BARNSTEAD|THERMOLYNE FB1310M, FB1315M, FB1310M-26, FB1318M, FB1310M-33 Operation And Repair Manual And Parts List

BARNSTEAD|THERMOLYNE CORPORATION

Type FB1300 & FB1400

Furnaces

OPERATION AND REPAIR MANUAL

AND PARTS LIST

SERIES 1256 & 1257

Model Numbers

FB1310M, FB1310M-26, FB1314M, FB1315M, FB1318M,FB1310M-33

FB1410M, FB1410M-26, FB1414M, FB1415M, FB1418M, FB1410M-33

LT1256X1 • 8/27/01 Serial Number

Table of Contents

Safety Information ..............................................................................................................................................3

Important Information....................................................................................................................................3

Warnings ......................................................................................................................................................4

Introduction..........................................................................................................................................................5

Intended Use ................................................................................................................................................5

General Usage..............................................................................................................................................5

Principles of Operation ................................................................................................................................5

General Specifications ........................................................................................................................................6

Declaration of Conformity ............................................................................................................................7

Unpacking ..........................................................................................................................................................8

Installation ..........................................................................................................................................................9

Site Selection................................................................................................................................................9

Electrical Connections..................................................................................................................................9

Operation ..........................................................................................................................................................10

Power Switch..............................................................................................................................................10

Cycle Light..................................................................................................................................................10

Door Safety Switch ....................................................................................................................................10

Single Setpoint Controller ................................................................................................................................10

Basic Operation ..........................................................................................................................................11

Buttons and Indicators................................................................................................................................11

To View or Change the Setpoint ................................................................................................................12

To View the Display Units ..........................................................................................................................12

To View the % Output Power......................................................................................................................12

Controller Parameters ................................................................................................................................12

Alarms ........................................................................................................................................................13

Sensor Break Protection ............................................................................................................................14

Overt Temperature Protection (OTP)..........................................................................................................14

Tuning ........................................................................................................................................................15

Furnace Loading ..............................................................................................................................................16

Preventive Maintenance....................................................................................................................................17

Troubleshooting ................................................................................................................................................18

Maintenance and Servicing ..............................................................................................................................19

To Replace Heating Element......................................................................................................................19

To Replace Thermocouple..........................................................................................................................22

To Replace Insulation ................................................................................................................................24

To Replace Door Switches ........................................................................................................................25

To Replace Solid State Relay ....................................................................................................................26

To Replace PC Board (Controller)..............................................................................................................26

Wiring Diagram..................................................................................................................................................27

Exploded View ................................................................................................................................................28

Important Information

This manual contains important operating and
safety information. You must carefully read and
understand the contents of this manual prior to
the use of this equipment.

Your Thermolyne FB1300 Model or FB1400
Model Furnace has been designed with function,
reliability, and safety in mind. It is your responsi­bility to install it in conformance with local elec­trical codes. For safe operation, please pay
attention to the alert signals throughout the man­ual.

Warnings

To avoid electrical shock, this furnace must:

1. Use a properly grounded electrical outlet
of correct voltage and current handling
capacity.

2. Be disconnected from the power supply
before servicing.

3. Have the door switch operating properly.

To avoid burns:

1. “Caution: Hot Surface. Avoid Contact.”
Do not touch the exterior or interior sur­faces of the furnace during use or for a
period of time after use.

To avoid personal injury:

1. Do not use in the presence of flammable
or combustible materials — fire or explo­sion may result. This device contains
components which may ignite such
material.

2. Refer servicing to qualified personnel.

Safety Information

Alert Signals

Warning

Warnings alert you to a
possibility of personal injury.

Caution

Cautions alert you to a
possibility of damage to the
equipment.

Note

Notes alert you to pertinent facts
and conditions.

Hot Surface

Hot surfaces alert you to a
possibility of personal injury if
you come in contact with a
surface during use or for a
period of time after use.

Please note the following WARNINGS:

WARNING

This warning is presented for compliance with California Proposition 65 and other regulato­ry agencies and only applies to the insulation in this product. This product contains refracto­ry ceramic, refractory ceramic fiber or fiberglass insulation, which can produce respirable
dust or fibers during disassembly. Dust or fibers can cause irritation and can aggravate
preexisting respiratory diseases. Refractory ceramic and refractory ceramic fibers (after
reaching 1000°C) contain crystalline silica, which can cause lung damage (silicosis). The
International Agency for Research on Cancer (IARC) has classified refractory ceramic fiber
and fiberglass as possibly carcinogenic (Group 2B), and crystalline silica as carcinogenic to
humans (Group 1).

