Installation/Service Manual
Economy Oven
Models 14EG (6520/6521), 25EG (6522/6523), 45EG (6524/6525),
25EM (6526/6527), 45EM (6528/6529)
Thermo Electron Corporation
Millcreek Road, Box 649
Marietta, Ohio 45750
USA
Phone: 740-373-4763
Toll Free: 800-848-3080
FAX: 740-373-4189
Manual P/N 3177886
Rev E Dated 11AUG05
NOTICE
THE MATERIAL IN THIS MANUAL IS FOR INFORMATION PURPOSES ONLY. THE
CONTENTS AND THE PRODUCT IT DESCRIBES ARE SUBJECT TO CHANGE WITHOUT
NOTICE. THERMO ELECTRON CORPORATION MAKES NO REPRESENTATIONS OR
WARRANTIES WITH RESPECT TO THIS MANUAL. IN NO EVENT SHALL THERMO BE
LIABLE FOR ANY DAMAGES, DIRECT OR INCIDENTAL, 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
REVISION STATUS
INDEX DATE AMENDED PAGES NOTES
A
B 11/01 6 Add "plastics can melt" note
C 11/02 2,5,7,8,11 High limit cutout for models 25 & 45
D
E
6/99
9/04
8/05
12, 13
36100121
replaced by hydraulic thermostat
Corrected safety thermostat callout
new manual #, manufacture location
Initial release
(ECO 020809A)
Contents
1. INTRODUCTION .............................................................................................................. 1
2. UNPACKING AND DAMAGE .......................................................................................... 1
3. GENERAL INFORMATION.............................................................................................. 2
4. SPECIFICATIONS ........................................................................................................... 3
5. INSTALLATION ............................................................................................................... 4
6. EXPLANATION OF CONTROLS ..................................................................................... 4
7. OPERATION ....................................................................................................................5
8. MAINTENANCE & SERVICING ...................................................................................... 7
9. PARTS REPLACEMENT ................................................................................................ 8
10. ELECTRICAL DRAWINGS ......................................................................................... 11
11. REPLACEMENT PARTS LIST .................................................................................... 13
12. WARRANTY................................................................................................................. 14
Warnings and Notices
Important: READ THESE NOTICES BEFORE INSTALLING THE UNIT
General Notices
AS A ROUTINE LABORATORY PRECAUTION, ALWAYS WEAR SAFETY GLASSES WHEN
WORKING WITH THIS APPARATUS.
INSTALLATION SHOULD BE COMPLETED BY QUALIFIED PERSONNEL ONLY.
WITHIN THE MECHANICAL CONVECTION CABINETS, OBJECTS SHOULD NOT BE
PLACED ON THE SHELVES IN SUCH A MANNER TO BLOCK THE MOVEMENT OF
HEATED AIR INTO THE CHAMBER.
Electrical Warnings
FOR PERSONAL SAFETY, THIS APPARATUS MUST BE PROPERLY GROUNDED.
BE SURE THAT THE POWER SUPPLY IS OF THE SAME VOLTAGE AS SPECIFIED ON
THE NAMEPLATE.
DANGEROUS VOLTAGES EXIST WITHIN THIS UNIT. SERVICE SHOULD BE PERFORMED
ONLY BY QUALIFIED PERSONNEL. DISCONNECT THE UNIT FROM ITS ELECTRICAL
SOURCE. REMOVE THE SHELVES AND THERMOMETER IF INSTALLED.
DISCONNECTING ANY COMPONENT FROM THE CIRCUIT WITHOUT PRIOR REMOVAL
OF THE POWER SOURCE MAY CAUSE DAMAGE TO OTHER CIRCUIT COMPONENTS.
DO NOT CRIMP OR SHARPLY BEND CAPILLARIES. PROVIDE ADEQUATE CLEARANCE
BETWEEN CAPILLARY AND HEATER COILS TO PREVENT ELECTRICAL SHORT.
