Thermo Scientific BF51731 Quick start guide

November, 2020
Models: BF51731 and BF51732 (C/BC)
Installation and Operational Manual
304257H02 Rev. A
Thermo Fisher Scientific
Lindberg/Blue M LGO 1200°C Box Furnace

©2020 Thermo Fisher Scientific Inc. All rights reserved.
Thermo Fisher Scientific Inc. provides this document to its customers with a product purchase to use in the product
operation. This document is copyright protected and any reproduction of the whole or any part of this document is strictly
prohibited, except with the written authorization of Thermo Fisher Scientific Inc.
The contents of this document are subject to change without notice. All technical information in this document is for
reference purposes only. System configurations and specifications in this document supersede all previous information
received by the purchaser.
Thermo Fisher Scientific Inc. makes no representations that this document is complete, accurate or error-free and
assumes no responsibility and will not be liable for any errors, omissions, damage or loss that might result from any use
of this document, even if the information in the document is followed properly.
This document is not part of any sales contract between Thermo Fisher Scientific Inc. and a purchaser. This document
shall in no way govern or modify any Terms and Conditions of Sale, which Terms and Conditions of Sale shall govern all
conflicting information between the two documents.

1200°C Box Furnace 304257H02 | 1
Table of Contents
Table of Contents
Chapter 1 Safety Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
Explanation of Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Standards and Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
Electromagnetic Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
Chapter 2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-11
Features and Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Intended Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
Non-Intended Use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Chapter 3 Pre-Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-15
Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-15
Environmental Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-16
Atmosphere Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16
Chapter 4 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-17
Lifting and Carrying . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-17
Transport . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17
Location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-17
Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17
Mains Electrical/Thermocouple Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18
Exhaust Vent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19
Exhaust Port Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-19
Atmosphere Inlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-20
Atmosphere Inlet Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21
Hearth Plate and Shelves Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-21
Chapter 5 Start-Up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-23
Initial Furnace Start-Up/Drying-Out Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-23
Door Seal Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-24
Door Seal Adjustment (if necessary). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-24
Chapter 6 1x8 segment and 5x16 Segment Programmable Models w/OTP . . . . . . . . . . . . . . . . . . . . . . . . . 6-25
Eurotherm 3216 Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-25
Operator Interface & HOME Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-26
Beacon Display and Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-26
Operator Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-27
Single Set Point Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-27
Alternate Set Point Selection (SP2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-28
Set Point Ramp Rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-28
View or Change the Display Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-29
Auto Tuning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-30
Parameter List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-31
Offset Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-33
Alarms & Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-34
Sensor Break & Loop Break Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-35
Over – Temperature Protection (OTP). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-35
1-Program 8-Segment Controller Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-38

Table of Contents
2 | 304257H02 1200°C Box Furnace
Soft Start Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-40
Delayed Switch On Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-41
5-Program 16-Segment Controller Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-45
Chapter 7 Operation - 3216i Excess Temperature Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-51
Excess Temperature controller Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-52
Operational Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-52
Chapter 8 Communication Option. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-57
Adapters - RS 485 to RS 232/USB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-57
RS 485 Pinout & Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-57
Host Computer & Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-58
Controller Parameters for Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-58
Chapter 9 Maintenance & Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-59
General Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-59
Cleaning and Decontamination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-59
Heating Elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-60
Heating Unit Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-60
Thermocouple (T/C) Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-61
Solid State Relay (SSR) Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-61
Door Insulation Replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-62
Chapter 10 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-63
Chapter 11 Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-65
Chapter 12 Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-67
Chapter 13 End of Life Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13-69
WEEE Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-70
Chapter 14 Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-71

1200°C Box Furnace 304257H02 | 3
Figures
Figures
Figure 1 1200°C Box Furnace ................................................................................................................. 2-11
Figure 2 Thermocouple............................................................................................................................ 4-18
Figure 3 Exhaust Vents ............................................................................................................................ 4-19
Figure 4 Preventing Chimney Effect .......................................................................................................... 4-20
Figure 5 Gas Inlet Tube Assembly ............................................................................................................ 4-21
Figure 6 Thermocouple............................................................................................................................ 9-61
Figure 7 Controller Electrical Panel ........................................................................................................... 9-62
Figure 8 Wiring Diagram (BF51731, BF51732) ....................................................................................... 12-67