The insulating materials can be located in the door, the hearth collar, in the chamber of the
product or under the hot plate top. Tests performed by the manufacturer indicate that there
is no risk of exposure to dust or respirable fibers resulting from operation of this product
under normal conditions. However, there may be a risk of exposure to respirable dust or
fibers when repairing or maintaining the insulating materials, or when otherwise disturbing
them in a manner which causes release of dust or fibers. By using proper handling proce­dures and protective equipment you can work safely with these insulating materials and
minimize any exposure. Refer to the appropriate Material Safety Data Sheets (MSDS) for
information regarding proper handling and recommended protective equipment. For addi­tional MSDS copies, or additional information concerning the handling of refractory ceramic
products, please contact the Customer Service Department at Barnstead|Thermolyne
Corporation at 1-800-553-0039.

SAFETY INFORMATION

Intended Use

The FB1300 Model and FB1400 Model fur­naces are general purpose laboratory and heat
treating furnaces. For optimum element life,
observe the following temperature ranges:
100°C (212°F) to 982°C (1800°F) for continuous
use, or from 982°C (1800°F) to 1100°C
(2012°F) for intermittent use. Continuous use is
operating the furnace for more than three
straight hours, and intermittent use is operating
the furnace for less than three hours.

The unit consists of a heating chamber and a
digital controller. See Figure 1 for the overall
shape and general features of the unit.

General Usage

Do not use this product for anything other than
its intended usage.

Principles of Operation

The furnace chamber is heated by a single
three section resistant heater which is embed­ded in a refractory material. The chamber is
insulated with a ceramic fiber insulation. The
temperature is controlled by an electronic con­trol. The temperature is measured by a thermo­couple and is registered on a digital display. For
safety, door switches are incorporated to
remove power from the heating elements when
the door is opened. The furnace is supported by
the control section which also houses the elec­trical connections.

Introduction

General Specifications

FB1300 Models

Dimensions: (handle not included)

Chamber: 4” W x 3.75” H x 4.5” D (10.2 x 9.5 x 11.4 cm)

Overall : 7.9” W x 13.8” H x 8.5” D (20.0 x 34.9 x 21.6 cm)

Weight: 15.7 lb. (7.1 kg)
Electrical Ratings:

Model # Volts Amps Watts Phase Frequency
FB1310M 220-240 4.4 1060 1 50/60
FB1310M-26 220-240 4.4 1060 1 50/60
FB1310M-33 220-240 4.4 1060 1 50/60
FB1314M 100 10.6 1060 1 50/60
FB1315M 120 8.9 1060 1 50/60
FB1318M 208 5.1 1060 1 50/60

Temperature: Operating Range (continuous): 982°C; (intermittent): 1100°C.
Environmental Conditions:

Operating: 17°C - 27°C; 20% - 80% relative humidity, non-condensing. Installation
Category II (over-voltage) in accordance with IEC 664. Pollution Degree 2 in
accordance with IEC 664. Altitude limit: 2,000 meters.
Storage: -25°C - 65°C; 20% - 80% relative humidity.

FB1400 Models

Dimensions: (handle not included)
Chamber: 5.00” W x 4.25” H x 6.00” D (12.7 x 10.8 x 15.2 cm)
Overall: 9.7” W x 15.8” H x 11.1” D (24.6 x 39.0 x 28.3 cm)

Weight: 23 lb. (10.4 kg)
Electrical Ratings:

Model # Volts Amps Watts Phase Frequency

FB1410M 220-240 6.3 1520 1 50/60
FB1410M-26 220-240 6.3 1520 1 50/60
FB1410M-33 220-240 6.3 1520 1 50/60
FB1414M 100 14.5 1520 1 50/60
FB1415M 120 12 1450 1 50/60

FB1418M 208 7.3 1520 1 50/60

Temperature: Operating Range (continuous): 982°C; (intermittent): 1100°C.

Environmental Conditions:

Operating: 17°C - 27°C; 20% - 80% relative humidity, non-condensing. Installation
Category II (over-voltage) in accordance with IEC 664. Pollution Degree 2 in
accordance with IEC 664. Altitude limit: 2,000 meters.
Storage: -25°C - 65°C; 20% - 80% relative humidity.

Declaration of Conformity

Barnstead|Thermolyne hereby declares under its sole
responsibility that this product conforms with the techni­cal requirements of the following standards (-33 models
only):

EMC: EN 50081-1 Generic Emission Standard;

EN 50082-1 Generic Immunity Standard.

