General Information ................................
General InformationGeneral Information
General Safety Information............................................................................................................................................................... 2
Unpacking Your Chiller...................................................................................................................................................................... 3
Regulatory and Compliance Testing................................................................................................................................................ 3
ols and Components ................................
ContrContr
ols and Componentsols and Components
Installation and Startup
Installation and Startup ................................
Installation and StartupInstallation and Startup
Site Requirements.............................................................................................................................................................................. 5
Ambient Temperature and Relative Humidity............................................................................................................................ 5
Process Piping................................................................................................................................................................................ 5
Closed System or Cooling Coil Setup............................................................................................................................................... 6
Process Coolant ............................................................................................................................................................................. 7
Electrical Power ............................................................................................................................................................................. 8
Starting Process Fluid Flow..........................................................................................................................................................8
Normal Operation
Normal Operation ................................
Normal OperationNormal Operation
Selecting the Temperature Unit (°C or °F) ..................................................................................................................................... 8
Displaying and Adjusting the Set Point........................................................................................................................................... 9
High Temperature Limit (H-##) ................................................................................................................................................... 9
Low Temperature Limit (L-##)....................................................................................................................................................10
Auto-Refrigeration Temperature (A ##)....................................................................................................................................10
Specific Heat (P.##) .....................................................................................................................................................................10
Temperature Calibration (C #.#).................................................................................................................................................. 11
Enabling/Disabling the Local Lockout (LLO) .................................................................................................................................. 11
Display, Error and Fault Messages
Display, Error and Fault Messages ................................
Display, Error and Fault MessagesDisplay, Error and Fault Messages
Routine Maintenance and Troubleshooting
Routine Maintenance and Troubleshooting ................................
Routine Maintenance and TroubleshootingRoutine Maintenance and Troubleshooting
Magnetic Drive Centrifugal Pump ................................................................................................................................................... 13
Condenser, Air Vents, and Reusable Filter....................................................................................................................................13
Temperature Calibration.................................................................................................................................................................. 13
Technical Information ................................
Technical InformationTechnical Information
Model LS51/LS53 60Hz Compact Chiller Specifications..............................................................................................................15
Model LS52 50Hz Compact Chiller Specifications .......................................................................................................................16
General Information & Specifications............................................................................................................................................. 17
RS232 Serial Communications (Optional)......................................................................................................................................18
The LS-Series Compact Chiller provides cooling power for demanding applications and serves as an
economical alternative to tap water cooling systems. It features a microprocessor-based controller, digital
temperature display (°C or °F), and simple operation and maintenance.
To optimize cooling efficiency and performance, this sophisticated Chiller also features a modulated
refrigeration system. As a result, temperature stability is greatly enhanced and compressor life extended.
The Chiller is equipped with either a magnetic drive centrifugal pump or a turbine pump. Wetted parts within
the recirculation system are brass, copper, stainless steel, EPDM rubber, Alcryn, nylon, PVC, and
polyethylene.
General Information
General Information
General InformationGeneral Information
General S
General Safety Information
General SGeneral S
When installed, operated, and maintained according to the directions in this manual and common safety
procedures, your Chiller should provide safe and reliable heat removal. Please ensure that all individuals
involved in the installation, operation, or maintenance of this unit read this manual thoroughly prior to working
with the unit.
afety Information
afety Informationafety Information
This symbol alerts you to wide range of potential dangers.
This symbol advises you of danger from electricity or electric shock.
This symbol marks information that is particularly important.
This symbol indicates alternating current.
These symbols on the Power Switch / Circuit Breaker indicate that they place the main power supply ON /
/
OFF.
This symbol on the Power Switch indicates that it places the unit in a standby mode. It DOES NOT fully
disconnect the unit from the power supply.
This symbol indicates a protective conductor terminal.
Read all instructions pertaining to safety, set
Read all instructions pertaining to safety, set----up, and operation.
Read all instructions pertaining to safety, setRead all instructions pertaining to safety, set
Proper operation and maintenance is the
Proper operation and maintenance is the user’s responsibility.
Proper operation and maintenance is the Proper operation and maintenance is the
up, and operation.
up, and operation. up, and operation.
user’s responsibility.
user’s responsibility.user’s responsibility.
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3
Safety Recommendations
Safety Recommendations
Safety RecommendationsSafety Recommendations
To prevent injury to personnel and/or damage to property, always follow your workplace’s safety procedures
when operating this equipment. You should also comply with the following safety recommendations:
• Always connect the power cord on this unit to a grounded (3-prong) power outlet. Make certain that the
outlet is the same voltage and frequency as your unit.
• Never operate the unit with a damaged power cord.
• Always turn the unit OFF and disconnect Mains power before performing any maintenance or service.
Unpacking Your Chiller
Unpacking Your Chiller
Unpacking Your ChillerUnpacking Your Chiller
Your Chiller is shipped in a special carton. Retain the carton and all packing materials until the unit is
completely assembled and working properly. Set up and run the unit immediately to confirm proper operation.
Beyond one week, your unit may be warranty repaired, but not replaced. If the unit is damaged or does not
operate properly, contact the transportation company, file a damage claim and contact the company where
your unit was purchased immediately.
CAUTION:
CAUTION: Keep unit upright when moving. Be sure to follow your company’s procedures and practices
CAUTION:CAUTION:
regarding the safe lifting and relocation of heavy objects.
Regulatory
Regulatory and Compliance Testing
RegulatoryRegulatory
and Compliance Testing
and Compliance Testing and Compliance Testing
CSA UL (60Hz units)
CSA UL (60Hz units)
CSA UL (60Hz units)CSA UL (60Hz units)
CAN/CSA C22.2 No. 61010-1-04 — Safety Requirements for Electrical Equipment for Measurement, Control
and Laboratory Use, Part I: General Requirements.
