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Thermal Care Aquatherm RQT Standard Operation, Installation, And Maintenance Manual

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Summary of Contents for Thermal Care Aquatherm RQT Standard

  • Page 2 Thermal Care makes no warranty of any kind with regard to this information, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose.

  • Page 3: Table Of Contents

    ATTENTION: Read This So No One Gets Hurt..............1-3 Zero Energy State (ZES)....................1-4 2-1 Description What is the Aquatherm RQT Standard ................2-2 Typical Applications ....................... 2-2 How the RQT Standard Direct Injection Works .............. 2-3 RQT Standard Control Features vs RQT Premium and RQT Advanced ......2-4 Specifications: RQT Standard ..................
  • Page 4 5-1 Maintenance Maintenance of Your RQT Standard temperature control unit ........5-2 Preventive Maintenance Schedule ................. 5-2 Accessing the RQT Standard temperature control unit Enclosure ........ 5-3 Removing the Pump Motor and Seal ................5-4 Reassembling the Pump Motor and Seal ..............5-7 Resetting Pump Overload ....................
  • Page 5 Appendix B User Parameters ......................B-1 Factory Parameters ......................B-5 Diagnostics ........................B-7 PID Parameters ......................B-11 Appendix C Plumbing Diagrams ......................C-1...
  • Page 6 This page intentionally left blank.

  • Page 7: Introduction

    S E C T I O N In troduc t io n Pu r p o s e o f t h e Use r G ui d e ........1- 2 H o w t h e Gu i d e is O rg an iz ed .

  • Page 8: Purpose Of The User Guide

    Purpose of the User Guide This User Guide describes the Thermal Care RQT Standard temperature control unit and explains step-by-step how to install and operate this equipment. Before installing this product, please take a few moments to read the User Guide and review the diagrams and safety information in the instruction packet.

  • Page 9: Attention: Read This So No One Gets Hurt

    ATTENTION: Read This So No One Gets Hurt We design equipment with the user’s safety in mind. You can avoid the potential hazards identified on this machine by following the procedures outlined below and elsewhere in the User Guide. WARNING: Improper installation, operation, or servicing may result in equipment damage or personal injury.

  • Page 10: Zero Energy State (Zes)

    Zero Energy State (ZES) CAUTION: Before performing maintenance or repairs on this product, you should disconnect and lockout electrical power sources to prevent injury from unexpected energizing or start-up. During maintenance, it is essential that the system be put into a state which eliminates the possibility of components making an unexpected and dangerous movement.

  • Page 11: Description

    S E C T I O N Descr ip t io n Wh a t i s t h e R QT S t an d a rd ........2- 2 Ty p i c al A p p li c a t i on s .

  • Page 12: What Is The Aquatherm Rqt Standard

    What is the RQT Standard The RQT Standard circulates water at a temperature higher than the available water supply, to add or remove heat as needed to maintain a uniform temperature setpoint in the process. The RQT Standard is available in single zone configuration for process heating and cool- ing.

  • Page 13: How The Rqt Standard Direct Injection Works

    How the RQT Standard Direct Injection Works Direct injection models maintain the process temperature by electrically heating and/ or injecting cool water supplied to the RQT Standard by a chiller, tower, or other water source. The temperature of the process fluid is measured as it leaves the unit’s primary heater tank.

  • Page 14: P Remi U M

    RQT Standard Control Features vs RQT Advanced and RQT Premium Units Use the charts below to compare RQT control options and chose the one perfect for your application. Control features on the RQT Standard Control features on the RQT Advanced and RQT Premium RQT Advanced Model RQT Standard...

  • Page 15: Specifications: Rqt Standard

    Specifications: RQT Standard Models RQT Standard Performance characteristics Minimum setpoint temperature °F {°C} 40 {4} Maximum setpoint temperature °F {°C} 250 {121} Minimum operating temperature °F {°C} Approximately 20° {11°} above the cooling water inlet temperature Standard cooling valve size inches {mm} C solenoid valve-3/8 {9.5} (Cv=2.5) Available pump sizes 0.75, 2 {0.56, 1.49 kW}...
  • Page 16 This page intentionally left blank. 2 -6 I D es c r ip t i o n...

