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2050 Operations Manual 

Rev L    2/2/2018 

Page 18 of 22 

 

 

 

 

 

PREVENTATIVE MAINTENANCE 

 
The CARON circulator has been robustly designed to minimize performance problems.  
However, regular maintenance is very important for continuous trouble free operation.   
 
 
Recommended Daily Maintenance Checks 
 

  Check the Temperature display versus setpoints. 

  Check for and correct any alarm condition. 

 
 
Recommended Monthly Maintenance Checks 
 

  Check condenser air intake filter on top of unit.  If it is dirty, replace it with CARON 

part number FLTR306.  Washing the filter will result in poor performance. 

 
Recommended Annual Maintenance Checks 
 

  Disinfect all interior surfaces with a general purpose laboratory cleaning agent such 

as Cole-Parmer #G-08796-00. 

  Vacuum or blow out fan and internal components. 

  Perform a temperature calibration  

 

 

R-134a refrigerant 
 

  This  unit  contains  R-134a  which  is  a  fluorinated  greenhouse  gas  covered  by  the 

Kyoto Protocol (Regulation EC No 842/2006) with a GWP of 1,300.  Quantity of R-
134a is less than 0.2 kg. 

 

To prevent electrical shock, turn off and unplug the unit before performing any service 
or  maintenance  work  on  the  unit.    Performing  operations  or  maintenance  on  this  unit 
other than the ones described in this manual can cause hazard situations and should 
only be performed by qualified service personnel. 

Summary of Contents for 2050

Page 1: ......

Page 2: ...e are committed to continuous quality improvement Our goal is to supply our customers with highly reliable equipment at a fair price In order to openly monitor our performance we would appreciate your feedback on our products and services If you have questions or any suggestions for improvement based on the installation or operation of the equipment you have purchased please contact our service de...

Page 3: ... Operations Manual Rev L 2 2 2018 Page 3 of 22 Revision Log Version Date Description J 06 02 14 Added condenser filter K 08 02 17 Updated consistency between all manuals L 02 02 18 Consolidated terminology ...

Page 4: ... the Circulator Emptying the Circulator Operation 12 Changing the Temperature Setpoint Changing the Low Temperature Tracking Alarm Level Changing the High Temperature Tracking Alarm Level Calibration 15 Alarms 16 Low Level Alarm Temperature Tracking Alarms Temperature Sensor Error High Temperature Safety Preventative Maintenance 17 Specifications 18 Electrical Schematics 19 Troubleshooting 20 Spar...

Page 5: ...the right to inspect the equipment and determine the repairs or replacement parts necessary The customer will be notified within a reasonable time after inspection of any costs incurred that are not covered by this warranty prior to initiation of any such repairs NOT COVERED Calibration of control parameters Improper installation including electrical service gas and water supply tubing gas supplie...

Page 6: ...N makes no other warranties express or implied of merchantability fitness for a particular purpose or otherwise with respect to the goods sold under this agreement This warranty cannot be altered unless CARON agrees to an alteration in writing and expressly stated herein shall be recognized to vary or modify this contract Ohio Law governs this warranty ...

Page 7: ...ive will have the right to inspect the equipment and determine the repairs or replacement parts necessary The customer will be notified within a reasonable time after inspection of any costs incurred that are not covered by this warranty prior to initiation of any such repairs NOT COVERED Calibration of control parameters Improper installation including electrical service gas and water supply tubi...

Page 8: ... or implied of merchantability fitness for a particular purpose or otherwise with respect to the goods sold under this agreement This warranty cannot be altered unless CARON agrees to an alteration in writing and expressly stated herein shall be recognized to vary or modify this contract Ohio Law governs this warranty Caron Products Services Inc PO Box 715 Marietta OH 45750 740 373 6809 ...

Page 9: ...ge 9 of 22 INTERNATIONAL SYMBOLS AND DEFINITIONS WARNINGS Warning of hazardous area Warning of dangerous electric voltage Earth ground protective conductor Local government may require proper disposal Help Information i Warning of hot surface ...

Page 10: ...You have just purchased the latest technology in constant temperature circulators Before using the equipment familiarize yourself with key components of the product and thoroughly read this manual Drain Plug Lift Handle Power Switch External Circulation Connections Lid Knob Control Panel ...

