Soothes and softens hands, elbows, feet, and more
Contents
1. Instructions PROFESSIONAL GRADE PARAFFIN BATH Soothes and softens hands elbows feet and more Service Manual for Model 4 220 volt Snap Action Thermo stat S A S Assembly Replacement Version 1 0 item no MR81 rev 2 21 05 WR Medical Electronics Co 123 North Second Street Stillwater MN 55082 USA ISO 9001 2000 TE 651 430 1200 800 321 6387 FAX 651 439 9733 www therabathpro com ISO 13485 1996 Contents General Operating Instructions 3 TECHNICAL SPECINICATIONS A 3 Service PrO COUTOS saran san earr E E 3 Equipinent 3 Visual Ins DECDOIL 4 Checking the Temperature of the Bath 4 Removing the Paraffin or Mineral Oil 5 Replacing the Snap Action Thermostat S A S Assembly 7 POS ecquid 8 List of Figures Schematic Wiring Diagram of Therabath Pro 6 Bottom and Side Views of Inside Therabath Pro Tank 7 Cross Section of Case Groove and Tank Lip 8 Important Safeguards READ ALL INSTRUCTIONS BEFORE REPAIRING WARNING Repairs must be done by a qualified technician only Failure to properly repair this device may cause injury to the user This device must be repaired so that2. an aluminum plate and CPVC spacers 5 Disconnect the wires from the old thermostats The connections to the thermostats are push on connectors Remove them by grabbing them with a pliers and pulling them straight off Do not pull on the wires 6 Remove the 10 32 nut between the High Limit and Control thermostats NOTE As sembly may be stuck to the heating pad A twisting motion may help loosen assem bly 7 Discard the old 5 5 Assembly 8 Place the new S A S Assembly over the 10 32 stud on the bottom of the tank The High Limit thermostat with manual reset button must be closest to the end of the heating pad see Figure 2 Thread on the 10 32 nut and torque to 10 inch pounds 9 Attach the short black lead between the thermostats on one side as shown in Figure 1 page 6 10 Attach the long black lead to the High Limit thermostat and attach the joined red and white black lead to the Control thermostat as shown in Figure 1 11 Replace any of the four alignment pins re ferred to in step 2 Figure 3 Cross Section of Case Groove and Tank Lip 12 Reassemble the unit so the insulation is not bunched up and the lip of the tank is prop erly seated in the groove on the case halves all the way around see Figure 3 The wires inside the case must not be pinched be tween the case halves 13 Re thread the four screws removed in step 1 It may be useful to put the unit on its side thread the screw from the top and hold the
3. measurements are critical in determining if the Therabath Pro unit is operating correctly it is important that you use a calibrated ther mometer and that you have the calibration of the thermometer periodically checked If the pilot light remains illuminated continuously for more than the normal cycle time 10 15 minutes if the pilot light does not come on at all or if the unit does not fall within the absolute operating temperature limits the unit is not operating correctly Disconnect the unit remove the paraffin or mineral oil see Removing the Paraffin or Mineral Oil Page 4 Therabath PRO Model TB4 220 volt Service Manual page 5 and follow the procedure for replacing the S A S Assembly page 7 Note If the unit does not heat up at all and you are unable to remove the paraffin the S A S Assembly can be replaced with the solidified paraffin left inside the bath Removing the Paraffin or Mineral Oil CAUTION Do not pour liquid paraffin or mineral oil out of tank as some will run down the joint between the tank and the lip of the case causing the unit to deteriorate and fail Do not use a glass or metal cup to empty the tank as these may scratch the surface of the tank causing it to corrode Removing Mineral Oil If you have used mineral oil to test your Therabath Pro use a plastic or paper cup to empty it Fill the cup by dipping it in the mineral oil then emptying the cup into your container of mineral oil
4. nut from the bottom with a pencil or other object which fits into the recessed hole in the case Tighten the screws until snug Do not overtighten the screws 14 Test the unit for proper operation before using see Checking the Temperature of the Bath page 4 Ordering Parts To order a Snap Action Thermostat 5 5 Assembly Kit or any other needed part please call the factory at 651 430 1200 fax your order to 651 439 9733 or e mail us at paraffinbath wrmed com IMPORTANT Please include the serial number or date of manufacture of the Therabath PRO paraffin bath your shipping address fax number and e mail address if applicable with your order Copyright 1994 2005 by WR Medical Electronics Co All rights reserved Trademarks and registered trademarks of WR Medical Electronics Co include but are not limited to Therabath Theraffin ComforKit ScentFree Therabath Pro and The Paraffin Specialist Thinsulate is a registered trademark of 3M Corporation Page 8 Therabath PRO Model TB4 220 volt Service Manual
