Thermo Scientific 1700 User manual

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
2
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
3
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.
4
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.
5
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.
6
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.
7
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.
8
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.
9
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.)
10
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.

• Housekeeping is vital to your electrical fur-
nace—KEEP IT CLEAN! Run your furnace up to
1600°F empty occasionally for 3-4 hours to burn
off the contamination that may exist on the insu-
lation and elements.
• 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 500°F (260°C).
To Replace Heating Element
a. Disconnect furnace from power supply.
b. Remove back terminal cover.
c. Loosen the nut on the terminals of the element
to be replaced. (Note placement and connection
of wires.) Corroded hardware should be
replaced to ensure proper electrical connec-
tions.
d. Straighten the leads of the old element.
e. Open the door and pull the defective element
out.
f. Slide the new element into place, threading the
leads through the insulating bushing in the back
of the furnace.
9. Bend the elements across the “U” shaped termi-
nal clamp washer. Replace the adjacent element
lead across the washer. Put the terminal clamp
washer over the element leads and tighten the
nut securely. Cut off any excess lead wire. (See
Figure 2.) Use rounded nose pliers to bend the
new wires in place. Never nick or gouge the ele-
ment wire!
h. Replace the back terminal cover.
i. Reconnect furnace to power supply.
11
MAIN ENANCE AND SERVICING
Note
o avoid damaging good elements:
High temperature element wire
becomes very brittle after being heat-
ed (-1 models). Heating the wires with
a soldering iron or small torch will soft-
en the wire. The straighten the ele-
ment leads with a rounded nose pliers.
Never nick or gouge the element wire!

To Replace Thermocouple
(Type F) Platinell II - Supplied
with Thermolyne Controllers
a. Disconnect furnace from power supply.
b. Remove the back terminal cover of the furnace
with four screws. (Note placement and connec-
tion of wires.)
c. Loosen the screws holding thermocouple to ter-
minal block and pull out the old thermocouple
from the porcelain insert.
d. Insert the new thermocouple into the porcelain
insert.
e. Insert the thermocouple lead tagged (colored
bead on the lead) positive (+) into the terminal
on the block marked positive(+).
f. Insert the remaining thermocouple lead into the
terminal on the block marked negative ( - ).
Tighten set screws securely.
g. Replace back terminal cover.
h. Reconnect furnace to power supply.
To Replace Door Switch
a. Disconnect furnace from power supply.
b. Remove the door counterweight by removing set
screw and pulling.
c. Remove the four screws from door switch cover
and slide cover off.
d. Remove the two screws from door switch and
desolder its two wires.
e. Insert new door switch and secure.
12
MAIN ENANCE AND SERVICING
Caution
Thermocouple must be matched with
the controller! Temperature run-away
may occur if the incorrect thermocou-
ple is used. Contact Customer Service
with model number and serial number
of the furnace and controller to ensure
the proper thermocouple is obtained.
Note
If insulation needs to be replaced,
contact Customer Service.

f. Resolder wires to new door switch.
g. Replace cover.
h. Replace door counterweight.
i. Reconnect furnace to power supply.
13
MAIN ENANCE AND SERVICING

The Trouble Shooting Tips section is intended to aid in defining and correcting possible service problems.
When using the chart, select the problem category that resembles the malfunction, then proceed to the possi-
ble causes category and take necessary corrective action.
PROBLEM POSSIBLE CAUSES CORREC IVE AC ION
The power light does not The furnace is not connected to Check furnace connections to power
illuminate. power supply. source.
Controller malfunction. See troubleshooting section in
controller instructions.
Furnace door is not Close furnace door.
fully closed.
Door switch malfunction. Realign or replace door switch.
The furnace does not heat. No power. Check power source and fuse.
Defective electrical hook-up.
Repair electrical hook-up.
Controller malfunction. See troubleshooting section in
controller instructions.
Door switch malfunction. Realign or replace door switch.
One or more heating elements in Replace burned out elements.
480V furnace are burned out.
Two or more heating elements in Replace burned out elements.
208V or 240V furnace are
burned out.
Slow heat-up. Low line voltage. Install line of sufficient size and
proper voltage. (Isolate furnace from
other electrical loads.)
Heavy load in chamber. Lighten load in chamber and
allow heat to circulate.
Wrong heating element. Install proper element.
One or two heating elements in Replace burned out elements.
208V or 240V furnace are
burned out.
14
Troubleshooting