Figures
4 | 304257H02 1200°C Box Furnace

1200°C Box Furnace 304257H02 | 1-5
Safety Notes
Explanation of Symbols
This symbol when used alone indicates important operating instructions which reduce the
risk of injury or poor performance of the unit.
DANGER : Indicates a hazardous situation which, if not avoided, will result in death
or serious injuries.
WARNING : Indicates a hazardous situation which, if not avoided, could result in
death or serious injuries.
CAUTION : Indicates a situation which, if not avoided, could result in damage to
equipment or property.
Before installing, using or maintaining this product, please be sure to read the manual
and product warning labels carefully. Failure to follow these instructions may cause the
product to malfunction, which could result in injury or damage
This symbol indicates possible pinch points which may cause personal injury.
This symbol indicates surfaces which may become hot during use and may cause a burn
if touched with unprotected body parts.
WARNING : This symbol indicates situations where dangerous voltages exist and
potential for electrical shock is present.
This symbol indicates a need to use gloves during the indicated procedures.
If performing decontamination procedures, use chemically resistant gloves.
Use gloves during the daily usage.
WARNING : This symbol indicates a situation which fire hazards exits in the Product.
WARNING : Unauthorized repair of your Furnace will invalidate your warranty.
Contact Technical Service at 1-800-438-4851 for additional information.

| Safety Notes
Chapter 1
1-6 | 304257H02 1200°C Box Furnace
This symbol indicates power is ON.
This symbol indicates power is OFF.
This symbol indicates Alternating current.
This symbol indicates Earth ground power.
This symbol indicates Protective conductor terminal.

1200°C Box Furnace 304257H02 | 1-7
Safety Notes | Chapter 1
Safety Considerations
May be irritating to skin, eyes, and respiratory tract.
May be harmful if inhaled.
May contain or form cristobalite (crystalline silica) with use at high temperature
(above 871°C (1599.8°F)) which can cause severe respiratory disease.
Possible cancer hazard based on tests with laboratory animals. Animal studies to
date are inconclusive. No human exposure studies with this product have been
reported.
DANGER :
Do not modify or use equipment in a manner other than expressly intended.
Modification of equipment other than that for which it is explicitly designed could cause
severe injury or death. Any customer after-market retrofit violates the warranty of the
equipment.
Do not modify or disconnect any safety features provided. Disconnection of the unit
safety features could allow the unit to become overheated and start on fire, causing
personal injury or death, product and property damage.
Do not use components or materials not specifically designed for this equipment.
Failure to comply with this precaution could result in damage to equipment used or the
furnace and may create an overheat situation. Also, do not use anything other than
OEM exact replacement equipment and parts. Not using OEM replacement parts could
cause faulty instrumentation readings, inoperable equipment, or temperature
overshoot. Both situations may cause personal injury or death, product, and property
damage.
Before using, user shall determine the suitability and integrity of the product for the
intended use and that the unit has not been altered in any way. Misapplication may
compromise the safety of the end user or the life of the product.
WARNING : Use appropriate Personal Protective Equipment (PPE) per local
protocols.
CAUTION : This product contains refractory ceramic fiber or other refractories which
can result in the following:
WARNING : This product can expose you to chemicals including arsenic, which is
known to the state of California to cause cancer. For more information go to
www.P65Warnings.ca.gov.
WARNING : Before maintaining this equipment, read the applicable Safety Data
Sheets (SDS). SDS is provided with unit.

| Safety Notes
Chapter 1
1-8 | 304257H02 1200°C Box Furnace
WARNING : When installing, maintaining, or removing the insulation, the following
precautions will minimize airborne dust and fiber:
Keep personnel not involved in the installation out of the area.
Use a good vacuum to clean area and equipment. Use a dust suppressant if
sweeping is necessary. Do not use compressed air.
Use a disposable mask suitable for nuisance dust.
Wear long sleeve clothing, gloves, hat, and eye protection to minimize skin and
eye contact. Do not wear contact lenses.
Thoroughly wash self after work is complete.
Launder work clothing separate from other clothes and thoroughly clean
laundering equipment after use. If clothing contains a large amount of dust and/or
fiber, dispose of rather than clean.
Promptly place used ceramic fiber parts and dust in plastic bags and dispose of
properly.