  • Page 17: Installation

    S E C T I O N In sta llat i on U n p a c ki n g t h e Bo xe s ..........3- 2 Pre p ar i n g for I n st a ll a t io n .

  • Page 18: Unpacking The Boxes

    Unpacking the Boxes RQT Standard models come fully assembled. If it was specified at the time of the order, the optional purge valve is factory-installed. CAUTION: Lifting To avoid personal injury or damage to the RQT Standard, lift the unit using a forklift or hoist with straps that have been positioned at the center of gravity.

  • Page 19: Preparing For Installation

    Preparing for Installation The RQT Standard is easy to install, if you plan the location and prepare the area properly. WARNING: Improper installation, operation, or servicing may result in equipment damage or personal injury. This equipment should only be installed, adjusted, and serviced by qualified technical personnel who are familiar with the construction, operation, and potential hazards of this type of machine.
  • Page 20 Preparing for Installation (Continued) U Make sure that the cooling source is the appropriate temperature and pres- sure for your application. In most cases, the cooling source is between 40°F {4°C} and 85°F {29°C}. The cooling source fluid pressure must be above the setpoint of the pressure switch in order for the unit to start.
  • Page 21 Preparing for Installation (Continued) The complex nature of water chemistry requires a specialist to evaluate and implement appropriate sensing, measurement and treatment needed for satisfactory performance and life. The recommendations of the specialist may include filtration, monitoring, treatment and control devices. With the ever-changing regulations on water usage and treatment chemicals, the information is usually up-to-date when a specialist in the industry is in- volved.

  • Page 22: Installation - Electrical

    Smaller process line sizes may be used if flowrate does not need to be maximized. Contact Thermal Care for more information about recommendations for your product. Installation - Electrical All wiring must comply with local codes and the National Electric Code (NEC).

  • Page 23: Connecting Process And Water Supply Lines Without Purge

    Install pipe to the rear of the RQT Standard. Use male 1 -inch NPT piping for NOTE: Thermal Care recommends process connections and male 1-inch NPT piping for cooling water connections. Pipe using a second wrench, sometimes and pipe threads must be clean and new. Clean threads with solvent, removing all oil, referred to as a “back-up wrench”, to...

  • Page 24: Connecting Process And Water Supply Lines With Purge

    Connect the compressed air supply to the purge valve assembly. The air pressure how to add a purge valve to your should not exceed 100 psi. Thermal Care strongly recommends a lockable air valve RQT Standard if you did not order it...

  • Page 25: Connecting The Main Power Source

    Connecting the Main Power Source Tools Required Before beginning, note the electrical specifications on the serial tag mounted to the side U Flashlight of the unit. The electrical connection must match these specifications with +/- 10% (+/-15% for 400V/50Hz) maximum voltage variance and <2% imbalance. An improper U 1/8-inch Allen Key power supply could damage the unit as well as seriously injure an operator.

  • Page 26: Testing The Installation

    Testing the Installation WARNING: Only qualified personnel should perform this procedure. Part of this test requires opening the unit while it is energized. Only qualified personnel who have been trained in the use of electrical testing devices and in avoiding the safety hazards involved in safely troubleshooting this type of equipment should perform this test procedure.

  • Page 27: Initial Setup

    These are: The Home Screen, the User Parameter Screen, the Diagnostic Screen, the Warning Explanation Screen, and the Alarm Explanation Screen. There is also a Factory Parameter Screen, which has additional parameters that are accessible by Thermal Care Service for troubleshooting. Refer to the Troubleshooting section of this user guide for more information.

  • Page 28: Changing Temperature Units

    Changing Temperature Units The temperature units parameter allows selection of the displayed temperature units. The available choices are degrees Fahrenheit or Celsius. Stop the RQT Standard. Press the button to enter the User Parameter Screen.  Use the “Next” button to navigate to page 3/6. ...

  • Page 29: Operation

    S E C T I O N Op era t io n Th e RQT S t a n d a rd C on t ro l ........4- 2 H o m e Sc ree n D i sp l ay .

  • Page 30: The Rqt Standard Control

    The RQT Standard Control Process Value Display Start Button The window displays the actual When not running, press this button to start the temperature of fluid entering TCU. The button illuminates amber when the TCU the “To Process” line. is running. Enter Stop Pump Button The Enter key is used to tempo-...