Safety: EN 1010-1-92 Safety requirements for

electrical equipment for
measurement,control and
laboratory use; Part I:
General Requirements

EN 1010-2-010 Part II: Particular requirements

for laboratory equipment for the
heating of materials

per the provisions of the Electromagnetic Compatibility
Directive 89/336/EEC, as amended by 92/31/EEC and
93/68/EEC, and per the provisions of the Low Voltage
Directive 73/23/EEC, as amended by 93/68/EEC.

The authorized representative located within the
European Community is:

Electrothermal Engineering, Ltd.

419 Sutton Road

Southend On Sea

Essex SS2 5PH
United Kingdom

Copies of the Declaration of Conformity are available
upon request.

GENERAL SPECIFICATIONS

Unpacking

1. Visually check for any physical
damage to the shipping container.

2. Inspect the equipment surfaces that
are adjacent to any damaged area.

3. Open the furnace door and remove
the packing material from inside the
furnace chamber.

4. Vacuum the chamber prior to use to
remove the insulation dust due to
shipment.

5. Retain the original packaging mate­rial if reshipment is foreseen or
required.

Installation

Caution

Be sure ambient temperature does
not exceed 40°C (104°F). The rec­ommended ambient temperature is
17°C - 27°C. Ambients above this
level may result in damage to the
controller.

Caution

Allow at least six inches of space
between the furnace and any com­bustible surface. This permits the
heat from the furnace case to

escape so as not to create a pos-

sible fire hazard.

Site Selection

Install furnace on a sturdy surface and allow
adequate space for ventilation.

Electrical Connections

The electrical ratings are located on the spec­ification plate on the back of the furnace.
Consult Barnstead/Thermolyne if your electri­cal service is different than those listed on the
specification plate. Be sure the front power
switch is in the OFF position before connect­ing the furnace to your electrical supply.

Warning

To avoid electrical shock, this fur­nace must always use a properly
grounded outlet of correct voltage
and current handling capacity.

Operation, All Modes

Warning

To avoid personal injury do not use
in the presence of flammable or
combustible chemicals; fire or
explosion may result. This device
contains components which may
ignite such materials.

Power Switch

Both the ON/OFF power switch and the digital
display will illuminate when power is switched

Hot Surface

Caution: Avoid Contact. To avoid
burns, this furnace must not be
touched on the exterior or interior
surfaces during use or for a period
of time after use.

ON. The furnace will begin to heat to the con­troller's current setpoint. (See the instructions
for your type of controller for information on
checking and setting the setpoint.)

Cycle Light

The amber cycle light will illuminate whenever
the power is being applied to the heating ele­ments. The cycle light will turn on and off as
the furnace reaches the setpoint.

Warning

Always wear safety glasses or a
safety shield and high temperature
gloves when loading or unloading
the furnace. Long sleeved, fire
retardant clothing and a fire retar­dant apron is also recommended.

Warning

To avoid electrical shock, the door
safety switch must be
operating properly.

Door Safety Switch

The door safety switch removes power from
the heating elements when the door is
opened. Open and close the door a few
times; note that the amber CYCLE light will
switch off when the door is opened. If this
condition is not true, consult the
Troubleshooting section before proceeding.
This check must be done when the furnace is
heating and the cycle light is illuminated.

Single Setpoint Controller

Output 1

PAGE

Button

Single Setpoint Models

Output 2

SCROLL

Button

DOWN ARROW

Button

Temperature

Display

Display

Window

UP ARROW

Button

The single setpoint model furnace controller
is a single setpoint controller which provides a
single digital display to indicate the current
chamber temperature or setpoint temperature.
This temperature controller features sensor
break protection and self-tuning capability.

Basic Operation

When the controller is turned ON it will per­form a short self-test and then display the
measured value (process value) in the HOME
DISPLAY.

Buttons and Indicators

OP1 (Output 1): Illuminates when the logic
output is ON.

OP2 (Output 2): Illuminates when the relay
output is ON (will go out during an alarm situ­ation).

PAGE button: Allows you to select a new list
of parameters.

Note

If at any time you want to return to
the HOME DISPLAY, simultane­ously press the PAGE and
SCROLL buttons.

SCROLL button: Allows you to select a para­meter within a list of parameters.

DOWN button: Allows you to decrease a
value.

UP button: Allows you to increase a value.

To View or Change the
Setpoint

To view the setpoint, press and release the
UP or DOWN buttons. If you want to change
the setpoint, continue pressing until the

SINGLE SETPOINT CONTROLLER

desired setpoint value is displayed and then
release the button. A few seconds after the button
is released, the controller will accept the new
value and revert to the HOME DISPLAY.

To View the Display Units

From the HOME DISPLAY press the SCROLL
button. The display will show the temperature
units in °C/F/K and then return to the HOME DIS­PLAY. (Call Customer Service if you require a dif­ferent temperature unit.)

