Service Manual
Contents
1. 12 BASE GND MDS CHASSIS 18 GA GRN YEL 7 COMPRESSOR GND BLUE OR BLK RELAY PIN 11 START CAPACITOR RELAY PIN 13 NOTE RELAY AND START CAPACITOR ARE SUPPLIED WITH COMPRESSOR 22 GA BLK 3 T 22 a MDS HI LO 2 E 1 MDS HI LO 3 0 B MDS HI LO 4 7 MDS HI LO 5 MDS HI LO VALVE Diagram 4 Pump power schematics Q2 Q4015L6 VAL TO 220 ALT V1 1 HS2 593002 532 593002B34 593002 PC1 7124B8 VAL 7124B8 1 CHASSIS GUF FOR 110V BNEUTRAL 3UF FOR 240V Diagram 5 Heater power schematics HEATER Q1 Q4015L6 VAL TO 220 ALT V1 1 HS1 529902 532 529902B25 529902 OTP1 SPADE200 OTP2 SPADE200 HTR1 SPADE200 HEATER HTR2 SPADE200 BNEUTRAL Diagram 6 Compressor control pc board schematic 9002 9012 9102 9112 HOT LINE VOLTAGE NEUTRAL FROM HEAD COMPRESSOR HOT Q3 Q4015L6 VAL TO 220 ALT V1 1 HS1 529802B25 529802B25 529802B25 SPADE200 NEUTRAL Diagram 7 PWM control pc board schematic 9502 9512 9702 9712 9602 9612 COMPRESSOR Qi VAL TRA NEUTRAL z 0 LINE VOLTAGE HIBS e Xs n FROM HEAD 6520002825 i ES GROUND SPADE200 XFRI XFRA VAL PL10 16 ul 00256 0254 DF0236 i POC 220001800 WN MLSS100 02 PHEN 4603 x PLUS 03 Umm o 143001 MINUS NDTWSS l 501 223 4013055 Section 9 RS22. 4 LN A wi SAFETY WE en sese o SE TIMER ESC Service Manual Immersion Circulators Heat Only Circulators Refrigerated Heated Circulators With Digital or Programmable Controllers Before performing any service to the unit reset the controller to its default settings It is our experience that many problems can be resolved by doing so See Sec 4 1 of this manual for instructions Refrigeration service should only be performed by a qualified refrigeration technician The refrigeration system contains no user serviceable parts This manual is intended for use by qualified service personnel only Disconnect power cord before removing cover exposed voltage when cover is removed Hazard from moving parts present when cover is removed 110 345 12 23 09 Table of Contents Section 1 Identifying your unit Section 2 Specifications 2 1 General Description Heating and Refrigerated Circulators 9102 9112 9002 9012 9502 9512 9602 9612 9702 9712 8002 8012 8102 8112 8202 8212 2 2 General Description Immersion Circulators 7312 2 3 General Specifications all units Section 3 Maintenance 3 1 Heater 3 2 Pump Motor 3 3 Cleaning 3 4 Maintaining Clear Bath Water 3 5 Condenser Air Vents and Reusable Filter Refrigerated Circulators Only 3 6 Calibration Section 4 Controller 4 1 Resetting unit to Factory Defaults 4 2 Removing Controller Cover all un
3. CEL a cow PUMP MOTOR POWER SUPPLY PCB P BLK 6 GA QU W im K or POWER SUPPLY PCB RED 6 GA or 3 4 POWER SUPPLY LL LLL PCB OTP2 W v POWER SUPPLY PCB P YEL ABLE TIE WIRES TOGETHER GROUND 2 POWER SUPPLY HEATER PCB HIRI CONTROL POWER SUPPLY POWER SUPPLY HEATER PCB PSB CN2 20 PIN CABLE POWER SUPPLY PCB G Diagram 2 Wiring Diagram Refrigeration All 6 Liter Refrigerated Units COMPRESSOR BASE GROUND BASE GROUND RELAY PIN 2 OVERLOAD PROTECTOR RELAY PIN 1 OVERLOAD PROTECTOR COMP HOT COMP NEUTRAL POWER BOARD GRN YEL 18 GA 5 225 394 COMP GROUND GRN YEL 18 GA 28 FAN CORD 18 GA 19 5 FAN go gy 225 195 COMP HOT WHITE 18 GA 16 ky ZZ 225 195 COMP NEUTRAL RED 18 GA 16 5 gekry au r 225 195 HOT WHT 18 GA 16 5 NEUTRAL 225 195 kl 44l4 COMMUNICATION CABLE 27 225 195 GROUND POWER BOARD COMPRESSOR BOARD Diagram 3 Wiring Diagram Refrigeration All 13 Liter and 28 Liter Refrigerated Units 9502 9512 9702 9712 9602 9612 MDS4G PSB CM PG 18 GA YELLOW 33 Do Kit s wn 18 BLA 4 xim i PSB CN PH 18 WHITE 17 MDS CN RELAY 10 FAN CORD 18 GA 27 FAN MDS CH RELAY 14 36 212331 CNI MDS RJ5458 18
4. 024 0 Evo 0230 CH 055 0 Shown on the screen above 26 10 C is the current fluid temperature In a 5 second period the PWM valve is on for 1 375 55 0 5x 25 1 375 seconds and will be off for 3 625 5 1 375 3 625 seconds The heater will be on zero 155 0 percent Valve Off is the current status of PWM valve EVi 24 0 and EVo 23 0 indicate the temperature of refrigerant that goes in and out of the fluid reservoir CHs 55 0 is not available Section 8 Technical Drawings 8 1 Refrigeration Assemblies 1 compressor 8 Gata Tube s Filter Dryer Solenoid Valve if applicable EN Fig U 6 Liter Low Profile Refrigerated Refrigeration Assembly I TS caman Tube ae Filter Dryer Low Side Line Solenoid Valve if applicable Fan assembly Fig V 13 Liter amp 13 Liter Low Temp Refrigerated Refrigeration Assembly 5 aT ae Condenser Hansi Filter Dryer Low Side Line Solenoid Valve if applicable Fan assembly Fig W 28 Liter Refrigerated Refrigeration Assembly ICS Diagrams amp Schemat iring 8 2 W Diagram 1 Wiring Diagram Controller all units POWER SUPPLY S C 4 16 GA BLUE 2 1 2 IEC FILTER N IEC FILTER L ABLE TIE WIRES TOGETHER Aira 6 GA BROWN 1 47 POWER SUPPLY LEM PCB H A ath gt
5. PC Board 4 7 Replacing the PWM Control PC Board 9502 9512 9602 9612 9702 9712 1 Remove the controller and deck plate from the refrigeration assembly see Sec 4 3 Slide the case assembly from the refrigeration assembly Note the color and location of the wires that are connected to the PWM Control PC Board Disconnect the wires and remove the screws that secure the PCB to the refrigeration unit Installation of a new PWM control PCB is the reverse of the previous steps Figure L PWM Control PC Board e 1 T ANT 6 L x 0t zL SER T d 4 8 Replacing Pump Motor all units 4 Remove controller from unit if applicable and remove cover see Sec 4 2 amp 4 3 Note the color and location of the wires which are connected to the pump motor at PYEL PRED PBLK Disconnect these 3 wires Remove the green pump motor ground wire from the controller chassis Remove the 4 nuts that secure the pump motor to the chassis Position the controller upside down Remove the screw that secures the lower impeller to the pump shaft Before removing the impeller note the direction the impeller blades are facing Remove lower impeller Note position of red rubber slinger located where motor shaft meets the bottom of the controller chassis Remove the pump motor from the controller chassis Install the new pump motor by following the previous steps in reverse When reinserti