5. very accurate thermometer in the bath The thermometer used to measure the bath temperature should be a laboratory quality thermometer for measuring wax melt points such as the one listed in Equipment Needed page 3 Hint Take a sheet of cardboard large enough to cover the entire bath opening and using a pencil punch a hole just large enough for the thermometer probe to fit through Lay the cardboard across the unit and place the thermometer through the hole so that the probe tip is held about 2 5 cm from the bottom of the tank and is centered relative to the sides of the tank Fasten the thermometer in this position using adhesive tape this will eliminate calibration errors due to cold or hot air drafts 3 After inserting the thermometer wait approximately 30 minutes for the temperature of the bath to stabilize Opening and closing the cover and adding a cool object such as a thermometer will cause the temperature in the bath to change In addition the thermometer will need to warm up making necessary the 30 minute wait 4 Record the temperature reading when the pilot light comes on and also record the highest temperature of the bath during one entire heating and cooling cycle approxi mately 10 15 minutes The temperature should read between 51 1 59 4 degrees the absolute operating temperature range 5 Repeat steps 3 and 4 three or four more times to determine if the unit is operating properly CAUTION Because temperature
6. When the bath is nearly empty you can tilt it on its side so that it is easier to remove the last cupfuls of the oil After you have emptied as much as you can with the cup soak up the residue of oil and wipe the tank clean with paper towels Be sure to avoid dripping mineral oil on the seam of the tank and the case so that oil does not enter the inside of the unit Removing Paraffin Wax If you have used Theraffin paraffin to check the operating temperature and the oper ating temperature of the unit is correct the unit can be left on for normal use If the unit is working correctly but you need to relocate the unit or if testing dictates replacement of the 5 5 assembly due to an improper operating temperature the following method should be followed for removing the paraffin e Remove the grille from inside the tank if present e Unplug the Therabath Pro allow the paraffin to solidify overnight e After the paraffin is solid plug in the unit for a few minutes or just until the cake of paraffin loosens from the sides and bottom of the unit e After the paraffin is slightly loosened from the sides unplug the unit e Press down firmly on one end of the paraffin tipping the opposite end up Then lift out the cake of paraffin Be careful to avoid dripping e Blot up any remaining paraffin in the tank with paper towels If any solidified paraffin remains inside or on the outside of the unit soften it carefully with a ha
7. assembly in your Therabath Pro bath call the factory to order a Snap Action Thermostat S A S Assembly Kit IMPORTANT Please provide the serial number of the Therabath Pro unit so the proper kit can be sent The following are instructions for replacing the thermostat assembly in a Therabath Pro unit Refer to Figure 2 located on page 7 for drawings of the inside of the unit 1 Open the Therabath Pro paraffin bath case by removing the four screws holding the case together Take care not to damage the case when you open it 2 Locate the alignment pins in the case halves and note where they are They will be reused when the unit is reassembled Do not remove them unless they are loose Inspect the inside of the Therabath Pro paraffin bath for damage e Check the general appearance of the inside of the case for any problems e Check for matting of any of the fiberglass insulation due to paraffin wax or min eral oil in the insulation continued next page Therabath PRO Model TB4 220 volt Service Manual Page 7 e Check for any loosening of or damage to the heating element pad e Check that all electrical connections are normal see Figure 1 page 6 e Check the condition of all the wires If there are any problems contact the factory for further advice before continuing 4 Locate the S A S Assembly to be replaced see Figure 2 page 7 The thermostats are located on the bottom of the bath They are mounted on
