Thermo Scientific 1700 Manuel utilisateur

Type 1700 Furnace

OPERATION MANUAL

AND PARTS LIST

Series 85 Gray

Model Numbers

FA1730 & FA1730-1 240 volt FA1740 & FA1740-1

FA1736 & FA1736-1 480 volt FA1746 & FA1746-1

FA1738 & FA1738-1 208 volt FA1748 & FA1748-1

LT85X8 • 5/27/08

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.

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

Alert Signals..................................................................................................................................................3

Warnings ......................................................................................................................................................3

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

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

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

Unpacking ..........................................................................................................................................................6

Installation ..........................................................................................................................................................7

Site Selection................................................................................................................................................7

Operation ............................................................................................................................................................8

Door Safety Switch ......................................................................................................................................8

Furnace Loading ................................................................................................................................................9

Maintenance & Servicing ..................................................................................................................................10

Warning ......................................................................................................................................................10

Preventive Maintenance ............................................................................................................................10

To Replace Heating Element ......................................................................................................................11

To Replace Thermocouple ........................................................................................................................12

To Replace Door Switch ............................................................................................................................13

Troubleshooting ................................................................................................................................................14

Ordering Procedures ........................................................................................................................................16

Replacement Parts List ....................................................................................................................................17

Wiring Diagrams................................................................................................................................................18

One Year Limited Warranty ..............................................................................................................................20

Table of Contents

Your Thermo Scientific Thermolyne Type 1700 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

o avoid electrical shock, this furnace must:

1. Be installed by a competent, qualified electrician

who ensures compatibility among furnace speci-

fications, power source and grounding code

requirements.

2. Be disconnected from the power supply prior to

maintenance and servicing.

3. Have the door switch operating properly.

o 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 materials.

2. “Caution: Hot Surface. Avoid Contact.” To avoid

burns, do not this furnace on the exterior or inte-

rior surfaces during use or for a period of time

after use.

3. Refer servicing to qualified personnel.

Please note the following WARNINGS:

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 Internation-

al Agency for Research on Cancer (IARC) has classified

refractory ceramic fiber and fiberglass as possibly

Safety Information

Caution

Cautions alert you to a possibility of

damage to the equipment.

Warning

Warnings alert you to a possibility of

personal injury.

Note

Notes alert you to pertinent facts and

conditions.

Alert Signals

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 refracto-

ry ceramic products, please contact the Customer Service

Department at 1-800-553-0039.

SAFE Y INFORMA ION

Figure 1: 1700 Furnace

Intended Use

The Type 1700 furnace is a large capacity furnace used

for both general laboratory procedures and as a heat

treating furnace. Standard models are intended for appli-

cations requiring temperatures from 300°F (150°C) to

1800°F (982°C) for continuous use, or temperatures from

1800°F (982°C) to 2000°F (1093°C) for intermittent use.

High temperature (-1) models are intended for applica-

tions requiring temperatures from 300°F (150°C) to

1950°F (1066°C) for continuous use, or temperatures

from 1950°F (1066°C) to 2150°F (1177°C) for intermittent

use. Continuous use is operating the furnace for more

than 3 hours and intermittent use is operating the furnace

for less than 3 hours.

The unit consists of 1) a heating chamber, and 2) a two-

section counter-weighted door. See Figure 1 for the over-

all shape and general features of the furnace.

Principles of Operation

The furnace chamber is heated by four electric resistance

heaters which are embedded in a special refractory

cement. The chamber is insulated with firebrick and

ceramic fiber insulation. The furnace incorporates a two-

section counter-weighted door to aid inspection and

reduce heat loss of furnace chamber. For safety, a door

switch is added to remove power from heating elements

when the door is opened.

Introduction

Unpack furnace from box. The door counterweight is

included in the box as well as three (3) PHX2 hearth

plates. After unpacking the furnace, attach the door han-

dle, tighten set screw and remove packing material from

inside furnace chamber. THE TYPE 1700 FURNACES

DO NOT COME WITH A POWER CORD BECAUSE

CURRENT REQUIREMENTS ARE TOO GREAT TO BE

HANDLED BY ORDINARY POWER CORDS AND STAN-

DARD WALL SUPPLY.

Unpacking

Site Selection

Install furnace on a sturdy surface and allow space for

ventilation.

The electrical specifications are located on the specifica-

tion plate on the side of the furnace. Consult Customer

Service if your electrical service is different than those

listed on the specification plate.

Your 1700 Furnace may be wired either directly through a

conduit system or by a flexible cable system which con-

forms to the National Electrical Codes and electrical code

requirements of your area. The terminals to be wired are

located on the middle rear of the furnace under the termi-

nal cover. See Wiring Diagrams for wiring locations.

Installation

Caution

Space unit six inches from com-

bustible walls under any condition.

This permits the heat from 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,

qualified electrician who ensures com-

patibility among furnace specifications,

power source and grounding code

requirements.

Caution

For supply connections, use 10 AWG

or larger wires suitable for at least

200°C.

Door Safety Switch

The door safety switch removes power from the heating

elements when the door is opened. Test door switch to

ensure proper operation. If the door switch is not working

properly, consult the Troubleshooting section before pro-

ceeding. Power is restored to heating elements when the

door is closed.

The element wire on high temperature models (-1) is pro-

tected at high temperatures by the formation of an alu-

minum oxide on the surface of the heating element. This

oxide layer gives the heating element its strength at high

temperatures and prevents contamination from outside

sources. Formation of the aluminum oxide takes approxi-

mately 8-10 hours of operating at a temperature of at

least 1800°F (982°C). Formation of the oxide is relatively

critical to the overall life of the heating unit. Any sub-

stance coming in contact with the heating element and

preventing formation of the oxide will cause premature

failure.

Operation

Caution

Disconnect from power supply if tem-

perature exceeds 2000°F for standard

models or 2150°F for hi-temperature

models (-1).

Note

For correct operation consult the oper-

ating instructions for the automatic

temperature controller which is intend-

ed to be used on this furnace.

Warning

“Caution: Hot Surface. Avoid Contact.”

To avoid burns, do not this furnace on

the exterior or interior surfaces during

use or for a period of time after use.

Warning

To avoid electrical shock, this furnace

must have the door switch operating

properly.

For best results of furnace loading, use less than two-

thirds of any dimension of the chamber. Place load on

hearth plate (PHX2) if not using shelf (PH42X1). Maintain

3/4” - 1” clearance between load and side heating ele-

ments.

• If you are heating a number of small parts,

spread them throughout the middle two-thirds of

the chamber.

• Keep objects away from thermocouple.

• Block up load with small pieces of ceramic, use

hearth plate or shelf. Refer to Replacement

Parts list.

• Use insulated tongs and mittens when loading

and unloading furnace.

• Always wear safety glasses.

Furnace Loading

Caution

Do not overload your furnace cham-

ber. If the load is to be heated uniform-

ly, it should not occupy more than two-

thirds of any dimension of the cham-

ber. Failure to observe this caution

could result in damage to furnace

components.

Warning

Please note the following WARNINGS:

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 Internation-

al 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 refracto-

ry ceramic products, please contact the Customer Service

Department at 1-800-553-0039.

Preventive Maintenance

• Contamination is a major cause of element fail-

ure, therefore, when possible, remove the fume

forming material before heating. (e.g., cleaning

cutting oil from tool steel.)

Maintenance and Servicing

Warning

To avoid electrical shock, this furnace

must be disconnected from the power

supply prior to maintenance and serv-

icing.

Note

Perform only maintenance described

in this manual. Contact an authorized

dealer or our factory for parts and

assistance.

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