CAN/CSA C22.2 No. 61010-010-04 — Safety Requirements for Electrical Equipment for Measurement,
Control and Laboratory Use - Part 2-010: Particular Requirements for Laboratory Equipment for the Heating
of Materials.
UL Std No. 61010-1 — Electrical Equipment for Laboratory Use, Part I: General Requirements.
UL Std No. 61010A-2-010 — Electrical Equipment for Laboratory Use, Part 2: Particular Requirements for
Laboratory Equipment for the Heating of Materials.
The following items have been included with your Chiller:
• Operator’s Manual
• IEC Power Cord
• Two sets of Inlet/Outlet Adapters: 1/2 inch NPT to 1/2 inch hose barb;
1/2 inch NPT to 5/8 inch hose barb
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Controls and Components
Fluid Inlet
Fluid Outlet
IEC Power
RS-232
Reservoir Cap
Circuit Breaker /
Up & Down Arrow Buttons
Drain
Temperature
Temperature
Heating &
Set Button
On/Off Button
Fluid Level
Air Filter
Identification
Controls and Components
Controls and ComponentsControls and Components
Power Switch
Units LEDs
Cooling LEDs
Display
Compartment
Connection
Indicator
Connection
(optional; not
shown)
Label
NOTE:
NOTE: When controlling at the set point temperature, it is not uncommon for both the heating and cooling
NOTE:NOTE:
LEDs to be lit simultaneously.
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Installation and Startup
Installation and Startup
Installation and StartupInstallation and Startup
WARNING:
WARNING: Be sure all power is off before proceeding.
WARNING: WARNING:
Site Requirements
Site Requirements
Site RequirementsSite Requirements
Ambient Temperature and Relative Humidity
Ambient Temperature and Relative Humidity
Ambient Temperature and Relative HumidityAmbient Temperature and Relative Humidity
The Chiller is designed for indoor installation in ambient temperatures between 5° and 35°C (41° and 95°F);
relative humidity should not exceed 80% (non-condensing).
Location
Location
LocationLocation
The Chiller should be installed on a strong, level surface. It should be located as close to possible to the
process requiring cooling. It should not be installed closer than 1.4 meters (4 feet) to a heat-generating
source, such as heating pipes, boilers, etc. If possible, the Chiller should be located near a suitable drain to
prevent flooding in the event of leaks. Do not place it where corrosive fumes, excessive moisture, excessive
dust, or high room temperatures are present.
NOTE:
NOTE: The Chiller may be located at a level below that of the equipment being cooled. As long as
NOTE:NOTE:
the process remains closed, overflow will not occur when adding cooling fluid to the Chiller
reservoir.
Clearance
Clearance
ClearanceClearance
Adequate clearance should be allowed on the front, sides, top, and rear of the Chiller for access to
connections and components. The front and side vents of the Chiller must be a minimum of 21 cm (8 inches)
away from walls or vertical surfaces so air flow is not restricted.
Electrica
Electrical Power
ElectricaElectrica
An IEC power cord is provided with the Chiller. It should be attached to the receptacle on the rear of the
enclosure. Make sure that the power outlet used for the Chiller is properly grounded and matches the voltage
and frequency indicated on the identification label on the back of the Chiller.
To help prevent voltage drops, position the Chiller as close as possible to the power distribution panel. Avoid
voltage drops by using a properly grounded power outlet wired with 14 gauge or larger diameter wire.
The use of an extension cord is not recommended. However, if one is necessary, it must be properly grounded
and capable of handling the total wattage of the unit. The extension cord must not cause more than a 10%
drop in voltage to the Chiller.
l Power
l Power l Power
WA
WARNING:
RNING: DO NOT plug the Chiller into the electrical outlet until the unit is ready for Startup....
WAWA
RNING: RNING:
Optional RS232 Serial Output
Optional RS232 Serial Output
Optional RS232 Serial OutputOptional RS232 Serial Output
This option allows you to remotely control the Chiller and/or output temperature readings to an external
recorder or other auxiliary device. The maximum communications distance for Chillers equipped with the
RS232 option is 15 meters (50 feet). A 9-pin D-connector is provided on the rear of the instrument enclosure
for this connection. See the
Plumbing
Plumbing
Plumbing Plumbing
Process Piping
Process Piping
Process PipingProcess Piping
Technical Information
section for the RS232 serial communication protocol.
The Chiller has two internally threaded (0.5 inch ID NPT) fittings on the rear of the instrument housing for the
process fluid connections. Two sets of 90° barbed hose adapters (0.5 inch and 5/8 inch) are supplied with the
unit for connecting these fittings to the process piping.
To maintain a safe workplace and avoid leaks, special care should be taken when choosing hoses and
connectors for the Chiller. It is the user’s responsibility to ensure that the tubing and fittings connected to the
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6
Chiller are compatible with the fluid, temperature, and pressure being used.
• Pressure Ratings — Hoses should be able to withstand the largest pressure that they will encounter.
• Flexible Tubing — Avoid tubing that will expand and take up fluid volume when operating at the desired
pressure.
• Hose Diameter — Process piping/hosing with a diameter smaller than 0.5 inch ID can be used if desired.
However, keep in mind that using smaller diameter hosing increases pressure and reduces flow in the
circulating system and may result in a flow alarm. The minimum recommended tubing size is 3/8 inch ID.
• Couplings and Clamps — The use of screw-tightened hose clamps is necessary on all joints to insure
good, tight connections. Quick connectors are not recommended as they have the potential for
restricting flow rate.
Fluid Filter
Fluid Filter
Fluid FilterFluid Filter
If particulate matter may be present in the fluid, the installation of a 50 micron filter on the chiller inlet is
recommended.
