Analyze • Detect • Measure • Control
™
Model 6540 and 6550 Series
Thelco Oven
Operating and Maintenance Manual
3177885 Rev. I Dated 05MAY06
Thermo Electron CorporationThermo Electron Corporation
MANUAL NUMBER 3177885
I 23443 5/06 Consolidated 230V manual (P/N 3179180) with 120V, no CE ccs
H -- 2/06 Knob part number from 3174902 to 3174903, page 14
G -- 1/06 Part number from 3176708 to 3176738, page 13
F -- 11/05 Part number from 3174892 to 3174903, page 14
E -- 7/05 new manual number (36100120 [34001783]), manufacture location
D -- 8/03 Add temperature control range specification, page 3-4
C -- 11/01 Add “plastics can melt”, page 8
B -- 8/99 Updated for new kit #s, pages 12-14
A -- 6/99 Initial release
REV ECR/ECN DATE DESCRIPTION By
Preface
3177885 Thelco Oven i
Current Model # Previous Model # Voltage
6540 70 120V
6541 70 230V
6545 70D 120V
6546 70D 230V
6550 70M 120V
6551 70M 230V
6555 70DM 120V
6556 70DM 230V
6542 130 120V
6543 130 230V
6547 130D 120V
6548 130D 230V
6552 130M 120V
6553 130M 230V
6557 130DM 120V
6558 130DM 230V
6544 160 230V
6549 160D 230V
6554 160M 230V
6559 160DM 230V
Table 1. Models Covered In This Manual
Thermo Electron Corporationii 3177885 Thelco Oven Thermo Electron Corporation
Preface
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.
V
Caution All internal adjustments and maintenance must be performed by qualified service personnel. V
Note The 230V models 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 cord (P/N 3179481) must be ordered separately.
Models 6544, 6549, 6554, 6559 are only available in 230V and are supplied from the factory with both cord
styles.
V
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 held liable for any damages, direct or incidental, arising out of or related to
the use of this manual.
©2003 Thermo Electron Corporation. All rights reserved.
Thermo Electron Corporation 3177885 Thelco Oven iiiThermo Electron Corporation
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 Electron
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 Electron’s compliance with this directive, the recyclers in your country and information on
Thermo Electron products will be available at www.thermo.com.
Always use the proper protective equipment (clothing, gloves, goggles, etc.)
Always dissipate extreme cold or heat and wear protective clothing.
Always follow good hygiene practices.
Each individual is responsible for his or her own safety.
Thermo Electron Corporationiv 3177885 Thelco Oven Thermo Electron Corporation
Preface
3177885 Thelco Oven vThermo Electron Corporation
Table of Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Unpacking and Damage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Explanation of Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
Loading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-3
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-4
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-5
Periodic Safety Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-6
Section 1
Section 2
Section 3
Section 4
Section 5
Section 6
Section 7
vi 3177885 Thelco Oven Thermo Electron Corporation
Maintenance and Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-1
Temperature Variance or Fluctuation . . . . . . . . . . . . . . . . . . . . . . . . .8-1
Temperature Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-2
Calibration (Digital Models Only) . . . . . . . . . . . . . . . . . . . . . . . . . . .8-2
Heat Loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-3
Heater Resistance Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-3
Parts Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-1
Heater Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-1
Heater Wire Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-1
Probe Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-2
Motor Replacement (Mechanical Models) . . . . . . . . . . . . . . . . . . . . .9-2
Control Replacement (Analog Models) . . . . . . . . . . . . . . . . . . . . . . .9-2
Control Replacement (Digital Models) . . . . . . . . . . . . . . . . . . . . . . .9-3
Door and Latch Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-3
Door Latch Grabber (on body of oven) . . . . . . . . . . . . . . . . . . . . . . .9-4
Electrical Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-1
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-1
Table of Contents
Section 8
Section 9
Section 10
Section 11
3177885 Thelco Oven 1-1Thermo Electron Corporation
Section 1 Introduction
Your satisfaction and safety are important to Thermo and a complete
understanding of this unit is necessary to attain these objectives.
As the ultimate user of this apparatus, you have the responsibility to
understand the proper function and operational characteristics of your
oven. 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.
V
Warning 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.
V
Warning When unpacking this unit, use a mechanical lifting device or
enough people to easily lift the unit and place it in it’s proper location.
V
Caution The benchtop, or other mounting surface, must be rigidly
constructed and capable of comfortably supporting the unit weight.
Do not mount this equipment on a flammable surface.
V
3177885 Thelco Oven 2-1Thermo Electron Corporation
Section 2 Unpacking and Damage
Save all packing material if apparatus is received damaged. This product
was carefully packed and thoroughly inspected before leaving our factory.
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 damage
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 15 days of the delivery
date; then file a claim with the carrier since the damage is the carrier's
responsibility.
If you follow the above instructions carefully, we will 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, please supply the
nameplate data, including catalog number and serial number.
3177885 Thelco Oven 3-1Thermo Electron Corporation
Section 3 General Information
This instruction manual encompasses the following models and their
specific electrical characteristics.
• Models 6540/6541, 6545/6546, 6542/6543, 6547/6548, 6544, and
6549 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.
Air is drawn into the chamber through openings in the bottom of the
oven then heated as it passes over the electric heating coils and up
through the diffuser panel located on the bottom of the inner chamber.
A limited amount of the heated air is exhausted out of the chamber
through the openings in the vent cap located on the top of the oven
and the remaining air recirculates within the chamber.
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.
• Models 6540/6541, 6542/6543, and 6544 use an analog solid state
temperature control with analog solid state safety thermostat.
• Models 6545/6546, 6547/6548 and 6549 use a microprocessor control
with digital set point, digital display and digital safety thermostat.