  • Page 31: Home Screen Display

    For more information regarding User Parameters, These parameters refer to Appendix B. should only be adjusted by experienced individuals with guidance from the Thermal Care Service Department. 4- 3 O pe rat ion I...

  • Page 32: Starting The Rqt Standard

    Starting the RQT Standard Before starting the RQT Standard, verify that the system has been installed correctly for your application. See the Installation section. Turn on the water supply to the RQT Standard. The supply pressure must be at least 25 psi for most units. Check for leaks in the cooling water and process fluid lines before continuing.

  • Page 33: Stopping The Rqt Standard

    Stopping the RQT Standard You must shut down the RQT Standard whenever you: • Change the water hookups. • Perform maintenance on the process machine. • Purge the process circuit of the water or fluid. • Change any parameters. • Perform routine or preventive maintenance.

  • Page 34: Using The Mold Purge Option

    Using the Mold Purge Option The RQT Standard can be ordered with an optional purge valve, which clears the process lines of fluid using compressed air. The valve is operated by an optional purge button on the temperature controller. IMPORTANT: Before purging the process lines, be sure that the cooling water source feed is closed.

  • Page 35: Selecting Tuning Parameters

    Selecting Tuning Parameters The controller has three pre-configured tuning parameter sets, one of which should allow optimum temperature control. The following is a description of each of the choices avail- able to an operator. Slow Responding system: Select the slow setting “Large” for large systems for parameter “System Size”. More than 80 gallons {303 liters} of water and more than 5,600 lbs {2,540 kg} of steel would be considered a large system.

  • Page 36: Rqt Standard Control Vent Timer Adjustment

    RQT Standard Control Vent Timer Adjustment When the unit starts, i.e. RUN is pressed, the Vent sequence is initiated. This is to de-aerate the process loop. The venting sequence is divided into two phases governed by user changeable parame- ters. In the first phase, the cooling solenoid valve opens for the set venting sequence time, “Valve Vent”.

  • Page 37: Maintenance

    S E C T I O N Main ten an ce Maintenance of Your RQT Standard ........5-2 Preventive Maintenance Schedule ........5-2 Accessing the RQT Standard Enclosure ......... 5-3 Removing the Pump Motor and Seal ........5-4 Reassembling the Pump Motor and Seal ....... 5-7 Resetting Pump Overload .............

  • Page 38: Preventive Maintenance Schedule

    Maintenance of Your RQT Standard Depending on which features, options, and additions you ordered with your unit, main- tenance procedures and necessities may differ from what is shown in this User Guide. Please note that all illustrations, photos, and instructions are based on a typical configura- tion of a RQT Standard.

  • Page 39: Accessing The Rqt Standard Enclosure

    Accessing the RQT Standard Enclosure Depending on which features, options, and additions you ordered with your RQT Standard, it may appear different and operate differently from the illustrations and photos shown in this User Guide. WARNING: Electrical shock and hot surface hazards. Before attempting maintenance of any kind on the RQT Standard, you must stop the unit, disconnect and lockout the main power supply, and allow the unit to cool to less than 100°...

  • Page 40: Removing The Pump Motor And Seal

    Remove the O-ring between the motor adapter and the casing. Inspect for damage or wear. If in good condition, set aside for re-use. If a new part is needed, contact Thermal Care Parts at 847-966-8560. 5 -4 I M a i n ten a n c e...
  • Page 41 Removing the Pump Motor and Seal (Continued) Remove the dust cap from the bell end motor housing to expose the motor shaft. Using a locking pair of pliers, grip the flat sides of the motor shaft. Remove impeller lock nut using a 5/8 inch deep socket.
  • Page 42 Removing the Pump Motor and Seal (Continued) Slide the rotating half of the shaft seal off of the shaft. Be careful not to contaminate, chip, or scratch seal surfaces if it is to be re-used. Set seal half aside for re-use if appropriate.

  • Page 43: Reassembling The Pump Motor And Seal

    Reassembling the Pump Motor and Seal Tools Required The following procedure can be used on all models with 3/4 to 2 Hp motors for U 9/16-inch wrench reassembly: U Flat-blade screwdriver Gently press stationary half of pump seal into U 5/8 inch deep socket motor adapter being U Blue Loc-Tite (271)
  • Page 44 Reassembling the Pump Motor and Seal (Continued) Align the impeller and screw on to shaft. Place a small amount of Blue Loc-Tite #271 on the shaft end thread. Install the impeller jam nut on the shaft, and tighten to 12 ft-lbs {16.27 N·m}. Use a locking pair of pliers to grip the flat side of the shaft at the motor bell end.

