Fisher Scientific Isotemp 3511FSQ User manual

Gravity Convection Ovens
Installation and Operation Manual
LT1479X6 (7000664) Rev. 3
© 2010 Fisher Scientific Inc.
All rights reserved
Printed in U.S.A.
Fisher Scientific
Isotemp

Fisher Scientific
MANUAL NUMBER LT1479X6 (7000664)
3 40434 8/11/15 Added installation clearance distances to pg 3-1 ccs
2 31325 2/16/15 Added explosion and fire warnings ccs
1 31259 10/27/14 Updated thermometer installation on pg 3-2 ccs
0 -- 5/4/10 Transfer Marietta (was LT1479X6 10/28/05) ccs
REV ECR/ECN DATE DESCRIPTION By
Preface
Gravity Convection Oven i
Models covered in this manual
Model Number Size Voltage
3511FSQ (664) 1.7 cu ft 120V
3511-1FSQ (671) 1.7 cu ft 240V

Fisher Scientificii Gravity Convection Oven
Preface
Contains Parts and Assemblies
Susceptible to Damage by
Electrostatic Discharge (ESD)
CAUTION
Important Read this instruction manual. Failure to read, understand and follow the instructions in this manual
may result in damage to the unit, injury to operating personnel, and poor equipment performance. s
Caution All internal adjustments and maintenance must be performed by qualified service personnel. s
Material in this manual is for information purposes only. The contents and the product it describes are subject
to change without notice. Fisher Scientific makes no representations or warranties with respect to this manual.
In no event shall Fisher Scientific be held liable for any damages, direct or incidental, arising out of or related
to the use of this manual.
©2010 Fisher Scientific. All rights reserved.

Fisher Scientific Gravity Convection Oven iii
Preface
Important operating and/or maintenance instructions. Read the accompanying text carefully.
Potential electrical hazards. Only qualified persons should perform procedures associated with this
symbol.
Equipment being maintained or serviced must be turned off and locked off to prevent possible injury.
Hot surface(s) present which may cause burns to unprotected skin, or to materials which may be
damaged by elevated temperatures.
Marking of electrical and electronic equipment, which applies to electrical and electronic equipment
falling under the Directive 2002/96/EC (WEEE) and the equipment that has been put on the market
after 13 August 2005.
This product is required to comply with the European Union’s Waste Electrical & Electronic
Equipment (WEEE) Directive 2002/96/EC. It is marked with the WEEE symbol. Fisher Scientific
has contracted with one or more recycling/disposal companies in each EU Member State European
Country, and this product should be disposed of or recycled through them. Further information on
Fisher Scientific’s compliance with this directive, the recyclers in your country and information on
these products will be available at www.fishersci.com.
4Always use the proper protective equipment (clothing, gloves, goggles, etc.)
4Always dissipate extreme cold or heat and wear protective clothing.
4Always follow good hygiene practices.
4Each individual is responsible for his or her own safety.

Fisher Scientificiv Gravity Convection Oven
Preface
Do You Need Information or Assistance
on Fisher Scientific Equipment?
The Fisher Scientific Sales Group can provide information on pricing and give you
quotations. We can take your order and provide delivery information on major equipment items or
make arrangements to have your local sales representative contact your. Our products are listed on
the internet and we can be contacted through our Internet home page.
1-800-766-7000 Customer Service
www.fishersci.com To order online
Fisher Scientific Product Service Support can supply technical information about proper
setup, operation or troubleshooting of your equipment. We can fill your needs for replacement parts
or provide you with on-site service. We can also provide you with a quotation on our Extended
Maintenance Program for our products.
Whatever products you need or use, we will be happy to discuss your applications. If you are
experiencing technical problems, working together, we will help you locate the problem and, chances
are, correct it yourself...over the telephone without a service call.
When more extensive service is necessary, we will assist you with direct factory trained
technicians or a qualified service organization for on-the-spot repair. If your service need is covered
by the Fisher Scientific Products warranty, we will arrange for the unit to be repaired at our expense
and to your satisfaction.
Regardless of your needs, professional service technicians are available by telephone to assist
you concerning our products Monday through Friday from 8:00 a.m. to 6:00 p.m. Eastern Time.
Please call or fax us at:
1-800-766-7000 Customer Service
1-800-926-1166 Orders Fax
International customers, please contact your local Fisher Scientific distributor.

