Shellab SGO6E-2 User Manual

ECONOMY

OVENS

SGO1E SGO1E-2
SGO2E SGO2E-2
SGO4E SGO4E-2
SGO6E SGO6E-2

PREVIOUSLY DESIGNATED AS:

EX1, EX2, EX4, EX6

EX1-2 EX2-2, EX4-2, EX6-2

INSTALLATION AND OPERATION MANUAL

12/2013

4861566

Sheldon Manufacturing Inc. P.O. Box 627 Cornelius, Oregon 97113

EMAIL: [e-mail] INTERNET: http://www.Shellab.com/~Shellab

1-800-322-4897 [phone] FAX [phone]

2

TABLE OF CONTENTS

SECTION 1.0 RECEIVING AND INSPECTION
SECTION 2.0 GRAPHIC SYMBOLS
SECTION 3.0 INSTALLATION
SECTION 4.0 CONTROL PANEL OVERVIEW
SECTION 5.0 PRECAUTIONS
SECTION 6.0 OPERATION
SECTION 7.0 MAINTENANCE
SECTION 8.0 TROUBLESHOOTING
SECTION 9.0 PARTS LIST

UNIT SPECIFICATIONS
WIRE DIAGRAM

This unit is a special purpose oven for professional, industrial or educational use where the
preparation or testing of materials is done at approximately atmospheric pressure and no
flammable volatile or combustible materials are being heated or placed near or on top of
unit. This unit is not intended for hazardous or household locations or use.

3

RECEIVING AND INSPECTION

Section

1

Your satisfaction and safety require a complete understanding of this unit, including
its proper function and operational characteristics. Read the instructions thoroughly
and be sure that all operators are given adequate training before attempting to put
the unit in service. Note: This equipment must be used only for its intended
application; any alterations or modifications will void your warranty.

1.1 Inspection: The carrier, when accepting shipment, also accepts responsibility for

safe delivery and is liable for loss or damage claims. On delivery, inspect for visible
exterior damage, note and describe on the freight bill any damage found and enter
your claim on the form supplied by the carrier.

1.2 Inspect for concealed loss or damage on the unit itself, both interior and exterior. If
any, the carrier will arrange for official inspection to substantiate your claim.

1.3 Return Shipment: Save the shipping carton until you are sure all is well. If for any
reason you must return the unit, first contact your customer service representative
for authorization, and supply data plate information including serial number. Please
see the manual cover for information on where to contact customer service.

1.4 Accessories: Verify that all of the equipment indicated on the packing slip is
included with the unit. Carefully check all packaging before discarding. Each unit is
equipped with 2 shelves, 8 shelf clips, a thermometer and thermometer clip.

4

GRAPHIC SYMBOLS

Section

2

Your oven is provided with a display of graphic symbols to help in identifying the use and
function of the available adjustable components.

2.1 This symbol, when shown, indicates that you should consult your

manual for further description or discussion of a control or user item.

2.2 Indicates "AC Power"

2.3 Indicates "Adjustable Temperature"

2.4 Indicates “Manual Control”

2.4 Indicates "Heating"

2.5 Indicates "Over Temperature"

2.6 Indicates “Protective Earth Ground ”

2.7 Indicates “Potential Shock Hazard”

2.8 Indicates “Unit should be recycled” (Not disposed of in land-fill)

5

INSTALLATION

Section

3

Local city, county, or other ordinances may govern the use of this equipment. If you have
any questions about local requirements, please contact the appropriate local agency.
Installation may be performed by the end user.

Under normal circumstances this unit is intended for use indoors, at room temperatures
between 5 and 40C, at no greater than 80% Relative Humidity ( at 25C) and with a
supply voltage that does not vary by more than 10%. Customer service should be
contacted for operating conditions outside of these limits.

