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System I Liquid to Liquid
Heat Exchanger
NESLAB Manual P/N 013564
Rev. 06/05/97
Instruction and Operation Manual
NESLAB online
Product Service Information, Electronic Catalog,
Applications Notes, MSDS Forms, e-mail.
(603)427-2490
Set modem to 8-N-1 protocol, 1200 - 14400 baud
Voice Info: (800) 4-NESLAB
Comments on this manual can be sent to:
NESLAB@lifesciences.com
or visit our Web page at:
http://www.neslabinc.com
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Related Manuals for Neslab System I Liquid to Liquid
Summary of Contents for Neslab System I Liquid to Liquid
- Page 1 System I Liquid to Liquid Heat Exchanger NESLAB Manual P/N 013564 Rev. 06/05/97 Instruction and Operation Manual NESLAB online Product Service Information, Electronic Catalog, Applications Notes, MSDS Forms, e-mail. (603)427-2490 Set modem to 8-N-1 protocol, 1200 - 14400 baud Voice Info: (800) 4-NESLAB Comments on this manual can be sent to: NESLAB@lifesciences.com...
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Page 2: Table Of Contents
System I Liquid to Liquid Heat Exchanger Table of Contents PREFACE Compliance .................... 2 Unpacking ....................2 Warranty ....................2 After-sale Support .................. 2 SECTION I Safety Warnings ....................3 SECTION II General Information Description ..................... 4 Specifications ..................4... -
Page 3: Preface
See back page for more details. After-sale Support NESLAB is committed to customer service both during and after the sale. If you have questions concerning the operation of your unit, contact our Sales Department. If your unit fails to operate properly, or if you have questions concerning spare parts or Service Contracts, please contact our Service Department for assistance. -
Page 4: Warnings
Section I Safety Warnings Make sure you read and understand all instructions and safety precautions listed in this manual before installing or operating your unit. If you have any questions concerning the operation of your unit or the information in this manual, contact our Sales Department (see After-sale Support). -
Page 5: Description
Section II General Information Description The System I Liquid to Liquid Heat Exchanger uses building recirculating or tap water as the secondary cooling medium to remove heat from the cooling fluid in the closed recirculation loop. The unit consists of a heat exchanger, recirculation pump, PVC reservoir, and an analog temperature controller. -
Page 6: Site
Section III Installation Site The unit should be placed in a location with easy access to a cooling water source and a drain. Never place the unit in a location where excessive heat, moisture, or corrosive materials are present. Facility Water Requirements Limit the facility water inlet pressure to approximately 65 psig. -
Page 7: Plumbing Requirements
If substantial lengths of tubing are necessary, insulation may be required to prevent loss of cooling capacity. Tubing and insulation are available from NESLAB. Contact our Sales Depart- ment for more information (see Preface, After-sale Support). It is important to keep the distance between the unit and the instrument being cooled as short as possible, and to use the largest diameter tubing practical. -
Page 8: Water Quality Standards And Recommendations
Water Quality Standards and Recommendations Permissible(PPM) Desirable(PPM) Microbiologicals (algae,bacteria,fungi) Inorganic Chemicals Calcium <40 Chloride <25 Copper Iron <0.1 Lead 0.015 Magnesium <12 Manganese 0.05 <0.03 Nitrates\Nitrites 10 as N Potassium <20 Silicate <1.0 Sodium <20 Sulfate <50 Hardness <0.05 Total Dissolved Solids Other Parameters 6.5-8.5 Resistivity... - Page 9 Maintain this water quality at a resistivity of between 1 to 10 megohm-cm (compensated at 25°C) by using a purification system. Although the initial fill may be as high as 10 megohm-cm (compensated at 25°C), the desired level for long time usage is 1 to 3 megohm-cm (compensated at 25°C). The above two recommendations will reduce the electrolytic potential of the water and prevent or reduce the galvanic corrosion observed.
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Page 10: Filling Requirements
Filling Requirements The reservoir access cover is located on top of the unit. Remove the reservoir access cover and locate the reservoir plug (square nut). Remove the plug and fill the reservoir to the bottom of the fill hole flange. Keep extra cooling fluid on hand until the entire system (the System I, the instrument being cooled and the tubing that connects them) is filled. -
Page 11: Start Up
Section IV Operation Start Up Before starting the unit, check all electrical and plumbing connections and make sure the circulating system has been properly filled with cooling fluid. To start the unit, place the POWER ON/OFF switch in the ON position and momentarily press and hold the PUSH TO START button. -
Page 12: Special Features
Section V Special Features Low Fluid Level Monitor The low fluid level monitor is connected to a float switch in the reservoir. A low fluid level fault occurs when the cooling fluid in the reservoir drops below the operating level. In the event of a low fluid level fault, the unit will shut down, the red HIGH TEMP/LOW LEVEL lamp will light, and the EXTERNAL INTERLOCK contacts will open. -
Page 13: Maintenance And Service
Contact our Service Department for assistance (see Preface, After-sale Support). Service Contracts NESLAB offers on-site Service Contracts that are designed to provide extended life and minimal down-time for your unit. For more information, contact our Service Department (see Preface, After-sale Support). -
Page 14: Pressure Relief Valve Adjustment
PD-2 Pump: a wire mesh screen is located under the large hex nut on the pump suction line. Strainer Before cleaning the strainer, disconnect the line cord from the power source and drain the reservoir. Remove the appropriate nut. Remove the strainer from the unit and rinse it with water. -
Page 15: Pump Lubrication
Pump Motor Lubrication Units with PD pumps require pump motor lubrication. Refer to the pump identification label on the rear of the unit for the specific pump in your unit. Motors used to drive the pump are manufactured by several companies. These motors use sleeve type bearings with large oil reservoirs. -
Page 16: Troubleshooting
Section VII Troubleshooting Checklist Unit will not run (POWER ON/OFF switch is in ON position, HIGH TEMP/LOW LEVEL light is not lit). Make sure the voltage of the power source meets the specified voltage, ±10%. Refer to the serial number on the rear of the unit for the specific electrical requirements of your unit. -
Page 17: Service Assistan
Service Assistance If, after following these troubleshooting steps, your unit fails to operate properly, contact our Service Department for assistance (see Preface, After- sale Support). Before calling please obtain the following information: Part number Serial number Voltage of unit Voltage of power source Temperature at which the problem occurs Temperature, pressure, and flow rate of cooling water supply Technical Support... -
Page 18: Flow Diagram
Section VIII Diagrams Flow Diagram Temperature Sensor Relief Valve Pressure Gauge Pump Heat Exchanger Control Tank Valve Strainer Strainer (PD-2, Pumps) ( PD-1 Pumps) RECIRCULATING COOLING WATER WATER - 17 -... -
Page 19: Warranty
NESLAB Instruments, Inc. warrants for 12 months from date of shipment any NESLAB unit according to the following terms. Any part of the unit manufactured or supplied by NESLAB and found in the reasonable judgment of NESLAB to be defective in material or workmanship will be repaired at an authorized NESLAB Repair Depot without charge for parts or labor.