1200°C Box Furnace 304257H02 | 1-9
Safety Notes | Chapter 1
Standards and Directives
The box furnaces complies with the following standards and guidelines:
European Union
The European voltage models of this product meet all the applicable
requirements of the European Directives and therefore display the CE
Marking. The most current EU Declaration of Conformity may be obtained
from the manufacturer.
Product Safety
This product family has been tested to applicable product standards by UL a
Nationally Recognized Test Laboratory (NRTL).
Electromagnetic Compatibility
FCC Statement (USA)
Any changes or modifications not expressly approved by the party
responsible for compliance could void the user’s authority to operate the
equipment.
NOTE: This equipment has been tested and found to comply with the limits for a Class A
digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the instruction manual,
may cause harmful interference to radio communications. Operation of this equipment in
a residential area is likely to cause harmful interference in which case the user will be
required to correct the interference at his own expense.
Canadian ISED IC Notice
This ISM digital apparatus complies with Canadian ICES-001.
Cet appareil ISM est conforme á la norme NMB-001 du Canada.
South Korean EMC Statement
사용자안내문이기기는업무용환경에서사용할목적으로적합
성평가를받은기기로 서가정용환경에서사용하는경우전파
간섭의우려가있습니다 .
EMC Registration is done on this equipment for business use only. It may
cause interference when the product would be used in home.

| Safety Notes
Chapter 1
1-10 | 304257H02 1200°C Box Furnace
Evaluation of Chemicals - Regulations and
Directives
Proposition 65 - California
REACH - Europe
Thermo Fisher Scientific are committed to meeting all compliance obligations to evaluate,
communicate, and register any Substances of Very High Concern (SVHC), and finding
alternates where appropriate.
RoHS - Europe
Thermo Fisher Scientific are determined to reduce the impact on the environment, and so
can declare that this product fully complies with the European Parliament’s RoHS2
(Restriction of Hazardous Substances) Directive 2011/65/EU, with respect to all the
following substances:
Lead (0.1%)
Mercury (0.1%)
Cadmium (0.01%)
Hexavalent chromium (0.1%)
Polybrominated biphenyls (PBB) (0.1%)
Polybrominated diphenyl ethers (PBDE) (0.1%)
Our compliance is witnessed by written declaration from our suppliers and/or component
testing. This confirms that any potential trace contamination levels of the substances
listed above are below the maximum level set by the latest regulations or are exempt due
to their application.
RoHS – China
This product complies with the requirements of the legislative act Administration on the
Control of Pollution Caused by Electronic Information Products (ACPEIP). The following
label of conformance, may be found on the product:
WARNING : Cancer and Reproductive Harm - www.P65Warnings.ca.gov

1200°C Box Furnace 304257H02 | 2-11
Introduction
Figure 1 1200°C Box Furnace
The Thermo Fisher Scientific BF51731, BF51732 is a reliable, energy efficient 1200°C
laboratory box furnace. The heating elements and low thermal mass Moldatherm®
insulation provide fast duty cycles, energy conservation, and efficient programming.
Refer to Table 1 “BF51731, BF51732 Laboratory Box Furnaces” for specifications.
Features and Benefits
Controlled heat-up rate eliminates thermal shock to materials.
Quick heat-up and cool-down rates.
Vertical lift door:
Functions as shield to keep the hot face away from the user.
Optimizes the use of bench space.
Provides smooth, spring - loaded operation.
Safety interlock switch automatically interrupts power to heating elements when door
is opened. This feature protects heating elements and eliminates operator's exposure
to electrical shock.
Energy efficient Moldatherm insulation suitable for high interior-exterior temperature
differential. The unit is rated for a maximum operating temperature of 1200°C.
Patented LGO (light gauge overbend) heating elements transfer radiant heat energy
to the work chamber and load efficiently and economically.
Replaceable hearth plates and shelves.
Digital control with adjustable parameters.

| Introduction
2-12 | 304257H02 1200°C Box Furnace
Chapter 2
Main power ON/OFF switch and power indicator on control panel.
Double wall construction.
Front control panel is recessed at the top. This feature provides easy viewing of the
control LED and protection for the control instrumentation.
Intended Use
This furnace is intended as a general purpose laboratory, ashing, and heat treating
furnace at 1200°C for continuous (over 3 hours) or intermittent (under 3 hours) use. For
industrial, laboratory, and commercial applications only. The furnace is designed for
thermal technology applications in laboratories, such as those found in manufacturing
trades and industry, schools, universities and biology. It is used for ageing, analysis,
tempering, decomposing, baking, annealing, hardening, soldering, oxidizing, reducing,
incineration and preheating.
Non-Intended Use
This furnace is not intended for the following:
To heat up food.
For drying or heat treatment of substances which release gases or vapors into the
atmosphere that are flammable or dangerously explosive when mixed with air.
This furnace is equally unsuitable for the heat treatment of combustible dusts and
fibrous materials.