To View the % Output Power

From the HOME DISPLAY press the SCROLL
button twice. Press and release the UP or DOWN
button to view the % output power. This value is a
read-only value and cannot be changed.

Controller Parameters

Home display

°C: Temperature units in Celsius. Temperature
units can not be changed without entering the
configuration. Contact Customer Service if a dif­ferent temperature unit is required.

OP: % output power demand.
IdHi: Deviation high alarm.

Al List

IdHi: Deviation high alarm.

SINGLE SETPOINT CONTROLLER

Atun List

tunE: One-shot autotune enable.

Pid List

Pb: Proportional band (in display units).
ti: Integral time in seconds.
td: Derivative time in seconds.
ACCS List Code: Access code (Code need-

ed to enter or change the other configuration
parameters which are not normally accessi­ble.) Not accessable.

Alarms

The controller will flash an alarm message in
the home display if an alarm condition is
detected.

2FSH: Measured value full scale high alarm.

IdHi: Measured value deviation high alarm.
S.br: Sensor break: check that sensor is con-

nected correctly.
L.br: Loop break: check that the heating cir-

cuits are working properly.
Ld.F: Heater Circuit fault: indication of either

an open or short solid sate relay, a blown
fuse, missing supply or open circuit heater.

Note

The following alarm messages
are factory default settings and
may vary if you have changed
the configuration of your
controller:

IDHi: = 50°C
2FSH = 1125°C

SINGLE SETPOINT CONTROLLER

Sensor Break Protection

This controller provides sensor break protection in
the event the thermocouple opens. If an open ther­mocouple condition occurs, the digital display will
blink “S.br” and the power to the heating element
will be shut OFF (Cycle light will extinguish).

Over-Temperature Protection
(OTP)

The OTP will be in effect during any alarm condi­tion when the temperature of the furnace has devi­ated beyond the limit. The “Deviation High” alarm is
the only alarm value which can be changed. To
change it, press the SCROLL button until “IdHi”
appears on the display. Press the UP or DOWN
button to select the OTP value you desire. We rec­ommend a value of 20° above your working tem­perature to provide protection for your workload.

Tuning

This controller incorporates a self-tuning feature
which determines the optimum control parameters
for the best temperature accuracy with your load
and setpoint. Use this feature the first time you use
your furnace and each time you change either your
setpoint or the type of load you are heating.
Barnstead|Thermolyne recommends you use this
feature to provide the best temperature accuracy
the controller can attain. To use the tuning feature:

1. Adjust the setpoint to your desired value.

2. Press the PAGE button until display reads,
“Atun.”

Note

Furnace must be at ambient
temperature before starting a tune.

SINGLE SETPOINT CONTROLLER

3. Press the SCROLL button. Display
will read, “tunE.”

4. Press the UP or DOWN button to
select, “on.”

5. Simultaneously press the PAGE and
SCROLL buttons to return to the
HOME DISPLAY. The display will
alternately flash between “tunE” and
the HOME DISPLAY while tuning is in
progress.

6. The controller will then turn the heat­ing on and off to induce an oscillation.
When the measured value reaches
the required setpoint the first cycle will
end.

7. Tuning will be complete after two
oscillation cycles and then the tuner
will turn itself off.

Note

Tune has completed when “tunE”
stops flashing on display.

8. Normal control function will resume
after the controller calculates tuning
parameters.

• For best results of furnace loading, use
less than two-thirds of any dimension of
the chamber. Maintain a 3/4" clearance
between the load and the sides of the
chamber.

• If you are heating a number of small
parts, spread them throughout the mid­dle two thirds of the chamber.

• Keep objects away from thermocouple.

• Raise your load up off the furnace floor
with small pieces of ceramic or a hearth
plate to promote even heating.

• Use insulated tongs and mittens when
loading and unloading furnace.

• Always wear safety glasses.

Furnace Loading

Caution

Do not overload your furnace
chamber or allow the load to
touch the thermocouple. If the
load is to be heated uniformly, it
should not occupy more than
two-thirds of any dimension of
the chamber. Failure to observe
these cautions could result in
damage to furnace components
and/or load.

Preventive Maintenance

Warning

Before using any cleaning or
decontamination method
except those recommended
by Barnstead|Thermolyne,
users should check with
Barnstead|Thermolyne that
the proposed method will not
damage the equipment.

Contamination is a major cause of element failure,
therefore, when possible, remove the fume forming
material before heating (e.g., cleaning cutting oil
from tool steel).