• Models 6550/6551, 6552/6553, 6554, 6555/6556, 6557/6558 and
6559 ovens 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. Air is
drawn into the chamber through a vent tube located in the bottom of
the oven and is heated as it passes over the electric heating coils. The
air is blown through the duct network and forced into the chambers
through calculated, carefully designed openings in the side diffuser
walls.
A limited amount of the heated air is exhausted out the top of the
chamber through the vent shutter cap and the remaining air
recirculates within the chamber.
3-2 3177885 Thelco Oven Thermo Electron Corporation
Section 3
General Information
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 materials.
• Models 6550/6551, 6552/6553 and 6554 provide mechanical
convection of heat controlled by an analog solid state control with
analog solid state safety thermostat.
• Models 6555/6556, 6557/6558 and 6559 provide mechanical
convection of heat controlled by a microprocessor with digital set
point, digital display and digital safety thermostat.
• 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:
• 15ºC to 45ºC
3177885 Thelco Oven 4-1Thermo Electron Corporation
Section 4
Specifications
Specifications Gravity Convection
Model
6540/6541
Model
6542/6543
Model 6544
Model
6545/6546
Model
6547/6548
Model 6549
Temperature Control Electronic Microprocessor
Temperature Display 0°C to 250° Thermometer 3 Digit LED
Temperature Control Range 65°C to 250°
Temperature @ 100° C ±4.0 ±3.5
Uniformity @ 200° C ±4.5 ±4.5
Sensitivity ±0.3° C ±0.1°C
Minutes to reach Max.
Temperature 250°
60
*Recovery Time @ 100° C 8 10 12
(minutes) @ 200° C 5 10 12
Max. Air Changes/Hr 30 23 15 30 23 15
Chamber Volume cu. ft. 2.5 4.5 5.5 2.5 4.5 5.5
liters 71.5 129 157.5 71.5 129 157.5
Net Weight lbs. 100 130 145 100 130 145
kg 45.3 59 65.8 45.3 59 65.8
Dimensions (D x W x H)
Chamber inches 15-3/4x18-1/2x15 15-3/4x18-1/2x27 15-3/4x18-1/2x33 15-3/4x18-1/2x15 15-3/4x18-1/2x27 15-3/4x18-1/2x33
mm 400x470x381 400x470x686 400x470x838 400x470x381 400x470x686 400x470x838
**Overall inches 21-1/4x24x28 21-1/4x24x40 21-1/4x24x46 21-1/4x24x28 21-1/4x24x40 21-1/4x24x46
mm 540x610x711 540x610x1016 540x610x1168 540x610x711 540x610x1016 540x610x1168
Electrical 50/60 Hz 115V 1200W 10.4A 1700W 14.8A N/A N/A 1200W 10.4A 1700W 14.8A N/A N/A
230V 1200W 5.2A 1700W 7.4A 2000W 8.7A 1200W 5.2A 1700W 7.4A 2000W 8.7A
Shipping Dimensions in. 25x26x31-1/4 25x26x43-1/4 25x26x49-1/4 25x26x31-1/4 25x26x43-1/4 25x26x49-1/4
Shipping Weight lbs. 125 155 170 125 155 170
Max Number of Shelves 6 12 15 6 12 15
***Shelves Supplied 2
Shelf Dimensions in. 15.5 x 18
mm 390 x 455
Catalog Number 115V 3166782 3166784 - - 3166787 3166789 - -
230V 3166783 3166785 3166786 3166788 3166790 3166791
“* Door Open for 30 seconds
** Overall height includes vent cap and adjustable feet
*** Spacing between shelves is 1-7/8” (48mm)
4-2 3177885 Thelco Oven Thermo Electron Corporation
Section 4
Specifications
Specifications Mechanical Convection
Model
6550/6551
Model
6552/6553
Model 6554
Model
6555/6556
Model
6557/6558
Model 6559
Temperature Control Electronic Microprocessor
Temperature Display 0°C to 250° Thermometer 3 Digit LED
Temperature Control Range 40°C to 250°
Temperature @ 100° C ±3.0 ±2.0
Uniformity @ 200° C ±3.5 ±3.0
Sensitivity ±0.3°C ±0.1°C
Minutes to reach Max.
Temperature 250°
70
*Recovery Time @ 100° C 5 7 10 12
(minutes) @ 200° C 5 7 10 12
Max. Air Changes/Hr 52 34 19 52 34 10
Chamber Volume cu. ft. 2.5 4.5 5.5 2.5 4.5 5.5
liters 71.5 129 157.5 71.5 129 157.5
Net Weight lbs. 110 140 155 110 140 155
kg 50 63.5 70.3 50 63.5 70.3
Dimensions (D x W x H)
Chamber inches 15-3/4x18-1/2x15 15-3/4x18-1/2x27 15-3/4x18-1/2x33 15-3/4x18-1/2x15 15-3/4x18-1/2x27 15-3/4x18-1/2x33
mm 400x470x381 400x470x686 400x470x838 400x470x381 400x470x686 400x470x838
**Overall inches 21-1/4x24x28 21-1/4x24x40 21-1/4x24x46 21-1/4x24x28 21-1/4x24x40 21-1/4x24x46
mm 540x610x711 540x610x1016 540x610x1168 540x610x711 540x610x1016 540x610x1168
Electrical 50/60 Hz 115V 1300W 11.3A 1800W 15.6A N/A N/A 1300W 11.3A 1800W 15.6A N/A N/A
230V 1300W 5.6A 1800W 7.8A 2100W 9.1A 1300W 5.6A 1800W 7.8A 2100W 9.1A
Shipping Dimensions in. 25x26x31-1/4 25x26x43-1/4 25x26x49-1/4 25x26x31-1/4 25x26x43-1/4 25x26x49-1/4
Shipping Weight lbs. 135 165 180 135 165 180
Max Number of Shelves 6 12 15 6 12 15
***Shelves Supplied 2
Shelf Dimensions in. 15.5 x 18
mm 390 x 455
Catalog Number 115V 3166792 3166794 - - 3166797 3166799 - -
230V 3166793 3166795 3166796 3166798 3166800 3166801
“* Door Open for 30 seconds
** Overall height includes vent cap and adjustable feet
*** Spacing between shelves is 1-7/8” (48mm)
3177885 Thelco Oven 5-1Thermo Electron Corporation
Section 5 Installation
Caution Installation should be completed by qualified instrument
personnel only.
