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LS Series
Operator's Manual
22 pgs798.11 Kb0

PolyScience LS Series, LS51, LS53 Operator's Manual

Operator’s Manual
LS-Series Compact Chiller
110-445 12.20.12
Table of Contents
General Safety Information....................................................................................................................................................................... 2
Safety Recommendations ..........................................................................................................................................................................3
Unpacking Your Chiller................................................................................................................................................................................3
Regulatory and Compliance Testing ........................................................................................................................................................3
Contents.........................................................................................................................................................................................................3
Site Requirements ...................................................................................................................................................................................... 5
Ambient Temperature and Relative Humidity .................................................................................................................................. 5
Location .................................................................................................................................................................................................... 5
Clearance.................................................................................................................................................................................................. 5
Electrical Power........................................................................................................................................................................................... 5
Optional RS232 Serial Output .................................................................................................................................................................. 5
Plumbing ....................................................................................................................................................................................................... 6
Process Piping......................................................................................................................................................................................... 6
Fluid Filter ................................................................................................................................................................................................ 6
Reservoir Drain ....................................................................................................................................................................................... 6
Closed System or Cooling Coil Setup...................................................................................................................................................... 6
Startup ...........................................................................................................................................................................................................7
Process Coolant .......................................................................................................................................................................................7
Electrical Power ...................................................................................................................................................................................... 8
Starting Process Fluid Flow.................................................................................................................................................................. 8
Selecting the Temperature Unit (°C or °F) ............................................................................................................................................ 8
Displaying and Adjusting the Set Point .................................................................................................................................................. 9
Setting Operational Parameters.............................................................................................................................................................. 9
High Temperature Limit (H-##)........................................................................................................................................................... 9
Low Temperature Limit (L-##)...........................................................................................................................................................10
Auto-Refrigeration Temperature (A ##) ..........................................................................................................................................10
Specific Heat (P.##)..............................................................................................................................................................................10
Communications Baud Rate (PC##) ..................................................................................................................................................10
Temperature Calibration (C #.#) ......................................................................................................................................................... 11
Password (Pd00) .................................................................................................................................................................................... 11
Enabling/Disabling the Local Lockout (LLO) ......................................................................................................................................... 11
Magnetic Drive Centrifugal Pump...........................................................................................................................................................13
Condenser, Air Vents, and Reusable Filter ........................................................................................................................................... 13
Fluid Level.................................................................................................................................................................................................... 13
Temperature Calibration .......................................................................................................................................................................... 13
Cleaning Exterior Surfaces ......................................................................................................................................................................14
Troubleshooting.......................................................................................................................................................................................... 14
Model LS51/LS53 60Hz Compact Chiller Specifications ................................................................................................................... 15
Model LS52 50Hz Compact Chiller Specifications ............................................................................................................................. 16
General Information & Specifications .................................................................................................................................................... 17
RS232 Serial Communications (Optional) ............................................................................................................................................18
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Introduction
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 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-up, and operation.
Proper operation and maintenance is the user’s responsibility.
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Safety 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
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: Keep unit upright when moving. Be sure to follow your company’s procedures and practices regarding the safe lifting and relocation of heavy objects.
Regulatory and Compliance Testing
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.
CE (50Hz units)
EC Low Voltage Directive 2006/95/EC
EC Electromagnetic Compatibility Directive 2004/108/EC IEC 61010-1-2001 IEC 61326:2005 / EN 61326 : 2006
Contents
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 3/8 inch hose barb
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Controls and Components
Temperature
Units LEDs
Heating &
Cooling LEDs
Temperature
Display
Set Button
Air Filter
Compartment
Reservoir Cap
Up & Down Arrow Buttons
Fluid Level Indicator
On/Off Button
Identification
Label
Fluid Inlet
Drain
Circuit Breaker / Power Switch
IEC Power Connection
RS-232 Connection (optional; not shown)
Fluid Outlet
NOTE: When controlling at the set point temperature, it is not uncommon for both the heating and cooling LEDs to be lit simultaneously.
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Installation and Startup
WARNING: Be sure all power is off before proceeding.
Site Requirements
Ambient 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
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: The Chiller may be located at a level below that of the equipment being cooled. As long as
the process remains closed, overflow will not occur when adding cooling fluid to the Chiller reservoir.
Clearance
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
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: DO NOT plug the Chiller into the electrical outlet until the unit is ready for Startup.
Optional 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 protocol.
Technical Information
section (page 18) for the RS232 serial communication
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Plumbing
Process 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
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
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
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: If the Chiller is connected to an external apparatus with a built-in shutoff, an external bypass loop 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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