The resistance wire is high-grade nickel-chromium.
Some chemicals, notably sulphur, halogens, and
cyanides, attack this wire at high temperatures, so
avoid spilling these chemicals in the furnace or
heating them any hotter than necessary. The
refractory cement helps to protect the wire, but will
not completely immunize it from damage.

Warning

Disconnect the furnace from
power supply before clean­ing.

Warning

Opening the door for an
extended period of time will
cause the painted surfaces
above the door to be discol­ored or burnt.

All heating elements must be considered expend­able, and replacement is expected; however, rea­sonable care in their use will greatly extend the ser­vice they will give. As the manufacturer has no con­trol over the use or care of the elements, no specif­ic service guarantee can be made.

Housekeeping is vital to your electric furnace—
KEEP IT CLEAN! Run your furnace up to 871°C
(1600°F) empty occasionally to burn off the conta­mination that may exist on the insulation and ele­ments. Run for approximately two hours with the
door slightly open. See warning.

Element life is reduced somewhat by repeated
heating and cooling. If the furnace is to be used
again within a few hours, it is best to keep it at the
operating temperature or at a reduced level such
as 260°C (500°F).

During normal use, the thermocouple in your fur­nace can become oxidized and cause inaccurate
readings; therefore, we suggest that if you regularly
use your furnace you should change your thermo­couple once every six months to assure the accura­cy of your controller readings.

Clean by wiping the outside case of the unit with a
damp cloth and mild soap solution.

Troubleshooting

Problem Possible Causes Corrective Action

The furnace does not heat No power. Check power source and fuses or
(CYCLE light does not illuminate). breakers.

Power is not cut to heating elements Door switches are not functioning Re-align or replace door switches.
when the door is open.

Defective electrical hookup. Repair electrical hookup.
Thermocouple has oxidized and Replace thermocouple.

opened the circuit. (Open thermocouple
is indicated on the display as a
temperature of 0-5 degrees).

Fuse(s) blown Replace fuse(s).
Controller malfunction. Replace controller.
Door switches malfunction. Re-align or replace door safety switches.
Defective solid state relay. Replace output relay.

Slow heatup. Low line voltage. Install line of sufficient size and proper

Heavy load in chamber. Lighten load in chamber.
Wrong heating element. Install proper element.

Repeated element burnout. Overheating furnace. Keep furnace under maximum

Heating harmful materials. Enclose material in container. Clean up

Contamination present from Replace insulation material.
pervious burnout.

Inaccurate temperature Oxidized or contaminated Replace thermocouple.
readout. thermocouple.

Poor thermocouple connection. Tighten connections.
Improper loading procedures. Use proper loading procedures.
Poor ventilation of base. Clear area around furnace base.
Thermocouple connections Reconnect thermocouple correctly.

reversed. (Indicated by
downscaling of temperature on
display.)

voltage. (Isolate furnace from other
electrical loads.)

temperature.

spills in and on chamber. Ventilate
chamber by opening door slightly when
heating known harmful reagents.

Controller malfunction. Replace controller.

Figure 3: Replacement of a Heating Element

Maintenance and Servicing

Warning

Disconnect the furnace from the
power supply before servicing.
Refer servicing to qualified
personnel.

To Replace Heating Element

1. Set the furnace on its top. (See Figure 3).
Remove thermocouple cover. (If
equipped.)

Note

Perform only maintenance
described in this manual.
Contact an authorized dealer or
our factory for parts and
assistance.

Note

It is seldom necessary to dis­connect the thermocouple from
the controller if the thermocou­ple is in good condition.

Thermocouple cover

Porcelin
insulation

2. Remove screw and clamp holding ther­mocouple, then grasp the thermocouple
at the bend where it enters the furnace
chamber and pull straight back. Retain
porcelain insulator.

3. When the thermocouple tip is clear of the
furnace back, bend it out of the way.

4. Remove the screws holding the steel
back plate to the case.

5. Remove the steel back plate.

Step 1(if equipped)

Heating element
with rough side up

Straight edge
(or board)

Step 4

Step 2

Bend up

Step 5 Step 6

Step 3

MAINTENANCE AND SERVICING

Note

The hearth plate contains no
heating coil, and may be saved
for re-installation if it is in good
condition. The hearth plate is
replaceable independent of the
heating element.

6. Remove the back insulation block by open­ing the door and gently pushing it out.
Support this insulation block while removing
it, as it is quite soft and easily crumbled at
the edges.

7. Remove bottom cover to obtain access to
terminals.

These steps will expose the heating element leads
and insulating bushings in the bottom plate of the
furnace.

