General Information ................................
General InformationGeneral Information
General Safety Information............................................................................................................................................................. 2
Unpacking Your Chiller.................................................................................................................................................................... 3
Regulatory and Compliance Testing.............................................................................................................................................. 3
Controls and Components ................................
Controls and ComponentsControls and Components
Installation and Startup
Installation and Startup ................................
Installation and StartupInstallation and Startup
Site Requirements............................................................................................................................................................................ 5
Ambient Temperature and Relative Humidity.......................................................................................................................... 5
Process Piping.............................................................................................................................................................................. 6
Closed System or Cooling Coil Setup............................................................................................................................................. 6
Process Coolant............................................................................................................................................................................ 7
Starting Process Fluid Flow........................................................................................................................................................ 8
Normal Operation
Normal Operation ................................
Normal OperationNormal Operation
Selecting the Temperature Unit (°C or °F) ................................................................................................................................... 9
Displaying and Adjusting the Set Point......................................................................................................................................... 9
High Temperature Limit (H-##) ................................................................................................................................................10
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, Alarm and Error Messages
Display, Alarm and Error Messages ................................
Display, Alarm and Error MessagesDisplay, Alarm and Error Messages
Routine Maintenance and Troubleshooting
Routine Maintenance and Troubleshooting................................
Routine Maintenance and TroubleshootingRoutine Maintenance and Troubleshooting
Condenser, Air Vents and Reusable Filter ...............................................................................................................................13
Temperature Calibration............................................................................................................................................................ 13
Technical Information ................................
Technical InformationTechnical Information
Model LM61 60Hz Compact Chiller Specifications......................................................................................................................15
Model LM62 Hz Compact Chiller Specifications..........................................................................................................................16
Model MM71 60Hz Compact Chiller Specifications ..................................................................................................................... 17
Model MM72 50Hz Compact Chiller Specifications....................................................................................................................18
General Information & Specifications...........................................................................................................................................19
RS232 Serial Communication (Optional).....................................................................................................................................20
LM-Series and MM-Series Compact Chillers provide cooling power for demanding applications and serve as
economical alternatives to tap water cooling systems. They feature a microprocessor-based controller,
digital temperature display (°C or °F), and simple operation and maintenance.
To optimize cooling efficiency and performance, these sophisticated Chillers also feature a modulated
refrigeration system. As a result, temperature stability is greatly enhanced and compressor life extended.
LM-Series and MM-Series Chillers are equipped with a magnetic drive centrifugal 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 Safety Information
General Safety Information
General Safety InformationGeneral Safety Information
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.
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 user’s responsibi
Proper operation and maintenance is the user’s responsibility.
Proper operation and maintenance is the user’s responsibiProper operation and maintenance is the user’s responsibi
up, and operation.
up, and operation. up, and operation.
lity.
lity.lity.
110-471 3
Safety Recommendations
afety Recommendations
afety Recommendationsafety 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: ½ inch NPT to ½ inch hose barb;
½ inch NPT to 5/8 inch hose barb
110-471 4
Controls and C
Reservoir Cap
Up & Down
Temperature
Units LEDs
Heating &
Temperature
Set Button
Air Filter
Fluid Level
On/Off Button
dentification Label
IEC Power
Circuit Breaker /
Drain
Fluid Inlet
Fluid Outlet
RS232
Controls and Components
Controls and CControls and C
Cooling LEDs
Display
omponents
omponentsomponents
Arrow Buttons
Indicator
I
Connection
Power Switch
Compartment
Connection
(optional; not
shown)
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.
110-471 5
Installation and Startup
Installation and Startup
Installation and StartupInstallation and Startup
WARNING:
WARNING: Be sure all power is off before proceeding.
WARNING: WARNING:
SSSSite Requirements
ite Requirements
ite Requirementsite 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.
Electrical Power
Electrical Power
Electrical Power Electrical Power
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.
WARNING:
WARNING: DO NOT plug the Chiller into the electrical outlet until the unit is ready for Startup.
WARNING: WARNING:
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
Technical Information s
ection for the RS232 serial communication protocol.
110-471 6
Plumbing
Plumbing
Plumbing Plumbing
Process Piping
Process Piping
Process PipingProcess Piping
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 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
110-471 7
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, copper, stainless steel, EPDM rubber, Alcryn, nylon, PVC, and polyethylene).
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:
WARNING
WARNING:
WARNINGWARNING
: Do not use the following fluids
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.
110-471 8
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.
110-471 9
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) used for temperature displays. 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 of measure is changed. The Chiller’s temperature set point and various
alarm settings should be reset to the desired values.