3.1 Power: The power source must match the voltage, cycle, phase and ampere
requirements listed on the data plate (located just above the power cord on the back
side of the oven). The unit is intended for 50/60 HZ application. Make sure your
power supply matches that shown on the data plate. VOLTAGE SHOULD NOT
VARY MORE THAN 10% FROM THE DATA PLATE RATING. A separate circuit is
recommended to preclude loss of product due to overloading or circuit failure. Note
that the electrical supply to the unit must conform to all national and local electrical
codes.

3.2 Location: When selecting a site for the oven, consider conditions that may effect
performance, such as heat or cold from air vents, fast moving air currents, other
ovens, autoclaves, direct sun, etc. Avoid high traffic areas that may reduce
accessibility to the oven and allow at least 30 cm between the unit and surrounding
walls or partitions that might obstruct free airflow.

3.3 Lifting/Handling: These units are heavy and care should be taken to use
appropriate lifting devices that are sufficiently rated for these loads. Units should
only be lifted from their bottom surfaces. Doors, handles, and knobs are not
adequate for lifting or stabilization. The unit should be completely restrained from
tipping during lifting and transport. All moving parts, such as shelves and trays
should be removed and doors need to be positively locked in the closed position
during transfer to prevent shifting and damage.

3.4 Leveling: The unit must sit level and solidly. The oven is equipped with non­adjustable rubber feet to raise it off the counter and prevent sliding; however, the
counter must be level to provide optimum working and safety conditions.

3.5 Cleaning: The oven was cleaned at the factory, but not sterilized. Remove all
interior parts, including shelves and shelf clips. If assembled and clean the inside of
the chamber thoroughly with a disinfectant that is appropriate for your application.
DO NOT USE chlorine-based bleaches or abrasive cleaners, as they will damage
the ovens interior surfaces. DO NOT USE spray cleaners that might leak through
openings and cracks and get on electrical parts or that may contain solvents that will
harm coatings. A regular periodic cleaning is recommended.

6

WARNING: Never clean the unit with alcohol or flammable cleaners with the unit
connected to the electrical supply. Always disconnect the unit from the electrical
service when cleaning and assure all volatile or flammable cleaners are evaporated
and dry before reattaching the unit to the power supply.

3.6 Shelves: Place shelves in the chamber at desired position. See Figure 1.

Figure 1

7

CONTROL PANEL OVERVIEW

Section

4

Figure 2

4.1 Power Switch: The main power I/O (on/off) switch controls all power to the oven. It

must be in the I, or ON position before any systems are operational.

4.2 Main Temperature Controller: Marked SET TEMPERATURE, this control is
equipped with an adjustment knob and a graduated dial. The graduated dial is
marked with 10 major increments and 50 minor increments. The increments can be
used as index points for setting and returning to set point temperatures.

4.3 HEATING light: This green pilot light is marked HEAT ACTIVATED and indicates
when the element has been activated and the oven is heating. When set point is
reached the pilot light will cycle on and off as the elements maintain the temperature
selected.

4.4 Over Temperature Thermostat: Marked SET OVERTEMPERATURE, this control

4.5 Over Temperature light: This red pilot light is marked OVERTEMPERATURE

is completely independent of the Main Temperature control and is equipped with an
adjustment knob that requires a flat-edged tool when making adjustments to
eliminate accidental changes. It provides safety temperature protection for the oven.
If for any reason the oven temperature rises above the Main Temperature control’s
set point, the Over Temperature Thermostat will limit the rise to approximately 10C
above the set point selected.

ACTIVATED and is on when the Over Temperature Thermostat has been activated
and taken control of the elements. Under normal operating conditions this pilot light
should never be on.

8

PRECAUTIONS

Section

5

This unit has been designed with a dampered vent from the chamber. In order to work
effectively and safely, some precautions will need to be taken by the operator.

5.1. The bottom surface of the chamber should not be used as a work area.

5.2. In most applications, the exhaust damper will need to be open during drying or

degassing for best results.

5.3. THIS OVEN IS NOT AN EXPLOSION PROOF OVEN AND IS NOT DESIGNED TO

HANDLE COMBUSTIBLE GASSES. Do not place explosive, combustible or
flammable materials into the chamber.