V
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 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 6 inches between them. The four legs on the bottom of the
oven can be turned to raise or lower the corners of the oven so that it sits
level on the table.
Warning For personal safety, this apparatus must be properly grounded.
V
Most units detailed in this manual are equipped with three-pronged
(grounded) plug power cords. These mate with standard three-prong
receptacles to minimize the possibility of electric shock. The user should
have the wall receptacle and circuit checked by a qualified electrician to
make sure the receptacle is properly grounded.
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.
Warning Do not, under any circumstances, cut or remove the third
(ground) prong from the power cord. Do not use a two-prong adapter.
V
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.
Location
Electrical
Connections
5-2 3177885 Thelco Oven Thermo Electron Corporation
Section 5
Installation
Caution Be sure that the power supply is of the same voltage as specified
on the nameplate.
V
Caution Be sure the wall receptacle is readily identifiable and easily reached
to disconnect the unit from the power source.
V
Model 6557 115-volt units (Cat. No. 3166789) are equipped with nonstandard plugs (one horizontal and one vertical blade) and will require
installation of a special matching receptacle. To be in compliance with the
National Electrical Code, non-standard plugs and receptacles are required
to accommodate higher current draw.
The aforementioned models are rated at 15.6 amps.
Section 6 Explanation of Controls
Models 6540/6541, 6550/6551, 6542/6543,
6552/6553, 6544, and 6554
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 only be in operation with the power switch ON, and the timer not
at setting "0".
Temperature Control Knobs - Two control knobs, Temperature Control
and High Temperature Limit set the operating temperature and safety
set points respectively. The numerical graduations do not refer to any
specific temperature, but are simply for reference.
Temperature Control Pilot Lamps - These lamps indicate the status of the
controls. 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. The
lamp above the High Temperature Limit is illuminated only when first
set. If this lamp is ON, it indicates that oven is controlling on the High
Temperature Limit thermostat which has taken over control of from the
Temperature Control thermostat.
When the High Temperature Limit lamp comes on it is due to either a
Temperature Control thermostat failure or that the High Temperature
Limit thermostat is set too close in value to the temperature control. In
this case a slight turn clockwise for the High Temperature Knob should
increase the span between them.
Timer - The timer controls how long the oven will stay on if a predeter-
mined time between one to twelve hours is desired. With the Timer set
to the HOLD position the oven will run continuously. If the Timer
knob is first turned past two hours then set to some value the oven will
then turn off after that value has timed out.
Glass Thermometer - Used to indicate oven temperature and determine
proper thermostat settings.
Light Switch - Turns interior lamp on and off.
3177885 Thelco Oven 6-1Thermo Electron Corporation
Models 6545/6546, 6555/6556, 6547/6548,
6557/6558, 6549, and 6559
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".
Digital Displays - Three digital displays show actual temperature, set point
temperature and hours.
Arrows - The arrow buttons will allow you to increment (^) or decrement
(v) the displayed temperature or time set point values.
Temp - The Temp button will allow you to select a set point value for
desired temperature.
High Limit - The High Limit button will allow you to select a set point
value for the desired high temperature limit.
Set - The Set button will allow you to enter the value you have selected
with the arrow buttons when you are either in Temp or High Limit
mode.
Mute - The Mute button will silence the audible alarm if activated.
Timer - The Timer Button will put the oven into either Continuous or
Timed mode, as indicated by the Hours digital display. When in
Continuous mode, the display will show -- (dashes); the Continuous
lamp is illuminated, and the oven runs constantly. When in Timed
mode, the display will show a numeral.
Start/Stop Button - The Start/Stop button is used to start the Timed oper-
ation or to interrupt the Timed cycle. When the Timed lamp is illuminated, the oven will remain at the set point temperature for the time displayed. When the lamp is not illuminated, the oven is not heating and
the length of running time can be selected in hour increments using the
arrow buttons.
Light On/Off - The Light ON/OFF switch operates the interior chamber
lamp.
6-2 3177885 Thelco Oven Thermo Electron Corporation
Section 6
Explanation of Controls
Section 7 Operation
Warning This equipment has reachable hot surfaces. The operator should
take any precaution to avoid contact with these parts.
V
Fully open the exhaust vent shutter cap on the top of the oven and keep it
open at all times. However, if the running the oven at the maximum rated
temperature it may be necessary to turn the cap to a more closed position
to retain heat.
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. Try to position the shelves so
they can be withdrawn more than halfway without falling. 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.
3177885 Thelco Oven 7-1Thermo Electron Corporation
7-2 3177885 Thelco Oven Thermo Electron Corporation
Section 7
Operation
Models 6545/6546, 6555/6556, 6547/6548,
6557/6558, 6549, and 6559
1. Press the ON/OFF switch for power to the ON position.
2. Set desired temperature by depressing TEMP button once and use
arrow keys to raise or lower to desired value. When desired value is
displayed in the SET POINT window press the SET button.
3. Set desired high limit value by depressing HIGH LIMIT button and
use arrow keys to raise or lower desired values. This value MUST BE
at least 5° higher than the TEMP set point value previously set. If not,
the display will blink "Hi" until an appropriate value is selected. When
desired high temp limit value is shown in the SET POINT window,
press the SET button.