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 should be set from -10° to +30°C
(LM) or -5° to +50°C (MM). 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.
CAUTION:
CAUTION: While it is possible to set a temperature set point outside the temperature ranges outlined
CAUTION: CAUTION:
above, the Chiller will not be able to control at that temperature reliably.
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 Item*Menu Item*
HHHH----71
71
7171
LLLL----46
46
4646
A 30
A 30
A 30A 30
P.80
P.80
P.80P.80
PC96
PC96
PC96PC96
C0.0
C0.0
C0.0C0.0
Pd00
Pd00
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.
Description Choices / Ranges /
DescriptionDescription
High Temperature Limit Set Point 1° to 71°C (33° to 159°F) 71°C (159°F)
Low Temperature Limit Set Point -46° to -1°C (-50° to 31°F) -46°C (-50°F)
Auto-Refrigeration Temperature
Specific Heat of Fluid 0.10 to 2.00 0.8
Communication Baud Rate x 100 24, 48, 96, 192 96
Temperature Calibration 2.0º to -2.0ºC (2.0º to -2.0ºF) 0.0°C (0.0°F)
Password For factory use only 00
Choices / Ranges / CCCComments
Choices / Ranges / Choices / Ranges /
20°C – 90°C
(always displayed/set in °C)
omments Default Setting
ommentsomments
Default Setting
Default SettingDefault Setting
30°C
110-471 10
High Temperature Limit (H
High Temperature Limit (H----##))))
High Temperature Limit (HHigh Temperature Limit (H
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.
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.
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.
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 (P.##)Specific 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.
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 baud rate 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.
110-471 11
Temperature Calibration (C #.#)
Temperature Calibration (C #.#)
Temperature Calibration (C #.#)Temperature Calibration (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.
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 (Pd00)
Password (Pd00)
Password (Pd00)Password (Pd00)
This menu item is reserved for factory use only.
Enabling/Disabling the Local Lockout (
Enabling/Disabling the Local Lockout (LLO)
Enabling/Disabling the Local Lockout (Enabling/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.
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
CAUTION:CAUTION:
RS232 interface.
110-471 12
Display, Alarm and Error Mess
Display, Alarm and Error Messages
Display, Alarm and Error MessDisplay, Alarm and Error Mess
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 condition is rectified, press the front
panel Power button or turn the power switch/circuit breaker Off then On to clear the fault or error.
Message
Message
Message Message
Code
Code
CodeCode
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
Description
DescriptionDescription
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
Error — The set point temperature has been set higher than the high limit
temperature.
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 the reservoir; check fluid lines for restrictions and correct
as required.
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 the reservoir; check fluid lines for restrictions and correct
as required.
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
Routine Maintenance and Troubleshooting Routine Maintenance and Troubleshooting
Routine Maintenance
Routine Maintenance
Routine MaintenanceRoutine Maintenance
The Chiller is designed to require a minimum of periodic maintenance.
Condenser, Air Vents, and Reusable Filter
Condenser, Air Vents, and Reusable Filter
Condenser, Air Vents, and Reusable Filter Condenser, Air Vents, and Reusable Filter
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.
access cutouts (both sides of
compartment door)
air filter
Reusable air filter
Fluid Level
Fluid Level
Fluid LevelFluid Level
Reusable air filter: Part number 750
Reusable air filterReusable air filter
: Part number 750----798
: Part number 750: Part number 750
798
798798
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
Normal Operation, Temperature Calibration (C #.#).
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.
110-471 14
Troubleshooting
Troubleshooting
TroubleshootingTroubleshooting
NOTE:
NOTE: Many problems can be resolved by restoring the factory defaults. If this solves the problem, be
NOTE: NOTE:
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 Power
Switch/Circuit Breaker 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 Corre
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
ctive Action
CorreCorre
ctive Actionctive Action
Check that the electrical cord is secure and connected
to an operating electrical outlet.
Check that Power Switch / Circuit Breaker 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.
110-471 15
Technical Information
Technical Information
Technical InformationTechnical Information
Model L
Model LMMMM66661111 60
Model LModel L
60HHHHz Compact Chiller Specifications
z Compact Chiller Specifications
60 60
z Compact Chiller Specificationsz Compact Chiller Specifications
Performance
Performance 120
PerformancePerformance
Working temperature range
Operating temperature range 2 -10° to +30°C / +14° to +86°F
Temperature Stability ±0.1°C (±0.18°F)
Cooling capacity Ethylene Glycol & Water (50/50 mix)
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.
