BOD INCUBATORS
SRI27 SRI27-2
Previously designated
LI27 LI27-2
Installation and Operations Manual
REV 04/2014
4861651
Sheldon Manufacturing Inc. P.O. Box 627 Cornelius, Oregon 97113
EMAIL: [email protected] INTERNET: http://www.Shellab.com/~Shellab
1-800-322-4897
(503) 640-3000 FAX (503) 640-1366
TABLE OF CONTENTS
SECTION 1.0
RECEIVING AND INSPECTION
SECTION 2.0
INSTALLATION
SECTION 3.0
GRAPHIC SYMBOLS
SECTION 4.0
CONTROLS OVERVIEW
SECTION 5.0
OPERATION
SECTION 6.0
MAINTENANCE
SECTION 7.0
TROUBLESHOOTING
SECTION 8.0
PARTS LIST
UNIT SPECIFICATIONS
SCHEMATICS
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.
2
1
Section
RECEIVING AND INSPECTION
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 Service representative for authorization. Supply
data plate information including model number and serial number. For information on where to
contact Customer Service, please see the manual cover.
1.4
Accessories: Verify that all of the equipment indicated on the packing slip is included with the
unit. Carefully inspect all packaging before discarding. The unit is supplied with six (6) shelves,
one (1) Condensate Pan (with bracket), and four (4) casters.
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.
3
2
Section
INSTALLATION
This unit should remain upright for 24 hours prior to operating to allow the oil in the refrigeration
compressor to settle.
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 10 and
32C, at no greater than 75% 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.
2.1
Power Source: Before connecting the unit to the power source, the electrical supply circuit must
conform to all national and local electrical codes. The power source must match the cycle and
ampere requirements as noted on the data plate located on the side of the incubator. This unit is
intended for 50/60 HZ application. VOLTAGE SHOULD NOT VARY BY MORE THAN 10%
FROM THE DATA PLATE RATING. A separate circuit is recommended to prevent possible loss
of product due to the overloading or failure of other equipment on the same circuit.
2.2
Location: When selecting a site for the incubator, consider all conditions that may affect
performance, such as extreme heat from radiators, stoves, ovens, autoclaves, etc. Avoid direct
sun, fast moving air currents, heating and cooling ducts, and high traffic areas. To ensure air
circulation around the unit, allow a minimum of 20cm (8”) between incubator and any walls or
partitions that may obstruct free airflow. Allow a minimum of 30cm (12”) for top clearance of the
unit.
2.3
Lifting and 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.
2.4
Leveling: The unit must sit level. If leveling feet are used, turn the feet counter-clockwise to
raise the level. If casters are used, repeat the same process. Before moving the unit, both
casters and leveling feet must be screwed all the way in to prevent bending and damage.
2.5
Cleaning: The unit chamber should be cleaned and disinfected prior to use. Remove all of the
interior parts, if assembled, and clean thoroughly, including all corners using a suitable disinfectant
that is appropriate to your application. DO NOT use spray cleaners that might leak through
openings and cracks and get on electrical components, or that may contain solvents that will harm
coatings. DO NOT use chlorine-based bleaches or abrasives as they will damage metal interior.
Regular periodic cleaning is required. Special care should be taken when cleaning around sensing
heads to prevent damage.
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.
4
2.6
Installing Condensate Evaporator: This unit is supplied with an electric Condensate Evaporator
Pan. On units with casters, install mounting bracket on the back of the unit and slide condensate
pan onto the bracket. Then, install the drain tube so water will drain into pan. Plug the supplied
power cord into the condensate pan and plug other end into outlet on the control box on top of the
unit marked “Vaporizer.” On units without casters, install supplied spring on bottom of
condensate pan and set on floor in back of unit.
Condensate
Evaporator Pan
Mounting
Bracket
Power Cord
Units without casters (install springs)
Units with Casters (mount bracket)
Important Note: When loading shelves with product, allow space between rows of product for
proper air circulation and do not load product to block back wall. Leave at least 2” of air space
between product and ball wall.
5
3
Section
GRAPHIC SYMBOLS
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
4
Section
CONTROLS OVERVIEW
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: The Main Temperature Control is a Watlow EZ-Zone PM Control. It is
a PID Programmable Ramp and Soak with Event Outputs. It consists of an upper and lower
display, EZ Button, Advance Button, Infinite Button, and UP and DOWN Arrow Button. This Control
is for maintaining a constant process temperature and running a defrost schedule, if desired. We
highly recommend that you read the Watlow EZ-Zone PM Manual for detailed information on the
control.