5.4. Some of the out-gassed byproducts may be hazardous or unpleasant to operating

personnel. If this is the case, the exhausts should be positively ventilated to the
outside and dealt with according to local regulations. Your dealer can provide you
with a power exhaust that greatly helps under these applications.

5.5. Do not place sealed or filled containers in the oven chamber.

5.6. This oven is NOT designed for use in Class I, II, or III locations as defined by the

National Electrical Code.

5.7. This oven is not intended, nor can it be used, as a patient connected device.

9

OPERATION

Section

6

6.1 Power Supply: The power supply must be properly grounded (earthed) and correctly sized to match
the unit data plate rating. The supply voltage must match the data plate voltage within 10%. If
supplied with a detachable cord set, plug the female end into the inlet on the unit and the male plug
into the supply. Assure that units requiring a fuse have a fuse installed.

6.2 Push the power switch to the ON position and turn the Over Temperature Thermostat to its maximum
position, clockwise so it will not interrupt the setting of the Main Temperature control.

6.3 Place the reference thermometer through the exhaust port on top of the unit; a clip is provided with
your accessory package.

6.4 Setting Main Temperature: The operating range for this oven is ambient room temperature + 5C to
200C. To set the Main Temperature Controller turn the knob to the desired oven temperature, using
the graduated dial as a reference guide. Allow one hour for the temperature to stabilize. Using the
reference thermometer, verify the oven temperature; if it is not at the desired value, turn the control
knob up or down as needed. Allow the temperature to re-stabilize, continuing the process until the
exact desired temperature is achieved.

Note: Slight vapor or smoke may occur in the initial heat-up. This is a normal occurrence when
the oven is first brought up to temperature and protective coatings on the element become hot.

6.5 Setting Over Temperature: As stated in section 6.2, the Thermostat should be set to its maximum

position. Now turn the control knob counterclockwise just until the OVERTEMPERATURE
ACTIVATED light comes on. Next, slowly turn the control knob clockwise just until the light goes off.
Then turn the control knob clockwise two (2) minor scale divisions past the point where the light went
out. The Over Temperature Thermostat should now be set at approximately 10C above the Main
Temperature set point. Note that it is not recommended that the unit be allowed to operate using the
Over Temperature Thermostat as the temperature controller for an extended period of time. See the
Troubleshooting section if the Thermostat is activated.

10

MAINTENANCE

Section

7

Note: Prior to any maintenance or service on this unit, disconnect service cord from
the power supply.

7.1 Cleaning: Clean the oven interior on a regular basis. When washing interior of unit,
handle gasket carefully so as not to impair the positive seal. Clean the inside of the
chamber thoroughly with a disinfectant that is appropriate for your application. Make
sure to rinse the cleaned surface with a damp cloth. DO NOT USE chlorine-based
bleaches or abrasive cleaners, as they will damage the oven chamber. DO NOT
USE spray cleaners that might leak through openings and cracks and get on
electrical parts or that may contain solvents that will harm coatings.

WARNING: Never clean the unit with alcohol or flammable cleaners with the unit
connected to the electrical supply. Always disconnect the unit from the electrical
service when cleaning and assure all volatile or flammable cleaners are evaporated
and dry before reattaching the unit to the power supply.

7.2 Storage: If the unit is to be shut down for an extended period of time, wipe the
chamber clean and let dry before closing door to eliminate possibility of
contamination. If the unit is to be transported, remove shelving and trays, clasp the
door shut and disconnect the power supply. Please refer to Section 3.3, Lifting /
Handling for further direction.

7.3 No maintenance is required on the electrical components. If oven fails to operate as
specified please review Section 8.0 Troubleshooting, prior to calling customer
service.