4. If you wish to run the oven continuously, the Continuous lamp should
be on. If it is not, depress the Timer button to light the Continuous
lamp. If you wish to run the oven for a set number of hours, depress
the Timer button again; a "0" will be displayed. Use the arrow buttons
to enter the desired number of running hours in one hour increments.
Press the Start/Stop button once to start timed operation.
5. If the actual temperature exceeds the entered high limit value, the
HIGH LIMIT thermostat circuit will take over and the alarm will
sound. Depress the MUTE button to silence the alarm and check
Maintenance and Servicing.
6. If the set point of the oven is lowered while the oven is still hot, and the
new HIGH LIMIT value selected is less than the previous SET
POINT, the high limit alarm will sound until the oven cools to below
the new HIGH LIMIT value. This is normal; press MUTE to silence
the alarm.
3177885 Thelco Oven 7-3Thermo Electron Corporation
Section 7
Section title
Models 6540/6541, 6550/6551, 6542/6543,
6552/6553, 6544, and 6554
A mercury-in-glass thermometer is provided for the models listed above.
Insert thermometer through the hole in the vent shutter cap so 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 top of the cap. The
metal fingers may have to be bent slightly to grip the thermometer.
1. Press the ON/OFF power switch to the "ON" position.
2. Turn the Timer knob to the “Hold” position.
3. Rotate the High Temperature Limit knob fully clockwise.
4. Rotate the Temperature Control knob to some median position.
5. Allow sufficient time for the chamber to heat and observe the
temperature on the thermometer in the vent cap. The lamp above the
Temperature Control Knob should turn on and off at fairly regular
intervals to indicate that control has stabilized at a particular set point.
6. If thermometer indicates that chamber temperature is belo
w desired set
point, and the lamp above Temperature Control has been turning on
and off, rotate Temperature Control slightly clockwise
. Turn
Temperature Control slightly counter
clockwise if the thermometer
indicates chamber temperature is abo
ve the desired setpoint.
7. When thermometer indicates chamber is at desired temperature and
the lamp above Temperature Control is cycling on and off at fairly
uniform intervals, begin to turn High Temperature Limit Knob slowly
counterclockwise. The moment the lamp above High Temperature
illuminates, the lamp above Temperature Control turns off. Rotate
High Temperature Limit clockwise just until the lamp above High
Temperature Limit is off and the lamp above Temperature Control
turns on. The High Temperature Limit has now been properly set.
8. Timed Control - The Timer knob, set in the Hold position, allows the
oven to run continuously. To run the oven for any predetermined time
between one to twelve hours, first set the oven temperature, using the
Temperature Control and High Temperature Limit knobs as previously
explained, with the Timer in Hold position. When the oven is holding
the desired temperature, turn Timer knob past 2, then set to desired
number of hours for the oven to run. When the timer runs out, the
oven shuts off.
9. To turn off the oven, press power switch to OFF position. Controls
may be left in position to resume at the same temperature later.
Safety
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 1" (2.5 cm) should be left between objects placed on the
shelves.
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 from the sidewall diffuser panels.
V
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
Thermo.
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 for 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.
6. These ovens are not intended for food service or the preparation of
meals.
Caution DO NOT store containers filled with acidic or caustic solutions
within the chamber, as vapors from these materials will attack the chamber
interior and electrical components, thus voiding the warranty.
V
Warning Explosion, implosion or the release of toxic or flammable gases
arising from material being heated is the sole responsibility of the user.
V
7-4 3177885 Thelco Oven Thermo Electron Corporation
Section 7
Operation
Loading
Stainless steel will resist corrosion; however, it is not impervious to it.
Proper maintenance of the stainless steel bath chamber will help assure
many years of service.
Caution Avoid spilling harsh chemicals inside the chamber, as corrosion of
the stainless steel may result.
V
Important The user has the responsibility for carrying out appropriate
decontamination if hazardous material is spilt on or inside the chamber.
V
The chamber should be cleaned regularly with mild soapy water and rinsed
with distilled water. Should algae or other undesirable microorganisms
form inside the chamber, add a little formaldehyde or quaternary
ammonium germicide, available from Thermo (P/N 3166250).
Important If it is necessary to use the following chemicals, limit the time to
a maximum of four hours. Clean surfaces immediately after use.
V
Caution Do not use other cleaning or decontamination methods without
first contacting the Technical Services department.
V
Never use the following chemicals:
3177885 Thelco Oven 7-5Thermo Electron Corporation
Section 7
Operation
Cleaning
-Aluminum Chloride -Barium Chloride
-Bichloride of Mercury -Calcium Chloride
-Carbolic Acid -Chlorinated Lime
-Citric Acid (boiling) -Dakin's Solution
-Ferrous Chloride -Mercury Salts
-LysolMercuric Chloride -Phenol
-Potassium Permanganate -Stanous Chloride
-Potassium Thiocyanate -Tartaric Acid
-Sodium Hypochlorite
-Aqua Regia -Ferric Chloride
-Iodine -Sodium Azide
-Sulfuric Acid
Removing Discoloration: Should the stainless steel ever become discolored
by iron rust, use the following procedure to remove all traces of the rust
and restore the stainless steel.
Warning Observe the following safety precautions! Use heavy gloves or
other adequate hand protection. Wear goggles or other adequate eye
protection. Only work in areas with adequate ventilation.
V
Prepare a solution of 20% nitric and 1.5% hydrochloric acid (if preferred,
a 2% to 5% solution of warm oxalic acid may be used). Swab solution over
surface, allowing it to remain until all rust is loosened. This will usually
take 1 to 2 minutes.