4.3
Heating Light: This pilot lamp is ON when the unit is heating up to set point and is blinking when
controlling temperature at set point.
4.4
Low Limit Thermostat: Is located in the top of the Control Box behind the Control Panel on the
left hand side. It has been factory calibrated to 1°C and should not need any adjustments.
4.5
Defrost: Defrost System is tied in with the Main Temperature Control as an Event Output. To set
up a defrost schedule will be explained under the Maintenance Section.
4.6
Overtemperature Thermostat: This controller is marked SET OVERTEMPERATURE and is
equipped with an adjustment knob and a graduated dial from 1 to 10. Completely independent of
the Main Temperature Controller, the Overtemperature Thermostat guards against any failure of the
Main Temperature Controller which would allow temperature to rise past set point. If temperature
rises to the Overtemperature set point, the 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 Thermostat as temperature uniformity will suffer.
4.7
Over Temp Light: This pilot light comes on when the Overtemperature Thermostat has been
activated. Under normal operating conditions this light should never come on.
4.8
Circuit Breaker: Located in the back of the Control Box behind the Control Panel on the left side.
Circuit Breaker protects against short circuits within the unit. If Circuit Breaker is tripped, the unit
will shut down. Before resetting Circuit Breaker, the cause should be determined and corrected.
7
5
Section
OPERATION
The refrigeration system, heater, and air circulating fan are used in conjunction with the temperature
control circuit to achieve sensitive temperature control. The thermostat 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 if the temperature maintained, the compressor operates continuously. This constant
operation minimizes component failure which is more frequently associated with a cycle type operation.
Note that a factory set Low-Limit Thermostat will shut off the compressor when temperatures reach 1C.
5.1
The power supply must match the unit’s requirements listed on the data plate located on the side
of the incubator.
5.2
Plug the service cord into the power supply and turn the Power Switch to the ON position. Turn
the Overtemperature Thermostat to its maximum position, clockwise using a coin or flat edged
tool.
5.3
Place a certified reference thermometer (not supplied) in the center of the chamber. Be certain
the thermostat 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 the reference thermometer in the
chamber at this stage of operation will allow for calibrating the control with out the loss of
processing time.
5.4
Loading Procedure: Adequate spacing should be allowed between items whenever possible.
Proper spacing will allow maximum air circulation, which is necessary for temperature uniformity.
5.5
Set Main Temperature: The Temperature control has two (2) displays (Upper and Lower). The
Upper display is the Process Temperature and the Bottom Display is the Process Set Point. To
change Set Point, push UP Arrow to raise or push DOWN Arrow to lower Process Set Point.
After desired Process Set Point is reached, allow 24 hours for unit to stabilize.
5.6
Calibrating Main Temperature Control: It is recommended that calibration is done once the
unit is installed in its working environment. Once unit has been stable for several hours, compare
process display with reference thermometer. After comparing the two figures out the calibration
offset by subtracting the reference thermometer reading to the display reading. If the reference is
greater than the display, it will be a positive number. If the reference is smaller than the display, it
will be a negative number.
EXAMPLE:
REFERENCE
THERMOMETER
22°C
18°C
PROCESS
DISPLAY
20°C
20°C
OFFSET
CAL
2
-2
Once the Offset Calibration Number is established, it can then be entered into the
control. To enter into the control, push and hold both UP and DOWN Arrow Button
simultaneously for three (3) seconds or until A1 appears in the Upper Display and Oper
appears in the Lower Display. Then, push the Advance Key repeatedly unit I.CA
appears in the Bottom Display and a number value in the Upper Display. This number
8
value can be changed by using the UP or DOWN Arrow Buttons. Change the number
value to the Offset Calibration Number established earlier. If it is a negative number, you
subtract. If it is a positive number, you add. Once the Offset Calibration Number is
entered, push the Infinite Button repeatedly to exit to Home Page.
(Process
Temperature Display Top and Set Point Display Bottom.)