11

TROUBLESHOOTING

TEMPERATURE

Temperature too high

1/ controller set too high-see section 6.4
2/ controller failed on – call Customer Service
3/ wiring error – call Customer Service

Chamber temp spikes over set point and
then settles to set point

Recalibrate – see section 6.3 and 6.4

Temperature too low

1/ Thermostat set too low – see section 6.5
2/ controller set too low – see section 6.4
3/ unit not recovered from door opening – wait for heating indicator to turn

off
4/ unit not recovered from power failure or being turned off – oven will
need 1 hour to warm up and stabilize
5/ element failure – see if heating indicator is on; compare current draw to
data plate
6/ controller failure – confirm with front panel light that controller is calling
for heat
7/ Thermostat failure – confirm with front panel light that it is operating
correctly
8/ wiring problem – check all functions and compare wiring to schematic
in section 9.0 - especially around any areas recently worked on

9/ loose connection – call customer service

Unit will not heat over a temperature that
is below set point

1/ confirm amperage and voltage match data plate
2/ confirm that set point is set high enough –turn Thermostat all the way
clockwise and see if heating light or safety light comes on
3/ check connections to sensor
4/ check calibration – using independent thermometer, follow instructions
in section 6.4

Unit will not heat up at all

1/ verify that controller is asking for heat by looking for heating indicator
light – if pilot light is not on continuously at initial start up, there is a
problem with the controller
2/check amperage – amperage should be virtually at maximum rated
(data plate) amperage
3/ is the Thermostat set high enough? – for diagnostics, should be fully

clockwise with the pilot light never on

4/ has the fuse/circuit breaker blown?

Indicated chamber temperature unstable

Section

8

12

1/ ±0.1 may be normal but gravity models may vary ±2.0 degrees
2/ is ambient room temperature radically changing – either door opening
or room airflow from heaters or air conditioning ? – stabilize ambient
conditions .
3/ it may happen if exhaust stack is 100% open – adjust stack to at least

¼ closed.

4/ calibration sensitivity – call Customer Service
5/ Thermostat set too low – be sure that it is more than five degrees over
desired set point; check if pilot is on continuously; turn controller knob
completely clockwise to see if problem solved then follow instructions in
section 6.5 for correct setting.

Will not maintain set point

1/ assure that set point is at least 5 degrees over ambient room
temperature.
2/ see if ambient is fluctuating

MECHANICAL

Door not sealing

1/ Confirm that the door gasket is aligned properly.
2/ Confirm that unit has not been damaged and that the body is square.

OTHER

Unit or wall fuse/circuit breaker is blown

1/ check wall power source
2/ compare current draw and compare to specs on data plate
3/ see what other loads are on the wall circuit

Unit will not turn on

1/ check wall power source
2/ check fuse/circuit breaker on unit or in wall
3/ check all wiring connections, esp. around the on/off switch

Unit is smoking – out of box

Put unit under vent and run at full power for one hour.

Contamination in chamber

1/ See cleaning procedure section 7.1
2/ Develop and follow a standard operating procedure for specific
application; include definition of cleaning technique and maintenance
schedule

13

PARTS LIST:

Description

115V

220V

Cord Set

1800510

1800500

Door Gasket

3450722

3450722

Door Handle

3800610

3800610

Filter EMI

2800502

2800502

Fuse

3300516

3300515

Fuse Holder

N/A

3300501

Inlet with Fuse Drawer

4200505

N/A

Heating Element, SGO1E / SGO1E-2 (EX1/ EX1-2)

9570637

9570642

Heating Element, SGO2E / SGO2E-2 (EX2/ EX2-2)

9570640

9570644

Knob, Main Temperature

4450528

4450528

Knob, Over Temperature

4450506

4450506

Main Temperature Controller

1750863

1750863

On/Off (I/O) Switch

7850570

7850570

Over Temperature Thermostat

1750615

1750648

Pilot Light, green

4650554

4650554

Pilot Light, red

4650553

4650553

Shelf Clips

1250511

1250511

Shelf, SGO1E / SGO1E-2 (EX1/ EX1-2)

5080538

5080538

Shelf, SGO12 / SGO2E-2 (EX2 / EX2-2)

5080539

5080539

Thermometer

8200509

8200509

Thermometer Clip

5080865

5080865

Weight

Shipping

Net

SGO1E / SGO1E-2 (EX1/ EX1-2)

45 lbs.