6. Version 2002 Service Pack 2 Driver Signing lets you make sure that installed drivers compatible with Windows Windows Update lets you set up how Windows connects to Windows Update for divers Driver Signing Windows Update Hardware Profiles Hardware profes provide a way for you to set up and store diferent hardware configurations Hardware Profiles Click on the next to Ports COM amp LPT Double click on the communications port that the unit is attached to usually COM1 On the General Tab make sure the port is enabled lolx File Action View Help CSERVICE J5 ps X Computer See Disk drives a Display adapters A DVDICD ROM drives Floppy disk controllers pr Hi Floppy disk drives H E IDE ATA ATAPI controllers H Keyboards E Mice and other pointing devices E 2 Monitors EE Network adapters ECP Printer Por EE Processors DEC SCSI and RAID controllers E Sound video and game controllers EK 4 System devices Universal Serial Bus controllers Communications Port COM1 Properties ajx General Fort Driver Details Resources E Communications Port COM Device type Ports amp LPT Manufacturer Standard port types Location on Intel H 8260764 LPC Interface Controller Device status This device is working properly IF vau are having problems with th
7. indicates the compressor control pc board is defective See Sec 4 6 gt Ifthe voltage at CH is 122 VAC the main pc board and compressor control board are functioning properly the compressor or associated electrical devices relay capacitor overload wiring are defective Identifying the exact defective component is beyond the scope of this manual Please note that the power supply pc board has no effect on refrigeration system functions other than supplying power to the compressor via terminals CMPG CMPH amp CMPN 7 5 Unit does not cool 9502 9512 9602 9612 9702 9712 wiring diagrams located in Sec 8 2 On the PWM control pc board measure the COMP signal voltage coming from the main pc board A properly functioning main pc board will produce an active enabled voltage of 0 68 VDC gt Ifthe voltage remains a constant 5 0 VDC replace the defective main pc board see Sec 4 4 gt Ifthe COMP signal is at 0 68 VDC measure the compressor triac output at CH on the PWM control PC board The correct voltage is 122 VAC A voltage significantly lower than 122 VAC indicates the compressor control pc board is defective see Sec 4 5 gt If the voltage at CH is 122 VAC the main pc board and PWM control board are functioning properly the compressor or associated electrical devices relay capacitor overload wiring are defective Identifying the exact defective component is beyond the scope of this manual On the PWM
8. not allow cleaning liquids or sprays to enter the Controller vents 3 4 Maintaining Clear Bath Water When water is used as the bath fluid optimal conditions are present for algae growth To prevent algae contamination and minimize the need for draining the reservoir an algaecide should be used Do NOT use chlorine bleach in the reservoir or on any pump parts 3 5 Condenser Air Vents and Reusable Filter Refrigerated Circulators Only To keep the refrigeration system operating at optimum cooling capacity the condenser the front and back 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 The reusable filter is easily accessed from the bottom front of the unit Turn the filter retaining clip away from the filter cutout and remove the filter as shown in figure B Use a mild detergent and water solution to wash off any accumulated dust and dirt and then rinse and dry thoroughly before reinstalling A Figure B Removing Air Filter 3 6 Calibration At times there may be a minor temperature difference between the Controller 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 laboratory instruments These adjustmen
9. the heater to the impeller cover assembly Slide the two clips and OTP thermostat off of the heater Install the new heater by following the previous steps in reverse Remove OTP i hermostat AP Remove these screws and clips Section 5 Refrigerant Charge refrigerated units only Please note Units are factory charged by refrigerant weight not pressure There are no published refrigerant pressure specifications available as they will vary with fluid temperature Modes Refrigerant Type Charge Grams Charge Ounces Section 6 Basic Troubleshooting 6 1 Stability problems unit will not hold temperature within specified tolerances Confirm problem is with stability not otability is the ability of the unit to hold a constant temperature within accuracy a specified tolerance Stability is often confused with accuracy which is the ability of the unit to display temperature within a given tolerance based on a known method of measurement If temperature is being held at a constant temperature with little fluctuation but the displayed temperature differs from that of a thermometer or separate device also reading temperature the temperature display of the unit can be offset by using the calibration offset function Make sure the lid is used and that the The included lid should always be used Insulation should be used on fluid path is insulated the entire fluid path wherever possible If an external tank is be