As soon as rust is loosened, immediately flush with clean water until all
acid is removed.
Test the operation of the Hi-Limit thermostat, as described in Section 8,
every three months.
7-6 3177885 Thelco Oven Thermo Electron Corporation
Section 7
Operation
Periodic Safety
Check
Section 8 Maintenance and Service
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 supplied.
Disconnecting any component from the circuit without prior removal of
the power source may cause damage to other circuit components.
V
1. Make sure vent shutter cap is not closed. Open to the maximum
position.
2. Test the unit when empty; if results are satisfactory the chamber was
improperly loaded. Redistribute the load.
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 difference 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.
3177885 Thelco Oven 8-1Thermo Electron Corporation
Temperature Variance
or Fluctuation
8-2 3177885 Thelco Oven Thermo Electron Corporation
Section 8
Maintenance and Servicing
Temperature Offset
A temperature offset may be required to match a stable oven's actual
temperature display to a calibrated thermometer. This is normal and can be
adjusted as follows:
1. Allow the oven to stabilize.
2. Press the TEMP button twice; the Actual display will read "OFF".
3. Press the arrow buttons to make the SET POINT display agree with the
calibrated thermometer reading.
4. Press SET. The SET POINT display will show the desired set point. The
ACTUAL display will agree with the thermometer. The oven will heat or
cool as required to the desired set point.
Note A resistance decade box capable of .01 ohm resolution is required for
this procedure.
V
1. Turn oven power off and disconnect from power.
2. Open control panel by removing top screws which secure it. Lift and pull
out.
3. Disconnect temperature sensor from CPU board and replace with decade
box set at 100.00 ohms.
4. Reconnect oven to power source.
5. Press SET button while turning oven on.
6. Press SET button again, and use the up arrow button to make the
display read "12". Press the set button again.
7. Be sure the decade box is set to 100.00 ohms, then press the down arrow
button. The display should read "100". Press the SET button.
8. Set the decade box to 200.00 ohms, then press the down arrow button.
The display should read "200". Press the SET button.
9. The oven is now calibrated. Turn oven power off and disconnect from
power. Remove decade box and reconnect temperature sensor.
10. Close control panel and secure.
Calibration (Digital
Models Only)
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 4 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.
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 reading with the ohm
meter. Again, it is imperative that the unit be completely disconnected
from its electrical power source before any readings are taken.
V
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 heater and a bare 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 ground and should
be replaced. Also, inspect all wires leading to the heater for signs of
shorting or electrical contact to chassis of oven.
3177885 Thelco Oven 8-3Thermo Electron Corporation
Section 8
Section title
Heat Loss
Heater Resistance
Check
Section 9 Parts Replacement
Part replacement procedures follow.
1. Disconnect power.
2. Remove screws in front which secure lower oven floor and lift out.
3. Disconnect heater terminals and heater mounting screws.
4. Replace with new heater, reinstall in reverse order.
1. Disconnect power.
2. Open door as wide as possible.
3. Open control panel by removing two top screws. Set panel down,
exposing controls.
4. Unplug the heater connection located on the board.
5. Remove 2 screws from stainless steel flange just above control panel.
6. The chamber floor is now free. Pull forward and lift out.
7. Disconnect heater leads.
8. Remove heater leads and connector from the opening in control panel.
9. Replace heater leads by reversing these steps.
3177885 Thelco Oven 9-1Thermo Electron Corporation
Heater Replacement
Heater Wire
Replacement
9-2 3177885 Thelco Oven Thermo Electron Corporation
Section 9
Parts Replacement
1. Disconnect power.
2. Remove back panel screws.
3. Remove screws in front which secure lower oven floor and lift out.
4. Pull probe straight out.
5. Open control panel by removing top screws which secure it and
disconnect probe terminals.
6. Replace with new probe, reinstall in reverse order.
1. Disconnect power.
2. Remove screws in front which secure lower oven floor and lift out.
3. Disconnect heater terminals and heater mounting screws, remove
heater.
4. Detach blower wheel from motor shaft.
5. Open control panel by removing top screws which secure it and
disconnect motor terminals.
6. Remove motor mounting bracket from underside of oven. Turn oven
on its back or side to facilitate this removal.
7. Replace with new motor, reinstall in reverse order.
1. Disconnect power.
2. Open control panel by removing top screws which secure it and
disconnect leads to control pcb.
3. Remove adjustment knob from potentiometer shaft.
4. Remove control pcb from standoffs.
5. Replace with new control PCB.
6. Reinstall in reverse order.
Probe Replacement
Motor Replacement
(Mechanical Models)
Control Replacement
(Analog Models)
1. Disconnect power.
2. Open control panel by removing top screws which secure it and
disconnect electrical leads.
3. Remove control PCB from face of panel or power PCB from control
base by removing mounting nuts.
4. Replace with new PCBs, reinstall in reverse order.
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.
1a. Replace door gasket by removing the screws which secure inner door
liner. Reassemble in reverse order.
2a. Replace door latches by removing inner door liner, door gasket and
door insulation.
3a. Unscrew door latch clips and replace latches.
4a. Reassemble in reverse order.
1b. Replace door handle by removing inner door liner, door gasket and
door insulation.
2b. Remove nuts which secure door handle and replace handle.
3b. Reassemble in reverse order.
3177885 Thelco Oven 9-3Thermo Electron Corporation
Section 9
Section title
Control Replacement
(Digital Models)
Door and Latch
Repair
9-4 3177885 Thelco Oven Thermo Electron Corporation
Section 9
Parts Replacement
1. Disconnect power.
2. Remove screws which secure door latch grabber and remove from
front.
Note Used retaining nuts will fall into oven body.
V
3. Insert replacement latch assembly through open slot and fasten with
screws and washer provided.