50 micron fluid filter: Part number 510-519
Reservoir Drain
Reservoir Drain
Reservoir DrainReservoir Drain
A 0.5 inch NPT connection is provided for the reservoir’s gravity drain. It should be piped to a drain or
receptacle positioned below the bottom of the drain. If a receptacle is used, be sure it is of sufficient volume
to hold all the water in the reservoir, process, and process lines.
Closed System or Cooling Coil Setup
Closed System or Cooling Coil Setup
Closed System or Cooling Coil SetupClosed System or Cooling Coil Setup
Connect the Chiller’s inlet and outlet to the external apparatus with hoses or pipes. The direction of the flow
through the system can be controlled by the way the connections are made. Fluid is drawn into the Chiller
through the “Inlet” connection; fluid is pumped out of the Chiller through the “Outlet” connection.
NOTE:
NOTE: If the Chiller is connected to an external apparatus with a built-in shutoff, an external bypass loop
NOTE:NOTE:
assembly may be needed. This bypass assembly continues flow circulation to and from the pump even
though the main flow to the external apparatus has been blocked.
External bypass loop assembly: Part number 510-147
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Startup
Startup
StartupStartup
Process Coolant
Process Coolant
Process CoolantProcess Coolant
Suitable Fluids
WARNING:
WARNING: Only use fluids that will satisfy safety, health, and equipment compatibility requirements.
WARNING: WARNING:
Caustic, corrosive, or flammable fluids must never be used.
The Chiller is designed to accommodate a variety of coolant fluids (water, glycol mixtures, etc). For most
applications above 20°C (68°F), distilled water is satisfactory. For operation at or below 20°C (68°F), the
Chiller must be protected with an antifreeze solution. Ethylene glycol (laboratory grade) and distilled water in
a 50/50 mixture is satisfactory from +20° to -15°C (68° to 5°F). Select a fluid that is compatible with the
Chiller’s wetted parts (brass, stainless steel, polyethylene, EPDM rubber, and nylon).
WARNING:
WARNING: Do not use caustic, corrosive, or flammable fluids.
WARNING: WARNING:
WARNING:
WARNING: Operation below 20°C (68°F) requires antifreeze in the circulation fluid.
WARNING: WARNING:
To prevent algae growth in the system, shield tubing from light. Insulation around the tubing will suffice. Use
an algaecide in the cooling water to minimize algae growth.
WARNING:
WARNING: Do NOT use chlorine bleach as an algaecide.
WARNING:WARNING:
WAR
WARNING:
NING: Do not use the following fluids
WARWAR
NING: NING:
Do not use the following fluids
Do not use the following fluidsDo not use the following fluids
• Automotive antifreeze with additives**
• Hard tap water**
• Deionized water with a specific resistance > 1 meg ohm
• Any flammable fluids
• Concentrations of acids or bases
• Solutions with halides: chlorides, fluorides, bromides, iodides or sulfur
• Bleach (Sodium Hypochlorite)
• Solutions with chromates or chromium salts
• Glycerin
• Syltherm fluids
** At temperatures above 40°C, additives or mineral deposits can adhere to the heater. If deposits are allowed to
build up, the heater may overheat and fail. Higher temperatures and higher concentrations of additives can
hasten deposit build up.
Filling the Reservoir
Unscrew the reservoir cap and carefully fill the reservoir with fluid. Leave the cap off and add additional fluid
as instructed under Starting Process Fluid Flow, below.
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Electrical Power
Electrical Power
Electrical PowerElectrical Power
Plug the Chiller’s power cord into an appropriate electrical outlet.
Place the Circuit Breaker/Power Switch on the rear of the instrument enclosure in the “On” position. Three
decimal points will appear on the Temperature display.
Starting Process Fluid Flow
Starting Process Fluid Flow
Starting Process Fluid FlowStarting Process Fluid Flow
Press the Power Button on the front panel. The system startup sequence will begin and proceed as follows:
1. The pump will turn on and fluid will begin circulating through the system. The set point temperature
will appear briefly on the Temperature display; after a few seconds, it will be replaced by the actual
fluid temperature. Fifteen to 20 seconds after power up, the compressor will begin operating.
2. Check for leaks.
3. With the pump running, the reservoir’s fluid level will drop as the process and/or process cooling lines
fill with fluid.
4. Slowly add fluid to the reservoir until the liquid level as shown on the front panel fluid level gauge
remains stable at the “Full” mark.
5. Replace the reservoir cap.
IMPORTAN
IMPORTANT SPECIAL FEATURE:
IMPORTANIMPORTAN
System, which increases/decreases fan speed based on heat load. You will notice that the fan speed
changes during operation. This is particularly beneficial in an environment where low noise level is
desirable.
T SPECIAL FEATURE: This Chiller equipped with the WhisperCool™ Environmental Control
T SPECIAL FEATURE: T SPECIAL FEATURE:
Normal Operation
Normal Operation
Normal OperationNormal Operation
Selecting the Temperature Unit (°C or °F)
Selecting the Temperature Unit (°C or °F)
Selecting the Temperature Unit (°C or °F)Selecting the Temperature Unit (°C or °F)
The LEDs adjacent to the Temperature Display indicate the unit (°C or °F) in which temperature is displayed.
To change from °C to °F or vice versa, proceed as follows:
To change to °F — Place the Circuit Breaker/Power Switch on the rear of the instrument in the “Off”
position. Press and hold the Down arrow button while returning the Circuit Breaker/Power Switch to
the “On” position.
To change to °C — Place the Circuit Breaker/Power Switch on the rear of the instrument in the “Off”
position. Press and hold the Up arrow button while returning the Circuit Breaker/Power Switch to the
“On” position.
