175477317549631754783175496317547831754963175478

5 n/a Heater Model 2851 equal pans 120V (qty 2)Heater Model 2852 equal pans 220V (qty 2)

31754953175477

6 n/a Thermometer - Model 2823/2824Thermometer - All Other Models

31759973175998

7 n/a O-Ring, Thermometer 3175049

8 n/a Knob, Thermostat 3174903

9 n/a Bracket, Heater Retaining (2/Heater) 3164465

10 n/a Cord and plug (120 VAC)Cord and plug (240 VAC)

31780343176551

11 n/a Mains Fuse Model 2824Mains Fuse Model 2828Mains Fuse Model 2832Mains Fuse Model 2836Mains Fuse Model 2840Mains Fuse Model 2844Mains Fuse Model 2848Mains Fuse Model 2852 (Dual)

31724533172453317246131724613172442317244231724493172454

11

WIRING DIAGRAMMODELS 2823 - 2844

9. WIR

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DIA

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12

WIRING DIAGRAMMODEL 2847/2848

13

WIRING DIAGRAMMODEL 2851/2852

14

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IN

L

IEU

O

F A

LL

O

TH

ER

W

AR

RA

NT

IES

, W

HE

TH

ER

W

RIT

TE

N,

OR

AL

O

R

IMP

LIE

D.

NO

WA

RR

AN

TIE

S O

F M

ER

CH

AN

TA

BIL

ITY

OR

FIT

NE

SS

FO

R A

PA

RT

ICU

LA

R P

UR

PO

SE

SH

AL

L A

PP

LY

.

Therm

o s

hall

not

be l

iable

for

any i

ndirect

or

consequential

dam

ages i

nclu

din

g,

without

limitation,

dam

ages r

ela

ting t

o l

ost

pro

fits

or

loss o

f pro

ducts

.

Your

local

Therm

o S

ale

s O

ffic

e i

s r

eady t

o h

elp

with c

om

pre

hensiv

e s

ite p

repara

tion i

nfo

rmation b

efo

re y

our

equip

ment

arr

ives.

Printe

d instr

uction m

anuals

care

fully

deta

il equip

ment

insta

llation,

opera

tion a

nd p

reventive m

ain

tenance.

If e

quip

ment

serv

ice

is r

equired,

ple

ase c

all

your

Technic

al S

erv

ices D

epart

ment

at

1-8

88-2

13-1

790 (

US

A a

nd C

anada)

or

1-7

40-3

73-4

763. W

e're r

eady to a

nsw

er

your

questions o

n e

quip

ment w

arr

anty

, opera

tion, m

ain

tenance, serv

ice a

nd s

pecia

l

applic

ation.

Outs

ide t

he U

SA

, conta

ct

your

local dis

trib

uto

r fo

r w

arr

anty

info

rmation

.

Re

v. 3

2

/07

ISO

9001

REGI

STER

ED

15

TH

ER

MO

FIS

HE

R S

CIE

NT

IFIC

IN

TE

RN

AT

ION

AL

DE

AL

ER

WA

RR

AN

TY

The W

arr

anty

Period s

tart

s t

wo m

onth

s f

rom

the d

ate

your

equip

ment

is s

hip

ped f

rom

our

facili

ty.

This

allo

ws f

or

ship

pin

g

tim

e s

o t

he w

arr

anty

will

go into

effect

at

appro

xim

ate

ly t

he s

am

e t

ime y

our

equip

ment

is d

eliv

ere

d.

The w

arr

anty

pro

tec-

tion e

xte

nds t

o a

ny s

ubsequent

ow

ner

during t

he f

irst

year

warr

anty

period.

Deale

rs w

ho s

tock o

ur

equip

ment

are

allo

wed

an a

dditio

nal six

month

s for

deliv

ery

and insta

llation, pro

vid

ed the w

arr

anty

card

is c

om

ple

ted a

nd r

etu

rned to the T

echnic

al

Serv

ices D

epart

ment.

During the first year, c

om

ponent part

s p

roven to b

e n

on-c

onfo

rmin

g in

mate

rials

or

work

manship

will

be r

epaired o

r re

pla

ced

at T

herm

o's

expense, la

bor

exclu

ded. In

sta

llation a

nd c

alib

ration a

re n

ot covere

d b

y this

warr

anty

agre

em

ent. T

he T

echnic

al

Serv

ices D

epart

ment

must

be c

onta

cte

d f

or

warr

anty

dete

rmin

ation a

nd d

irectio

n p

rior

to p

erf

orm

ance o

f any r

epairs.

Expendab

le ite

ms,

gla

ss,

filters

, re

agents

, tu

bin

g,

and g

askets

are

exclu

ded f

rom

this

warr

anty

.

Repla

cem

ent

or

repair o

f com

ponents

part

s o

r equip

ment

under

this

warr

anty

sh

all

not

exte

nd t

he w

arr

anty

to e

ither

the

equip

men

t or

to the c

om

ponent pa

rt b

eyond the o

rigin

al w

arr

anty

period. T

he T

echnic

al S

erv

ices D

epart

ment m

ust giv

e p

rior

appro

val

for

retu

rn o

f any c

om

po

nents

or

equip

ment. A

t T

herm

o's

option,

all

no

n-c

onfo

rmin

g p

art

s m

ust

be r

etu

rned t

o

Therm

o p

osta

ge p

aid

and r

epla

ce

ment

part

s a

re s

hip

ped F

OB

destination.

TH

IS W

AR

RA

NT

Y I

S E

XC

LU

SIV

E A

ND

IN

LIE

U O

F A

LL

OT

HE

R W

AR

RA

NT

IES

, W

HE

TH

ER

WR

ITT

EN

, O

RA

L O

R

IMP

LIE

D.

NO

WA

RR

AN

TIE

S O

F M

ER

CH

AN

TA

BIL

ITY

OR

FIT

NE

SS

FO

R A

PA

RT

ICU

LA

R P

UR

PO

SE

SH

AL

L A

PP

LY

.

Therm

o s

hall

not

be lia

ble

for

any indirect

or

consequential dam

ages inclu

din

g,

without

limitation,

dam

ages r

ela

ting t

o lost

pro

fits

or

loss o

f pro

ducts

.

Your

local

Therm

o S

ale

s O

ffic

e i

s r

eady t

o h

elp

with c

om

pre

hensiv

e s

ite p

repara

tion i

nfo

rmation b

efo

re y

our

equip

ment

arr

ives.

Printe

d instr

uction m

anuals

care

fully

deta

il equip

ment

insta

llation,

opera

tion a

nd p

reventive m

ain

tenance.

If e

quip

me

nt

serv

ice

is r

equired,

ple

ase c

all

your

Technic

al S

erv

ices D

epart

ment

at

1-8

88-2

13-1

790 (

US

A o

r C

anada),

or

1-7

40-3

73

-4763.

We're r

eady t

o a

nsw

er

your

questions o

n e

quip

ment

warr

anty

, opera

tion,

main

tenance,

serv

ice a

nd s

pe-

cia

l applic

ation.

Outs

ide t

he U

SA

, conta

ct

your

local dis

trib

uto

r fo

r w

arr

anty

info

rmation.

Re

v. 3

2

/07

ISO

9001

REGI

STER

ED