Shellab SRI3-2 User Manual

LOW TEMPERATURE

INCUBATOR

SRI3 SRI3-2

Previously designated as:

LI5 LI5-2

INSTALLATION AND OPERATIONAL MANUAL

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]

REV. 01/11

4861574

2

TABLE OF CONTENTS

SECTION 1.0 RECEIVING AND INSPECTION
SECTION 2.0 INSTALLATION
SECTION 3.0 CONTROL OVERVIEW
SECTION 4.0 OPERATION
SECTION 5.0 MAINTENANCE
SECTION 6.0 TROUBLESHOOTING
SECTION 7.0 PARTS LIST

UNIT SPECIFICATIONS
SCHEMATICS

This unit is a general purpose Biochemical Oxygen Demand (BOD) incubator 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. This unit is not intended for
hazardous or household locations or use.

3

RECEIVING AND INSPECTION

Section

Your satisfaction and safety require a complete understanding of this unit. Read
the instructions thoroughly and be sure 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. 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 necessary, the carrier will arrange for official inspection to substantiate your
claim.

1.3 Return Shipment: Save the shipping crate until you are sure all is well. If for
any reason you must return the unit, first contact your customer representative
for authorization. Supply nameplate data, including model number and 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. This unit
is equipped with 2 shelves and a humidity pan/

WARNING: Never use this unit for the growth, cultivation, incubation or storage
of fruit flies (drosophila melanogaster). This unit is not designed for use with
fruit flies. Improper use of this unit, including use with fruit flies, will void any
warranty. Other units are specifically manufactured for fruit fly application, and

you should consult your dealer or the manufacturer in order to identify another
model suitable for your application.

4

Section

INSTALLATION

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.

This unit should remain upright for 24 hours prior to turning on. This will allow the oil
settle to in the refrigeration compressor.

2.1 Power Source: The electrical supply circuit to the incubator must conform to all

national and local electrical codes. Consult the incubator’s serial data plate for

the voltage, cycle wattage and ampere requirements before making connection.
VOLTAGE SHOULD NOT VARY MORE THAN 10% FROM THE SERIAL PLATE
RATING. This unit is intended for 50/60 Hz application. A separate circuit is
recommended to prevent possible loss of product due to overloading or failure of
other equipment on the same circuit.

2.2 Location: When selecting a site for the incubator, consider all conditions which
may affect performance, such as extreme heat from steam radiators, stoves,
ovens autoclaves, etc. Avoid direct sun, fast-moving air currents, heating/cooling
ducts, and high traffic areas. To ensure air circulation around the unit allow a
minimum of 20cm between incubator rear and sides and any walls, partitions or
obstructions to free airflow.

2.3 Lifting / Handling: This unit is 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 or 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.

2.4 Leveling: The unit must sit level and solidly. Turn the leveling feet
counterclockwise to raise level. If the unit must be moved, turn the leveling feet
in all the way to prevent bending and damage.

2.5 Cleaning: The incubator interior was cleaned at the factory, but not sterilized.
Remove all interior parts and clean with a disinfectant that is appropriate for your
application. DO NOT USE abrasives as this will damage the incubators interior.
DO NOT USE spray cleaners that might leak through opening and cracks and
get on electrical parts or that may contain solvents that will harm the coatings. A
thorough periodic cleaning is strongly recommended.

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.

5

CONTROL PANEL OVERVIEW

Section

3.1 Power Switch: The main power I/O (on/off) switch
controls all power to the unit and must be in the I/ON
position before any systems are operational.

3.2 Main Temperature Control: This control is marked
SET TEMPERATURE and consists of the digital
display and UP/DOWN arrow pads for inputting set
point temperatures and calibration.

3.3 Heating Lamp: This pilot lamp is marked
TEMPERATURE ACTIVATED and is ON when the
unit is heating up to set point and is blinking when
controlling temperature at set point.

3.4 Overtemperature Thermostat: This control is
marked SET OVERTEMPERATURE and is
completely independent of the Main controller. It acts
as an override in the event that the Main control fails
in the ON position.