8. Cut the element leads between the element
and the terminal block. (There are two
leads.) The element and hearth plate unit
may now be removed by pushing it straight
back out of the furnace. Use care not to
damage the chamber insulation when
removing the hearth plate and element as it
can be reused if it has not been contaminat­ed.

9. Remove the old element lead wire and
power wires from the terminal block, and
save the sleeving for re-installation on the
new element leads. Sleeving must be
replaced if cracked or brittle!

10. New elements are shipped flat to protect
them from damage in shipment, and to save
space in storage. They must be formed
before installation.

11. Place the element on a flat surface with the
rough side up. Place a board or other
straight edge along one row of notches.

12. Gently bend the element along the straight
edge. The refractory cement will break
along the row of notches.

MAINTENANCE AND SERVICING

Note

Nicking or damaging the ele­ment leads will cause prema­ture element failure.

Make the bend 90°, avoiding excessive bend­ing. (The element wires will be exposed at the
corner thus formed. This will not affect its life
or performance.)

13. Bend the other side of the element.

14. Place the hearth plate across the open end of
the ‘’U” shaped element.

15. Slide the element and hearth plate unit into
the chamber, pushing it firmly against the
hearth collar. Use care not to damage the soft
insulation. Remove any crumbs of insulation
that may get between the unit and the hearth
collar.

16. Thread the element leads through the ceram­ic bushings. Bend the leads so they lie close
to the refractory plate and the bottom insula­tion block. (The easiest and safest way to do
this is to press the wire flat with a stick or
blunt pusher. Do not use a sharp object or
nick the wire.)

17. Replace the sleeving and bend the lead 3/4
turn around the terminal screw. Cut off the
excess wire. Replace power wires on top of
element lead wires and tighten screw. Do not
cross the wire over itself around the terminal;
this makes it difficult to keep the connection
tight and prevents good electrical contact. If
you have excess wire, cut it off. Make sure
element lead wires are not touching any other
wires.

18. Replace the back insulation block and back
plate.

19. Examine the thermocouple, and, if it is good,
reinsert it into the chamber. It should extend

MAINTENANCE AND SERVICING

about 1-1/2" into the chamber. Make sure
porcelain insulator is in place for the ther­mocouple to pass through on the steel
back plate. Replace clamp and screw.
(Excessive scaling, pitting, or cracks are
some indications that the thermocouple
may need to be replaced.)

20. Replace bottom cover of control unit.

21. Replace thermocouple cover.

22. If replacement of back insulation is neces­sary, carefully redrill hole for thermocou­ple, using back cover as guide.

23. Reconnect furnace to power supply.

24. Test operation of furnace.

Warning

Disconnect the furnace from the
power supply before servicing.

Note

If the thermocouple touches metal,
this could short out the signal,
causing the control to display room
temperature. This could cause the
furnace temperature to run away,
possibly damaging furnace compo­nents.

To Replace Thermocouple

1. Set furnace on its top.

2. Remove thermocouple cover. (If equipped.)

3. Remove screw and clamp holding the ther­mocouple, then grasp the thermocouple at
the bend where it enters the chamber and
pull it straight back from the furnace. Retain
porcelain insulator.

4. Remove bottom cover.

5. Disconnect the thermocouple from the ter­minal block by removing the screws on the
terminals. Pull the thermocouple through
the hole in the furnace base and discard.

6. Insert the new thermocouple into the back
of the furnace chamber. Make sure the
porcelain insulator extends through the
steel back plate to prevent the lead wires
from touching metal.

MAINTENANCE AND SERVICING

Note

If the control temperature display
moves downward, the thermo­couple leads are reversed.

7. Thread the thermocouple through the hole
in the base which has a nylon insulator,
replace clamp and screw.

8. Bend the thermocouple sharply toward ter­minal block.

9. Secure the two yellow wires marked “+”
together on the terminal block. Secure the
two red wires “-” together on the adjacent
terminal. Make sure connections are secure
to terminal block.

A polarity test of the thermocouple and lead wire is
easily made with the use of a magnet. On chromel
alumel thermocouples and lead wire, the non-mag­netic wire is positive ( + ) and the magnetic wire is
negative ( - ).

Warning

Disconnect furnace from power
supply before servicing.

10. Replace bottom plate.

11. Replace thermocouple cover. (If equipped.)

12. Reconnect furnace to power supply.

13. Test operation of furnace.

To Replace Insulation

1. Remove thermocouple cover. (If equipped.)

2. Set furnace on its top and remove screw
and clamp securing thermocouple, then
grasp thermocouple and remove by pulling
it straight back. Retain porcelain insulator.

3. Remove back plate.

4. Remove bottom cover.

5. Disconnect the element leads from terminal
block.

MAINTENANCE AND SERVICING

Note

Identify or mark wires discon­nected to ensure proper place­ment and connection when rein­stalling.