1200°C Box Furnace 304257H02 | 2-13
Introduction | Chapter 2
Specifications
Table 1 BF51731, BF51732 Laboratory Box Furnaces
*COM = Unit includes male and female RS 485 Digital Communications DB-9 ports.
Model BF51731C-1
BF51731COMC-1* BF51731BC-1 BF51732C-1 BF51732COMC-1*
BF51732BC-1
BF51732BCOMC-1*
Capacity 16.4 L
(0.6 cu. ft.)
16.4 L
(0.6 cu. ft.)
16.4 L
(0.6 cu. ft.)
16.4 L
(0.6 cu. ft.)
Temp. Range 1200°C 1200°C 1200°C 1200°C
Interior
(D x W x H)
11 x 12 x 11 in
(27.9 x 33.0 x 17.8 cm)
11 x 12 x 11 in
(27.9 x 33.0 x 17.8 cm)
11 x 12 x 11 in
(27.9 x 33.0 x 17.8 cm)
11 x 12 x 11 in
(27.9 x 33.0 x 17.8 cm)
Exterior
(L x W x H)
23 x 24 x 27 in
(58.4 x 61 x 68.6 cm)
23 x 24 x 27 in
(58.4 x 61 x 68.6 cm)
23 x 24 x 27 in
(58.4 x 61 x 68.6 cm)
23 x 24 x 27 in
(58.4 x 61 x 68.6 cm)
Control 3216c 3216c, 3216i 3216p 3216p, 3216i
Electrical 208/240 VAC,
50/60 Hz,
4500 W
16-19 A
208/240 VAC,
50/60 Hz,
4500 W
16-19 A
208/240 VAC,
50/60 Hz,
4500 W
16-19 A
208/240 VAC,
50/60 Hz,
4500 W
16-19 A
Shipping Weight 165 lbs
75 kg
165 lbs
75 kg
165 lbs
75 kg
165 lbs
75 kg
3216c = 1/16 DIN, 1 program 8 segment digital dual display controller.
3216p = 1/16 DIN, 5 program 16 segment digital dual display controller.
3216i = 1/16 DIN, Excess Temperature Controller.

| Introduction
2-14 | 304257H02 1200°C Box Furnace
Chapter 2

1200°C Box Furnace 304257H02 | 3-15
Pre-Installation
Unpacking
Carefully unpack and inspect the unit and all accessories for damage, if you find any
damage, keep the packing materials and immediately report the damage to the carrier.
We will assist you with your claim, if requested. Do not return goods to Thermo Fisher
Scientific without written authorization. When submitting a claim for shipping damage,
request that the carrier inspect the shipping container and equipment.
Inside the furnace cabinet is a bag containing:
Hearth Plate
Gas Inlet Tube Assembly
Exhaust Port Cover
Shelves (Qty 2)
User Manual, SDS, User Information Instructions*
Operating Conditions
High concentrations of sulfates, chlorides, fluorides, alkalis, and V2O5can have corrosive
effects on the ceramic fiber. Contact Thermo Fisher Scientific for additional information
about the effects of specific atmospheres on furnace performance.
With prolonged use, hairline cracks can develop in the insulation materials. These minor
cracks will not affect the furnace's performance. Recommend turning off the furnace
completely when not in use. The heating unit is not damaged by rapid heating and cooling
cycles.
*NOTE May be contained on optional USB thumb drive.