Gravity Convection Oven vFisher Scientific
Table of Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Unpacking and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Electrical Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
Ordering Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
Section 1
Section 2
Section 3
Section 4
Section 5
Section 6
Section 7

Gravity Convection Oven 1-1Fisher Scientific
Section 1 Introduction
Thank you for selecting Fisher Scientific for your equipment needs.
Fisher Scientific Isotemp Gravity Convection Ovens are designed for use
in hospitals, industry, and school laboratories - wherever there is a need for
economic, yet reliable ovens for drying, sterilization, baking, evaporation
or similar type work. They are ideal for drying glassware, drying and/or
baking non-flammable crystalline chemicals, pre-heating crucibles or other
containers and drying filter paper strips or rounds.
The temperature range, controlled by a bimetallic thermostat on the front
control panel, is from ambient +5°C to 210°C. A sheathed heater produces
the unit’s heat and a pre-set high limit bimetallic thermostat is standard on
all models. A pilot light on the control panel indicates oven operation
status.
Helping to retain chamber heat is one-inch thick insulation of semi-
refractory fibers that is sandwiched between the double walls of the
chamber. The interior walls of the chamber are aluminum and the shelves
are steel wire as is the surface covering the heater area - all for more
efficient distribution of heat.
These ovens are built for rugged performance and long life. Each has a
durable powder-coated cold-rolled steel exterior. To inhibit rust, the
shelves are nickel-plated steel.
These instructions contain important operating and safety information.
The user must carefully read and understand these instructions before
using the oven. Your unit has been designed to optimize function,
reliability, safety and ease of use. It is the user’s responsibility to install the
oven in conformance with local electrical codes.

Gravity Convection Oven 2-1Fisher Scientific
Section 2 Specifications
Power Requirements
3511FSQ: 120 Volts, 50/60 Hz, 6.7 Amps, 800 Watts
Overall Dimensions
3511FSQ : 18½"W x 13½"D x 22½"H (47 x 34 x 57 cm)
Chamber Dimensions
3511FSQ: 16"W x 11-1/2"D x 16-1/8"H (41 x 29 x 41 cm)
Volume
3511FSQ : 1.7 cu. ft. (48.2 liters)
Shipping Weight
3511FSQ : 57 lbs. (26 kg)
Performance Characteristics
Temperature Range . . . . .All models ambient +5°C to 210°C
Uniformity at 100°C . . . . . . . . . . . . . . . . . . .±5.0°C
Control at 100°C . . . . . . . . . . . . . . . . . . . . . .±9.0°C
Environmental Operating Conditions
Pollution Degree*: . . . . . . . . . . . . . . . . . . . . . . . . .2
Installation Category*: . . . . . . . . . . . . . . . . . . . . . .II
Altitude: . . . . . .2000 Meters MSL (Mean Sea Level)
Humidity: . . . . . . .80% maximum, non-condensing
Electrical Supply: . . . . . . . . . . . . . . . . . . . .120VAC
Voltage Tolerance: . . . . .±10% of normal rated line
Temperature: . . . . . . . . . . . . . . . . . . . .15°C to 40°C
Product Usage: . . . . . . . . . . . . . . . . .Indoor use only
*Refer to IEC 664-1

Gravity Convection Oven 3-1Fisher Scientific
Section 3 Unpacking and Installation
The shipping carton should be inspected upon delivery. When received,
carefully examine for any shipping damage before unpacking. If damage is
discovered, the delivering carrier should both specify and sign for the
damage on your copy of the delivery receipt.
Open the carton carefully making certain that all parts are accounted for
before packaging materials are discarded. After unpacking, if damage is
found promptly report it to the carrier and request a damage inspection
promptly.
Important Failure to request an inspection of damage within a few days
after receipt of shipment absolves the carrier from any liability for damage.
Call for a damage inspection promptly.
The oven should be located in an area free from drafts and strong
vibrations, as well as allowing for natural air movement to dissipate heat
from the oven. To ensure needed ventilation around the oven, allow 1.5
inches on each side and 3 inches at the back. Allow enough distance above
the unit to be able to install and retrieve the thermometer. Do not place
on or near a combustible surface or material.
• Use a properly grounded electrical outlet of correct voltage and current
handling capacity.
• Do not remove or modify grounded power plug. Use only properly
grounded outlets to avoid shock hazard.
Note Disconnect unit from the power source when not in use.
Location
Electrical
Requirements

3-2 Gravity Convection Oven Fisher Scientific
Section 3
Unpacking and Installation
Installation 1. Install the shelves on the rack inside the oven.
2. Turn the power switch OFF and plug the oven into a receptacle that
provides the required voltage as indicated on the unit’s nameplate.
3. Install an immersion thermometer (furnished by the user) through the
thermometer grommet and into the thermometer holder.
4. Adjust the immersion depth to 6-7/8” (175 mm), measured from the
bulb to the top of the rubber washer.
5. Insert this assembly into the thermometer vent ring that is located on
top of the oven.
6-7/8" 175 mm
(Top of Oven)
Thermometer Vent Ring
Thermometer Holder
Thermometer Grommet