10. this manual units are identified using the following format gt Immersion circulator refers to the programmable immersion circulator xx Liter Heating Circulator i e 13 liter heating circulator refers to heat only circulators with internal reservoir xx Liter Refrigerated Circulator i e 28 liter refrigerated circulator refers to heating refrigerating circulators with internal reservoir 13 liter low temperature models will be identified as 13 liter low temp refrigerated circulator gt Controller refers to the upper portion of the unit that includes the PC boards pump and heater In the case of Immersion Circulators the entire unit is the controller Please see Figure A below for additional assistance with identifying your unit Figure A Circulator Examples Immersion Circulator 6 Liter 13 Liter TH JJ JUR j a 6 Liter 6 Liter Low Profile 13 Liter amp 13 Liter Low Temp please contact your vendor for additional assistance determining which unit you have Section 2 Specifications 2 1 General Description Heating and Refrigerated Circulators Refrigerated and Heat Only Circulating Baths with the Programmable or Digital Controller are designed for use as st
11. voltage coming from the main pc board A properly functioning main pc board will produce a constant voltage voltage level will depend on pump speed setting gt constant logic low voltage 0 7 VDC will prohibit changing pump speeds and indicates a defective main board see Sec 4 4 gt constant logic high voltage 5 VDC will not turn the pump motor on Verify that the ribbon cable from the main pc board to the power supply board is securely connected If the ribbon cable is known to be good replace the main pc board see Sec 4 4 gt Measure the pump TRIAC output at PYEL on the power supply PC board A properly functioning main PC board will produce a constant voltage voltage level will depend on pump speed setting gt voltage reading significantly lower than 26 VAC or zero voltage indicates the power supply pc board is defective see Sec 4 5 7 2 Unit not heating all units wiring diagrams located in Sec 8 2 On the power supply pc board measure the HEAT signal voltage coming from the main pc board An active enabled voltage will be 0 68 VDC gt Ifthe voltage remains a constant 5 0VDC replace the defective main pc board see Sec 4 4 gt Ifthe HEAT signal is at 0 68 VDC measure the heater output at HTR1 on the power supply pc board The correct voltage is 122 VAC A voltage output significantly lower than 122 VAC indicates the power supply pc board is defective see Sec 4 5 gt
12. 150 C 11 9 8 8202 8212 Ambient 5 to 150 C 11 9 8 7312 Ambient 5 to 200 C 11 9 7 The following specifications apply to all units Head data only on Digital units required Readout Accuracy Graphic LCD C or F 0 25 C 1100W 115V 2200W 240V 30 LPM 60H 22 LPM OFZ 22 60Hz 15 LPM 1 Temperature stability may vary depending on bath volume surface area insulation and type of fluid NOTE Performance specifications determined at ambient temperature of 20 C 68 F Environmental Conditions e Indoor Use Only e Over Voltage Category e Maximum Altitude 2000 meters e Operating Ambient 5 to 30 C e Relative Humidity 80 for temperatures to 30 C e Pollution Degree 2 e Class 1 Residential Commercial Light Industrial e Class 2 Heavy Industrial Section 3 Maintenance 3 1 Heater The heater should be kept clean If deposits build up on the heater they may be removed by scrubbing with a non metallic abrasive pad Do not use steel wool 3 2 Pump Motor The pump bearings are permanently lubricated with high temperature silicone grease and do not require additional lubrication Should the bearings become noisy replacement of the entire pump motor is recommended This will reduce repair labor costs and retain fluid pumping reliability 3 3 Cleaning Only mild detergents and water or an approved cleaner should be used on the painted and stainless steel surfaces of the Circulator Do
13. 32 9 1 Setting up and verifying COM port settings Access the System control panel Start Control Panel System In previous versions of Windows the control panel is located in Start Settingsl 2 E Ae RARUS Program E Control Panel _ O o m E gt Edt Yew Favorites Tods ay _ 2 My Recent Documents Date and Time lr pe E Display Kl kd Ei po Search Folders IE a Polder Options Adress D Control Panel 1 My Computer p Regna amj Remote Scanners and Scheduled Language Control Tasks e 9 g Security Sounds and Cantar Aude Devices e Systems Taskbar and User Accounts Windows Management Stark Menu Firewall K Wireless Network Ser See Also j Help and Support Al Programs F Fa Loa off 9 st 00 JOUEUR Esat 9 KB Windows Firewall Select the Hardware tab then click the Device Manager button In previous versions of Windows click directly on the Device Manager tab System Properties System Properties xl System Restore System Restore Automatic Updates Remote General Computer Mame Genera Computer Mame f Hardware Advanced System Device Manager Microsoft Windows AP The Device Manager lists all the hardware devices installed Professional SES on your computer Use the Device Manager to change the