3.5 Overtemperature Light: This pilot lamp is marked
OVERTEMPERATURE ACTIVATED and is on when
the thermostat has been activated. Under normal
operating conditions, this pilot light should never be
on.

3.6 Circuit Breaker: (Non-CE units) Adjacent to the
power cord the circuit breaker is an added measure
of protection against power source variations that if
tripped, must be reset by pushing in the button once
the reason for interruption has been cleared.

3.7 Fuse: (CE units only) Located at the back of the unit
within the power inlet, the fuse is an added measure
of protection against power source variations that, if
blown, must be replaced once the reason for the
interruption has been cleared. Note that the unit will
not power up unless the fuse is in place.

6

OPERATION

Section

4.1 Check power supply against unit serial plate. They must match.

4.2 Plug service cord into the grounded electrical outlet.

4.3 Push the power switch to the I/On position, and turn the Overtemperature

Thermostat to its maximum position, clockwise using a coin or flat edged tool.

4.4 Set Main Temperature Controller: Enter desired set point temperature. To
enter set point mode on the controller, press either the Up or Down arrow pad
one time. The digital display will start to blink, going from bright to dim. While
blinking, the digital display is showing the set point. To change the set point, use
the Up and Down arrow pads. If the arrow pads are not pressed for five (5)
seconds, the display will stop blinking and will read the temperature of the unit.
Note that the Overtemperature Thermostat should be turned to its maximum
position, (clockwise) until the unit has stabilized at desired set point temperature.
Allow the incubator at least 24 hours to stabilize.

4.5 Calibration: It is recommended that calibration is done once the unit is installed
in its working environment and has been stabile at set point for several hours.
Place a certified reference thermometer in the chamber. Be certain the
thermometer is not touching any shelving. Allow the temperature to stabilize
again until the thermometer reads a constant value for one hour. Compare the
digital display with the reference thermometer. If there is an unacceptable
difference, put the display into calibration mode by pressing both the Up and
Down arrow pads at the same time until the two outside decimal points begin to
flash. While the decimal points are flashing the display can be calibrated by
pressing the Up or Down arrow pads until the display reads the correct value.
Allow the incubator temperature to stabilize again, and recalibrate if necessary.

4.6 Set Overtemperature Thermostat: As mentioned previously, the
Overtemperature Thermostat should be initially set to its maximum position,
(clockwise), to allow the unit to stabilize. Once the incubator is stabile at the
desired set point, turn the Overtemperature Thermostat counterclockwise until
the OVERTEMPERATURE ACTIVATED light turns on. Next, turn the
Thermostat clockwise just until the light turns off. Then turn the Thermostat
clockwise 1/16 of an inch past the point where the light went out. This will set the
Overtemperature Thermostat at approximately 1C above main Temperature set
point.

4.7 Accessory Outlet: This unit has been supplied with a 1 amp accessory outlet
inside the chamber to provide power for equipment such as magnetic stirrers,
rockers, etc. Be certain the apparatus draws 1 amp or less. The power switch
on the front panel controls power to the outlet. Note that the apparatus may
provide additional heat that could affect the temperature range of this incubator.
It is recommended that testing be done with the incubator and any accessory
equipment to insure that the desired operating conditions can be met.

7

4.8 Load the chamber with sample bottles. See Figure 2 for bottle placement.

Figure 2

8

MAINTENANCE

Section

Note: Prior to performing maintenance and/or service on this incubator, disconnect the
unit from the power supply.

5.1 Cleaning: Cleaning and decontamination are recommended on a regular basis.

To prepare the unit for cleaning, disconnect the power cord and remove all
interior parts, such as shelves, trays, etc.

First clean the chamber with soap and water, rinse and let dry. To
decontaminate use a solution that is appropriate for your application. DO NOT
USE abrasives as this can damage the chamber interior. 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 the coatings. NEVER USE acids,
chemical thinner, gasoline, benzene, or like for cleaning the unit. Boiling water
and benzine can deform and damage plastic parts.