DISCONNECT OVEN FROM ITS POWER SOURCE BEFORE SERVICING.
1. INTRODUCTION
2. UNPACKING AND DAMAGE
1.01 Your satisfaction and safety are
important to Thermo and a complete
understanding of this unit is necessary to attain
these objectives.
1.02 As the user of this apparatus, you have
the responsibility to understand the proper
function and operational characteristics of it.
This instruction 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.
1.03 This product is not intended, nor can it
be used, as a sterile or patient connected
device. In addition, this apparatus is not
designed for use in Class I, II or III locations as
defined by the National Electrical Code.
2.01 Save all packing material if apparatus is
received damaged. This merchandise was
carefully packed and thoroughly inspected
before leaving our factory.
2.02 Responsibility for 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:
1. 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 damaged claim. The form
required to file such claim will be supplied
by the carrier.
2. 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 carrier's
agent within fifteen (15) days of the delivery
date; then file a claim with the carrier since
the damage is the carrier's responsibility.
2.03 If you follow the above instructions
carefully, we will guarantee our full support of
your claim to be compensated for loss or
concealed damage.
DO NOT -- FOR ANY REASON -- RETURN
THIS UNIT WITHOUT FIRST OBTAINING
AUTHORIZATION. In any correspondence to
Thermo, please supply the nameplate data,
including catalog number and serial number.
1
3. GENERAL INFORMATION
3.01 This instruction manual encompasses
the following models and their specific electrical
characteristics.
3.03 Models 25EM and 45EM use mechanical
convection as a method of heat transfer.
Mechanical convection can be defined as a
positive and planned directional air flow or forced
air circulation within the chamber.
3.02 Models 14EG, 25EG and 45EG employ
gravity convection as a method of heat transfer.
Gravity convection is defined as the natural
tendency for heated air to rise due to it's change
in density and mass.
3.02.1 Air is drawn into the chamber through
openings in the bottom of the oven and then
heated as it passes over the electric heating
coils and up through the openings in the diffuser
panel located on the bottom of the inner chamber.
A limited amount of heated air is exhausted out
of the top of the chamber through the vent shutter
cap and the remaining air recirculates within the
chamber.
3.02.2 Gravity convection ovens are ideal where
forced air circulation cannot be tolerated and for
situations demanding gentle curing or long term
sample storage under closely controlled
conditions. Gravity convection ovens are ideal
for drying powders, soil samples, paper goods,
semiconductors and cosmetics.
3.03.1 Air is drawn into the chamber through
vent tubes located in the bottom of the oven and
is heated as it passes over the electric heating
coils. The air is blown through openings in the
bottom of the inner chamber. A limited amount
of heated air is exhausted out the top of the
chamber through the vent shutter cap and the
remaining air recirculates within the chamber.
3.03.2 Mechanical convection ovens provide
the most efficient means of heat transfer as well
as the most reproducible test conditions for
repeat operations. Mechanical convection
allows for rapid heat up time for high density
loads, shortened recovery periods after door
openings and improved uniformity for extremely
heat sensitive samples.
3.04 All models use a hydraulic thermostat for
temperature safety limit control.
2
Economy Ovens
4. Specifications
Model Number 14EG 25EG 25EM 45EG 45EM
Convection
Technique
Temperature Control
Temperature Display
Temperature
Range
Sensitivity
Dimensions (LxWxH)
Chamber
Shelf
(each)
Exterior*
Net Weight
Chamber Volume
Gravity Gravity Mechanical Gravity Mechanical
Hydraulic Electronic Electroni c Electro nic Electronic
0° to 250°C
Thermometer
65° to 210°C
±0.5°C
14 x 12.5 x 13.75 in.
356 x 318 x 349 mm
13.5 x 12.5 in.
343 x 318 mm
19.5 x 18 x 28 in.