14. Ifthe 1 voltage is 122 VAC measure the resistance of the heater element between HTR1 and HTR2 Nominal heater resistance ratings are 13 7 ohms for 120V 60 Hz units and 26 7 ohms for 240V 50Hz units A resistance value significantly greater than nominal indicates a defective heater element see Sec 4 10 7 3 Unit heats constantly all units wiring diagrams located in Sec 8 2 On the power supply pc board measure the HEAT signal voltage coming from the main pc board A properly functioning main pc board will produce an active enabled voltage of 0 68 VDC gt A constant 0 67 VDC will cause the heater to be constantly powered even in stand by mode Replace the defective main pc board see Sec 4 3 gt Ifthe HEAT voltage is disabled at 4 6 VDC then measure the heater TRIAC at the HTR1 terminal A constant 122 VAC indicates a defective power supply pc board see Sec 4 5 7 4 Unit does not cool 9002 9012 9102 9112 wiring diagram located in Sec 8 2 On the compressor control pc board measure the COMP signal voltage coming from the main pc board A properly functioning main pc board will produce an active enabled voltage of 0 68 VDC gt Ifthe voltage remains a constant 5 0 VDC replace the defective main pc board see Sec 4 4 gt Ifthe COMP signal is at 0 68 VDC measure the compressor triac output at CH on the compressor control PC board The correct voltage is 122 VAC A voltage significantly lower than 122 VAC
15. MI interference Electromagnetic interference EMI can cause a weak or distorted signal to the controller and may cause incorrect readings or loss of connection with the probe If possible move the circulator away from the source of the EMI 6 10 Computer communication problems Check cable and connection The cable provided with the unit should be used Also check to make sure it is firmly plugged in at both ends Verify the Baud Rate setting is the Check the port settings in the device manager as well as in the same on the computer and controller application being used to communicate with the circulator See section 9 1 for instructions on checking the port settings in device manager Try HyperTerminal HyperTerminal is a free VT 100 terminal emulation program that is included with Windows See section 9 2 for instructions on using HyperTerminal to check communication with the circulator Make sure the port is enabled in the Check with your computer administrator or manufacturer s instructions computers BIOS for information on accessing and configuring COM ports in your computer s BIOS Section 7 Advanced Troubleshooting Note The following voltage values are nominal and should not be considered as exact Actual values will vary due to line voltage differences All voltages are referenced to GROUND 7 1 Unit not pumping all units wiring diagrams located in Sec 8 2 On the power supply PC board measure the PUMP signal
16. and alone baths or to provide precise temperature control of fluids for open or closed loop circulation to external equipment Refrigeration is normally required for operation at temperatures below 30 C All Circulating Bath models feature a reservoir which may be used for immersing samples while the unit is connected to an external device Circulating Bath models are equipped with a 6 13 or 28 liter reservoir All wetted parts are corrosion resistant 300 series stainless steel 2 2 General Description Immersion Circulators Immersion Circulators with Programmable Controllers are designed for use in user supplied reservoirs These units can be used with many sizes and shapes of reservoirs making them extremely versatile and useful for a wide variety of applications They may be used for open and closed loop applications Operation of the Controller is the same as that for Circulating Bath models The Immersion Circulator features an expandable mounting bridge that may be adjusted to span the top of the user supplied reservoir This bridge may be adjusted to widths from 15 to 25 inches 380 to 635 mm 2 3 General Specifications all units Model Type Temperature Amps Amps Range 120v 60Hz 240v 50Hz 9002 9012 9102 9112 20 to 200 C 12 9 9 9502 9512 30 to 200 C 13 9 8 9602 9612 25 to 150 C 13 9 8 9702 9712 40 to 200 C 14 9 9 8002 8012 Ambient 5 to 200 C 11 9 8 8102 8112 Ambient 5 to
17. control pc board measure the signal voltage coming from the main pc board at IO 1 and IO 2 A properly functioning main pc board will produce an active enabled voltage of 0 0 VDC which turns on the PWM solenoid valve gt Ifthe voltage at IO 1 and IO 2 remains a constant 2 5 VDC the PWM solenoid valve will always be off Replace the defective main pc board see Sec 4 4 Ifthe voltage at IO 1 and IO 2 remains a constant 0 0 VDC measure the output signal to the solenoid valve coil across the PLUS and MINUS PDC terminals A properly functioning PWM control pc board will have 23 VDC at the terminals that enables the coil to open the solenoid valve The open solenoid valve then allows refrigerant to flow in the refrigeration system that cools the reservoir fluid If the voltage at the PLUS and MINUS PDC terminals is a constant 0 0 VDC replace the defective PWM control pc board see sec 4 7 gt If the voltage is a constant 28 VDC measure the resistance of the solenoid coil The coil should have a resistance value of 70 ohms If the reading is infinity replace the defective solenoid valve The coil is not a separate component and is included with the solenoid valve Please note that the power supply pc board has no effect on refrigeration system functions other than supplying power to the compressor via terminals CMPG CMPH amp CMPN 7 6 Compressor runs constantly all units wiring diagrams located in Sec 8 2 On the compres