Page 11: ... an area where there is no direct airflow from heating and cooling ducts and out of direct sunlight Allow four inches of clearance on the top and back of unit for airflow DO NOT cover up the air vent holes Verify proper electrical power is available External Circulation To use the external circulation connect inlet and outlet quick disconnect fittings to circulator Be sure external loop is sealed ...

Page 12: ...h water propylene glycol or other non flammable appropriate thermal fluid Circulator should be filled approximately 0 5 from top or until the low liquid level alarm shuts off Additional fluid may be needed after the unit is turned on to compensate for external tubing volume Operation of the unit in temperature ranges near or below 0ºC may cause the fluid to attract water into the reservoir especia...

Page 13: ...d on Within minutes the temperature will begin to approach setpoint The circulator keypad is designed to produce a simple easy to understand user interface that is intuitive and user friendly With just a few presses of the keys the logic behind the user interface is very easy to learn and remember There are four basic keys to setup or change any parameter to be setup or changed Rotates through the...

Page 14: ...temperature tracking alarm level is the deviation from the temperature setpoint which will cause a low temperature alarm The low temperature tracking alarm level is adjustable from 0 1 to 10 0 The default is 5 0 which indicates 5 0ºC below setpoint To change the low temperature tracking alarm level 1 Press the key twice from the main menu AL L is displayed briefly 2 Press the to increase decrease ...

Page 15: ...8 Page 15 of 22 1 Press the key three times from the main menu AL H is displayed briefly 2 Press the to increase decrease alarm level hold for scroll 3 Press the key to save the alarm level 4 Press the key twice to return to the main menu ...

Page 16: ...C The default is 0 0 C To enter a calibration offset 1 Press the key four times from the main menu cAL is displayed briefly 2 Press the to increase decrease the calibration offset hold for scroll 3 Press the key to save the calibration offset 4 Press the key once to return to the main menu Temperature calibration example If the circulator temperature display reads 40 0 C and the calibrated indepen...

Page 17: ...sts the display cycles between the current temperature and the alarm condition at 1 second intervals To avoid nuisance alarms on system power up or setpoint changes the alarms are disabled for two hours or until the actual temperature gets within the alarm high and low levels Temperature Sensor Error In the unlikely event that a faulty temperature sensor is detected SErr will be displayed Both the...

Page 18: ... poor performance Recommended Annual Maintenance Checks Disinfect all interior surfaces with a general purpose laboratory cleaning agent such as Cole Parmer G 08796 00 Vacuum or blow out fan and internal components Perform a temperature calibration R 134a refrigerant This unit contains R 134a which is a fluorinated greenhouse gas covered by the Kyoto Protocol Regulation EC No 842 2006 with a GWP o...

Page 19: ...ead Work Area Dimensions 6 0 W x 2 0 F B x 6 5 D External Dimensions 13 5 W x 13 5 F B x 14 0 H Heater 750 Watts Safeties Over temperature shutoff and low level alarm Reservoir Capacity 1 4 gallons 5 3 liters Circulator Reservoir Lid Material Stainless steel Cabinet Material Stainless steel powder coated metal Electrical 115 60 Hz 10A 230V 50 60 Hz 5A Shipping Weight 53 lbs 24 0 kg Specifications ...

Page 20: ...2050 Operations Manual Rev L 2 2 2018 Page 20 of 22 ELECTRICAL SCHEMATICS ...

Page 21: ...he top of the unit clean Is the pump agitating fluid inside the reservoir Is the fluid rated for the temperature being set ie water only at temperatures above 10ºC Problem Temperature is below setpoint Has the over temperature safety shut off tripped Is the pump agitating fluid inside the reservoir Is there sufficient fluid inside the reservoir low level alarm on Problem No external circulation Ar...

Page 22: ... 101 Refrigeration filter dryer FAN 104 Condenser fan 230V FAN 118 Condenser fan 115V FIT 101 Drain pipe plug FLTR306 Condenser Filter Replacement Kit FUS 103 Fuse 10A for 115V models FUS 104 Fuse 5A for 230V models HTR 141 Heater 115V HTR 142 Heater 230V LEV 106 Level float switch MTR 136 Pump motor QDC 101 Inlet outlet female fittings in tank top QDC 103 Male quick disconnects for external circu...

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