CAUTION:
CAUTION: User settings (except local lockout, baud rate, and calibration offset) return to the original
CAUTION: CAUTION:
factory defaults when the unit in which temperature is displayed is changed. The Chiller’s temperature set
point and various alarm settings should be reset to the desired values.
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Displaying and Adjusting the Set Point
Displaying and Adjusting the Set Point
Displaying and Adjusting the Set Point Displaying and Adjusting the Set Point
Press the Set button on the front panel. The current set point temperature will be displayed and the decimal
point at the bottom right of the display will flash, indicating the temperature can be changed.
Press the Up and Down arrow button to adjust the set point temperature. It may be set anywhere from -20° to
+60°C. The default set point is +10°C. The setting is accepted after either pressing the Set button a second
time or will be accepted automatically after a few seconds of inactivity.
IMPORTANT:
IMPORTANT: While it is possible to set a temperature set point outside the temperature ranges outlined
IMPORTANT: IMPORTANT:
above, the Chiller will not be able to control at that temperature reliably.
Setting Operational Para
Setting Operational Parameters
Setting Operational ParaSetting Operational Para
meters
meters meters
The Chiller’s temperature limits and other operational parameters are user-adjustable.
Accessing Operational Parameters Menu Items: You can access and scroll through the operational parameter
menu items by pressing and releasing the Up and Down arrow buttons simultaneously. The first menu item
that will appear on the display is the High Temperature Limit value (shown as an H followed by the present
setting; e.g.,
H-71). To scroll to the next menu item, press and release the Up and Down arrow buttons again.
Changing an Operational Parameter: When the operational parameter you wish to change appears, wait until
the decimal point on the right of the display flashes and then press the appropriate arrow button to change
the displayed value.
Accepting an Operational Parameter Value: To accept the displayed value and return to the main operational
display, either press the Set button or allow the display to timeout (approximately 15-20 seconds). To accept
the displayed value and advance to the next menu item, press the Up and Down arrow buttons simultaneously.
Menu Item
Menu Item**** Description
Menu ItemMenu Item
HHHH----71
71 High Temperature Limit Set Point 1° to 71°C (33° to 159°F) 71°C (159°F)
7171
LLLL----46
46 Low Temperature Limit Set Point -46° to -1°C (-50° to 31°F) -46°C (-50°F)
4646
A 30
A 30 Auto-Refrigeration Temperature
A 30A 30
P.80
P.80 Specific Heat of Fluid 0.10 to 2.00 0.8
P.80P.80
PC96
PC96 Communication Baud Rate x 100 24, 48, 96, 192 96
PC96PC96
C0.0
C0.0 Temperature Calibration 2.0º to -2.0ºC (2.0º to -2.0ºF) 0.0°C (0.0°F)
C0.0C0.0
Pd00
Pd00 Password For factory use only 00
Pd00Pd00
**** The values shown after the Menu Item in the above table indicate how these menu items will appear as set by the factory. The actual
numeric value(s) displayed will differ for any menu item(s) you change.
This menu item serves as a user adjustable high temperature limit. It limits how high the temperature set
point may be set as well as the highest process fluid temperature at which the Chiller will operate. When this
value is exceeded, the appropriate alarm or fault message will appear on the display (see
Error Messages
).
Display, Fault and
To change the high temperature limit value, press the Up or Down arrow button until the desired high limit
value is displayed on the temperature display.
To accept the displayed value and return to the main operational display, either press the Set button or allow
the display to timeout (approximately 15-20 seconds). To accept the displayed value and advance to the next
menu item, press the Up and Down arrow buttons simultaneously.
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10
Low Temperature Limit (L
Low Temperature Limit (L----##
Low Temperature Limit (LLow Temperature Limit (L
##))))
####
This menu item serves as a user adjustable low temperature limit. It limits how low the temperature set point
may be set as well as lowest process fluid temperature at which the Chiller will operate. When this value is
exceeded, the appropriate alarm or fault message will appear on the display (see
Messages
).
Display, Fault and Error
To change the low temperature limit value, press the Up or Down arrow button until the desired low limit value
is displayed on the temperature display.
To accept the displayed value and return to the main operational display, either press the Set button or allow
the display to timeout (approximately 15-20 seconds). To accept the displayed value and advance to the next
menu item, press the Up and Down arrow buttons simultaneously.
Auto
Auto----Refrigeration Temperature (A ##)
Refrigeration Temperature (A ##)
AutoAuto
Refrigeration Temperature (A ##)Refrigeration Temperature (A ##)
This menu item allows you to select the temperature at which refrigeration is activated. When the set point
exceeds the auto-refrigeration temperature by more than 1.0°C, the cooling and the fan are turned off.
To change the auto-refrigeration temperature, press the Up or Down arrow button until the desired autorefrigeration temperature is displayed on the temperature display.
To accept the displayed value and return to the main operational display, either press the Set button or allow
the display to timeout (approximately 15-20 seconds). To accept the displayed value and advance to the next
menu item, press the Up and Down arrow buttons simultaneously.
CAUTION:
CAUTION: This value is always displayed/set in °C.
CAUTION:CAUTION:
Specific Heat (P
Specific Heat (P....##
Specific Heat (PSpecific Heat (P
This menu item allows you to adjust chiller performance to the specific heat of the cooling fluid, thus
optimizing temperature control. It should be set to 0.80 for a 50% glycol / 50% water solution (the specific
heat value for water is 1.00).
To change the specific heat setting, press the Up or Down arrow button until the desired low limit value is
displayed on the temperature display.
To accept the displayed value and return to the main operational display, either press the Set button or allow
the display to timeout (approximately 15-20 seconds). To accept the displayed value and advance to the next
menu item, press the Up and Down arrow buttons simultaneously.
Communications Baud Rate
Communications Baud Rate (PC
Communications Baud RateCommunications Baud Rate
This menu item allows you to set the baud rate of the chiller to match the device to which it is connected. It is
functional only on Chillers equipped with the optional RS232 output.