18. eplacing Front Bezel Assembly Main PC Board all units Figure G Disconnecting refrigeration control wires Temperature me probe retaining clip screw d Terminals CMPG CMPH amp CMPN shown with wires disconnected Figure H Disconnecting bezel wiring all units OTP Thermost 4 5 Replacing the Power Supply PC Board all units 1 Remove the controller if applicable and controller cover from the unit see Sec 4 2 amp 4 3 Note the color and location of the wires which are connected to the following terminals OTP1 OTP2 HTR1 HTR2 PBLK PRED PYEL CMPN CMPH CMPG CHASSIS Disconnect the wires along with the ribbon cable at CN2 Remove the 2 screws that secure the PCB to the rear chassis Pull the PCB away from the chassis retaining pins Installation of a new power supply PCB is the reverse of the previous steps Figure J Removing Power Supply PC Board 4 6 Replacing the Compressor Control PC Board 9002 9012 9102 9112 1 Remove the controller and deck plate from the refrigeration assembly along see Sec 4 3 Slide the case assembly from the refrigeration assembly Note the color and location of the wires that are connected to the Compressor Control PC Board Disconnect the wires and remove the screws that secure the PCB to the refrigeration unit Installation of a new compressor control PCB is the reverse of the previous steps Figure K Compressor Control
19. he controller chassis Slide the cover backward and then lift up to remove 4 3 Removing Controller from Unit 9102 9112 9002 9012 9502 9512 9602 9612 9702 9712 Figure F Removing Controller From Unit Remove the 4 knurled nuts that secure the controller to the lower assembly For refrigerated models disconnect the wiring that is routed to the lower refrigeration assembly Lift the controller up and away from the deck plate Note To remove the controller and top deck plate at once remove the 4 Phillips screws located on the outside edge of the deck plate instead of the 4 knurled nuts that hold the controller to the deck plate Remove controller cover see Sec 4 2 For refrigerated units ONLY For Immersion and Heated Circulators proceed to step 3 Note the color and location of the wires which are connected to terminals CMPG CMPH CMPN Disconnect the 3 wires from the lower harness that go to the power supply PCB Disconnect the RJ 45 connector from bezel Loosen the Phillips screw that temperature probe to retaining clip Secures Disconnect the ribbon cable from the bezel For all units Disconnect 2 yellow wires at OTP terminals Remove controller from unit if applicable see Sec 4 2 Remove 4 screws that secure bezel to controller chassis Remove screw and clips that hold OTP thermostat to heater Installation of a new bezel is the reverse of the previous steps 4 4 R
20. he difference between the probe temperature reading and the reference temperature probe Press the Select Set Knob to accept the offset value NOTE Allow the temperature reading at the probe to stabilize before making adjustments NOTE The Calibration User display s remains available only while Controller power is On If the Controller in placed in Standby or main power is disrupted the display s will have to be re enabled by entering the Calibration access password Section 4 Controller 4 1 Resetting unit to Factory Defaults Before performing any service to the unit reset the controller to factory defaults It is our experience that a number of common problems can be resolved by doing so To reset the controller execute the following steps 1 Press the Power Button to turn Controller power off Standby displayed Place the circuit breaker power switch on the rear panel in the Off position display blank Press and hold ESC Button Place the circuit breaker power switch in the On position continue holding ESC Button Release the ESC Button when the language selection menu is displayed Rotate the Select Set Knob until the desired language is highlighted Press the Select Set Knob DU do MP dev NY The Controller will complete the start up sequence and display Standby on the LCD 4 2 Removing Controller Cover all units Figure E Removing Controller Cover Hemove the 2 screws that secure the cover to t
21. ing used it must be insulated and covered to achieve maximum stability otability specifications are based on the circulator s internal reservoir External stability may be higher due to heat loss or gain as the fluid travels away from the circulator Programmable units allow for a remote temperature probe which can increase stability at the remote location Check fluid properties PolyScience specifications are based on tests performed with water or water glycol at 20 C ambient room temperatures Fluid properties such as viscosity density specific gravity etc can greatly effect the performance of the unit Use bypass tube when circulating within the circulator Check tubing size length and look for restrictions and pressure drops Increase Auto Refrigeration setting Set pump speed to maximum Use the Auto Tune Function If the circulator is not being used to circulate fluid to another device or tank the included bypass tubing should always be attached to the inlet and outlet of the unit Blocking the inlet and outlet with plugs does not allow for optimum circulation within the reservoir and can affect stability Achieving good stability with external applications requires that adequate fluid flow be maintained Tubing smaller than 1 4 MPT ID will cause flow restrictions and will affect the performance of the unit Also consider the distance from the circulator and number of external devices being controlled when troublesh