| Pre-Installation
3-16 | 304257H02 1200°C Box Furnace
Chapter 3
Environmental Conditions
Atmosphere Systems
The 1200°C box furnace series are not designed for use with combustible or inert
atmospheres requiring an air tight chamber. If an exhaust port is used, the furnace should
not be located in an enclosed area without proper ventilation.
Indoor Use Only.
Class of Equipment Class I
Mains Supply
Fluctuations
Mains supply voltage fluctuations not to exceed ±10% of
the nominal voltage.
Operating The recommended ambient temperature is 17°C to 27°C
(62.6°F to 80.6°F); 20% to 80% relative humidity,
non-condensing.
Installation Category II (over-voltage) in accordance with IEC
664. Pollution degree 2 in accordance with IEC 664. Do not
exceed ambient temperature of 40°C (104°F).
Altitude Limit 2,000 meters (6561.68 feet).
Storage -25°C (-13°F) to 65°C (149°F); 20% to 80% relative
humidity.
WARNING : Do not use combustible gases directly in this furnace. Process gases
must always be contained in a separate tube.
CAUTION : Avoid combustible products which generate toxic or hazardous vapor or
fumes. Work should only be done in a properly vented environment.

1200°C Box Furnace 304257H02 | 4-17
Installation
Lifting and Carrying
Transport
1. For transport, do not lift the device using the doors or components attached to the
device (e.g. control box on rear panel) as lift points.
2. Lift at the bottom sides of the furnace with NIOSH rated straps and/or using
appropriate number of personnel per local safety policies and regulations.
Location
Install the furnace in a level area free from vibration. To permit proper air flow, leave at
least 3" (7.62 cm) of space on all sides of the unit and 12" (30.48 cm) above the unit.
Wiring
Thermo Fisher Scientific model furnaces are designed for operation on 208-240 VAC.
The furnaces will operate on 208 volts, but will have reduced heat up rates.
1. Suitable lengths of properly sized wires must be acquired prior to the installation of
your furnace will draw approximately 19 amps on 240 VAC. Minimum recommended
wire gauge size is 12WG. A high temperature (150°C) wire casing is also
recommended. A ground wire should be provided per local code.
2. Remove the right panel (side with High Voltage label) of the furnace by removing the
appropriate four screws. Removing the side panel allows for access to the terminal
block and grounding screws, located at the base of the unit.
CAUTION : Be sure ambient temperature does not exceed 40°C (104°F). Ambient
above this level may result in damage to the controller. The recommended ambient
temperature is 17°C to 27°C (62.6°F to 80.6°F).
CAUTION : Allow at least 3" (7.62 cm) of space between the furnace, at least
12" (30.48 cm) above the furnace and any combustible surface. This permits the heat
from the furnace case to escape so as not to create a possible fire hazard.
WARNING : To avoid electrical shock, this furnace must be installed by a competent
electrician who ensures compatibility among furnace specification, power source and
ground code requirements.
CAUTION : Heavy loads. Lift with care!
1. To avoid injury through physical strain, such as strain trauma and slipped discs, do
not attempt to lift the furnace alone.
2. To avoid injury through dropped loads, wear Personal Protective Equipment (PPE)
per local protocols, such as safety shoes, when lifting the furnace.
3. To avoid crushing your fingers or hands (particularly in a closing door) or damaging
the furnace, do not use any other lift points than the bottom sides of the furnace.

| Installation
4-18 | 304257H02 1200°C Box Furnace
Chapter 4
Furnace installation requires L1, L2, and ground wire (not provided).
3. Thread two properly sized power wires and one properly sized ground wire through
the conduit hole. The wires should be marked L1, L2, and ground. Insert power leads
L1 and L2 into terminal block and tighten down securely. Ground on the provide
ground screw.
4. Check that all electrical connections are secure.
5. Place the Side Panel on the furnace and secure with the screws.
Mains Electrical/Thermocouple Check
Before initial start up, inspect the furnace's wiring connections:
1. Remove the two screws on the small panel at the back of furnace and detach.
2. Check that the thermocouple is securely mounted and undamaged.
3. Check the thermocouple wiring connections. Refer to Figure 2 “Thermocouple”. Red
is always negative.
4. Check that all electrical connections are secure. Visually check that the door properly
activates the power interrupt switch near the front of the furnace.
Figure 2 Thermocouple
NOTE For Europe, L2 connection at furnace is wired to Neutral.
NOTE Electrical installation must be performed by a qualified electrician.
Consult local electrical codes for proper sizing of power and control wiring.
Wire Label
Line 1 L1
Line 2 L2
Ground GND
NOTE Unit supplied with 7/8" Hole covered with a bushing that is sized for 1/2"
Conduit / connections per electrical standards. Utilize strain reliefs as needed.
CAUTION : Failure to check thermocouple wiring connections before Initial start up
could result in damage to the furnace.