495 x 457 x 711 mm
69 lbs., 31 kg 93 lbs., 42.4 kg 103 lbs., 46.7 kg 120 lbs., 54.4 kg 130 lbs.,59 kg
1.4 cu.ft.
39 liters
0° to 250°C
Thermometer
65° to 210°C
±0.3°C
15.5 x 18.5 x 15 in.
390 x 470 x 380 mm
15.5 x 18 in.
390 x 455 mm
21.5 x 24 x 28 in.
550 x 610 x 715 mm
2.5 cu.ft.
71.5 liters
0° to 250°C
Ther mometer
50° to 210°C
±0.3°C
15.5 x 18.5 x 15 in
390 x 470 x 380 mm
15.5 x 18 in.
390 x 455 mm
21.5 x 24 x 28 in.
550 x 610 x 715 mm
2.5 cu.ft.
71.5 liters
0° to 250°C
Thermometer
65° to 210°C
±0.3°C
15.5 x 18.5 x 27 in.
390 x 470 x 685 mm
15.5 x 18 in.
390 x 455 mm
21.5 x 24 x 40 in.
550 x 610 x 1020 mm
4.5 cu.ft.
129 liters
0° to 250°C
Thermometer
50° to 210°C
±0.3°C
15.5 x 18.5 x 27 in.
390 x 470 x 685 mm
15.5 x 18 in.
390 x 455 mm
21.5 x 24 x 40 in.
550 x 610 x 1020 mm
4.5 cu.ft.
129 liters
Shelves**
Supplied
Maximum
Electrical Data***
(all models 50/60 Hz )
115V
230V
Shipping Data
Dimensions
(LxWxH)
Weight
Volume
Catalog Number
115 V
230 V
* Exterior height includes vent cap and adjustable feet
** Spacing between shelves is 2 inches (50mm)
*** All ovens equipped with line cord and plug
609 x 584 x 762 mm
2
6
0.8 kW, 7.1 A
0.8 kW, 3.5 A
24 x 23 x 30 in.
79 lbs., 35.5kg
9.8 cu.ft.
0.28 cu. meters
3166767
3166768
25 x 26 x 31.5 in.
635 x 660 x 800 mm
117 lbs., 53.1 kg
0.33 cu. meters
2
6
1.3 kW, 11.3 A
1.3 kW, 5.6 A
11.7 cu.ft.
3166769
3166770
2
6
1.3 kW, 11.3 A
1.3 kW, 5.6 A
25 x 26 x 31.5 in.
635 x 660 x 800 mm
127 lbs., 59.6 kg
11.7 cu.ft.
0.33 cu. meters
3166773
3166774
3
2
10
1.8 kW,15.6 A
1.8 kW, 7.8 A
25 x 26 x 43.5 in.
635 x 660 x 1105 mm
145 lbs., 65.8 kg
16.3 cu.ft.
0.46 cu. meters
3166771
3166772
2
10
1.8 kW,15.6 A
1.8 kW, 7.8 A
25 x 26 x 43.5 in.
635 x 660 x 1105 mm
155 lbs., 70.3 kg
16.3 cu.ft.
0.46 cu. mete rs
3166775
3166776
5. INSTALLATION
WARNING
INSTALLATION SHOULD BE COMPLETED
BY QUALIFIED PERSONNEL ONLY.
5.01 Location - The most uniform operating
conditions will be obtained by placing the oven in
an area remote from drafts, ventilating outlets,
radiators, and other rapidly changing ambient
conditions. To assure proper ventilation allow a
minimum of three (3) inches of clearance between
the rear, top and sides of the oven and adjacent
walls. If two or more ovens are to be placed side by
side, then allow six (6) inches between them. The
four legs on the bottom of the oven can be turned
to raise or lower the corners so that it sits level on
the table.
5.02 Electrical Connections -
5.03 Determine the total amount of current
being used by other apparatus connected to the
circuit that will be used for this apparatus. It is
critical that the added current demand (see
nameplate) of this and other equipment used on
the same circuit does not exceed the rating of
the fuse or circuit breaker.