  • Page 45: Resetting Pump Overload

    Resetting Pump Overload The pump motor overload is located inside the unit’s electrical enclosure. Disconnect and lockout the main power. Open the electrical enclosure door. Turn the screw on the front panel counterclockwise to open. Check the overload. Press the blue button to attempt to reset the overload.

  • Page 46: Replacing The Plc

    Replacing the PLC The PLC used in the RQT Standard can be removed from the supporting DIN rail for easy replacement. To remove the controller: Disconnect and lockout the main power supply. IMPORTANT: Always refer to the wiring diagrams that came with your Disconnect all connectors on the rear of the controller.

  • Page 47: Replacing The Heater Contactor

    Replacing the Heater Contactor WARNING: Electrical Shock Hazard Only qualified service personnel who have been trained on electrical testing and the IMPORTANT: Always refer to the procedures for avoiding hazards should diagnose or correct problems. wiring diagrams that came with your RQT Standard to locate specific The heater contactors should be replaced if: electrical components.

  • Page 48: Replacing The Rtd

    Replacing the RTD WARNING: Hot Surfaces Allow the RQT Standard to cool to below 100° F {38° C} before servicing the unit. To replace an RTD: Disconnect and lockout the main power. Drain the unit of all water through the drain plug in the rear of the unit.

  • Page 49: Repairing Cooling Valves

    Repairing Cooling Valves Every RQT Standard has a valve assembly that controls the cooling water out flow. Occa- sionally, this valve assembly may need to be cleaned, if clogged with debris, or replaced. The steps below detail this procedure. Cooling valves also are found on the optional purge valve.

  • Page 50: Disassembly Of Optional Direct Acting Solenoid Valves

    Disassembly of Optional Direct Acting Solenoid Valves Mounting Screw Disassembly Loosen the mounting screws. The coil assembly, seal, return spring, armature assembly and body can be removed. Coil Assembly Assembly Seal Common to N.C. and N.O. Return Spring Loosen the mounting screws. The coil assembly, seal, return spring, armature assembly and body can be removed.

  • Page 51: Disassembly Of Optional Pilot Operated Solenoid Valves

    Disassembly of Optional Pilot Operated Solenoid Valves NOTE: Within the valve body and coil assembly there are no user serviceable parts. Clip Name Plate Solenoid Coil Assembly 5- 15 M ainte n an c e I...

  • Page 52: Replacing Immersion Heaters

    Replacing Immersion Heaters WARNING: Electrical Shock and Hot Surface Hazard Before attempting maintenance of any kind on the RQT Standard, you must stop the unit; disconnect and lockout the main power supply; and allow the unit to cool to 100°F {38°C}.
  • Page 53 Replacing Immersion Heaters (Cont’d) Lift the heating element out of the heater tank. Lift the element straight up. NOTE: Illustration for reference Heater lid only. May not represent current design. Immersion Heater O-ring flange and O-ring Clean the heater tank. Remove any rust or solids that may have built up before inserting the heater elements.

  • Page 54: Removing The Pump

    Removing the Pump WARNING: Electrical Shock and Hot Surface Hazard Before attempting maintenance of any kind on the RQT Standard, you must stop the unit; disconnect and lockout the main power supply; and allow the unit to cool to 100° F NOTE: Refer to the Zero Energy {38°...

  • Page 55: Troubleshooting

    S E C T I O N Tro u b l e sh o ot i n g Be fo re Be g in n i n g ........... . 6 - 2 A Few Word s o f C a u t io n .

  • Page 56: Before Beginning

    Additional manuals and prints for ment. These are the best reference for correcting a problem. The diagrams will note your Thermal Care equipment may be any custom features or options not covered in this User Guide. ordered through the Customer Service or Parts Department for a nominal fee.