38 lbs.

SGO2E / SGO2E-2 (EX2/ EX2-2)

67 lbs.

60 lbs.

Dimensions

Exterior WxDxH

Interior

SGO1E / SGO1E-2 (EX1/ EX1-2)

18X16.5X21.25”

12 X 12 X 14”

SGO2E / SGO2E-2 (EX2/ EX2-2)

21 X 17.5 X 23.5”

17 X 12 X 17”

Capacity

Cubic Feet

SGO1E / SGO1E-2 (EX1/ EX1-2)

1

SGO2E / SGO2E-2 (EX2/ EX2-2)

2

Temperature

Range

Uniformity

SGO1E / SGO1E-2 (EX1/ EX1-2)

Amb+5° to 200C

+4C

SGO2E / SGO2E-2 (EX2/ EX2-2)

Amb+5° to 200C

+4C

SECTION

9

SGO1E / SGO1E-2 SGO2E / SGO2E-2

(EX1 / EX1-2 EX2 / EX2-2)

UNIT SPECIFICATIONS

14

PARTS LIST:

Description

115V

220V

Main Temperature Control

1750863

1750863

Over Temperature Control

1750615

1750648

Cord Set

1800516

1800537

Door Handle

3800510

3800610

Filter EMI

2800502

2800502

Fuse

3300516

3300515

Fuse Holder

N/A

3300501

Inlet with Fuse Drawer

4200505

N/A

Heating Element

9570771

9570801

On/Off Switch

7850570

7850570

Knob Main Temperature

4450528

4450528

Knob Over Temperature

4450506

4450506

Pilot Light Green

4650554

4650554

Pilot Light Red

4650553

4650553

Shelf Clips

1250511

1250511

Shelf

5500629

5500629

Thermometer Clip

5080865

5080865

Thermometer

8200509

8200509

Weight

Shipping

Net

SGO4 SGO4-2 (EX4 EX4-2)

180 lbs.

180 lbs.

Dimensions

Exterior WxDxH

Interior

SGO4 SGO4-2 (EX4 EX4-2)

20 X 24 X 31”

16 X 19 X 22”

Capacity

Cubic Feet

SGO4 SGO4-2 (EX4 EX4-2)

3.9

Temperature

Range

Uniformity

SGO4 SGO4-2 (EX4 EX4-2)

Amb+5° to 200C

+4C

SGO4E / SGO4E-2 (EX4 / EX4-2)

UNIT SPECIFICATIONS

15

PARTS LIST:

Description

115V

220V

Main Temperature Control

1750863

1750863

Over Temperature Control

1750615

1750648

Cord Set

1800516

1800537

Door Handle

3800610

3800610

Filter EMI

2800502

2800502

Fuse

3300516

3300515

Fuse Holder

N/A

3300501

Inlet with Fuse Drawer

4200505

N/A

Heating Element

9570774

9570803

On/Off Switch

7850570

7850570

Knob Main Temperature

4450528

4450528

Knob Over Temperature

4450506

4450506

Pilot Light Green

4650554

4650554

Pilot Light Red

4650553

4650553

Shelf Clips

1250511

1250511

Shelf

5130714

5130714

Thermometer Clip

5080865

5080865

Thermometer

8200509

8200509

Weight

Shipping

Net

SGO6E SGO6E-2 (EX6 EX6-2)

lbs.

lbs.