CAUTION
BE SURE THAT THE POWER SUPPLY IS
OF THE SAME VOLTAGE AS SPECIFIED
ON THE NAMEPLATE.
6. EXPLANATION OF CONTROLS
6.01 On/Off Switch - The on/off switch controls
the flow of all electric power to the oven. The
blower motor in the mechanically convected
models will always be in operation with the
power switch ON.
1. The 14EG, 25EG and 25EM are provided
with a 120V, 15 amp, three-prong (grounding)
plug. The 45EG and 45 EM come equipped with
a 120V, 20 amp, three-prong (grounding) plug.
Both plug configurations are industry standard,
and mate with standard three-prong grounding
wall receptacles to minimize the possibility of
electric shock hazard from this apparatus. If in
doubt the user should have the wall receptacle
and circuit checked by a qualified electrician to
make sure the receptacle can provide adequate
current and is properly grounded.
WARNING
FOR PERSONAL SAFETY THIS APPARATUS
MUST BE PROPERLY GROUNDED.
2. Where a standard two-prong wall
receptacle is encountered, it is the personal
responsibility and obligation of the user to have
it replaced with a properly grounded three-prong
wall receptacle. DO NOT, UNDER ANY
CIRCUMSTANCES, CUT OR REMOVE THE
THIRD (GROUND) PRONG FROM THE
POWER CORD. DO NOT USE A TWOPRONG ADAPTER PLUG.
6.02 Three-Heat Switch - Model 14EG has
a three heat switch. This switch also functions as
the main "on/off" switch. With this switch it is
possible to supply maximum wattage to the unit
for initial heat-up and then reduce the wattage
when operating temperature is reached. Low
setting may be used for temperatures up to
approximately 115°C, medium setting from
115°C to 175°C and high setting above 175°C.
Most uniform control is achieved when setting is
just high enough to maintain desired
temperature.
6.03 Temperature Control Knob - The
Temperature Control knob is used to set the
operating temperature. Numerical graduations
do not refer to any specific temperature but are
simply for reference. As you become familiar
with operating your oven, record dial settings
which correspond to your preferred operating
temperatures.
6.04 Temperature Control Pilot Lamp -
When the lamp above the Temperature Control
is illuminated, this indicates electric current is
being applied to the heater. It is normal for this
lamp to cycle on and off during the operation of
the oven.
4
6.05 Safety Control Knob - Model 14EG
has a safety control knob to set the desired
safety control temperature.
6.06 Safety Cutout Pilot Lamp - When the
Safety Cutout Pilot Lamp is illuminated, this
indicates that either the Temperature Control
Thermostat or sensor has failed and that the
oven is controlling from the Safety Controller.
6.07 Glass Thermometer - Used to indicate
oven temperature and determine proper thermostat settings.
Safety Cutout
Pilot Lamp
Safety Adjustment
Access
Figure 6.1 - Controls
7. OPERATION
7.01 Fully open the exhaust vent shutter cap
on the top of the oven and keep it open at all
times. However, if running the oven at the
maximum rated temperature it may be necessary
to turn the cap to a more closed position to retain
heat.
Temp. Control
Pilot Lamp
Power
Switch
Temp. Control
Knob
A thermometer is provided and should be
inserted through the hole in the vent shutter cap
such that the three metal fingers punched in the
cap converge toward the center of the cap and
the glass ring on the thermometer rests on the
top of the cap. The metal fingers may have to be
bent slightly to grip the thermometer.
Insert shelf supports into the holes punched in
the side walls of the inner chamber. Insert the
shelves into the shelf supports and try to keep an
equal distance between shelves whenever
possible. Never cover the shelves with foil or
reduce their open surface area by more than
75%, this will greatly reduce convection and
hence uniformity and control will suffer.
1. Press the ON/OFF switch for power to the
ON position. For the 14EG only, select the
desired temperature range.