  • Page 57: Identifying The Cause Of A Problem

    Identifying the Cause of a Problem NOTE: Additional troubleshooting The Troubleshooting section covers problems directly related to the operation and main- help can be found in the documentation tenance of the RQT Standard. This section does not provide solutions to problems that manuals included with this User Guide.

  • Page 58: Controller Warnings And Alarms

    Controller Warnings and Alarms The RQT Standard classifies machine faults as either warnings or alarms: • Alarms: Problem is severe enough to shut down a running RQT Standard or prevent operation. • Warning: RQT Standard can continue to run even though there is a minor malfunction detected in the machine.
  • Page 59 RQT Standard Control Alarms (Continued) The RQT Standard has detected a problem that could lead to equipment damage or personal injury if it is not corrected. X The controller displays a solid alarm LED or an error message indicating the cause of the problem. Alarm Possible Cause Solution...
  • Page 60 RQT Standard Control Alarms (Continued) The RQT Standard has detected a problem that could lead to equipment damage or personal injury if it is not corrected. X The controller displays a solid alarm LED or an error message indicating the cause of the problem. Alarm Possible Cause Solution...
  • Page 61 Pump Contactor is Welded Closed Contact Thermal Care Parts Phone: 847-966-8560 The pump contactor is NOT disconnect- ing the pump motor when told to open by the temperature controller.
  • Page 62 RQT Standard Control Alarms (Continued) The RQT Standard has detected a problem that could lead to equipment damage or personal injury if it is not corrected. X The controller displays a solid alarm LED or an error message indicating the cause of the problem. Alarm Possible Cause Solution...
  • Page 63 RQT Standard Control Alarms (Continued) The RQT Standard has detected a problem that could lead to equipment damage or personal injury if it is not corrected. X The controller displays a solid alarm LED or an error message indicating the cause of the problem. Alarm Possible Cause Solution...
  • Page 64 RQT Standard Control Alarms (Continued) The RQT Standard has detected a problem that could lead to equipment damage or personal injury if it is not corrected. X The controller displays a solid alarm LED or an error message indicating the cause of the problem. Alarm Possible Cause Solution...
  • Page 65 RQT Standard Control Alarms (Continued) The RQT Standard has detected a problem that could lead to equipment damage or personal injury if it is not corrected. X The controller displays a solid alarm LED or an error message indicating the cause of the problem. Alarm Possible Cause Solution...
  • Page 66 RQT Standard Control Alarms (Continued) The RQT Standard has detected a problem that could lead to equipment damage or personal injury if it is not corrected. X The controller displays a solid alarm LED or an error message indicating the cause of the problem. Alarm Possible Cause Solution...
  • Page 67 RQT Standard Control Alarms (Continued) The RQT Standard has detected a problem that could lead to equipment damage or personal injury if it is not corrected. X The controller displays a solid alarm LED or an error message indicating the cause of the problem. Alarm Possible Cause Solution...
  • Page 68 RQT Standard Control Alarms (Continued) The RQT Standard has detected a problem that could lead to equipment damage or personal injury if it is not corrected. X The controller displays a solid alarm LED or an error message indicating the cause of the problem. Alarm Possible Cause Solution...