8. er under High Limit S A S 0 125 CPVC spacer under Control S A S four 4 40 x 3 8 nylon screws four 4 40 nylon nuts and one Thermopaper for under the S A S assembly Therabath PRO Model TB4 220 volt Service Manual Page 3 Visual Inspection Inspect the Therabath Pro unit for any of the following problems e Make sure the lid and grille are not damaged If they are you may purchase new ones from the factory See Ordering Parts page 8 e Check the power cord If it is damaged it should be replaced e Check that the white plastic case is not broken and that it fits together properly e Check to see that there are no scratches in the enamel coating on the tank and that there is no rust in the tank If there are any problems contact the factory for further advice Checking the Temperature of the Bath Follow this procedure to test the temperature calibration of the Therabath Pro unit If the temperature of the unit is within tolerances and the unit is operating normally no repairs are necessary Note Mineral oil may be used in place of paraffin for calibration testing purposes Aver age melt time for paraffin is 8 10 hours Average warm up time for mineral oil is 2 3 hours 1 Place 2 72 kg 6 lbs of solid paraffin in the bath or carefully pour 4 liters of mineral oil into the tank Plug in the unit and let it warm up to operating temperature 8 10 hours for paraffin or 2 3 hours for mineral oil 2 Place a
9. ications see the Therabath Pro Operator s Manual which is included with every new unit Technical Specifications 2 72 kg of paraffin wax Average Operating Temperature 52 2 56 7 degrees C e Absolute Operating Temperature 51 1 59 4 degrees C e Paraffin Wax Melt TIME 8 10 hours uiii dU 0 5 kwh per 24 hours Ambient Operating Air Temperature 18 33 29 4 degrees C s Control OSU Bimetallic Snap Action High Limit Safety Thermostat Bimetallic Snap Action manual reset Service Procedures Equipment Needed In order to service a Therabath Pro paraffin bath you will need the following items 3 8 nut driver Flat blade screwdriver with blade width of 4 0 5 5 mm and a shaft length of 10 cm pair of pliers Thermometer We recommend a thermometer with temperature scale range of 32 82 degrees divisions every 0 1 degree and with an immersion depth of 79 mm suitable for measuring paraffin wax melt points Thermometers that meet the ASTM 14C standard are ideal Four liters of mineral oil for testing the Therabath Pro 1 not testing with Theraffin paraffin Snap Action Thermostat S A S Assembly Part Number 840 wo 34020 Includes Control Snap Action Thermostat 5 5 High Limit 5 5 0 090 Aluminum Plate 0 150 CPVC spac
10. ir drier or heat gun and blot it with a paper towel e Clean the unit with a soapy cloth and rinse with a clean cloth wrung out in hot water Then wipe the unit dry Therabath PRO Model TB4 220 volt Service Manual Page 5 TM Figure 1 Schematic Wiring Diagram of Therabath Pro qayg TYXLNAN CI3A SYIM 2 NO HSNd IVNIWSA3L 7 0777 c STWNINYAL e h NTE T A IHA JIDDN3Hd LOV d NS 1912 LIVISDWH3HI JIJDN3Hd LOW d NS TH Le1SOWel3H l g 0t Sd3 LAN ONISN ANVL 01 UNDOND OT 7A 6 TRA ZNSD 3AA 033 8 4 eT 8 4 ST Adee IKSI iD Id TIWHWS SOLISZNNOD JAIA ADV 01 JAA JLIHA OI vd ONILVSH ASIA Ads d4Add Hv 138 HIA NO HSAd JwNIWN3I 3115 1 5 0gEOdI INI 143239 01 SIO3NND2 ei I NU H hd IvNIWH31 NNDO Addin 026921 4902 NIN d3938 OL S1233NNO2 CAXIIS OSEI d302 INENI 193935 DL SIO3NNOO JAA 2 ND HShd WNIWASL Page 6 Therabath PRO Model TB4 220 volt Service Manual Figure 2 Bottom and Side Views of Inside Therabath Pro Tank High Limit Thermostat manual reset Control Thermostat S A S Assembly side view Tank S A S Design side view Grounding Stud Replacing the Snap Action Thermostat S A S Assembly If it is necessary to replace the thermostat
11. the bath maintains the temperature of the paraffin between the temperature limits stated within this manual If the unit is repaired by anyone other than WR Medical Electronics Co personnel all warranties are voided CAUTION Because specialized equipment and techniques are required in order to properly re pair this product we recommend that all units be returned to the factory for repair For repair advice contact the factory service department at WR Medical Electronics Co 123 North Second Street Stillwater MN 55082 USA Phone 651 430 1200 FAX 651 439 9733 E mail paraffinbath wrmed com Web Site www wrmed com Read all of these instructions before attempting to begin repairs The specifications in this manual are subject to change without notice Save These Instructions Page 2 Therabath PRO Model TB4 220 volt Service Manual General Operating Instructions Therabath Pro paraffin baths are designed for a wide variety of medical and cosmetic applications They are normally used in hospitals clinics sports facilities nursing homes beauty salons spas and in the home Users dip their hands elbows or feet into the bath to form a layer of paraffin on their skin The paraffin provides a long lasting heat treatment for the appropriate area After the par affin cools the user removes the solidified paraffin and discards it For more specific user instructions including indications and contraind
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