2. Rotate the safety control adjustment fully
clockwise.
3. Rotate the Temperature Control knob to
some median position.
5
4. Allow the chamber sufficient time to heat up
and observe the temperature on the
thermometer in the vent cap. The lamp
above the Temperature Control knob should
turn on and off at regular intervals which
indicates the control has stabilized at a
particular set point.
NOTE: WITHIN THE MECHANICAL
CONVECTION CABINETS, OBJECTS
SHOULD NOT BE PLACED ON THE
SHELVES IN SUCH A MANNER TO BLOCK
THE MOVEMENT OF HEATED AIR INTO
THE CHAMBER.
5. If the thermometer indicates that the chamber
temperature is below the desired set point
and the lamp above the Temperature Control
has been turning on and off, rotate the
Temperature Control slightly in a clockwise
direction. Turn the Temperature Control
slightly counterclockwise if the thermometer
indicates the chamber temperature is above
the desired set point.
6. Set the safety adjustment: When the
thermometer indicates the chamber is at the
desired temperature and the lamp above
the temperature control is cycling on and off
at fairly uniform intervals begin to turn the
safety adjustment slowly counterclockwise.
At the moment the safety lamp is illuminated,
the lamp above the temperature control will
turn off. Rotate clockwise until the lamp
above the safety adjustment is off and the
lamp above the temperature control is back
on. The safety limit has now been set.
7.02 When you are finished using the oven,
simply press the ON/OFF power switch to the
OFF position. You may leave the temperature
controls in their set positions if you wish to
resume operation at that temperature some
time later.
7.03 Loading
2. The bottom floor of the chamber must be
kept free and clear of objects and never
used as a shelf.
3. At no time should solid shelves be substituted
for the shelves that are provided. Additional
shelves and shelf supports are available
from Precision.
7.04 Safety
1. DO NOT place any explosive, combustible
or flammable materials in this chamber.
2. DO NOT place sealed containers in the
chamber. Sealed containers, filled with
materials, do not provide room from
expansion or evaporation and can develop
dangerous vapor pressure as the
temperature increases.
3. Avoid placing plastic materials in the oven.
Extreme temperatures may cause plastics
to melt, posing a fire hazard. If plastics are
placed in the oven, do not leave the oven
unattended.
4. Avoid spillage of liquids or powders within
the chamber. Clean all spills as soon as
possible. Use caution if oven is still hot.
5. DO NOT evaporate noxious or poisonous
fumes.
Although the gravity and mechanical convection
ovens rely on different methods of air circulation,
general loading procedures are applicable to
both types and must be followed. It is important
for uniformity and recovery that air circulation
within the chamber is not restricted.
1. At least one (1) inch (2.5 cm) should be left
between objects placed on the shelves.
6. These ovens are not intended for food
service or the preparation of meals.
7. DO NOT store containers filled with acidic or
caustic solutions within the chambers, as
vapors from these materials will attack the
chamber interior and electrical components,
thus voiding the warranty.
6
8. MAINTENANCE AND SERVICING
8.01 Troubleshooting
WARNING
DANGEROUS VOLTAGES EXIST WITHIN
THIS UNIT. SERVICE SHOULD BE
PERFORMED ONLY BY QUALIFIED
PERSONNEL. DISCONNECT THE UNIT
FROM ITS ELECTRICAL SOURCE. REMOVE
THE SHELVES AND THERMOMETER IF
INSTALLED. DISCONNECTING ANY
COMPONENT FROM THE CIRCUIT
WITHOUT PRIOR REMOVAL OF THE POWER
SOURCE MAY CAUSE DAMAGE TO OTHER
CIRCUIT COMPONENTS.
8.02 Temperature Variance or Fluctuation
1. Make sure vent shutter cap is not closed.
Open to the maximum position.
2. Test unit when empty; if results are
satisfactory the chamber was improperly
loaded. Redistribute the load.