To change the baud rate setting, press the Up or Down arrow button until the desired low limit value is
displayed on the temperature display.
To accept the displayed value and return to the main operational display, either press the Set button or allow
the display to timeout (approximately 15-20 seconds). To accept the displayed value and advance to the next
menu item, press the Up and Down arrow buttons simultaneously.
##))))
####
(PC##
##))))
(PC (PC
####
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11
Temperature
Temperature Calibration (C
Temperature Temperature
Calibration (C ####....####))))
Calibration (CCalibration (C
The Chiller’s temperature probe is accurate to ±0.25°C. Therefore, if the displayed temperature 15°C, the
actual temperature will be between 14.75°C and 15.25°C.
This menu item allows you to adjust the Chiller’s temperature reading to match that of a traceable standard or
another piece of equipment. It allows you to offset the displayed temperature value by as much as ±2.0°C
(±2.0°F).
To change the calibration offset value, press the Up or Down arrow button until the desired low limit value is
displayed on the temperature display.
To accept the displayed value and return to the main operational display, either press the Set button or allow
the display to timeout (approximately 15-20 seconds). To accept the displayed value and advance to the next
menu item, press the Up and Down arrow buttons simultaneously.
CAUTION:
CAUTION: Positive offsets are denoted with a blank space between C and the offset value (e.g., C 0.3);
CAUTION:CAUTION:
negative offsets are denoted with a minus sign between C and the offset value (C-0.3).
Password
Password (Pd00)
PasswordPassword
This menu item is reserved for factory use only.
Enabling/Disabling the Local Lockout
Enabling/Disabling the Local Lockout (LLO)
Enabling/Disabling the Local LockoutEnabling/Disabling the Local Lockout
This feature is used to prevent unauthorized or accidental changes to set point and other operational values.
When enabled, the temperature set point and operational parameters can be displayed, but not changed.
(Pd00)
(Pd00) (Pd00)
(LLO)
(LLO) (LLO)
To enable the local lockout, press and hold the Set button until LLO is displayed (approximately 5 seconds).
Once enabled, LLO will appear momentarily when the Set button is pressed to display the set point.
To disable the local lockout, press and hold the Set button until CAn appears, indicating that the local lockout
feature has been disabled.
CAUTION:
CAUTION: The Local Lockout feature does not prevent set point changes entered via the optional RS232
CAUTION:CAUTION:
interface.
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Display,
Display, Error
Display, Display,
Error and Fault
Error Error
and Fault Messages
and Fault and Fault
Messages
MessagesMessages
When certain conditions are detected, message codes flash on the display. Depending on the nature of the
condition, power to various systems components is removed. When the condition is rectified, press the front
panel Power button or turn power switch/circuit breaker Off then On to clear the fault or error.
Message Code
Message Code Description
Message CodeMessage Code
EHL
EHL
EHLEHL
EEEE----HI
HI
HIHI
FHL
FHL
FHLFHL
ELL
ELL
ELLELL
EEEE----LO
LO
LOLO
ELL
ELL
ELLELL
EFL
EFL
EFLEFL
FFL
FFL
FFLFFL
Ft3
Ft3
Ft3Ft3
FOt
FOt
FOtFOt
Ft5
Ft5
Ft5Ft5
Ft7
Ft7
Ft7Ft7
Description Ac
DescriptionDescription
Error — The set point temperature has been set higher than the high limit temperature.
Error High
Limit
Fault High
Limit
Error Low
Limit
Fault Low
Limit
Fluid Low
Error
Fluid Flow
Fault
Fault 3
Fault OTP
Fault 5
Temperature
Probe Fault
Chiller Operation — Chiller continues normal operation; display alternates between EHL, E-HI
and the fluid temperature.
Action — Decrease set point temperature or increase high limit temperature.
Fault — The fluid temperature has exceeded the high limit temperature for more than 25
seconds.
Chiller Operation — Normal operation stops, with heating and cooling turned off and the pump
remaining on. FHL displayed continuously.
Action — Correct high fluid temperature problem or increase high limit temperature.
Error — The set point temperature has been set lower than the low limit temperature.
Chiller Operation — Chiller continues normal operation; display alternates between ELL, E-LO
and the fluid temperature.
Action — Increase set point temperature or decrease low limit temperature.
Fault — The fluid temperature has been below the low limit temperature for more than 25
seconds.
Chiller Operation — Normal operation stops, with heating and cooling turned off and the pump
remaining on. ELL displayed continuously.
Action — Correct low fluid temperature problem or decrease low limit temperature.
Error — Fluid flow is low.
Chiller Operation — Chiller continues normal operation; display alternates between EFL and the
fluid temperature.
Action — Add fluid to reservoir; check lines for restrictions.
Fault — The fluid flow has been low for more than 20 seconds.
Chiller Operation — Normal operation stops, with heating, cooling, and pump turned off. FFL
displayed continuously.
Action — Add fluid to reservoir; check lines for restrictions.
Fault — One or all instrument settings are out of range.
Chiller Operation — Normal operation stops, with heating, cooling, and pump turned off. Ft3
displayed continuously.
Action — Contact manufacturer
Fault — Heater over-temperature fault.
Chiller Operation — Normal operation stops, with heating, cooling, and pump turned off. FOt
displayed continuously.
Action — Contact manufacturer.
Fault — Heater Triac failure.
Chiller Operation — Normal operation stops, with heating, cooling, and pump turned off. Ft5
displayed continuously.
Action — Contact manufacturer.
Fault — The main temperature probe has failed.
Chiller Operation — Normal operation stops, with heating, cooling, and pump turned off. Ft7
displayed continuously.
Action — Contact manufacturer.