Door Latch Grabber
(on body of oven)
3177885 Thelco Oven 10-1Thermo Electron Corporation
Section 10
Replacement Parts List
Replacement Parts List - Thelco Oven - All Models
Model 70 (All) 130 (All) 160 (All)
Part Number Description
3167086 Door Assembly X
3167075 Door Assembly X
3167076 Door Assembly X
3166214 Shelf Kit X X X
3167014 Kit, Oven Packaging Small (120V) X
3167019 Kit, Oven Packaging Small (230V) X
3164530 Kit, Oven Packaging Med. X
3164531 Kit, Oven Packaging Large X
3167249 Door Gasket Kit X X X
3175318 Switch, DPST, Non-Lighted X X X
3167186 Leveling Foot Kit X X X
3175511 Heater - 1100 Watts X
3175512 Heater - 1600 Watts X
3175513 Heater - 1900 Watts X
3176552 Cord and Plug Set X
3176562 Cord Set 14GA X
3176559 Line Cord 220V 3 Conductor X X X
3177386 Vent Shutter Cap X X X
3164520 Door Handle X
3164521 Door Handle X X
3167037 Latch Replacement Kit X X X
3172450 Mains Fuse (230V) X X X
3179482 Power Cord (230V) X X X
10-2 3177885 Thelco Oven Thermo Electron Corporation
Section 10
Replacement Parts List
Replacement Parts List - Thelco Oven - Digital Models
Model 70D 130D 160D 70DM 130DM 160DM
Part Number Description
3166924 Power Supply Kit X X X X X X
3176704 Keyboard Digital Oven X X X X X X
3176705 PCB Assembly High Limit X X X X X X
3176706 PCB Assembly C.P.U. X X X X X X
3176738 RTD Sensor X X X X X X
3176758 Interface, High Limit X X X X X X
3167193 Fuse Kit 1/4A 250V (115V) X X X X X X
3175930 Fuse FST 6.3x32 63mA (230V) X X X X X X
3175897 Blower Wheel X X X
3166987 Motor Assembly (115V) X X
3167015 Motor Assembly (230V) X X X
3176726 Wiring Harness X X X X X X
3176736 Interface Cable X X X X X X
3162397 Bottom Plate, Mechanical X X X
3162398 Bottom Plate, Gravity X X X
3177885 Thelco Oven 10-3Thermo Electron Corporation
Section 10
Replacement Parts List
Replacement Parts List - Thelco Oven - Analog Models
Model 70 130 160 70M 130M 160M
Part Number Description
3167193 Fuse Kit 1/4A 250V X X X X X X
3175931 Fuse, FST 6.3x32 31mA X X X X X X
3175897 Blower Wheel X X X
3166987 Motor Assembly 115V X X
3167015 Motor Assembly 230V X X X
3176028 Timer, 12 Hr. Mechanical X X X X X X
3174903 Knob, Analog Timer X X X X X X
3176728 Wiring Harness X X X X X X
3174903 Knob, Temperature X X X X X X
3162433 Light Assembly 115V X X X X
3162434 Light Assembly 230V X X X X X X
3167189 Temperature Controller PCB Kit X X X
3167188 Hi-Limit Controller PCB Kit X X X 2 2 2
3176739 RTD Assembly, 1000 0HM X X X X X
Accessory List - Thelco Oven
Model 70 130 160 70M 130M 160M
Part Number Description
3175130 Bulb, 40W 120V X X X X
3175131 Bulb, 50W 230V X X X X X X
3175996 Thermometer 0-250°C X X X X X X
3166245
RS-232 Interface Kit
(Digital Models Only)
X X X X X X
3177885 Thelco Oven 11-1Thermo Electron Corporation
Section 11
Electrical Schematics
LINE
115OR230V.
50/60 HZ.
WHITE
GREEN
BLACK
N.O. 2
4
5
4
5
C1
1
2
M1
F1
1/4 AMP
SLO-BLO
___
___
___
HIGH LIMIT
SENSOR
INNER CHAMBER
LIGHT
CHAMBER LIGHT
1
POWER
2
TIMER SWITCH
BLOWER MOTOR
HIGH
CONTROLLER
TEMPERATURE
CONTROLLER
S2
SWITCH
S1
S3
LIMIT
SWITCH
EMR1-1
HIGH
LIMIT
INDICATO
___
___
___
TEMPERATURE
SENSOR
EMR2-1
TEMPERA
TURE
INDICATO
R
R
HR1-1
HR1-1
HR1-2
HR1-2
HR1-3
HR1-3
HEATER CONNECTION
FOR 115 V.
HEATER CONNECTION
FOR 230 V.
CONTROL CIRCUIT DIAGRAM
THELCO ANALOG OVENS
MECHANICAL AND GRAVITY
391202
11-2 3177885 Thelco Oven Thermo Electron Corporation
Section 11
Electrical Schematics
BK
TB1-3 TB1-2
TEMPERATURE
CONTROL
BK
MOTOR
CONNECTION
115V
GR
115
V
T2 T1
LAMP
HEATER
CONNECTION
115V
OR
TN
TN TN
TB1-2
TB1-1
BK
"TEMP HOT"
230
V
RTD RTD
TB1-1
1/4 AMP SLO-BLO
BK
WH
BK
CONNECTION
YL
TB1-3 TB1-2
BK
BK
T7 T6 T5 T4 T3 T2 T1T7 T6 T5 T4 T3 T2 T1
MOTOR
230V
GR
HEATER
CONNECTION
OR
TB1-2
TB1-3 TB1-2 TB1-1
BK
BK
WH
230V
WH
BK
GR
CHAMBER
LIGHT
TN
5
41
5
41
BK
REVISIONS
MR / MR
D.G./ADL
2
2
TN
WH
22MAR99
S2
LIGHT
SWITCH
WH
S1
POWER
SWITCH
LINE
115 VAC
OR
230 VAC
12-6-93
LTR ECN ENGR / DFTR DATE INIT
27749
RELEASE NEW DRAWING
A
UPDATE FILE FORMAT AND P/N'S
TNTN
TB1-1
BK
C1
N.O.2
TIMER
SWITCH
BK
TEMPERATURE CONTROLLER
GRAVITY MODELS: P/N 34384801
MECHANICAL MODELS: P/N 34384802
RTD SENSOR RESISTANCE:
1000.0 OHMS @ 0°C
1097.3 OHMS @ 25°C
HEATER COLD RESISTANCE
ACROSS BOTH COILS
HEATER
PART NO.