120V,
V, 60Hz
120 120
V, V,
Centrifugal Pump - GX Centrifugal Pump - MX
@ Watts BTU/Hr @ Watts BTU/Hr
-10°C
0°C
+10°C
+20°C
+30°C
470
560
650
60Hz
60Hz60Hz
230
350
1
-10° to +30°C / +14° to +86°F
785
1194
1603
1910
2218
-10°C
0°C
+10°C
+20°C
+30°C
170
250
340
420
540
580
853
1160
1433
1842
Cooling Capacity (Watts)
Pump option
Pump option GX
Pump optionPump option
Maximum Flow 7.9 lpm / 2.1 gpm 13.2 lpm / 3.5 gpm
Maximum Pressure 5.1 psi / 0.35 bar 14.5 psi / 1.0 bar
Maximum Head 3.6 m / 11.8 ft H2O 10.2 m / 33.5 ft H2O
GX ---- Centrifugal
Centrifugal MX
GX GX
Centrifugal Centrifugal
MX ---- Centrifugal
Centrifugal
MX MX
Centrifugal Centrifugal
Pressure (psi)
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.
110-471 16
Model L
Model LM6
Model LModel L
M62222 50
50HHHHz Compact Chiller Specifications
M6M6
Performance 2
Performance 244440V, 5
Performance 2Performance 2
Working temperature range
Operating temperature range 2 -10° to +30°C / +14° to +86°F
Temperature Stability ±0.1°C (±0.18°F)
Cooling capacity Ethylene Glycol & Water (50/50 mix)
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.
z Compact Chiller Specifications
50 50
z Compact Chiller Specificationsz Compact Chiller Specifications
0V, 50Hz
0Hz
0V, 50V, 5
0Hz0Hz
1
Centrifugal Pump -- GY Centrifugal Pump -- MY
@ Watts BTU/Hr @ Watts BTU/Hr
-10°C
0°C
+10°C
+20°C
+30°C
140
250
390
520
600
1332
1774
2047
-10° to +30°C / +14° to +86°F
478
854
-10°C
0°C
+10°C
+20°C
+30°C
110
170
280
390
500
375
580
955
1330
1706
Cooling Capacity (Watts)
Pump option
Pump option GY
Pump optionPump option
Maximum Flow 6.8 lpm / 1.8 gpm 11.4 lpm / 3 gpm
Maximum Pressure 4.4 psi / 0.30 bar 12.5 psi / 0.9 bar
Maximum Head 3 m / 10 ft H2O 8.8 m / 28.8 ft H2O
GY ---- Centrifugal
Centrifugal MY
GY GY
Centrifugal Centrifugal
MY ---- Centrifugal
Centrifugal
MY MY
Centrifugal Centrifugal
Pressure (psi)
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.
110-471 17
Model MM
Model MM77771 60
Model MMModel MM
1 60Hz Compact Chiller Specifications
1 601 60
Performance 120V, 60Hz
Performance 120V, 60Hz
Performance 120V, 60HzPerformance 120V, 60Hz
Working temperature range
Operating temperature range 2 -5° to +50°C / +23° to +122°F
Temperature Stability ±0.1°C (±0.18°F)
Cooling capacity Ethylene Glycol & Water (50/50 mix)
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.
Maximum Pressure 5.1 psi / 0.35 bar 14.5 psi / 1.0 bar
Maximum Head 3.6 m / 11.8 ft H2O 10.2 m / 33.5 ft H2O
GX ---- Centrifugal
Centrifugal MX
GX GX
Centrifugal Centrifugal
MX ---- Centrifugal
Centrifugal
MX MX
Centrifugal Centrifugal
Pressure (psi)
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.
110-471 18
Model
Model MMMMMMMM77772 50Hz Compac
Model Model
2 50Hz Compact Chiller Specifications
2 50Hz Compac2 50Hz Compac
Performance 240V, 50Hz
Performance 240V, 50Hz
Performance 240V, 50HzPerformance 240V, 50Hz
Working temperature range
Operating temperature range 2 -5° to +50°C / +23° to +122°F
Temperature Stability ±0.1°C (±0.18°F)
Cooling capacity Ethylene Glycol & Water (50/50 mix)
Centrifugal Pump -- GY Centrifugal Pump -- MY
@ Watts BTU/Hr @ Watts BTU/Hr
-5°C
0°C
+10°C
+20°C
+30°C
+40°C
+50°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.
t Chiller Specifications
t Chiller Specificationst Chiller Specifications
1
115
190
290
410
440
470
495
-5° to +50°C / +23° to +122°F
392
648
989
1399
1503
1603
1689
-5°C
0°C
+10°C
+20°C
+30°C
+40°C
+50°C
105
175
270
390
420
450
480
358
596
921
1330
1434
1535
1637
Cooling Capacity (Watts)
Pump option
Pump option GY
Pump optionPump option
Maximum Flow 6.8 lpm / 1.8 gpm 11.4 lpm / 3 gpm
Maximum Pressure 4.4 psi / 0.30 bar 12.5 psi / 0.9 bar
Maximum Head 3 m / 10 ft H2O 8.8 m / 28.8 ft H2O
GY ---- C
GY GY
Centrifugal
entrifugal MY
C C
entrifugalentrifugal
MY ---- Centrifugal
Centrifugal
MY MY
Centrifugal Centrifugal
Pressure (psi)
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.