8.03 Heat Loss
Inspect door gasket to make certain it fits firmly
against cabinet at all points. Replace gasket if
torn or damaged.
Improper Door Closure - Inspect door latches
which are spring loaded to see if they pull the
door in tightly against the body of the oven. If the
"finger" of the latch (in the door) has been
sprung into the body of the latch, use a pen or
similar object to pop it back out. Check the oven
cabinet to see that it is level. Use a spirit level
and turn the four adjustable feet on the bottom of
the oven to make it level.
No Heat - If the chamber does not heat, first
check the line voltage, circuit breakers and/or
fuses of the line circuit. Check if all electrical
connections are secure.
3. Be sure to allow ample time for an empty
chamber to stabilize at the desired
temperature setting. It could take over one
hour to equilibrate depending upon the
differences between ambient and operating
temperatures. The mass of the load can
also affect stabilization time.
4. Make certain severe line voltage fluctuations
are not occurring.
5. Make certain all wire connections are secure
at their terminals.
6. Make certain that an intermittent failure of
the switch, thermostat or wiring has not
occurred. Isolate the cause; repair or replace.
7
8.04 Heater Resistance Check
9. PARTS REPLACEMENT
WARNING
DISCONNECT OVEN FROM ITS POWER
SOURCE BEFORE PROCEEDING. REFER
TO THE APPROPRIATE WIRING DIAGRAM
AT THE END OF THE MANUAL AND
LOCATE THE ELECTRICAL LEADS FOR
THE HEATER. USE THE VALUES IN THE
HEATER COLD RESISTANCE TABLE TO
FIND THE APPROPRIATE VALUE. BE SURE
TO DISCONNECT AT LEAST ONE HEATER
LEAD FROM THE TERMINAL STRIP
BEFORE TAKING THE RATING WITH YOUR
OHM METER. AGAIN, IT IS IMPERATIVE
THAT THE UNIT BE COMPLETELY
DISCONNECTED FROM ITS ELECTRICAL
POWER SOURCE BEFORE ANY
READINGS ARE TAKEN.
If the heater is open (infinite resistance) it should
be replaced. If the heater reads less than five
ohms it is shorted and should be replaced.
Check the resistance between each lead of the
heater and a base metal point on the oven
chassis. If there is less than infinite resistance
(a million ohms or greater) between the heater
and chassis, the heater is shorted to the ground
and should be replaced. Also, inspect all wires
leading to the heater for signs of shorting or
electrical contact to chassis of oven.
9.01 Heater Replacement
1. Disconnect power.
2. Remove the clamps securing the
thermostat bulbs to the floor. Carefully bend
the bulbs to a vertical position.
3. Remove two screws securing control
panel and carefully lift control panel and
lay it on it's face.
Model 14EG: Then remove three screws
securing the front z-bracket,screws are
located directly above the control panel.
Remove one screw on back wall that
secures the oven floor. Lift bottom floor
straight up and out to remove it.
Model 25 & 45: Remove ten screws that
secure floor and lift out.
4. Disconnect heater terminals and heater
mounting screws. Carefully lift straight
up and out.
5. Replace with new heater, reinstall in
reverse order.
9.02
Probe Replacement, Models 25 & 45
1. Disconnect power.
2. Remove back panel screws.
3. Pull probe straight out.
4. Open control panel by removing top
screws
which secure it and disconnect probe
terminals.
5. Replace with new probe, reinstall in
reverse order.
9.03 Motor Replacement (Mechanical
Models only)
1. Disconnect power.
2. Open control panel by removing top
screws which secure it and disconnect
motor and heater terminals.
3. Remove screws which secure lower
floor and lift out.
4. Disconnect/remove heater mounting
screws, remove heater and wires.
5. Detach blower wheel from motor shaft.
8
6. Turn oven on its back or side and remove
bottom plate. Remove motor mounting
bracket from underside of oven.
7. Replace with new motor, reinstall in
reverse order.
