Shellab SRI21D-2 User Manual

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LOW TEMPERATURE

DIURNAL ILLUMINATION

INCUBATOR

SRI21D SRI21D-2

Previously designated as:

LI15 LI15-2

INSTALLATION AND OPERATION MANUAL

Revised 11/2013

4861575

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

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

2

TABLE OF CONTENTS

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

UNIT SPECIFICATIONS
WIRE DIAGRAMS

These units are general purpose Biochemical Oxygen Demand (BOD) incubators 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. These units are 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 operators are given adequate training before attempting to put the unit into
service. 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 your accessory package is complete. Each unit is equipped with
a key and four (4) shelves.

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

INSTALLATION

Section

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. It is
unnecessary for this unit to be installed by a technician.

Under normal circumstances this unit is intended for use indoors, at room temperatures between 18 and 28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 operating. This will allow the oil to settle in the compressor.

2.5 Power Source: See the incubator's serial/data plate for the voltage, cycle, phase and

ampere requirements. VOLTAGE SHOULD NOT VARY MORE THAN 10% FROM THE
DATA PLATE RATING. These units are intended for 50/60 Hz application. Electrical
supply to the unit must conform to all national and local electrical codes. A separate circuit
is recommended to avoid overloading or failure of other equipment on the same circuit.

2.6 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 and any walls or partitions which might obstruct free air flow.

2.7 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 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.

2.8 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 or damage.

2.9 Cleaning: The incubator's interior was cleaned at the factory, but not sterilizied. Remove

all interior parts, including shelves and clean thoroughly with a disinfectant that is
appropriate for your application. Regular periodic cleaning is required. Special care
should be taken when cleaning around sensing heads to prevent damage. DO NOT USE
chlorine based bleaches as this may damage the incubator interior. DO NOT USE spray
cleaners that might leak through cracks and openings and get on electrical components,
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.

5

GRAPHIC SYMBOLS

Section

Your incubator is provided with a display of graphic symbols on the control panel which
are designed to help identify the use and function of the adjustable components.

1. Indicates that you should consult your manual for further

description and discussion of a control or user item.

2. Indicates “Temperature”

3. Indicates “Overtemperature”

4. C Indicates “Degrees Centigrade”

5. Indicates “AC Power”

6. Indicates “Manual Adjustment”

7. Indicates “Potential Shock Hazard” behind partition

8. Indicates “Earth Ground”

9. Indicates “Unit should be recycled” (Not disposed of in

land-fill)

6

CONTROL PANEL OVERVIEW

Section

The SRI21D (LI15) comes with one control (Watlow PM) that can be set to do all light and
temperature setting functions. It has an ON/OFF Power Switch to turn the unit ON or OFF and
one Over Temperature Protection for High Temperature Limit.

4.1 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.

4.2 Main Temperature Control: This control is marked SET TEMPERATURE and AM/PM
LIGHT CONTROL. It has two digital displays. Top Display reads PROCESS
TEMPERATURE and bottom display reads SET POINT TEMPERATURE. The control is a
40-Step Ramp and Soak Programmable Control with two (2) Event Outputs.

4.3 Over Temperature Thermostats: This control are marked SET OVER TEMPERATURE

4.4 HEATING Light: Marked HEATING ACTIVATED, this pilot light indicates when the Main

4.5 OVERTEMP Light: Marked OVER TEMPERATURE ACTIVATED, this pilot light indicates

4.6 Circuit Breaker: Located on the rear bottom next to the cord inlet provides protection

and are equipped with adjustment knob and graduated dial. Completely independent of the
Main Controller, the Thermostat guards against any failure which would allow temperature
to rise past the Main Controllers set point. If temperature rises to the Over Temperature set
point, this thermostat takes control of the heating element and allows continued use of the
incubator until the problem can be resolved or service can be arranged. It is not
recommended that the unit be allowed to operate for an extended period of time using only
the Over Temperature thermostat as temperature uniformity will suffer.

Controller has activated the heating elements to reach and maintain set point temperatures.

when the Over Temperature Thermostat has been activated. Under normal operating
conditions this pilot light should never come on.

against power source variations. Protection is in addition to the automatic high temperature
limit designed into the heating element. If the Circuit breaker opens, the unit will shut down
and the cause should be determined and corrected before resetting the circuit breaker.

7

OPERATION

Section

The refrigeration system, heater, and air circulating fan are used in conjunction with the
temperature control circuit to achieve sensitive temperature control. The temperature sensor
located in the air stream senses any temperature deviation from the control point, and heat is
provided to maintain desired temperature. The circulating fan provides even air distribution
throughout the chamber and assures temperature uniformity.

Regardless of the temperature maintained, the refrigeration system operates continuously. This
constant operation minimizes component failures which are more frequently associated with a
cycling type operation. Note that a factory set Low-Limit Thermostat will shut off the compressor
when temperatures reach around 1C so samples will not freeze.

5.1 Plug incubator into electrical service corresponding to data plate rating located on the side

of the unit. Turn the power switch to the ON position and turn the Overtemperature
Thermostat to its maximum position, clockwise using a coin or flat edged tool.

5.2 Place a certified reference thermometer (not supplied) in the center of the chamber. Be

certain the thermometer is not touching any shelving or chamber walls. Taping the
thermometer to a petri dish raises it off the shelf and keeps the scale in view. Placing a
reference thermometer in the chamber at this stage of operation will allow for calibrating
the control without the loss of processing time.

5.3 Loading Procedure: Adequate spacing should be allowed between items whenever

possible. Proper spacing will allow maximum air circulation, which is necessary for
temperature uniformity.

5.4 Frost Buildup: Excessive frost buildup on the evaporator coil located on the lower rear

wall can affect temperature uniformity. Liquid containers should never be placed in the
chamber without covers. The evaporation of moisture within the chamber will only add
frost and hasten the need for defrosting. Defrosting instructions are available in
Maintenance Section 6.