34247439
34247440
34247441
WATTS
1100
1600
1900
OHMS
47
32.5
27.2
HIGH LIMIT CONTROLLER
ALL MODELS: P/N 34384802
A
I
MODEL NO.
DRAWN
CHECKED
ENGINEER
MATERIAL:
FINISH:
CNC
MNC
SEE PARTS LIST
P
12-6-93
12-6-93
S
DWG. TITLE
SIZE
A
BK
"HL HOT"
230
115
V
V
T2 T1
CONTROL WIRING DIAGRAM
THELCO ANALOG OVENS
MECHANICAL AND GRAVITY
SHEET
SCALE
10F1
NONE
DWG. NO.
383202
REV.
A
3177885 Thelco Oven 11-3Thermo Electron Corporation
Section 11
Electrical Schematics
LINE
115OR230V.
50/60 HZ.
WHITE
GREEN
BLACK
4
5
4
5
1
2
M1
INNER CHAMBER
LIGHT SWITCH
CHAMBER LIGHT
1
POWER SWITCH
2
BLOWER MOTOR
S2
S1
POWER SUPPLY
HIGH LIMIT
LED
HEAT ON
LED
DISPLAY PCB
16 COND
SSR
16 COND
TEMPERATURE
SENSOR
RTD
______
___
CPU
HIGH LIMIT PCB
EMR
5 COND
___
___
HIGH LIMIT
SENSOR
SSR-1
EMR-1
HR1-1
HR1-1
HR1-2
HR1-2
DWG.TITLE
SIZE
D
HR1-3
HEATER CONNECTION
FOR 115 V.
HR1-3
HEATER CONNECTION
FOR 230 V.
CONTROL WIRING DIAGRAM
THELCO DIGITAL OVENS
MECHANICAL AND GRAVITY
SHEET
SCALE
1OF1
FULL
DWG.NO.
REV.
A
11-4 3177885 Thelco Oven Thermo Electron Corporation
Section 11
Electrical Schematics
-----
-
J201
B
NONE.
1OF1
P
R
E
C
IS
IO
N
S
C
I
E
N
T
I
F
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,
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N
C
.
P
O
W
E
R
S
U
P
P
L
Y
P
C
B
A
S
S
Y
P
/N
34372
5
0
1
1
1
1
1
J1
0
5
J102
J1
0
1
J1
0
4
J1
0
3
BLK
BLK
BLK
BLK
WHT
WHT
WHT
BLK
----
1600
1100
H
EA
TE
R
32.5
47
------
34247440
34247439
----
P
A
R
T
N
O
.
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A
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IA
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TS
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.
PARTS LIST
N
o
.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
1
1
1
1
1
1
1
1
1
2
P
C
B
A
S
S
E
M
B
LY
P
O
W
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R
S
U
P
P
LY
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M
P
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R
P
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,115V
.
IN
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FA
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C
A
B
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A
S
S
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M
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IT
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IG
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IT
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IN
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LO
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K
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O
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ITIO
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S
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E
N
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,H
IG
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IT
1
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2
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E
Y
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IG
ITA
LO
V
E
N
LIN
E
C
O
R
D
LA
M
P
H
O
LD
E
R
660W
600V
B
U
LB
40W
115V
.
A
DWG.NO.
REV.
SIZE
SCALE
SHEET
DWG. TITLE
THELCO DIGITAL OVENS, 115 V
MECHANICAL AND GRAVITY.
383301
CONTROL WIRING DIAGRAM
BLACK
WHITE
LINE
115 V.
60 HZ.
GREEN
FRAME
GROUND
HEATER
HR1
HR1-2
HR1-1
HR1-3
3
2
1
3
2
1
TB1
L1
ORN
BLK
FRAME
GROUND
GRN
POWER
ON/OFF SWITCH
4
5
2
1
4
1
5
2
LIGHT
INNER CHAMBER
ON/OFF SWITCH
J302
J304
J303
CPU PC
BASSY
P/N 34381001
PRECISION SCIENTIFIC,INC
.
J301
1
2
4
5
"ON"
TOP
1
2
4
5
"ON"
TOP
P
R
E
C
IS
IO
N
S
C
IE
N
T
IF
IC
,I
NC
.
H
IG
H
LIM
IT
C
O
N
T
R
O
LL
E
R
3438
07
0
1
TOP OF CONTROL PANEL
11
17
16
15
15
14
13
11
10
9
7
5
NOTE CORRECT
ORIENTATION OF LIGHT
ON/OFF SWITCH
NOTE CORRECT
ORIENTATION OF POWER
ON/OFF SWITCH
100 OHMS @ 0°C
138.5 OHMS @ 100°C
100 OHMS @ 0°C
138.5 OHMS @ 100°C
6
3
2
1
8
PIN #1.
PIN #1.
PIN #1.