Action Required
tion Required
AcAc
tion Requiredtion Required
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Routine Maintenance and Troubleshooting
Filter compartment
Washable
Routine Maintenance and Troubleshooting
Routine Maintenance and TroubleshootingRoutine Maintenance and Troubleshooting
The Chiller is designed to require a minimum of periodic maintenance.
Magnetic Drive Centrifugal Pump
Magnetic Drive Centrifugal Pump
Magnetic Drive Centrifugal PumpMagnetic Drive Centrifugal Pump
When used under continuous operating conditions, this pump should be oiled every six (6) months with SAE
20 oil. The pump incorporates two oil ports for this purpose.
To access the pump:
1. Turn both power switches off and unplug the power cord.
2. Remove the two screws securing the left side panel (as viewed from the front) of the housing to the
frame.
NOTE:
NOTE: If your Chiller is equipped with a turbine pump, no pump maintenance is required.
NOTE:NOTE:
Condenser, Air Vents, and Reusable F
Condenser, Air Vents, and Reusable Filter
Condenser, Air Vents, and Reusable FCondenser, Air Vents, and Reusable F
To keep the system operating at optimum cooling capacity, the condenser, the air vents, and reusable filter
should be kept free of dust and dirt. They should be checked on a scheduled basis and cleaned as required.
To access the air filter, open the filter compartment door by placing your index finders in the cutouts on the
sides of the compartment door (upper corners) and pulling towards you.
Remove the filter and remove accumulated dust and dirt. It may be cleaned by either vacuuming, blowing out
with a clean air source, and/or washing with a mild detergent and water solution. If using a detergent/water
solution, be sure to rinse and dry thoroughly before reinstalling.
ilter
ilterilter
door access cutouts
(both sides of
compartment door)
Reusable air filter: Part number 750-758
Fluid Level
Fluid Level
Fluid LevelFluid Level
The fluid level gauge on the front panel of the Chiller should be periodically checked to determine if the fluid
level needs to be topped off. Generally, fluid should be added whenever the level in the reservoir is below the
“Full” mark.
Temperature Calibration
Temperature Calibration
Temperature Calibration Temperature Calibration
At times, there may be a minor temperature difference between the Chiller’s displayed temperature and the
actual temperature as determined by a certified temperature measurement device. There may also be
situations where you want the displayed temperature to match a particular value to have standardization
between different instruments. These adjustments can be performed using the Chiller’s temperature
calibration offset functions. See
Only mild detergents and water or an approved cleaner should be used on the painted surfaces of the Chiller.
Do not allow cleaning liquids or sprays to come in direct contact with the digital display.
Troubleshooting
Troubleshooting
TroubleshootingTroubleshooting
NO
NOTE:
TE: Many problems can be resolved by restoring the factory defaults. If this solves the problem, be
NONO
TE: TE:
careful when restoring your operational settings in order not to repeat the problem.
To restore the factory default settings:
1. Place the Power Switch/Circuit Breaker on the rear of the unit in the OFF position.
2. Press and hold either the Up (for °C) or Down (for °F) arrow button while returning the Circuit
Breaker/Power Switch to the On position.
WARNING:
WARNING: Refer servicing to qualified service personnel.
WARNING:WARNING:
WARNING:
WARNING: When electrical power is On, dangerous voltages exist within chassis components. Use
WARNING:WARNING:
extreme care when measuring voltages on live circuits.
Problem
Problem Possible Causes
ProblemProblem
Unit does not run
(digital displays blank)
Unit does not run
(three decimal points appear on
temperature display, two decimal
points on pressure/flow rate display)
No fluid circulation Insufficient fluid in reservoir
Insufficient circulation Fluid viscosity too high
Unit does not cool or cooling is
insufficient
Display not responding
Numbers do not change; display
does not respond when Set or Arrow
buttons are pressed; incorrect
numerals or characters are
displayed; no large numbers or
characters displayed on readout)
Possible Causes Corrective Action
Possible CausesPossible Causes
No power to unit
Unit in Standby mode Press Power Button on front panel.
Blockage in circulating system
Pump is not operating
External tubing diameter too
small
Restrictions in fluid lines
Low line voltage
Dust build up on air filter or
condenser
Blocked air ventilation screens
Excessive heat load
Ambient air temperature too
high
Low or high line voltage
Electronics malfunction Reset factory defaults. If problem persists, contact
Corrective Action
Corrective ActionCorrective Action
Check that the electrical cord is secure and connected to
an operating electrical outlet.
Check that Circuit Breaker / Power Switch on rear of unit
is On.
Add fluid to reservoir.
Remove blockage.
Replace pump.
Replace with lower viscosity fluid.
Replace with larger diameter tubing.
Check and correct as required.
Check and correct as required.
Clean air filter and/or condenser as required.
Remove blockages as required.
Check that heat load does not exceed capacity of chiller;
correct as required.
Decrease ambient air temperature.
Check and correct as required.
factory.
110-445
15
Technical Information
Centrifugal Pump
Turbine Pump
Model LS51/LS53 60Hz Compact Chiller Specifications
Model LS51/LS53 60Hz Compact Chiller Specifications
Maximum Pressure 14.5 psi / 0.99 bar 9 psi / 0.62 bar 43.4 psi / 2.99 bar
Maximum Head 10.2 m / 33.5 ft H2O 5.6 m / 18.5 ft H2O 26.75 m / 87.8 ft H2O
1
888
1622
2561
3859
4406
4986
5498
Fluid Temperature - °C
MX ---- Centrifugal
Centrifugal M1
MX MX
Centrifugal Centrifugal
-20° to +40°C / -4° to +104°F
230
435
680
1030
1160
1380
1550
M1 ---- Centrifugal
Centrifugal TX
M1 M1
Centrifugal Centrifugal
785
1486
2322
3518
3962
4713
5294
-20°C
-10°C
0°C
+10°C
+20°C
+30°C
+40°C
Watts BTU/Hr
150
345
540
790
900
1020
1140
TX ---- Turbine
Turbine
TX TX
Turbine Turbine
512
1178
1844
2698
3074
3483
3893
Specifications are subject to change. Performance data based on 120V or 230V, 60hz input power, 20°C ambient temperature and a 50/50 mix of Ethylene Glycol and distilled water as
coolant.