22. is device click Troubleshoot to start the troubleshooter Troubleshoot Cancel Click on the Port Settings tab Check that the settings match as below making sure to set the Bits per second to match the same setting on the circulator Finally click on the Resources tab and ensure that the I O Range and IRQ match the table on bottom of this page If not please contact your IT department or computer manufacturer for assistance If you are using a serial port expansion card please contact the manufacturer to test it s setup and functionality If the settings match hit OK and try communicating with the bath in HyperTerminal Communications Port COM1 Properties xi General Port Settings Driver Details Resources Bits per second Rl Data bits js P M Parity oe Stop bits iti j Flow control oe Advanced Restore Defaults Cancel Communications Port COM1 Properties xi General Port Settings Driver Details Resources Communications Port COM1 Resource settings Resource type Setting 120 Range 03F8 MIRO 04 Setting based Current configuration Use automatic settings Change Setting Conflicting device list Standard port settings Port I O Range IRQ COM1 03F8 03FF COM2 02F8 02FF 9 1 Using HyperTerminal to check RS232 communication Set the unit set point to 22 00 C Launch HyperTermina
23. its 4 3 Removing Controller from Unit heating amp refrigerated units only 4 4 Replacing Front Bezel Assembly Main PC Board all units 4 5 Replacing Power Supply PC Board all units 4 6 Replacing Compressor Control PC Board 9002 9012 9102 9112 4 7 Replacing PWM Control PC Board 9502 9512 9602 9612 9702 9712 4 8 Replacing Pump Motor all units 4 9 Replacing Upper Pump Impeller 4 10 Replacing Heater all units Section 5 Refrigerant Charge for refrigerated units only Section 6 Basic Troubleshooting 7 1 Unit Not Pumping all units 7 2 Unit Not Heating all units 7 3 Unit Heats Constantly all units 7 4 Unit Does Not Cool 9002 9012 7 5 Unit Does Not Cool 9502 9512 9602 9612 9702 9712 7 6 Compressor Runs Constantly all refrigerated units Section 7 Advanced Troubleshooting 7 1 Unit Not Pumping all units 7 2 Unit Not Heating all units 7 3 Unit Heats Constantly all units 7 4 Unit Does Not Cool 9002 9012 9102 9112 7 5 Unit Does Not Cool 9502 9512 9602 9612 9702 9712 7 6 Compressor Runs Constantly all refrigerated units 7 7 Diagnosis Mode Section 8 Technical Drawings 8 1 Refrigeration Assemblies 8 2 Wiring Diagrams amp Schematics Section 9 RS232 9 1 Setting up and verifying COM port settings 9 2 Using HyperTerminal to check RS232 communication Section 1 Identifying Your Unit Within
24. l via the Start menu All Programs Accessories Communications HyperTerminal or go to Start Run and type hypertrm and hit enter Enter test into the Name box then hit OK Connection Description ERU 7 xj New Connection Enter name and choose an icon Far the connector Mame mmm Icon Make sure to select the COM port the unit is connected to via EC C tT P 7 x the Connect Using box then hit OK Note HyperTerminal will automatically detect the unit you must select the correct COM port E us KREMER Enter details Far the phone number that vau want to dial Country region United States af America 1 j Area code Bd Phone number Connect using Cancel Set this window as follows with the Bits per second COM1 Properties matching the Baud Rate setting on the controller then hit OK Port Settings Bits per second EI Data bits Parity Stop bits Flow control Hardware Restore Default In this screen you will need to enter commands to the circulator It is likely that you will not see what you are typing This is normal If you make a mistake do not use the delete or backspace key Simply hit enter and try File Edit View Cal Transfer Help 022 00 you have 2 S F successfully communicated with the unit Other programs should work properly if not please have the user contact the manufacturer of the program for fur
25. ng pump shaft through upper impeller it may be necessary to realign impeller to allow shaft to pass through Figure M Disconnecting Pump Motor Wring Figure N Removing Pump Motor from Controller ERS pump motor to chassis 4 9 Replacing Upper Pump Impeller all units 1 Remove controller from unit if applicable and remove cover see Sec 4 2 amp 4 3 Figure P Pump Assembly 2 Position the controller upside down Remove the screw that secures the lower impeller to the pump shaft Before removing the impeller note the direction the impeller blades are facing Remove lower impeller 3 Remove the 3 screws that secure the impeller cover assembly to the heater standoff 4 Remove impeller bottom cover and plate Before removing the second impeller note the direction the impeller blades are facing 5 HRemove the second impeller and spacer Install the new upper impeller by following the previous steps in reverse 4 10 Replacing Heater all units 1 Remove controller from unit if applicable and remove cover see Sec 4 2 amp 4 3 2 Disconnect the two brown wires from the heater terminals Heater Wires Figure R Loosening Heater Retaining Clip 3 Loosen the Phillips screw that secures the heater to retaining clip Heater retaining clip Figure S Loosening Heater Retaining Clip 4 Position the controller upside down Remove the two screws that secure