5.7
Set Overtemperture Thermostat: The Overtemperature Thermostat should be initially set to its
maximum position to allow the unit to stabilize. Once the temperature is stabile at the desired set
point, turn the Thermostat counterclockwise until the OVER TEMP light turns on. Next turn the
Thermostat clockwise just until the pilot lamp turns off. This will set the Overtemperature set
point at approximately 1C above the Main Temperature set point.
5.8
Low Temperature Control: This control is factory set and should NOT be adjusted. It is pre-set
at 1C and is an added feature that keeps samples from freezing.
5.9
High Temperature Control: This control is a Bimetallic Thermostat that is rated at 50C and is
not settable.
5.10
Accessory Outlet: There is an electrical outlet inside the chamber for use with equipment not
exceeding one (1) amp. Note that equipment in the chamber may provide additional heat that
could affect the temperature range of the incubator. It is recommended that testing be done with
the incubator and any additional equipment to insure that the desired operating conditions can be
met.
CAUTION: When operating at normal conditions, this incubator is capable of damaging certain
accessory equipment. Make certain that accessory equipment is capable of operating under the
conditions you intend to run your incubator.
5.11
Auto Tuning: Automatically changes PID Parameters to make the control run more stable at Set
Point. To execute an Auto Tune, push the Advance Button repeatedly until AUtI appears in the
Bottom Display and no in the Top. Change no to yES by pushing the UP or DOWN Arrow Button
and push the Infinite Button once to Return to Home Page is reached. The control will start
flashing AttN in the Bottom display and tUnI in the Top Display. When it stops flashing, Auto
Tuning is complete.
9
6
Section
MAINTENANCE
The design of the chamber is such that periodic maintenance is kept to a minimum. NO lubrication or
adjustments of components is needed. If the incubator is used frequently at temperatures below ambient
room temperature or in any manner that increases moisture build-up within the chamber, a frequent
defrosting schedule is recommended.
6.1
Defrosting: Frost can build up on the evaporator coils do to too much moisture entering the
chamber. The unit should be defrosted and cleaned on a regular basis. There are two (2)
methods to defrost: Manual and Running. A defrost schedule program can be programmed into
the control.
6.1.1
Manual Defrost: This process will need to be done at a time when the incubator will not
be in use for several hours. Push both UP and DOWN Arrows simultaneously for three
(3) seconds or until AI appears in the Top Display and OPEr in the Bottom Display. Push
the UP and DOWN Arrow until P.StA appears in the Top Display. Now push the Advance
Button repeatedly until Ent 1 appears in the Bottom Display and OFF in the Top Display.
Use the UP and DOWN Arrow Button to change OFF to ON and push the Infinite Button
repeatedly to return to Home Page. After returning to Home Page, a small number “2”
should be illuminated on the right side of the control. This represents that EVENT
OUTPUT 1 is active and the compressor is now shut off (no cooling). Turn the Process
Set Point up to 40°C and leave the door ajar about 3-4 inches and run for several hours.
After all the ice is melted and water evaporated, close the door and reset Process Set
Point to the desired Set Point. Repeat the same process as above to turn the EntI to the
OFF state. After returning to Home Page, the number “2” light should be off making
EVENT OUTPUT 1 inactive (compressor running). Allow unit to stabilize and then it will
be ready to use.
6.1.2
Defrost Scheduled Program: A Defrost Schedule Program can be set up through the
Main Temperature Control. The Control is set up at the factory to run an eleven (11) hour
fifty (50) minute compressor run time and a ten (10) minute compressor off time. When
running the program, the compressor will shut down for ten (10) minutes and cause a
temperature spike to occur inside the chamber for approximately thirty (30) minutes.
Depending on what the process Set Point dictates how drastic of a temperature spike
occurs. At 20°C, it will be a 2°C temperature rise. If these temperature spikes are
unacceptable, then use the Manual Defrost Method.