6. Disconnect thermocouple leads from terminal
block.

7. Remove four nuts holding control section to
furnace chamber.

8. Remove the ground nut.

9. Remove the control section from the furnace

chamber. Remove plates, screws, spacers

and nuts. Be sure to note how plates are
assembled together for reassembly.

10. Remove back piece of insulation by opening
door and pushing it out gently.

11. Remove bottom piece of insulation by lifting it
out.

12. Remove element and hearth plate by pulling
it straight back out of the furnace chamber.

(Be careful not to damage elements.)

13. Remove side insulating pieces.

14. To remove top insulating piece and hearth
collar, position the furnace on its side.
Remove both objects from furnace.

15. Reposition furnace on its top. Reinsert new
hearth collar and the new top piece of insu­lation. Insert the new side pieces of insula­tion last.

16. Reinsert element and hearth plate unit into
the chamber, pushing it firmly against the

hearth collar. (Be careful not to damage
insulation.)

17. Reinsert new bottom piece of insulation over
hearth plate. (Element leads and ceramic
bushings should be exposed above insula-

tion bottom piece.)

MAINTENANCE AND SERVICING

18. Thread the element leads and ceramic
bushings through the bottom plate. Bend
the leads so they lie close to the refractory

plate and the bottom insulation block. (The

easiest and safest way to do this is to press

the wire flat with a stick or blunt pusher. Do

not use a sharp object or nick the wire.)
Secure plate to furnace chamber.

19. Reverse steps 1-9 to reassemble furnace.

To Replace Door Switches

1. Place furnace upside down and remove bot-

tom cover.

2. Disconnect wires from door switches. Identify

or mark wires disconnected from door switch-

es to ensure proper placement and connec­tion when reinstalling.

3. Remove two screws and nuts from door

switches and slide door switches out.

4. Install new door switches to bracket. Place
furnace in an upright position. Adjust door

switches until a click is heard from the

switches, when furnace door is approximate­ly 2" from being completely closed. Secure

door switches to bracket.

5. Place furnace upside down. Reconnect the
wires to new door switches.

6. Replace bottom cover and place furnace

upright.

7. Reconnect furnace to power supply.

8. Test operation of door switches as
described in step 4.

Warning

Disconnect furnace from power
supply before servicing.

MAINTENANCE AND SERVICING

Warning

Disconnect furnace from power
supply before servicing.

Warning

Disconnect furnace from power
supply before servicing.

To Replace Solid State Relay

1. Place furnace upside down and remove the
bottom cover.

2. Disconnect the wires from the solid state
relay. Identify or mark the wires disconnect­ed to ensure proper placement and connec­tion when re-installing.

3. Remove solid state relay from bottom cover.
Note placement of solid state relay.

4. Install new solid state relay and reconnect
wires.

5. Replace bottom cover and place furnace
upright.

6. Reconnect furnace to power supply.

To Replace Controller

1. Place furnace upside down and remove
bottom cover.

2. Disconnect wires from the controller.
Identify or mark wires disconnected to
ensure proper placement and connection
when re-installing.

3. Remove the controller from bottom cover.

4. Install new controller and secure.

5. Reconnect wires identified in step 3 to new
controller.

6. Replace bottom cover and place furnace
upright.

7. Reconnect furnace to power supply.

Wiring Diagrams

FB 1400 models

FB1300 models

EXPLODED VIEW

EXPLODED VIEW

29

Quantity

Key# Description Required Part Number

1 Heating element (100V - FB1314M) 1 EL140X2
1 Heating element (120V - FB1315M) 1 EL44X1
1 Heating element (208V - FB1318M) 1 EL44X3
1 Heating element (240V - FB1310M, -33) 1 EL44X2
1 Heating element (100V - FB1414M) 1 EL186X2
1 Heating element (120V - FB1415M) 1 EL48X1
1 Heating element (208V - FB1418M) 1 EL48X3
1 Heating element (208V - FB1410M, -33) 1 EL48X2
2 Thermocouple (FB1300 models) 1 TC1256X1
2 Thermocouple (FB1400 models) 1 TC746X1A
3 Solid State Relay (all models) 1 RYX34
4 Door Switches (all models) 2 SWX163
5 Control (FB1300M & FB1400M models except FB1410M-33) 1 CN71X81
5 Control (FB1400M-33 model only) 1 CN71X101
6 Insulation Btm (all FB1300 models) 1 JC44X1
6 Insulation Btm (all FB1400 models) 1 JC48X2
7 Insulation Back (all FB1300 models) 1 JC44X4
7 Insulation Back (all FB1400 models) 1 JC48X1
8 Insulation Top (all FB1300) 1 JC44X3
8 Insulation Top (all FB1400) 1 JC48X3
9 Insulation Hearth Collar (FB1300) 1 HC44X1

