Bibby Sterilin Stuart SRC14 User manual

Recirculating Cooler
SRC14
Instructions for use
Version 2.0

Castor
(
with Sto
pp
er
)
Drain with sto
pp
er
Maintenance
p
anel
Control
p
anel
Circulation tank
Coolin
g
coil
Inlet nozzle
Outlet nozzle
Tank cover
Flow control valve
90o Elbow
Recirculating Cooler
SRC14
Instructions for use
Introduction
Thank you for purchasing this piece of Stuart equipment.
To get the best performance from the equipment and for
your own safety, please read these instructions carefully
before use. Before discarding the packaging check that
all parts are present and correct.
This equipment is designed to operate under the
following conditions:
• For indoor use only
• Use in a well ventilated area
• Ambient temperature range +5ºC to +35ºC
• Altitude to 2000m
• Relative humidity not exceeding 80%
• Mains supply fluctuation not exceeding 10%
• Over-voltage category II IEC60364-4-443
• Pollution degree 2
If the equipment is not used in the manner described
in this manual and with accessories other than those
recommended by Stuart, the protection provided may
be impaired.
Electrical Installation
THIS EQUIPMENT MUST BE EARTHED
Before connection please ensure that the line
supply corresponds to that shown on the rating
plate. This model requires a supply rated at 220 -
240V, 50 Hz, ~, single phase.
Model Supply requirements Power
SRC14 230V, 50 Hz, 1.1kW
There is an IEC socket at the rear of the instrument for
connection to the mains supply. The unit is supplied with
two mains leads fitted with IEC plugs for connection
to the instrument. One has a UK 3 pin plug and the
other has a 2 pin “Shuko” plug for connection to the
mains. Choose the lead appropriate for your electrical
installation and discard the other. Should neither lead
be suitable, take the lead with the UK plug and replace
the plug with a suitable alternative. See the enclosed
instruction sheet for advice on how to carry out this
procedure. Should the mains lead require replacement a
cable of 1mm2 of harmonised code H05W-F connected
to an IEC 320 plug should be used.
THIS OPERATION SHOULD ONLY BE UNDERTAKEN
BY A QUALIFIED ELECTRICIAN
The appropriate mains lead should be connected
BEFORE connection to the mains supply.
Fig.1

General Description
The SRC14 accurately controls the temperature of
a cooling liquid between -20 to +30ºC. The cooled
liquid is then circulated to an external device via the
inlet and outlet nozzle. The SRC14 has a capacity of
14 litres.
Safety Advice Before Use
• Beware some cooling mediums are ignitable
above ambient temperatures, do not use with
hazardous materials or liquids.
• Never move or carry the unit when in use or
connected to the mains electricity supply.
• Please take care not to touch the cooling
elements under the air filter, as these can be
sharp.
• Do not place anything on top of the unit
during operation
Installation
Position your recirculating cooler on a firm level
surface. A byproduct of the air cooled refrigeration
unit is heat, unnecessary heat build up can lower
the cooling performance of the unit. To avoid
this please ensure the unit is located in a well
ventilated area. The unit should not be exposed
to direct sunlight, humidity, dust or vibration. For
optimum performance the following clearance
should be allowed: 20cm from both sides, 60cm
above the unit and 40cm behind. Do not obstruct
the front ventilation on either unit.
Care should be taken not to tilt the SRC14 by
more than 45 degrees when moving. Ensure that
the castors on the SRC14 are locked prior to use
(only the front 2 castors have stoppers).
Operation
Connection of hoses:
Connect the 90º elbows to the nozzles then
connect the elbow adapters including flow control
valve (Fig. 2) Connect suitable tubing (ID 9mm) to
each nozzle (inlet and outlet)
NOTE: Take care not to use excessive force
connecting the hoses, use universal clips or similar
to secure the tubing if necessary. Always consider
the temperature and pressure requirements before
selecting your tubing material. Use tubing of the
minimum length required, excessively long tubing
will reduce the efficiency of the unit.
Filling procedure:
When choosing your cooling medium you should
take care that there is no risk of corrosion of internal
parts, these include the following materials; copper,
stainless steel, brass, PTFE, polyacetal resin, silicone
rubber, polypropylene oxide and ethylene propylene
rubber. Distilled water should also be avoided as it
could dissolve metal substances in the circulation
line. For operation below +7ºC it is recommended
that ethylene glycol is used as your cooling medium.
Prior to filling the unit make sure that the drain
stopper is in place. Pour 14 litres of your cooling
medium into the circulation tank, or until the liquid
level is approximately 2 cm from the top of the tank,
take care not to overfill. Replace the circulation tank
cover.
Operation
Connect the power lead to the IEC connector at the
back of the unit. Make sure that the power switch
and pump switch are in the off position on the
control panel (Fig. 3) then connect the power cable
to the mains supply. Turn the power switch on the
main control panel to the on position. The display
will show the current temperature of the cooling
medium. The refrigeration unit will automatically
start if the current temperature is 0.5ºC higher than
the set temperature (the temperature is set to 20ºC
before shipment). The refrigerator must be switched
on manually using the switch on the control panel,
once on, it will automatically cut in and out to
control the temperature of the cooling medium.
Fig.2