26. o load to determine if any cooling is taking place If there is cooling and no unusual noise from the compressor a refrigerant leak is likely Lower pump speeds provide lower flow rates This is especially useful if small diameter tubing is being used or if the fluid path is fairly long Note that circulators in general provide relatively low pressures If the user requires the fluid to be moved over a great distance or up steep inclines consider a chiller or secondary pump Tubing smaller than 1 4 MPT ID will cause flow restrictions and will affect the performance of the unit Also consider the distance from the circulator and number of external devices being controlled when troubleshooting performance problems with the circulator If the circulator is not being used to circulate fluid to another device or tank the included bypass tubing should always be attached to the inlet and outlet of the unit Blocking the inlet and outlet with plugs does not allow for optimum circulation within the reservoir 6 7 Can t Adjust Temperature LLO is displayed on the screen Disable local lockout PolyScience circulators feature a control panel lockout option that can be used to prevent accidental or unwanted changes to the controller settings When active the screen will display LLO or Local Lockout It is enabled and disabled in the same manner Press in and hold the set knob for 10 seconds Check high and low limits The high and low limit
27. ooting performance problems with the circulator Refrigerated units will achieve maximum stability when the refrigeration system is allowed to run even at high temperatures If possible the auto refrigeration setting should be set to the highest possible value Set pump speed to maximum Greater circulation can improve stability especially when circulating to external devices or tanks Digital and Programmable models feature an auto tune function that can be used to optimize the units performance based on the application During the auto tune process the unit will automatically change the set point and pump speed upon completion of the process the original values will be restored 6 2 Accuracy problems displayed temperature varies from that of an external thermometer or device Use calibration offset function Accuracy is the ability of the unit to display temperature within given tolerances to a NIST traceable thermometer The unit includes a calibration offset function which can be used to adjust the displayed temperature to match the users own temperature measurement 6 3 Heating too slowly Check fluid properties Make sure the lid is used and that the fluid path is insulated Check tubing size length and look for restrictions and pressure drops equipment PolyScience specifications are based on tests performed with water or water glycol at 20 C ambient room temperatures Fluid properties such as viscosi
28. settings allow the user to limit the functional temperature range of the circulator If the desired set point is beyond the limit setting the user will not be able to set that temperature Unless other wise required these limits should be set to their maximums 6 8 No power unit shuts down unit trips breaker Check line cord and outlet Ensure that the included line cord is firmly plugged in at both ends Make sure that the power outlet being used provides power that matches the unit requirements The circulator s electrical requirements are located on the serial number tag at the back of the controller Increase safety set point OTP PolyScience circulators include a redundant over temperature feature If the safety set point is set too low the heater will be turned off when the bath temperature reaches the safety set point regardless of the other settings on the control Unless there are specific safety concerns the safety set point should be set at maximum 6 9 External probe issues Circulator must be a Programmable unit External probes can only be attached and used with PolyScience xx12 Programmable circulators Check probe connection Ensure the probe is firmly connected to the EXT PROBE connection on the back of the controller Check that the External probe is If the user wishes to control temperature based on the external probe selected reading the external probe must be selected in the controller Check for E