Temperature erratic or no Controller malfunction. See troubleshooting section in
control over temperature. controller instructions.
Incorrect thermocouple. Check controller instructions for correct
thermocouple type.
Door switch does not cut Door switch malfunction. Realign or replace door switch.
power to furnace chamber.
Repeated element burn-out. Overheating furnace. Keep furnace under maximum
temperature. Closer supervision of
control setting.
Heating harmful materials. Enclose material in container. Clean up
spills in chamber. Ventilate chamber by
leaving door cracked slightly open when
heating known harmful reagents.
Controller malfunction. See troubleshooting section in controller
instructions.
Wrong element. Install proper element.
Oxidized thermocouple. Replace thermocouple.
Contamination present from Call Customer Service.
previous burn out.
Inaccurate temperatures. Incorrect thermocouple. Check controller instructions for correct
thermocouple type.
Oxidized or contaminated Replace thermocouple.
thermocouple.
Controller malfunction. See troubleshooting section in
controller instructions.
Poor thermocouple connection. Tighten connections.
Improper loading. Use proper loading procedures.
Poor ventilation of controller. Clear area around furnace controller.
Thermocouple or thermocouple See thermocouple installation.
extension wires have reversed
polarity.
15
ROUBLESHOO ING

16
Ordering Procedures
Please refer to the Specification Plate for the complete
model number, serial number, and series number when
requesting service, replacement parts or in any corre-
spondence concerning this unit.
All parts listed herein may be ordered from the hermo
Scientific dealer from whom you purchased this unit or
can be obtained promptly from the factory. When service
or replacement parts are needed we ask that you check
first with your dealer. If the dealer cannot handle your
request, then contact our Customer Service Department
at 563-556-2241 or 800-553-0039.
Prior to returning any materials, please contact our
Customer Service Department for a “Return Materials
Authorization” number (RMA). Material returned without
an RMA number will be refused.

Series 85 Gray Heating Elements
Top/Bottom EL9X1 (2 required) (FA1730, FA1736)
EL9X3 (2 required) (FA1740, FA1746)
EL9X5 (2 required) (FA1738)
EL9X7 (2 required) FA1748)
EL9X9 (2 required) FA1730-1, FA1736-1)
EL9X11 (2 required) FA1740-1, FA1746-1)
EL9X13 (2 required) FA1738-1)
EL9X15 (2 required) (FA1748-1)
Side EL9X2 (2 required) (FA1730, FA1736)
EL9X4 (2 required) (FA1740, FA1746)
EL9X6 (2 required) (FA1738)
EL9X8 (2 required) (FA1748)
EL9X10 (2 required) (FA1730-1, FA1736-1)
EL9X12 (2 required) (FA1740-1, FA1746-1)
EL9X14 (2 required) (FA1738-1)
EL9X16 (2 required) (FA1748-1)
Doors DR85X3A Bottom, insulated & painted (All models) Gray
DR85X3B Top, insulated & painted (All models) Gray
Door Safety Switch Assʼy PT219X3C Switch mounted on plate (All models)
Switch SWX19 Switch only
Optional Shelf PH42X1 See Fig. 1
Hearth Tray PHX2 3 7/8” X 8” Covers bottom heating element. Use to
elevate load/protect element. (3 supplied with furnace.)
Patching Cement C71X7 Premix Cement to patch insulation. Sold by the
pound.
17
Replacement Parts List

18
Figure 2
Back Wiring of 208 & 240 Volt 1700 Low & High emp. Furnaces
Back Wiring of 408 Volt 1700 Low & High emp. Furnaces
Wiring Diagrams

19
Back Wiring of 1736/46 Low & High emp. Furnaces
Back Wiring of 208 & 240 Volt 1700 Low & High emp. Furnaces
Figure 4
Figure 3
WIRING DIAGRAMS

One Year Limited Warranty
This Thermo Scientific product is warranted to 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 the manufacturer or (ii) the date the product is
purchased by the original retail customer (the “Commencement Date”). Except as expressly stated above, the
MANUFACTURER MAKES NO OTHER WARRANTY, EXPRESSED OR IMPLIED, WITH RESPECT TO THE
PRODUCTS AND EXPRESSLY DISCLAIMS ANY AND ALL WARRANTIES, INCLUDING BUT NOT LIMITED
TO, WARRANTIES OF DESIGN, MERCHANT ABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
An authorized representative of the manufacturer must perform all warranty inspections. In the event of a
defect covered by the warranty, we shall, as our sole obligation and exclusive remedy, provide free replace-
ment parts to remedy the defective product. In addition, for products sold within the continental United States
or Canada, the manufacturer shall provide free labor to repair the products with the replacement parts, but
only for a period of ninety (90) days from the Commencement Date.
The 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 the manufacturer or its duly authorized service representa-
tive, (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 Thermo Scientific prod-
ucts.
Heating elements, because of their susceptibility to overheating and contamination, must be returned to the
factory and if, upon inspection, it is concluded that failure is due to factors other than excessive high tempera-
ture or contamination, the manufacturer will provide warranty replacement. As a condition to the return of any
product, or any constituent part thereof, to the factory, it shall be sent prepaid and a prior written authorization
from the manufacturer assigning a Return Materials Number to the product or part shall be obtained.
IN NO EVENT SHALL THE MANUFACTURER 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.
For the name of the authorized Thermo Scientific product dealer nearest you or any additional information, contact us:
2555 Kerper Blvd., Dubuque, Iowa, 52004-0797
Phone: [phone] or 1-800-553-0039
Fax: [phone]
Web: www.thermo.com