9.04 Control Replacement, Models 25 & 45
1. Disconnect power
2. Open control panel by removing top
screws which secure it and disconnect
leads to control pcb.
3. Remove control pcb.
4. Replace with new control pcb, reinstall
in reverse order.
7. Model 14 EG: Remove screws securing
thermostat to control panel. Remove
two screws securing angle cover, located inside of inner chamber on the
front left side. This will give you room to
pull thermostat bulbs out.
Model 25 & 45: Remove thermostat
bracket from control panel. Remove thermostat from bracket. Remove knob from
thermostat.
8. Pull thermostat bulbs through chamber
and out the front.
9. Retrace preceding steps to install the
new thermostat assembly.
9.05 Thermostat Replacement:
1. UNPLUG UNIT FROM ELECTRICAL
SOURCE
2. Loosen thermostat bulbs by removing two
clamps secured to chamber bottom floor.
3. Remove two screws securing control panel
and carefully lift control panel and lay it
on it's face.
4. Model 14 EG: Remove three screws
securing the front z-bracket, screws are
located directly above the control panel.
Remove screw securing the oven floor.
Lift bottom floor straight up and out, be
careful with the thermostat bulbs.
Model 25 & 45: Remove ten screws that
secure floor and lift out. Be careful with
the thermostat bulb.
5. Remove knobs by loosening two set
screws on each knob. (14 EG only)
6. Tag lead wires and detach from
thermostats.
CAUTION
DO NOT CRIMP OR SHARPLY BEND
CAPILLARIES. PROVIDE ADEQUATE
CLEARANCE BETWEEN CAPILLARY AND
HEATER COILS TO PREVENT
ELECTRICAL SHORT.
9.06 Door and Latch Repair
A) Replace Door Assembly
1. Disconnect power
2. Remove door by unscrewing top hinge
plate, be careful to hold door while removing hinge.
3. Lift door off lower hinge.
4. Replace door in reverse order.
B) Replace Door Latches
1. Replace door gasket by removing the
screws which secure inner door liner.
Reassemble in reverse order.
2. Replace door latches by removing inner
door liner, door gasket and door insulation.
3. Unscrew door latch clips and replace
latches.
4. Reassemble in reverse order.
9
C) Replace Door Handle
1. Replace door handle by removing inner
door liner, door gasket and door
insulation.
2. Remove screws which secure door
handle and replace handle.
3. Reassemble in reverse order.
9.07 Door Latch Grabber
(on body of unit)
1. Disconnect power.
2. Remove screws which secure door latch
grabber and remove them from front.
NOTE: Used retaining nuts will fall
into oven body.
3. Insert replacement latch assembly
through open slot and fasten with screws
and washers provided.
10
LINE CORD ASS'Y
WH
GR
BK
E1
GROUND
LEAD ASSY
3 PLACES
3 HEAT
SWITCH
LEAD ASSY.
YL
RD
TN
TN
TN
HEATER
THERMOSTAT
2 PLACES
3
N
L1
1
2
BK
TEMPERATURE
CONTROL
TEMPERATURE
SAFETY
THERMOSTAT
SAFETY
OR
RDBK
CONTROL
THERMOSTAT
LEAD ASSY
WH
LIGHT ASSY.
2 PLACES
INTERNAL SWITCH CONNECTIONS
OFF
N 3
LOW
LI 2
N 3
MED
LI 1
N 2 & 3
HIGH
LI 1
WIRING DIAGRAM - MODEL 14 EG
11
WHITE
GREEN
BLACK
SAFETY
THERMOSTAT
SAFETY
CUTOUT
LAMP
4
5
TB1-1
TB1-1
TB1-1
CHASSIS GROUND
EMR
TB1-3
TB1-4
EMR-1
TB1-2
TB1-2
TB1-2
1
POWER
SWITCH
2
BLOWER
MOTOR
TEMP
CONTROL
TEMP
CONTROL
LAMP
HEATER
230 V
SENSOR SPECS:
318K OHMS @ 0˚C
6.6K OHMS @ 100˚C
HEATER COLD RESISTANCE
BETWEEN TB1-4 AND TB1-2
HEATER
PART NO.