4
O
HM
S
170 Marcel Drive Winchester, VA 22602
Jouan
3177885 Thelco Oven 11-5Thermo Electron Corporation
Section 11
Electrical Schematics
8
100 OHM
S@
0°C
138.5 OHMS @
100°C
100 OHMS @
0°C
138.5 OH
M
S@
100°C
6
3
2
1
P
IN
#
1
.
P
IN
#
1.
P
IN
#1
.
4
OHMS
J201
1OF1
NONE.
B
PRECISION SCI ENTIFIC, INC.
POWER SUPPLY PCB ASSY
P/N34372501
1
1
1
1
J105
J102
J
101
BLK
BLK
BLK
BLK
W
HT
W
HT
W
HT
BLK
1900
1600
1100
HEATER
32.5
47
HEATER COLD RESISTANCE
BETWEEN HR1-1 AND HR1-3
34247441
34247440
34247439
27.2
PART NO.
WATTS
1
TRIAC HEAT SINK
DESCRIPTION
QTY.
PARTS LIST
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
1
1
1
1
1
1
1
1
1
2
PCB ASSEMBLY POWER SUPPLY
JUMPER PLUG, 240 V.
INTERFACE CABLE ASSEMBLY
PCB ASSEMBLY C.P.U.
MOTOR ASSEMBLY
HEATER
PCB ASSEMBLY, HIGH LIMIT
TERMINAL, BLOCK 3 POSITIONS
SENSOR, HIGH LIMIT
-----
1
1
1
1
2
KEYBOARD, DIGITAL OVEN
LINE CORD
LAMPHOLDER 660W 600V
BULB 50W 230V.
A
D
W
G
.N
O
.
R
E
V
.
S
IZ
E
S
C
A
L
E
S
H
E
E
T
D
W
G
.T
IT
L
E
THELCO DIGITAL OVENS
M
ECHANICAL AND G
RAVITY, 230 V
390101
CONTROL W
IRING DIAGRAM
BLACK
WHITE
LINE
230 V.
60 HZ.
GREEN
FRAME
GROUNDHEATER
HR1
HR1-2
HR1-1
HR1-3
3
2
1
3
2
1
TB1
L1
ORN
YEL
FRAME
GROUND
GRN
POW
ER
ON/OFF SW
ITCH
4
5
2
1
4
1
5
2
LIGHT
INNER CHAMBER
ON/OFF SWITCH
J302
J304
J303
CPU PCB ASSY
P/N 34381001
PRECISION SCIENTIFIC, INC.
J301
1
2
4
5
"ON"
TOP
1
2
4
5
"ON"
TOP
PRECISIONSCIENTIFIC, INC.
HIGHLIMIT CONTROLLER
34380701
TOP OF CONTROL PANEL
11
17
16
15
15
14
13
11
10
9
7
5
NOTE CORRECT
ORIENTATION OF LIGHT
ON/OFF SW
ITCH
NOTE CORRECT
ORIENTATION OF POW
ER
ON/OFF SWITCH
3177885 Thelco Oven 12-1Thermo Electron Corporation
Section 12
Warranty Information
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 1-740-
373-4763. W
e're ready to answer your questions on equipment warranty
, operation, maintenance, service and special appli-
cation. Outside the USA, contact your local distributor for warranty information.
Rev. 2 1/03
ISO
9001
REGISTERED
12-2 3177885 Thelco Oven Thermo Electron Corporation
Section 12
Warranty Information
THERMO ELECTRON CORPORATION INTERNATIONAL DEALER WARRANTY
The W
arranty Period st
art
s two months from the date your equipment is shipped from our facility. This allows for shipping
time so the warranty will go into ef
fect at approximately the same time your equipment is delivered.
The warranty protec-
tion extends to any subsequent owner during the first year warranty period. Dealers who stock our equipment are allowed
an additional six months for delivery and inst
allation, provided the warranty card is completed and returned to the Technical
Services Dep
artment.
During the first year
, component p
art
s proven to be non-conforming in materials or workmanship will be rep
aired or replaced
at
Thermo's expense, labor excluded. Inst
allation and calibration are not covered by this warranty agreement.
The Technical
Services Dep
artment must be cont
acted for warranty determination and direction prior to performance of any rep
airs.
Expendable items, glass, filters, reagent
s, tubing, and gasket
s are excluded from this warranty
.
Replacement or rep
air of component
s p
art
s or equipment under this warranty shall not extend the warranty to either the
equipment or to the component p
art beyond the original warranty period.
The Technical Services Dep
artment must give prior
approval for return of any component
s or equipment.
At
Thermo's option, all non-conforming p
art
s must be returned to
Thermo post
age p
aid and replacement p
art
s are shipped FOB destination.
THIS W
ARRANTY
IS EXCLUSIVE
AND IN LIEU OF
ALL
OTHER W
ARRANTIES, WHETHER WRITTEN, ORAL
OR
IMPLIED. NO W
ARRANTIES OF MERCHANT
ABILITY
OR FITNESS FOR AP
ARTICULAR PURPOSE SHALL
APPLY.
Thermo shall not be liable for any indirect or consequential damages including, without limit
ation, damages relating to lost
profit
s or loss of product
s.
Y
our local
Thermo Sales Of
fice is ready to help with comprehensive site prep
aration information before your equipment
arrives. Printed instruction manuals carefully det
ail equipment inst
allation, operation and preventive maintenance.
If equipment service is required, please call your Technical Services Dep
artment at 1-888-213-1790 (USA
or Canada), or
1-740-373-4763. W
e're ready to answer your questions on equipment warranty
, operation, maintenance, service and spe-
cial application. Out
side the USA, cont
act your local distributor for warranty information.
ISO
9001
REGISTERED
Thermo Electron Corporation
Controlled Environment Equipment
401 Millcreek Road
Marietta, Ohio 45750
United States
www.thermo.com
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