9 Insulation Hearth Collar (FB1400) 1 HC48X1
10 Insulation Sides (FB1300) 2 JC460X2
10 Insulation Sides (FB1400) 2 JC48X4
11 Cycle Light (amber) (all 100V & 120V) 1 PLX76
11 Cycle Light (amber) (all 208V & 240V) 1 PLX82
12 Terminal Block 1 TRX136
13 Terminal Block 1 TRX96
14 Power Switch (100 & 120V models) 1 SWX143
14 Power Switch (208 & 240V models) 1 SWX144
15 Door Assembly (FB1300 all models) 1 DR347X1A
15 Door Assembly (FB1400 all models) 1 DR348X1A
16 Element Sleeving (all models) 1 SL745X1
17 Element Sleeving (all FB1300 models) 1 SL59X2
18 Hearth Plate (all FB1300 models) 1 PH44X1
18 Hearth Plate (all FB1400 models) 1 PH48X1
19 Filter (all -33 models) 1 CAX98
20 Fuse Holder (all models) 1 FZX26
21 Fuse 10 amp .25 x 1.25 - (Buss™ Type ABC, 2 FZX30

240V & 208V models)

21 Fuse 15 amp .25 x 1.25 (Buss™ Type ABC, 2 2-58147

120V models)

21 Fuse 20 amp .25 x 1.25 (Buss™ Type ABC, 2 FZX29

100V models)
22 Dial Plate Label (FB1300) 1 DLX248
22 Dial Plate Label (FB1400) 1 DLX249

Replacement Parts List

One Year Limited Warranty

BARNSTEAD|THERMOLYNE CORPORATION (“BARNSTEAD”) warrants that if a product manufactured by
Barnstead shall be free of defects in materials and workmanship for one (1) year from the first to occur of (i)
the date the product is sold by BARNSTEAD or (ii) the date the product is purchased by the original retail cus­tomer (the “Commencement Date”). Except as expressly stated above, BARNSTEAD MAKES NO OTHER
WARRANTY, EXPRESSED OR IMPLIED, WITH RESPECT TO THE PRODUCTS AND EXPRESSLY DIS­CLAIMS ANYAND ALL WARRANTIES, INCLUDING BUT NOT LIMITED TO, WARRANTIES OF DESIGN,
MERCHANT ABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

An authorized representative of BARNSTEAD must perform all warranty inspections. In the event of a defect
covered by BARNSTEAD’s warranty, BARNSTEAD shall, as its sole obligation and exclusive remedy, provide
free replacement parts to remedy the defective product. In addition, for products sold by BARNSTEAD within
the continental United States or Canada, BARNSTEAD shall provide provide free labor to repair the products
with the replacement parts, but only for a period of ninety (90) days from the Commencement Date.

BARNSTEAD’s warranty provided hereunder shall be null and void and without further force or effect if there
is any (i) repair made to the product by a party other than BARNSTEAD or its duly authorized service repre­sentative, (ii) misuse (including use inconsistent with written operating instructions for the product), mishan­dling, contamination, overheating, modification or alteration of the product by any customer or third party or
(iii) use of replacement parts that are obtained from a party who is not an authorized dealer of BARNSTEAD.

Heating elements, because of their susceptibility to overheating and contamination, must be returned to the
BARNSTEAD factory and if, upon inspection, it is concluded that failure is due to factors other than excessive
high temperature or contamination, BARNSTEAD will provide warranty replacement. As a condition to the
return of any product, or any constituent part thereof, to BARNSTEAD’s factory, it shall be sent prepaid and a
prior written authorization from BARNSTEAD assigning a Return Goods Number to the product or part shall
be obtained.

IN NO EVENT SHALL BARNSTEAD BE LIABLE TO ANY PARTY FOR ANY DIRECT, INDIRECT, SPECIAL,
INCIDENTAL, OR CONSEQUENTIAL DAMAGES, OR FOR ANY DAMAGES RESULTING FROM LOSS OF
USE OR PROFITS, ANTICIPATED OR OTHERWISE, ARISING OUT OF OR IN CONNECTION WITH THE
SALE, USE OR PERFORMANCE OF ANY PRODUCTS, WHETHER SUCH CLAIM IS BASED ON CON­TRACT, TORT (INCLUDING NEGLIGENCE), ANY THEORY OF STRICT LIABILITY OR REGULATORY
ACTION.