Dimensions

Exterior WxDxH

Interior WxDxH

SGO6E SGO6E-2 (EX6 EX6-2)

24 X 24 X 37”

20 X 19 X 28”

Capacity

Cubic Feet

SGO6E SGO6E-2 (EX6 EX6-2)

6.1

Temperature

Range

Uniformity

SGO6E SGO6E-2 (EX6 EX6-2)

Amb+5° to 200C

+4C

SGO6E / SGO6E-2 (EX6 / EX6-2)

UNIT SPECIFICATIONS

16

2800502

EMI

FILTER

1

2

4

BLACK HT

WHITE HT

TAN ULTRA HT TAN ULTRA HT

BLACK HT

BLACK HT

BLACK HT

WHITE HT

WHITE HT

BLACK

BLACK

BLACK

BLACK

POWER

INLET

4200505

GREEN LIGHTED POWER SWITCH 7850570

TEMPERATURE

CONTROL

1750863

OTL

1750615

HEATING

INDICATOR

4450554

OTL

INDICATOR

4450553

ELEMENT

2350503

WIRE DIAGRAM

SGO1E 100-120V

9851473

17

2800502

EMI

FILTER

1

2

4

BLACK HT

WHITE HT

TAN ULTRA HT

TAN ULTRA HT

BLACK HT

BLACK HT

BLACK HT

WHITE HT

WHITE HT

BLACK

BLACK

BLACK

BLACK

POWER

INLET

4200505

GREEN LIGHTED POWER SWITCH 7850570

TEMPERATURE

CONTROL

1750863

HEATING

INDICATOR

4450554

OTL

INDICATOR

4450553

1

2

4

WHITE HT

TOP ½ OTL

1750648

BOTTOM ½ OTL

1750648

ELEMENT

2350554

SGO1E-2 220-240V

9851474

18

2800502

EMI

FILTER

1

2

4

BLACK HT

WHITE HT

TAN ULTRA HT TAN ULTRA HT

BLACK HT

BLACK HT

BLACK HT

WHITE HT

WHITE HT

BLACK

BLACK

BLACK

BLACK

POWER

INLET

4200505

GREEN LIGHTED POWER SWITCH 7850570

TEMPERATURE

CONTROL

1750863

OTL

1750615

HEATING

INDICATOR

4450554

OTL

INDICATOR

4450553

ELEMENT

2350563

SGO2E 100-120V

9851475

19

2800502

EMI

FILTER

1

2

4

BLACK HT

WHITE HT

TAN ULTRA HT

TAN ULTRA HT

BLACK HT

BLACK HT

BLACK HT

WHITE HT

WHITE HT

BLACK

BLACK

BLACK

BLACK

POWER

INLET

4200505

GREEN LIGHTED POWER SWITCH 7850570

TEMPERATURE

CONTROL

1750863

HEATING

INDICATOR

4450554

OTL

INDICATOR

4450553

1

2

4

WHITE HT

TOP ½ OTL

1750648

BOTTOM ½ OTL

1750648

ELEMENT

2350554

SGO2E-2 220-240V

9851476

20

2800502

EMI

FILTER

1

2

4

BLACK HT

WHITE HT

TAN ULTRA HT TAN ULTRA HT

BLACK HT

BLACK HT

BLACK HT

WHITE HT

WHITE HT

BLACK

BLACK

BLACK

BLACK

POWER

INLET

4200505

GREEN LIGHTED POWER SWITCH 7850570

TEMPERATURE

CONTROL

1750863

OTL

1750615

HEATING

INDICATOR

4450554

OTL

INDICATOR

4450553

ELEMENT

2350563

SGO4E 100-120V

9851477

21

2800502

EMI

FILTER

1

2

4

BLACK HT

WHITE HT

TAN ULTRA HT

TAN ULTRA HT

BLACK HT

BLACK HT

BLACK HT

WHITE HT

WHITE HT

BLACK

BLACK

BLACK

BLACK

POWER

INLET

4200505

GREEN LIGHTED POWER SWITCH 7850570

TEMPERATURE

CONTROL

1750863

HEATING

INDICATOR

4450554

OTL

INDICATOR

4450553

1

2

4

WHITE HT

TOP ½ OTL

1750648

BOTTOM ½ OTL

1750648

ELEMENT

750W 76.8Ω

2350510

SGO4E-2 220-240V

9851478