Gravity Convection Oven 4-1Fisher Scientific
Section 4 Operation
1. Turn the power switch ON – status lamp will light.
2. Set the control thermostat to obtain the desired temperature. Read the
user-supplied thermometer, not the control dial; the control dial is
graduated from 0 to 10 for reference purposes only. It is suggested that
a log be made of control settings vs. thermometer readings to assist in
obtaining desired temperatures. However, it is important to bear in
mind that the applicability of such a chart will be affected by changes
in line voltage and ambient conditions.
3. Allow time for the oven to reach its maximum set temperature and to
stabilize.
Warning Do not use in the presence of flammable or combustible
materials or explosive gases. Do not use in the presence of pressurized or
sealed containers – fire or explosion may result, causing death or severe
injury. s
Warning Do not heat any substance above a temperature that will cause it
to emit toxic fumes; death or severe injury may result. s
Caution It is the user’s responsibility to monitor oven action when setting
and maintaining operating temperature; oven failure may occur with
possible property damage and/or injury to personnel. s
Status Lamp
Control Thermostat
Power Switch
ON
OFF
Figure 4-1. Control Panel
Start-Up

4-2 Gravity Convection Oven Fisher Scientific
Section 4
Operation
Warning Hot Surface At the higher temperatures, the exterior of the oven
and particularly the thermometer vent ring on the top become
uncomfortably warm to the touch. To avoid burns, do not touch these
surfaces. s
Warning To avoid electrical short or shock, do not allow any metal object
to protrude into the space beneath shelf that serves as heater shield inside
the oven. In addition, do not operate oven with shield removed. s
Warning This unit is not explosion-proof. Do not use in the presence of
flammable or combustible materials; fire or explosion may result. Unit
contains components that may ignite such materials. Before operating
oven, always observe the following safety precautions:
• Fumes and spillage from acidic solutions cause corrosion of the
stainless steel chamber. Care should be taken to maintain a neutral
pH at all times.
• The heater for the oven is in the bottom of the unit. Surface
temperatures at the bottom cover of the unit may be higher than
set point temperature. For example: A plastic container on the
heater cover may become hot enough to melt/burn the container at
settings below the melting point of plastic. Do not place items on
the heater cover. s
Thermometer Vent Ring
Heater Shield
Figure 4-2. Locations

Gravity Convection Oven 5-1Fisher Scientific
Section 5 Maintenance
Because of their rugged, simple construction, these ovens require very little
maintenance. Ordinary cleaning will suffice. The bottom shelf that covers
the heater can be removed for easy access to the heater area.
Clean up any spills as soon as possible to prevent materials being baked on
surfaces. When the oven is cool, use a mild soap and water to clean
surfaces. Rinse thoroughly and dry. It is best to avoid highly abrasive
cleaners that can damage the finish of the interior surfaces and shelves.
If the oven fails to heat, there may be several possible causes:
• Oven is not receiving electrical power.
• Heater is burned out.
• Thermostat is malfunctioning.
Have a qualified electrical technician determine the cause of the problem
and make the necessary repairs. Fisher Scientific can provide the service
and replacement parts needed.
Note Make no attempt to service or repair a Fisher Scientific Isotemp
product under warranty. After the warranty period, consultation is advised,
especially when the repair may be technically sophisticated or difficult. If
assistance is needed, call Technical Services. No products should be
returned without prior approval from Fisher Scientific.
Warning Disconnect from power source prior to maintenance and/or
servicing. s

Section 6 Replacement Parts
Gravity Convection Oven 6-1Fisher Scientific
DESCRIPTION PART NUMBER
Tension Catch 600-124-00
Handle 560-165-00
Status Lamp Base 360-233-01
Status Lamp Lens (amber) 360-235-00
Power Switch 440-292-00
Thermometer Grommet 790-247-00
Thermometer Holder 910-039-00
Control Thermostat 920-280-00
Thermostat Knob 560-265-00
Hi-Limit Thermostat 920-413-00
Heater 340-214-00
Shelves 810-303-00
Refer to the Specification Plate for the complete model number, serial
number, and series number when requesting service, replacement parts or
in any correspondence concerning this unit.
All parts listed herein may be ordered from Fisher Scientific. When service
or replacement parts are needed, contact our Technical Services
Department.
Prior to returning any materials to Fisher Scientific, contact our Technical
Services Department for a “Return Goods Authorization” number (RGA).
Material returned without an RGA number will be refused.
Ordering Procedures

Section 7 Wiring Diagram
Gravity Convection Oven 7-1Fisher Scientific
WH1480X1
WM1480X1
CR1480X1
GRN
BLK
WHT
WM1480X2
ON (I)
CONTROL THERMOSTAT WITH SHAFT