110-471 19
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) 20 x 10 x 17 in. / 50.8 x 25.4 x 43.2 cm
Noise Rating
(measured 1m away, 1.5m from the
ground)
Compressor Hermetic
Refrigerant type
Controller
Controller
ControllerController
Display type Digital, LED
Temperature stability ±0.1°C
Display resolution 0.1°
Temperature Units °C or °F
User calibration Temperature
Setup
Setup
SetupSetup
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
Command
Command Description
Command Description
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] +xx.x[CR] or -xx.x[CR]]
Read Temperature Units RU[CR] C or F
Read Status RW[CR]
Read Compressor Discharge Temperature (°C)
1
Read fault status
Read Evaporator Inlet Temperature (°C) 1 REI[CR] xxx.x[CR]
Read Evaporator outlet temperature (°C) 1 REO[CR] xxx.x[CR]
Output continuous data stream, one set per
second
Set on/off
Command Command
Format
Format
FormatFormat
RUT[CR]
RF[CR]
RDi[CR]
Values
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
xx = 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]
C[CR] or F[CR]
1[CR] or 0[CR]
xxx.x[CR]
![CR]
![CR]
1. Although these values are output as part of the data stream, the data is not valid and should be ignored.
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
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 Any products marked with this symbol must be collected separately, according to
the regulatory
the regulatory 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
110-471 22
Replacement Parts and Accessories
Replacement Parts and Accessories
Replacement Parts and AccessoriesReplacement Parts and Accessories
Part Number
Part Number
Description
Description
DescriptionDescription
Compressor (60 Hz) 750-788 750-103
Compressor (50 Hz) 750-789 750-104
Centrifugal Pump, GX (120 V, 60 Hz) 525-816
Centrifugal Pump, GY (240 V, 50 Hz) 525-817
Centrifugal Pump, MX (120 V, 60 Hz) 525-784
Centrifugal Pump, MY (240 V, 50 Hz) 525-785
Fan Motor (60 Hz) 215-688
Fan Motor (50 Hz) 215-689
Condenser 750-810
Reservoir Cap 300-460
Reservoir Spill Cup 300-575
Circuit Breaker (50/60 Hz) 215-330
Air Filter 750-798
LM Series MM Series
Part NumberPart Number
Filter Kit, 50 micron with housing and bypass 510-520
Filter Kit, 50 micron with housing (no bypass) 510-519
Mobility Base with locking casters 505-169
Buna N Tubing, ½” (13 mm); 1 m (39”) length 060308
Viton Tubing, ½” (13 mm); 1 m (39”) length 060316
Viton Tubing, 3/8” (10 mm); 1 m (39”) length 060319
Insulation for all ½” (13 mm) tubing; 1 m (39”) length 060311
Tube Clamp for ½” (13 mm), 5/8” (16 mm), and ¾” (18 mm) O.D.
tubing, 1 each
Fitting, ½” male NPT to 3/8” (9.5 mm), hose barb, brass, straight 776-196
Fitting, ½” male NPT to 3/8” (9.5 mm), hose barb, brass, elbow 775-047
Fitting, ½” male NPT to 5/8” (16 mm), hose barb, nylon, straight 300-131
Fitting, ½” male NPT to ½” (13 mm), hose barb, nylon, straight 300-096
Fitting, ½” male NPT to ¾” (19 mm), hose barb, nylon, straight 776-197
Fitting, ½” male NPT to M16x1 13 mm (½”), brass, straight 775-048
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.
Five
0.5 gal / 2.27 liter bottles
004-300060
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 DAMAGE
LIMITATION ON DAMAGES.
LIMITATION ON DAMAGELIMITATION ON DAMAGE
LIMITED 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.
S. THE MANUFACTURER’S SOLE OBLIGATION UNDER THE WARRANTY IS
S.S.
PolyScience
6600 W. Touhy Avenue Niles, IL 60714 U.S.A.
1-800-229-7569 1-847-647-0611
www.polyscience.com
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