110-445
40
TX
35
30
25
MX
20
Pressure - psi
15
10
M1
5
051015
Flow - lpm
280
240
200
160
120
80
40
0
Pressure - kPa
16
Model LS52 50Hz Compact
Model LS52 50Hz Compact Chiller Specifications
Model LS52 50Hz CompactModel LS52 50Hz Compact
Performance 240V, 50Hz
Performance 240V, 50Hz
Performance 240V, 50HzPerformance 240V, 50Hz
Working temperature range
Chiller Specifications
Chiller Specifications Chiller Specifications
1
-20° to +40°C / -4° to +104°F
Operating temperature range 2 -20° to +60°C / -4° to +140°F
Temperature Stability ±0.1°C (±0.18°F)
Cooling capacity: Ethylene Glycol & Water (50/50 mix)
Pump M2 Centrifugal MY Centrifugal TY Turbine
@ Watts BTU/Hr Watts BTU/Hr @ Watts BTU/Hr
-20°C
-10°C
0°C
+10°C
+20°C
+30°C
+40°C
1. The temperature that the chiller can reach without an external heating or cooling source.
2. The temperature range in which the chiller can control temperature, limited by electronics.
230
435
680
1030
1160
1380
1545
1800
1600
1400
1200
1000
Cooling Capacity - Watts
785
1485
2322
3518
3962
4713
5276
800
600
400
200
0
-20-10010203040
240
460
700
1070
1190
1420
1580
Fluid Temperature - °C
820
1571
2391
3996
4064
4850
5396
Centrifugal Pump
Turbine Pump
-20°C
-10°C
0°C
+10°C
+20°C
+30°C
+40°C
140
330
500
750
830
990
1105
478
1127
1708
2561
2835
3381
3774
Pump option M2 - Centrifugal MY - Centrifugal TY - Turbine
Maximum Pressure 5.5 psi / 0.38 bar 10.5 psi / 0.72 mbar 32 psi / 2.2 bar
Maximum Head 4 m / 12.8 ft H2O 7 m / 23 ft H2O 17 m / 56.5 ft H2O
Specifications are subject to change. Performance data based on 240V, 50hz input power, 20°C ambient temperature and a 50/50 mix of Ethylene Glycol and distilled water as coolant.
25
23
21
19
17
15
13
Pressu re - p si
11
9
7
5
051015
TY
MY
M2
Flow - lpm
180
160
140
120
100
80
60
40
20
Pressure - kPa
110-445
17
General Information & Specifications
General Information & Specifications
General Information & SpecificationsGeneral Information & Specifications
Safety
Safety
SafetySafety
Auto-restart on power failure Yes
Low flow alarm and power cutoff Yes
High temperature safety Yes
High temperature limit Yes (user adjustable)
Low temperature limit Yes (user adjustable)
Compliance
Compliance
ComplianceCompliance
CSA-US Yes
CE Yes
WEEE Compliant
RoHS Compliant
Construction
Construction
ConstructionConstruction
Outer case Epoxy powder coated steel
Wetted parts
Unit dimensions (L x W x H) 60.7 x 25.4 x 48.3 cm / 23.9 x 10 x 19 in.
Recommended fluid(s) 50/50 mix of distilled water and ethylene glycol
Incompatible fluids
Ambient temperature operating range 5° to 35°C / 41° to 95°F
Maximum relative humidity 80% non-condensing
Operating power requirements
Fluid inlet/outlet 0.5 inch female brass NPT
Recommended tubing I.D. 0.375 inch / 9.5 mm (minimum)
Specifications subject to change without notice.
Environmental Conditions Indoor use only
Maximum Altitude: 2000 meter
Operating Ambient: 5° to 35°C (41° to 95°F)
Relative Humidity: 80%, non-condensing
Installation Category: II
Pollution Degree: 2
This option allows you to remotely control the Chiller and/or output temperature readings to an external
recorder or other auxiliary device. The maximum communications distance for Chillers equipped with the
RS232 option is 15 meters (50 feet).
Serial Connector — A 9-pin D-connector is provided on the back panel of the Chiller for RS232 data
communication. A serial cable that uses only the following pins should be used to connect the Chiller to the
computer:
Pin #2 — data read (data from computer)
Pin #3 — data transmit (data to computer)
Pin #5 — Signal ground
RS232 Protocol — The Controller uses the following RS232 protocol:
Data bits — 8
Parity — None
Stop bits — 1
Flow control — None
Baud rate — Selectable (Chiller and PC baud rates must match).
Communications Commands — Commands must be entered in the exact format shown. Do not send a [LF]
(line feed) after the [CR] (carriage return). Be sure to follow character case exactly. A response followed by
an exclamation point (!) indicates that a command was executed correctly. A question mark (?) indicates that
the Chiller could not execute the command (either because it was in an improper format or the values were
outside the allowable range). A response must be received from the Chiller before another command can be
sent. All responses are terminated with a single [CR].