29. sor control or PWM control pc board measure the COMP signal voltage coming from the main pc board A properly functioning main pc board will produce an active enabled voltage of 0 68 VDC gt constant 0 67 VDC signal voltage will cause the compressor to run constantly even in Standby mode Replace the defective main pc board see Sec 4 4 gt Ifa voltage signal of 4 6 VDC is being provided at COMP measure the voltage at terminal CH A constant 122 VAC signal indicates a defective control pc board see Sec 4 5 7 7 Diagnosis Mode To access the diagnostic display s rotate the Select Set Knob until the Instrument Identification display appears This is the last accessible screen as you rotate the Select Set Knob clockwise With the Instrument ID screen displayed while holding the Timer button press the Select Set Knob and then release both A password box will appear on the Instrument ID screen Polyscience Copyright 2002 2006 Palvzcience The diagnostic access password is DIAGN It is case sensitive and entered by rotating the Select Set Knob until the desired character appears and then pressing the Select Set Knob The cursor will automatically advance to the next field in the password entry display Once the final character is entered rotate the knob counter clockwise and the following diagnostic control screen will be available below Vor tio 5 TL walve O5Se00 Heat 000120 Period 0055 Code vawe Ott
30. ther assistance again Type the following in capital letters RS Hit enter If you see a response of D x If you see a response of you may have mistyped the command Try step 5 again If there is no response try the above steps again with another computer and or cable if possible Connected 0 07 00 Auto detect Auto detect SCROLL CAPS num Capture Print echo
31. tions and pressure drops Use bypass tube when circulating within the circulator maximum PolyScience specifications are based on tests performed with water or water glycol at 20 C ambient room temperatures Fluid properties such as viscosity density specific gravity etc can greatly effect the performance of the unit The included lid should always be used Insulation should be used on the entire fluid path wherever possible If an external tank is being used it must be insulated and covered to reduce the possible heating effect from the ambient air and condensation Achieving responsive cooling with external applications requires that adequate fluid flow be maintained Tubing smaller than 1 4 MPT ID will cause flow restrictions and will affect the performance of the unit Also consider the distance from the circulator and number of external devices being controlled when troubleshooting performance problems with the circulator PolyScience circulators include an auto refrigeration setting that allows the user to specify at what temperatures cooling should be active Unless otherwise specifically required the auto refrigeration setting should be set to the highest temperature Sudden changes in the cooling capacity of the unit without changes in the application often indicate a loss of refrigerant To distinguish between a refrigerant loss and compressor failure listen for unusual noise from the compressor Run the unit with n
32. ts can be performed via the Controller s password protected calibration display s To access the calibration display s rotate the Select Set Knob until the Instrument Identification display appears This is the last accessible screen as you rotate the Select Set Knob counter clockwise With the Instrument ID screen displayed press and hold the Timer Button while also pressing the Select Set Knob A password box will appear on the Instrument ID screen Figure C Password Entry Screen F ssuord nisse The Calibration access password is TUSER It is case sensitive and entered by rotating the Select Set Knob until the desired character appears and then pressing the Select Set Knob The cursor will automatically advance to the next field in the password entry display Once the final character is entered rotate the knob and the following Calibration screen will be available Calibration Ure 35 C Figure D Calibration Screen Offset 0 00 Result 36 84 C Result 6 49 F External Probe Calibration Offset Range 2 00 C On Digital Controllers only the Calibration User Internal Probe Calibration will appear On Programmable Controllers the Calibration User External Probe Calibration screen will also appear if an external probe is connected to the Controller To perform a calibration go to the appropriate Calibration User screen and press the Select Set Knob Rotate the Select Set Knob until the offset value equals t
33. ty density specific gravity etc can greatly effect the performance of the unit The included lid should always be used Insulation should be used on the entire fluid path wherever possible If an external tank is being used it must be insulated and covered to reduce the possible cooling effect from the ambient air Achieving responsive heating with external applications requires that adequate fluid flow be maintained Tubing smaller than 1 4 MPT ID will cause flow restrictions and will affect the performance of the unit Also consider the distance from the circulator and number of external devices being controlled when troubleshooting performance problems with the circulator 6 4 No Heating Increase safety set point OTP PolyScience circulators include a redundant over temperature feature If the safety set point is set too low the heater will be turned off when the bath temperature reaches the safety set point regardless of the other settings on the control Unless there are specific safety concerns the safety set point should be set at 6 5 Cooling too slowly or not enough Check fluid properties Make sure the lid is used and that the fluid path is insulated Check tubing size length and look for restrictions and pressure drops Increase the auto refrigeration setting Check for refrigerant leaks 6 6 Circulation pump problems oet pump speed to maximum Check tubing size length and look for restric
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