SRC14
Cooling liquid
filter
Senso
r
Setting the temperature:
To set the temperature of the cooling medium press
the SET key once, the display will change from
the current temperature to the set temperature
(blinking) use the up and down keys to reach your
desired value, hold down either key to scroll the
temperature. After reaching the desired value
press the set key again, the display will revert to
the current temperature. If the SET key is pressed
once and no other key is pressed for five seconds
the display will automatically revert to the current
temperature. The set temperature is retained in the
memory when mains power is switched off. The
refrigerator must be switched on manually using
the switch on the control panel, once on it will
automatically cut in and out to control, the
temperature of the cooling medium.
Adjustment of flow rate:
Use the flow rate valve on the outlet nozzle to adjust the
flow rate. Operation of the pump with this valve close
could damage the pump. Take care when opening this
valve; opening the valve too quickly could cause damage
to the tubing or glassware in the circulation line.
Calibration of display temperature:
For normal operation it is not usually necessary to
calibrate the temperature. Measure the temperature of
the cooling liquid using a thermometer. Press the set
key for more than 5 seconds. “Pb” will be displayed.
Using the up and down key to select the correct value as
measured on the thermometer (calibration can only be
performed between +9.9ºC and -9.9ºC). After setting
the correct value press the set key for more than 5
seconds, the display will return to the current measured
temperature.
After operation:
Switch the circulation pump off, then switch off the
power switch and the mains power. Place an appropriate
collection vessel for the cooling medium underneath the
drain hose and the drain stopper. Once all fluid has been
drained replace the drain stopper.
Maintenance & Servicing
WARNING: Ensure the unit is disconnected from the
mains electricity supply before attempting maintenance
or servicing.
Cleaning the refrigeration air filter:
If the refrigeration air filter blocks it can affect the
efficiency of the unit. Periodically this filter should be
checked and cleaned. Disconnect the unit from the
mains power supply. The front panel is removable: press
on the two black squares in the top corners of the front
panel and the panel will open. Remove the filter (fig 4).
Be careful not to touch the cooling elements as these
can be sharp. Shake the dust out of the filter and wash
with mild detergent if necessary.
Allow the filter to air dry before replacement.
Cleaning of the cooling liquid filter:
The cooling liquid filter is located at the bottom of the
circulation tank (fig 5). Drain the tank then remove the
filter, it should easily pull free. Clean and replace.
Fig.3
A
ir filter
Fig.4
Fig.5

General Maintenance
Periodically wipe clean the inside of the circulation
tank and locate the fuse box at the rear of the unit
(Fig. 6). Use mild detergent if necessary. Regularly
check connections for leakage. The condition of the
o-ring in the inlet and outlet nozzle should be checked
periodically and replaced if necessary.
At high temperatures or high humidity water can collect
in the cooling system of the SRC14, this should be
drained periodically via the hose located at the back of
the unit. To change the fuse on the SRC14, switch off
the mains power. Insert a small screwdriver into the slot
and push downwards, as shown in Fig. 7.
Any repairs or replacement of parts MUST be
undertaken by suitably qualified personnel.
For a comprehensive list of parts required by service
engineers conducting internal repairs and a service
manual, please contact the Technical Service Department
of Bibby Scientific Ltd. quoting both the model and serial
number. Only spare parts supplied or specified by Bibby
Scientific Ltd. or its agents should be used. Fitting of
non-approved parts may affect the performance and
safety features designed into the instrument. If in any
doubt, please contact the Technical Service Department
of Bibby Scientific Ltd. or the point of sale.
To open fusebox insert
a small screwdriver into
the slot and push
downwards
Drainage hose
Fuse box
AC outlet
To open fusebox insert
a small screwdriver into
the slot and push
downwards
Drainage hose
Fuse box
AC outlet
Bibby Scientific Ltd.
Stone, Staffordshire ST15 0SA
United Kingdom
Tel: [phone]
Fax: [phone]
e-mail equipment@bibby-scientific.com
www.bibby-scientific.com
Warranty
Bibby Scientific Ltd warrants this instrument to be free
from defects in material and workmanship, when used
under normal laboratory conditions, for a period of three
(3) years. In the event of a justified claim Bibby Scientific
will replace any defective component or replace the unit
free of charge. This warranty does NOT apply if damage
is caused by fire, accident, misuse, neglect, incorrect
adjustment or repair, damage caused by incorrect
installation, adaptation, modification, fitting of non
approved parts or repair by unauthorised personnel.
Technical Specification
SRC14
Cooling capacity 1200W at 10ºC
Temperature range -20 to +30ºC
Control accuracy ±2ºC
Bath capacity 14 litres
Pump rate 18 litres / minute
Dimensions (w x d x h) 354 x 384 x 851mm
Net weight 41kg
Electrical supply 230V, 50Hz
Fig.6
Fig.7