To start the program, first enter the desired Process Set Point. Then, push the EZ
Button. A small RAMP Symbol will illuminate on the right hand side of the control to
indicate the program is running. To stop the program, push the EZ Button again and the
Ramp Symbol will disappear and the program will stop. Do not stop the program while it
is in the defrost mode. The defrost mode is indicated by the Number “2” illuminated on
the right hand side of the control. Stopping the program while in this condition will make
the control stay in this condition (compressor not running). If program was stopped while
in the Defrost Cycle, go to the Manual Defrost Section to reset the EVENT OUTPUT 1
(Ent 1) to the OFF position. (compressor running)
10
6.1.3
Changing Defrost Schedule Times: The Defrost Schedule comes from the factory set
for eleven (11) hours, fifty (50) minutes compressor run time and ten (10) minutes off
time. These times can be altered to best fit your process. Keep in mind that the longer
the compressor run time, the longer compressor off time need to be and the greater the
temperature spike will occur. Do not set the Compressor Off Time Cycle less than five
(5) minutes because it could damage the compressor by trying to start before the
pressure can equalize in the refrigeration system. To change the time, push and hold the
Advance Button for three (3) seconds (or until P1 appears in the Top Display and Prof in
the Bottom Display). Push Advance Button again and P1 will appear in the Bottom
Display and “1” in the Top Display. (P1 and 1 represent STEP 1 in PROFILE 1.) Push
the advance Button again and SoAh will appear in the Top Display and StyP in Bottom
Display. (Represents Soaking Set Point.) Push Advance Button again and hoUr will
appear in the Bottom Display. This is where the amount of hours is entered for
Compressor Run Time.
Enter the amount of hours that is desired by pressing the UP and DOWN Arrow Button
and then push the Advance Button. Min will appear in the Bottom Display. Enter the
amount of minutes desired by pressing the UP and DOWN Arrow Button and push the
Advance Button. SEC will appear in the Bottom Display. Enter the amount of seconds
desired by pressing the UP and DOWN Arrow Button and then push the Infinite Button.
(P1 will appear in the Bottom Display and 1 in the Top Display.) Use the Up Arrow
Button and change the 1 to 2. Push the Advance Button and SoAh will appear in the Top
Display and StyP in the Bottom Display. Push the Advance Button again and hoUr will
appear in the Bottom Display. (This is where the Compressor Off Time is selected.)
Repeat the process from above to set the Compressor Off Time and then push the
Infinite Button repeatedly to get back to Home Page. To start program, push the EZ
Button. The Watlow EZ Zone PM Control is capable of numerous individual types of
profiles. Refer to Watlow EZ-Zone PM Manual for further detailed information or call
Tech Support on the front cover.
6.2
Cleaning: Clean the incubator with a mild soap and water solution, rinse clean with water and
wipe dry with a soft cloth.
6.3
Disinfecting: Disinfect the incubator on a regular basis. Remove all of the interior parts and
clean thoroughly, including all corners using a suitable disinfectant that is appropriate for your
application. DO NOT use spray cleaners that might leak through openings and cracks and get on
electrical components, or that may contain solvents that will harm the coatings. DO NOT use
abrasives of any kind as they will damage the interior. Special care should be taken when
cleaning around sensing heads to prevent damage and around the door gasket so as not to
impair the positive seal.
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
6.4
Compressor Compartment: Located on top of unit behind the Control Panel. The Condensing
Unit should be cleaned every six (6) months to ensure proper refrigeration efficiency. Power
should be disconnected when performing this procedure.
6.5
Electrical Components: There is no maintenance to electrical components. If the unit fails to
operate correctly, refer to Troubleshooting Section or call Tech Support on front cover.
11
7
Section
TROUBLESHOOTING
When troubleshooting, always make a visual inspection of the incubator and control
console to find loose or disconnected wires which may be source of the trouble. In the
event the incubator does not operate properly, check the following before calling for
service.
PROBLEM
Temperature Higher
Than Set Point
POSSIBLE CAUSE
POSSIBLE SOLUTION
1. Unit in Defrost Mode.
1. Set to Normal Operating Mode (see
Manual Defrost)
2. Compressor Not Running.
2. Check #1, then check if compressor is
plugged into Control Box.
3. Unit Iced Up.
3. Perform a Manual Defrost Procedure.
Temperature Lower
Than Set Point
1. Over Temperature Set Too
Low.
1. Set Over Temperature Thermostat
Temperature
Unstable
1. Unit Iced Up
1. Perform a Manual Defrost Procedure.
2. Blockage of Airflow.
2. Allow Air Space In and Around Load.
3. Erratic Changes in Ambient
Conditions
3. Make Sure Unit is Not Near Heat Vents
or Air Conditioning Vents.
1. Faulty Power Source
1. Check Power Source.
2. Tripped Circuit Breaker
2. Turn Power Off and Reset Circuit
Breaker. If it Trips Again, Call Tech
Support (on front cover).