34247439
34247440
WIRING DIAGRAM
MODELS 25EG, 25EM, 45EG, 45EM
WATTS
1100
1600
12
HEATER
115 V
OHMS
47
32.5
SLEDOMLLA-NEVOYMONOCE-TSILSTRAPTNEMECALPER
LEDOM
GE41
PACRETTUHSTNEV6837713
ROOD3294713
ELDNAH
LORTNOCERUTAREPMET,BONK3094713
C°052-0RETEMOMREHT6995713
EGNIHPOT132613
EGNIHMOTTOB232613
NIHROOD2267713
TIKFLEHS21266134126613
FLEHSERIW27377135857713
GNIHSUBEG
V511,YSSARETAEH054571311557132155713
V022,YSSARETAEH374571311557132155713
KTNEMECALPERHCTAL7307613
TI
TROPPUSFLEHS932613522613
TEKSAGROOD1864713
LEDOM
)LLA(52
LEDOM
)LLA(54
TATSOMREHTYTEFAS4325
DETHGIL-NON,TSPD,HCTIWSA/N8135713
TAEH3,HCTIWS9625713A/N
81-61/5,TOOFGNILEVEL6335713
RELLORTNOCERUTAREPMET4
ROSNESERUTAREPMETA/N5376713
SSENRAHNEVOYMONOCEA/N7276713
NOITISOP6KCOLBMRETA/N6145713
ROOD632613
VO,TIK992761325276133527613
V022TESDROC88456139556713
ELGNATROPPUS
ELGNAREKIRTSROOD732613
V511,YLBMESSATHGIL53426133342613
V032,YLBMESSATHGIL63426134342613
GNIGAKCAPNE
V511TESDROC184561325567132656713
YLNOSLEDOMLACINAHCEM
3257130376713
713
REWOLBA/N7985713
LEEHW
V511,YSSAROTOMA/N7896613
V032,YSSAROTOMA/N5107613
13
THERMO ELECTRON CORPORATION STANDARD PRODUCT WARRANTY
The Warranty Period starts two weeks from the date your equipment is shipped from our facility. This allows for shipping time
so the warranty will go into effect at approximately the same time your equipment is delivered. The warranty protection
extends to any subsequent owner during the first year warranty period.
During the first year, component parts proven to be non-conforming in materials or workmanship will be repaired or replaced
at Thermo's expense, labor included. Installation and calibration are not covered by this warranty agreement. The Technical
Services Department must be contacted for warranty determination and direction prior to performance of any repairs.
Expendable items, glass, filters and gaskets are excluded from this warranty.
Replacement or repair of components parts or equipment under this warranty shall not extend the warranty to either the
equipment or to the component part beyond the original warranty period. The Technical Services Department must give prior
approval for return of any components or equipment. At Thermo's option, all non-conforming parts must be returned to
Thermo Electron Corporation postage paid and replacement parts are shipped FOB destination.
THIS WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES, WHETHER WRITTEN, ORAL OR
IMPLIED. NO WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE SHALL APPLY.
Thermo shall not be liable for any indirect or consequential damages including, without limitation, damages relating to lost
profits or loss of products.
Your local Thermo Sales Office is ready to help with comprehensive site preparation information before your equipment
arrives. Printed instruction manuals carefully detail equipment installation, operation and preventive maintenance.
If equipment service is required, please call your Technical Services Office at 1-888-213-1790 (USA and Canada) or 1-740373-4763. We're ready to answer your questions on equipment warranty, operation, maintenance, service and special application. Outside the USA, contact your local distributor for warranty information.
Rev. 2 1/03
ISO
9001
REGISTERED
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