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
evaporates and dry before reattaching the unit to the power supply.

5.2 Compressor Compartments: Located at the back and bottom of the unit, the
compressor compartment can collect dust that will inhibit proper air flow. This
compartment should be vacuumed out at least once every six (6) months to
ensure maximum efficiency.

5.3 Defrosting: Generally defrosting should not be necessary. If ice build-up occurs
it is usually attributed to open containers, loose closures or frequent door
openings causing excessive moisture to build up in the chamber. Try to
eliminate these as possibilities. To defrost, remove all items from the chamber
and let the unit stand with the door open and the POWER OFF. Once frost is
gone, empty drip tray, wipe the chamber dry and power up the unit.

5.4 Storage: If the incubator is to be shut down for storage or transport, remove all
items, drip tray and shelves and be certain the chamber is dry. Screw in the
leveling feet. Review section 2.3, Lifting / Handling for transport instructions.

5.5 There is no maintenance required on electrical components. If the unit fails to
operate as specified, please review section 6 Troubleshooting, prior to calling for
technical service.

9

TROUBLESHOOTING

TEMPERATURE

Temperature too high

Controller set too high.

Display reads "HI"

Probe is unplugged, is broken or wire to sensor is broken.

Temperature too low

1/ Overtemperature thermostat set too low.
2/ Controller set too low.
3/ Unit not recovered from door opening – wait for display to stop

changing.

4/ Unit not recovered from power failure or being turned off – incubators

will need 24 hours to warm up and stabilize.

Display reads "LO"

Sensor is shorted.

Unit will not heat up at all

1/ Verify that controller is asking for heat by looking for controller light
2/ Do all controller functions work?
3/ Is the Overtemperature set high enough?

Indicated chamber temperature unstable

1/ ±0.1 may be normal
2/ Is fan working?
3/ Is ambient room temperature radically changing – either door opening

or room airflow from heaters or air conditioning ? – stabilize ambient

conditions
4/ Overtemperature set too low.
5/ Electrical noise – remove nearby sources of RFI including motors,

arcing relays or radio transmitters

Display and reference thermometer don’t
match

Calibration error.

Can't adjust set points or calibration

1/ Turn entire unit off and on to reset
2/ If repeatedly happens, call Customer Service

Calibrated at one temperature, but not at
another

This can be a normal condition when operating temperature varies widely.
For maximum accuracy, calibration should be done as close to the set
point temperature.

REFRIGERATION

Unit will not cool

If the compressor is running:
1/ See if condenser is cold but free of ice
2/ Be sure that fans are circulating air: in the chamber, and over

the compressor

Section

FOR PERSONAL SAFETY, ALWAYS DISCONNECT THE POWER BEFORE SERVICING.

In the event the incubator does not operate properly, check the following before calling for service.
Always make a visual inspection of the incubator and control console when troubleshooting to find loose
or disconnected wires which may be the source of trouble.

10

3/ Assure there is ample room around the unit as described in

Installation.
4/ Compare ambient specifications to Unit specifications.
If compressor isn’t running:
1/ Confirm that compressor cooling fan motor is operable

a- Dirty coil or poor circulation

b- Coil next to heat source

c- Ambient temperature too high

Ice build up in chamber

1/ Search for leak in door gasket.
2/ door being opened too often.
3/ open container/loose seal on bottles.

Making noise

1/ assure that fan is not miss-aligned.
2/ Steady internal clicking may be broken spring or valve – call
Customer Service.

MECHANICAL

Motor doesn't move

If shaft rubs or is frozen, relieve binding and retest

Motor makes noise

1/ Make sure that the fan or blower wheel is not contacting its
housing. Adjust the motor mounting bracket position to re-center
the fan or blower wheel, if necessary.
2/ Check the fan or blower wheel for damage or out of balance
condition. Replace the fan or blower wheel if it is damaged or out
of balance.
3/ Turn the motor shaft to make sure that it spins freely. If it binds
or the bearings make a rubbing or scrapping sound then replace
the motor.