  • Page 69: Rqt Standard Control Alarm/Warnings

    RQT Standard Control Alarm/Warnings The RQT Standard has detected a problem that could potentially lead to equipment damage or personal injury if it is not corrected. X The controller displays a flashing/solid alarm LED or an error message indicating the cause of the problem. Alarm or Warning Possible Cause Solution...
  • Page 70 RQT Standard Control Alarm/Warnings (Continued) The RQT Standard has detected a problem that could potentially lead to equipment damage or personal injury if it is not corrected. X The controller displays a flashing/solid alarm LED or an error message indicating the cause of the problem. Alarm or Warning Possible Cause Solution...
  • Page 71 RQT Standard Control Alarm/Warnings (Continued) The RQT Standard has detected a problem that could potentially lead to equipment damage or personal injury if it is not corrected. X The controller displays a flashing/solid alarm LED or an error message indicating the cause of the problem. Alarm or Warning Possible Cause Solution...
  • Page 72 RQT Standard Control Alarm/Warnings (Continued) The RQT Standard has detected a problem that could potentially lead to equipment damage or personal injury if it is not corrected. X The controller displays a flashing/solid alarm LED or an error message indicating the cause of the problem. Alarm or Warning Possible Cause Solution...
  • Page 73 Has the RTD itself failed or sustained If damaged, replace the RTD. ing or has a break in the wiring. physical damage? Contact Thermal Care Parts WARNING: Only qualified electrical Phone: 847-966-8560 service personnel should examine and correct problems that require open- ing the unit’s electrical enclosure or...
  • Page 74 Has the RTD itself failed or sustained If damaged, replace the RTD. service personnel should examine and physical damage? correct problems that require open- Contact Thermal Care Parts and Service ing the unit’s electrical enclosure or checking electrical current. If Warning (From-Process probe not controlling): As a temporary solution (with reduced performance), you may choose to make the To-Process probe controlling.
  • Page 75 RTD input controller. checking electrical current. channel? Contact Thermal Care Parts and Service If Warning (From-Process probe not controlling): X Fault LED flashes. X RQT Standard will run normally. As a temporary solution (with reduced performance), you may choose to make the To-Process probe controlling.
  • Page 76 RQT Standard Control Alarm/Warnings (Continued) The RQT Standard has detected a problem that could potentially lead to equipment damage or personal injury if it is not corrected. X The controller displays a flashing/solid alarm LED or an error message indicating the cause of the problem. Alarm or Warning Possible Cause Solution...
  • Page 77 RQT Standard Control Alarm/Warnings (Continued) The RQT Standard has detected a problem that could potentially lead to equipment damage or personal injury if it is not corrected. X The controller displays a flashing/solid alarm LED or an error message indicating the cause of the problem. Alarm or Warning Possible Cause Solution...

  • Page 78: Rqt Standard Control Warnings

    RQT Standard will automati- cally resume normal operation. Flash Memory Error Something abnormal may be occurring Contact Thermal Care Customer Service in the temperature controller. 847-966-2636. Excessive Flash Memory Writes The flash memory is being written to excessively.
  • Page 79 TCU Mis-applied. If application requires continuous heat- ing, this is not the correct TCU model. X Fault LED flashes. Please reach out to your Thermal Care representative. PIO Loop Mistuned. Contact Thermal Care Customer Service Heater Cyclic Rate...

  • Page 80: Checking The Rtd

    Checking the RTD WARNING: Electrical Shock Hazard Only qualified service personnel who have been trained on electrical testing and the procedures for avoiding the hazards should diagnose or correct problems that require opening the unit with power on. The RQT Standard uses Pt1000 RTDs, to monitor the to process and from process tem- peratures.
  • Page 81 Checking the RTD (Cont’d) Pt1000 Temp Resistance Resistance at Resistance at Resistance at Resistance at Resistance at Resistance at Resistance at Resistance at Resistance at Temp at T T+1°F T+2°F T+3°F T+4°F T+5°F T+6°F T+7°F T+8°F T+9°F °F Ohms Ohms Ohms Ohms Ohms...
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  • Page 83: We're Here To Help

    Ap pen d i x A We’re Here to Help Thermal Care has made a large investment in customer support. Our service experts are available to help with any problem you might have installing and operating your equip- ment. Your Thermal Care sales representative also can help analyze the nature of your problem, assuring that it did not result from misapplication or improper use.

  • Page 85: User Parameters

    Ap pe nd ix B User Parameters The RQT Standard will not operate correctly if certain factory-set parameters are changed. Parameters should be changed only by qualified technical personnel who are familiar with the operation of this type of equipment. If the RQT Standard does not appear to be working correctly, verify the parameters against the list of factory settings.
  • Page 86 User Parameters (Continued) Category Screen Parameter (Character Default Range Description Number Limited) 32-260 User configurable maximum temperature alarm. 260 ⁰F High Temp Alm ⁰F 32-260 User configurable minimum temperature alarm. 32 ⁰F Low Temp Alm ⁰F If the TCU has paused operation due to low process temperature, this is how long it will wait before automati- 1500 0-60000...
  • Page 87 User Parameters (Continued) Category Screen Parameter (Character Default Range Description Number Limited) Upon cold startup, the TCU will flush the process loop with fresh fluid to promote de-aeration. The pump will not run during this time period. Once finished, it will start the Valve Vent 30 sec 5-180 sec...
  • Page 88 User Parameters (Continued) Category Screen Parameter (Character Default Range Description Number Limited) Allows the user to select how the TCU responds to a devia- tion condition (as defined in screen 1/6 above). Warnings None Deviation Actn Warn Warn are visible on the screen, but have no affect on machine Alarm operation.