Unit Will Not Turn On
Service
If none of the suggestions listed above in the Troubleshooting guide have solved the problem
Customer Service should be contacted for assistance.
Call 1-800-322-4897, and have the model number, serial number and voltage (listed on the date
plate on the side of the incubator) as your service representative will require it.
12
8
Section
PARTS LIST
Description
SRI27
(LI27)
115V
SRI27-2
(LI27-2)
220V
BOD Defrost Heater Tubular
Casters 4” w/break
Circuit Breaker
Condensate Vaporizer 115V
Control Thermostat CPR 80°C
Control Watlow PM EZ-Zone
Convenience Outlet
Defrost Relay
Evap Coil Assy Complete TXV
I/O (on/off) Switch
Limit Disc
Pilot Light, Green
Pilot Light, Red
Probe RTD
Shelf 29 3/8” x 24 ¾”
Shelf Clip
Solid State Relay
Transformer
2350576
9900627
1100500
9900622
1750862
1750833
6100525
7030536
9900609
7850532
1750834
4650554
4650553
6600520
9900624
9900625
7030533
N/A
2350576
9900627
1100500
9900622
1750862
1750833
6100531
7030536
9900609
7850532
1750834
4650554
4650553
6600520
9900624
9900625
7030533
8350521
13
UNIT SPECIFICATIONS
All Models
Shipping Weight
480 lbs
217.72 k
Net Weight
296 lbs
134.26 k
Exterior WxDxH (in)
Dimensions
37 x 41 x 78
37 x 41 x 83 (w/casters)
Exterior WxDxH (cm)
Dimensions
93.98 x 104.14 x 198.12
93.98 x 104.14 x 210.82 (w/casters)
Interior WxDxH (in)
Dimensions
Interior WxDxH (cm)
Dimensions
30 x 29 x 54
76.20 x 73.66 x 137.16
Capacity
27 cubic feet
.76 cubic meters
Capacity
540 bottles
Temperature Range
0C to 45C
Temperature
Uniformity
+1.0C at 20C
14
Wire Diagram
SRI27 (LI27)
120 Volt (9851087)
BL
K
WHT
CIRCUIT BREAKER
15A
LIGHTED POWER SWITCH
BL
K
WHT
INTERIO
R
FANS
BL
K
WHT
BL
K
COMPRESSOR
LOW LIMIT
BL
K
WHT
INTERIO
R
OUTLET
R1
5
BL
K
1
9
YE
L
WHT
RELAY
COMPRESSOR OUTLET
BL
K
CONDENSATE PAN OUTLET
JUMO
OTP
BL
K
OTP
RED
BL
K
1
4
RED
2
1
2
50°C
LIMIT
ORN
3+
WHT
HEATING
GREEN
WHT
4HEATER ELEMENTS
BL
K
22G
BLK
22G
RED
BL
K
X1
L3
W1
X3
98
99
Y1
J3
CF
WHT
L2
L4
CD
K2
K4
CE
T1
T2
B5
9851087
S1
S2
D6
5/13/09 dlr
rev 6/4/09 dlr
rev 9/12/11rmh
R1
R2
D5
WATLOW
PM
WHT
RTD
13
BLU
14
R1
RELA
Y
COIL
15
SRI27-2 (LI27-2)
230 Volt (9851174)
BL
K
WHT
CIRCUIT BREAKER
15A
LIGHTED POWER SWITCH
BL
K
WHT
BL
K
WHT
BL
K
WHT
INTERIO
R
FANS
BL
K
COMPRESSOR
LOW LIMIT
BL
K
WHT
R1
5
BL
K
1
9
YE
L
WHT
RELAY
COMPRESSOR OUTLET
BL
K
CONDENSATE PAN OUTLET
JUMO
OTP
BL
K
OTP
RED
BL
K
1
4
RED
2
1
2
50°C
LIMIT
ORN
3+
WHT
HEATING
GREEN
WHT
4HEATER ELEMENT
BL
K
22G
BLK
22G
RED
BL
K
9851174
Rev a 9/12/11 rmh
X1
L3
W1
X3
98
99
Y1
J3
CF
WHT
L2
L4
CD
K2
K4
CE
T1
T2
B5
S1
S2
D6
R1
R2
D5
WATLOW
PM
WHT
RTD
13
BLU
14
R1
RELA
Y
COIL
16