Door not sealing

1/ Confirm that unit has not been damaged and body is square.
2/ Check to see that door gasket is in place and not damaged.

OTHER

Unit or wall fuse/circuit breaker is
blown

1/ Check wall power source
2/ Compare current draw 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

Contamination in chamber

1/ See cleaning procedure in operator’s manual
2/ Develop and follow Standard operating procedure for specific

application; include definition of cleaning technique and

maintenance schedule

11

PARTS LIST

Description

115V

220V

Circuit Breaker

1100505

1100505

Circulating Fan, chamber

4880545

4880545

Convenience Outlet

6100525

6100526

Cooling Fan, compressor

4880564

4880564

Factory Set Over­Temperature Control

1750715

1750715

Heating Element

2350508

44.6 ohms

2350508

150.1 ohms

I/O (On/Off) Power Switch

7850570

7850570

Main Temperature Controller

1750967

1750968

OTP and Compressor High
Cut Thermostat

1750862

1750813

Pilot Light, Green

4650554

4650554

Pilot Light, Red

4650553

4650553

Power Cord, USA

1800516

1800537

Step Down Transformer

--

8350515

Section

12

UNIT SPECIFICATIONS

Weight

Shipping

Net

SRI3 (LI5)

SIR3-2 (LI5-2)

130 lbs.

108 lbs.

Dimensions

Exterior WxDxH

Interior WxDxH

SRI3 (LI5)

SIR3-2 (LI5-2)

24 x 21 x 33.75 in.

60.96 x 53.34 x 85.73 cm.

16 x 12 x 21.5 in.

40.64 x 30.48 x 54.61 cm.

Capacity

2.39 cubic feet

67.65 cubic liters

Temperature

Range

Uniformity

SRI3 (LI5)

SIR3-2 (LI5-2)

0 to +45C

+0.5C @ 20C

13

BLK WHT

BLK WHT

120VAC

BLK

WHTWHT

BLK

IF

BLU WHT

BLK

WHT

BLK

HT

BLK

HT

WHT

HT

WHT

WHTRED

BLK

YEL

CF

YEL

WHT

WHT

YEL

21

4

21

4

4650553

G

R

4650554

4880564 COMPRESSOR

FAN

4880545 INTERNAL FAN

THE COMPRESSOR IS PART

OF THE BASE UNIT

1750862

PRESET TO 35°C

1750862

9570863 ELEMENT ASSY

1750715

155°F/68°C

2350508 ELEMENT COIL

45

SAFETY ACTIVATED

HEATING ACTIVATED

OUTLETS

6100525

POWER CORD AND PLUG

1100505

CIRCUIT BREAKER 15A

GREEN LIGHTED POWER SWITCH 7850570

HOT

NEUTRAL

GROUND

LOAD

SENSOR

TEMPERATURE

CONTROL

1750967

ORG

WIRE DIAGRAM

110V

(9851235)

14

220V

BLK RED

IF

BLU RED

BLK

RED

ORN

BLK

HT

BLK

HT

RED

HT

RED

REDRED

BLK

YEL

CF

YEL

RED

RED

21

4

21

4

4650553

G

R

4650554

4880564 COMPRESSOR FAN

4880545 INTERNAL FAN

THE COMPRESSOR IS PART

OF THE BASE UNIT

1750862

PRESET TO 35°C

½ 1750813

9570864 ELEMENT ASSY

1750715

155°F/68°C

2350508 ELEMENT COIL



SAFETY ACTIVATED

HEATING ACTIVATED

241

½ 1750813

BLK BLK

BRN BRN

8350515 TRANSFORMER

240/120VAC 750VA

YEL

2800502

EMI FILTER

HOT

NEUTRAL

GROUND

LOAD

POWER CORD

1800541

BLK BLK

BLK

RED RED

RED

HT

FUSE FUSE

OUTLETS

6100531

GREEN LIGHTED POWER SWITCH 7850570

TEMPERATURE

CONTROL

1750968

(9851236)