Command Description
Command Description Command Format
Command DescriptionCommand Description
Set Command Echo SEi[CR]
Set On / Off SOi[CR]
Set Set Point SSxxx[CR] x = ASCII digit ![CR]
Read Set Point Temperature RS[CR]
Read Temperature RT[CR]
Read Temperature Units RU[CR] C or F
Read Status RW[CR]
Read Compressor Discharge Temperature (°C) RUT[CR]
Read fault status
Read Evaporator Inlet Temperature (°C) REI[CR] xxx.x[CR]
Read Evaporator outlet temperature (°C) REO[CR] xxx.x[CR]
Output continuous data stream, one set per second
Set on/off
Command Format Values
Command FormatCommand Format
RF[CR]
RDi[CR]
Values Return Message
ValuesValues
Echo: i = 1
No Echo: i = 0
i = 1 to turn on
i = 0 to turn off
1 = Run
0 = Standby
00 = System OK
Faults
i = 1 to turn on
i = 0 to turn off
Return Message
Return MessageReturn Message
![CR]
![CR]
+xx.x[CR] or
-xx.x[CR]
+xx.x[CR] or
-xx.x[CR]]
C[CR] or F[CR]
1[CR] or 0[CR]
xxx.x[CR]
![CR]
![CR]
RD command results in a continuous data stream. Headers are:
Min.sec, software version, temperature units, temperature setpoint, fluid temperature, remote probe
temperature, not used, compressor discharge temperature, evaporator inlet temperature, evaporator outlet
temperature, heat %, cool %, fan %. Temperatures are always in degrees Celsius.
This equipment is marked with the crossed out wheeled bin symbol to indicate it is covered by the Waste
Electrical and Electronic Equipment (WEEE) Directive and is not to be disposed of as unsorted municipal
waste. Any products marked with this symbol must be collected separately, according to the regulatory
guidelines in your area.
guidelines in your area.
guidelines in your area.guidelines in your area.
It is your responsibility to correctly dispose of this equipment at lifecycle-end by handing it over to an
authorized facility for separate collection and recycling. It is also your responsibility to decontaminate the
equipment in case of biological, chemical and/or radiological contamination, so as to protect the persons
involved in the disposal and recycling of the equipment from health hazards. By doing so, you will help to
conserve natural and environmental resources and you will ensure that your equipment is recycled in a
manner that protects human health.
Requirements for waste collection, reuse, recycling, and recovery programs vary by regulatory authority at
your location. Contact your local responsible body (e.g., your laboratory manager) or authorized
representative for information regarding applicable disposal regulations.
Any products marked with this symbol must be collected separately, according to the regulatory
Any products marked with this symbol must be collected separately, according to the regulatory Any products marked with this symbol must be collected separately, according to the regulatory
Service and Technical Support
Service and Technical Support
Service and Technical SupportService and Technical Support
If you have followed the troubleshooting steps and your Recirculating Chiller fails to operate properly, contact
the supplier from whom the unit was purchased. Have the following information available for the customer
service person:
• Model, Serial Number, and Voltage (from back panel)
• Date of purchase and your purchase order number
• Suppliers' order number or invoice number
• A summary of your problem
110-445
20
Replacement Parts and Accessories
Replacement Parts and Accessories
Replacement Parts and AccessoriesReplacement Parts and Accessories
The manufacturer agrees to correct for the original user of the product, either by repair (using new or
refurbished parts), or at the manufacturer’s election, by replacement (with a new or refurbished product), any
defects in material or workmanship which develop during the warranty period. The standard warranty is
twenty-four (24) months after delivery of the product. In the event of replacement, the replacement unit will
be warranted for the remainder of the original warranty period or ninety (90) days, whichever is longer. For
purposes of this limited warranty, “refurbished” means a product or part that has been returned to its original
specifications. In the event of a defect, these are your exclusive remedies.
If the product should require service, contact the manufacturer’s/supplier’s office for instructions. When
return of the product is necessary, a return authorization number is assigned and the product should be
shipped, transportation charges pre-paid, in either its original packaging or packaging affording an equal
degree of protection to the indicated service center. To insure prompt handling, the return authorization
number must be placed on the outside of the package. A detailed explanation of the defect should be enclosed
with the item.
The warranty shall not apply if the defect or malfunction was caused by accident, neglect, unreasonable use,
improper service, acts of God, modification by any party other than the manufacturer, or other causes not
arising out of defects in material or workmanship.
1 gal / 4.5 liter
1 gal / 4.5 liter
Five 0.5 gal / 2.27 liter bottles 004-300060
060320
060330
EXCLUSION OF IMPLIED WARRANTIES.
EXCLUSION OF IMPLIED WARRANTIES. THERE ARE NO WARRANTIES, EXPRESSED OR IMPLIED,
EXCLUSION OF IMPLIED WARRANTIES.EXCLUSION OF IMPLIED WARRANTIES.
INCLUDING, BUT NOT LIMITED TO, THOSE OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE WHICH EXTEND BEYOND THE DESCRIPTION AND PERIOD AS STATED IN THE OPERATOR’S
MANUAL INCLUDED WITH EACH PRODUCT.
LIMITATION ON DAMAGES.
LIMITATION ON DAMAGES. THE MANUFACTURER’S SOLE OBLIGATION UNDER THE WARRANTY IS LIMITED
LIMITATION ON DAMAGES.LIMITATION ON DAMAGES.
TO THE REPAIR OR REPLACEMENT OF A DEFECTIVE PRODUCT AND THE MANUFACTURER SHALL NOT, IN
ANY EVENT, BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES OF ANY KIND RESULTING
FROM USE OR POSSESSION OF THIS PRODUCT.
Some states do not allow: (A) limitations on how long an implied warranty lasts; or (B) the exclusion or
limitation of incidental or consequential damages, so the above limitations or exclusions may not apply to you.
This warranty gives you specific legal rights and you may have other rights that vary from state to state.
PolyScience
6600 W. Touhy Avenue Niles, IL 60714 U.S.A.
1-800-229-7569 1-847-647-0611
www.polyscience.com
110-445
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