Problem Cause Solution
Cooling liquid is not
circulated.
Cooling liquid filter is blocked.
Air is trapped in the pump.
Clean the filter – See the Maintenance and
Servicing section for details.
Briefly remove the drain stopper.
until all trapped air has been removed.
Flow pressure is
reduced.
Tubing is trapped.
Pressure loss due to excessive
tubing length.
The circulator is too low compared
to the device it is cooling.
Check the tubing isn’t pinched, twisted or trapped
Try to reduce the overall length of the tubing.
Adjust the position of the recirculating cooler.
No refrigeration of
cooling medium.
Refrigeration unit is broken.
The cooling medium isn’t sufficiently
covering the cooling coil.
Overload of refrigeration unit
(alarm led illuminates)
Contact your local service representative.
Top up the cooling medium.
Lower ambient temperature below
35ºC, or raise set temperature.
Display does not
illuminate when
power is on.
No mains power.
Circuit breaker has tripped.
Fuse has blown.
Temperature controller is broken.
Check mains power supply.
Unscrew maintenance panel and check
switchable circuit breaker is in the on position. If
problem persists there could be an electrical
leakage and you should contact your local service
representative.
Follow procedure to change fuse in the
Maintenance and services section
Contact local service representative
Cooling power is
poor.
Refrigeration unit does not work.
The ambient temperature exceeds 35ºC
Exhaust is blocked.
Refrigeration air filter is blocked
Contact local service representative.
Try to lower the ambient temperature.
Check necessary clearance around the unit has
been allowed.
Follow the procedure detailed in the Maintenance
and Servicing section to clean the filter.
Water freezes in the
circulation tank at
+7ºC
Loss of flow pressure Check flow pressure, see above
Use anti freeze for cooling medium.
Blinks on the display Temperature sensor malfunction
Measured temperature is lower
than the units lower limit (-50ºC)
Contact local service representative.
Blinks on the display,
refrigeration stops
Temperature sensor short circuit
Measured temperature exceeds the
upper limit of the unit (more than
+40ºC)
The heating load exceeds capacity, reduce load.
Display is abnormal or
unstable:
Electrical noise causes abnormal
display on temperature controller
Temperature controller is reset by
electrical noise
Ambient temperature exceeds 35ºC
Turn off mains power, wait 5 seconds then switch
back on.
Move unit to a new location.
Lower ambient temperature below 35ºC.
-FF
E R
---
Instructions for use
Note: Alarm is cleared by turning off the power switch

This product meets the applicable
EC harmonized standards for radio
frequency interference and may be
expected not to interfere with, or be affected
by, other equipment with similar qualifications.
We cannot be sure that other equipment
used in its vicinity will meet these standards
and so we cannot guarantee that interference
will not occur in practice. Where there is a
possibility that injury, damage or loss might occur
if equipment malfunctions due to radio frequency
interference, or for general advice before use,
contact the Technical Department of Bibby
Scientific Ltd.

Bibby Scientific Ltd
Beacon Road Stone
Staffordshire ST15 0SA
United Kingdom
Tel: [phone]
Fax: [phone]
e-mail: info@bibby-scientific.com
www.bibby-scientific.com
Bibby Scientific France SAS
ZI du Rocher Vert - BP 79
77793 Nemours Cedex
France
Tel: [phone]
Fax: [phone]
e-mail: bsf@bibby-scientific.fr
www.bibby-scientific.com
Bibby Scientific US Ltd
3 Terri Lane Suite 10
Burlington NJ 08016
USA
Tel: [phone]
Fax: [phone]
www.bibby-scientific.com
Bibby Scientific Italia Srl
Via Alcide de Gasperi 56
20077 Riozzo di Cerro al Lambro
Milano Italia
Tel: [phone]
Fax: [phone]
e-mail: marketing@bibby-scientific.it
www.bibby-scientific.it
Bibby Scientific (Asia) Ltd
Room 607 Yen Sheng Centre
64 Hoi Yuen Road Kwun Tong
Kowloon Hong Kong
Tel: [phone]
Fax: [phone]
e-mail bibby@bibby-scientificasia.com
www.bibby-scientificasia.com
INSPECTION REPORT
MODEL SRC14
ELECTRICAL SAFETY
1. Earth continuity
2. Insulation
3. Flash test
FUNCTIONAL
1. Indicators
2. Speed/temperature
3. Visual acceptance
QUALITY CONTROL INSPECTOR