  • Page 89: Factory Parameters

    Factory Parameters The RQT Standard will not operate correctly if certain factory-set parameters are changed. Parameters should be changed only by qualified technical personnel who are familiar with the operation of this type of equipment. If the RQT Standard does not appear to be working correctly, verify the parameters against the list of factory settings.
  • Page 90 Factory Parameters (Continued) Category Screen Parameter (Character Default Range Description Number Limited) Time base for solenoid cooling valve. If Cooling Cycle is 0.5-60.0 set to 5.0s, and the unit is cooling at 50% capacity, the Cooling Cycle 5.0 sec solenoid cooling valve will alternate between 2.5s on and 2.5s off.

  • Page 91: Diagnostics

    Diagnostics The RQT Standard is equipped with extensive diagnostic screens to assist the user and/or the factory in: • Troubleshooting • Installation • Preventative maintenance Category Screen Parameter (Character Input/ Device Description Description Number Limited) Output Pres Swtch[1] Pressure Switch Pressure switch input.
  • Page 92 Diagnostics (Continued) Category Screen Parameter (Character Input/ Device Description Description Number Limited) Output Pump motor runtime displayed in units of x100 hours. Pump Pump Pump contactor actuations displayed in units of x100 operations.* Heater runtime displayed in units of x100 hours. Heater 6/19 Heater Heater...
  • Page 93 Diagnostics (Continued) Category Screen Parameter (Character Input/ Device Description Description Number Limited) Output The number of times the memory has been written to. Mem W-x10000 Memory Writes Shown in units of x10,000. How long it takes the controller to run the entire program Loop Time-ms PLC Loop Time and loop back around to begin again.
  • Page 94 Diagnostics (Continued) Category Screen Parameter (Character Input/ Device Description Description Number Limited) Output Temperature Over Number of times the TCU has alarmed due to the process Tmp Ovr Limit Factory Limit Alarms temperature exceeding the factory high limit. Temperature Under Number of times the TCU has alarmed due to the process Tmp Und Limit Factory Limit Alarms...
  • Page 95 *One on/off cycle is equal to one operation PID Parameters The Thermal Care RQT Standard features a PID (“proportional-integral-derivative”) control-loop algorithm imple- mented in the temperature controller. This algorithm is used to achieve the proper temperature of the process fluid quickly and accurately.

  • Page 96: Pid Parameters

    PID Parameters (Continued) Integral Using only proportional control will cause the RQT Standard to have steady-state error (it will never exactly reach setpoint). Integral response is used to eliminate this undesirable condition. Integral logic introduces the awareness of the passage of time into the logic by looking into the past—and observing how far the process has been from the setpoint over time.
  • Page 97 PID Parameters (Continued) STEPS: To Set Default PID Parameters Access User Parameters window by tapping on the button corresponding to the wrench icon and then us- ing the left right arrows to navigate to the 8th window screen. Use the “enter” button to move down the menu to Load Defaults. Then use the up and down arrows to select “Yes”...
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  • Page 99: Plumbing Diagrams

    Ap pe nd ix C Plumbing Diagrams Direct Injection RQT Standard In a direct injection arrangement, the cooling fluid is directly injected into the process loop whenever cooling is required. The immersion heater provides heat directly into the process fluid whenever needed. From ...
  • Page 100 Plumbing Diagrams (Cont’d) I A ppe n d ix C...
  • Page 101 Always consult with Thermal Care for the most accurate information when it comes to what parts should be used on your piece of Thermal Care equipment. Having your serial number available when you contact Thermal Care ensures R QT S t an dard that you get the correct parts for your equipment.
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  • Page 103  Niles, IL 60714    New Equipment Sales Customer Service Parts Department 5680 W. Jarvis Ave.  •        847‐966‐2636   847‐966‐9358(fax)  847‐966‐2260  847‐966‐2260   847‐966‐8560  •      service@thermalcare.com    www.thermalcare.com  sales@thermalcare.com  tcparts@thermalcare.com  February 2023 RQT Standard TCUGH003‐1022-R5...

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