110 Volt Unit
Contents
1. A sive All Instructions PROFESSIONAL GRADE PARAFFIN BATH Service Manual for Models TB5 and TB2 110 volt Snap Action Thermostat S A S Assembly Replacement Version 1 0 item no MR80 rev 2 21 05 l C WR Medical Electronics Co 123 North Second Street Stillwater MN 55082 USA ISO 9001 2000 on TEL 651 430 1200 800 321 6387 Fax 651 439 9733 www therabathpro com ISO 13485 1996 Contents General Operating Instructions esseseesessereeseeseesesseseeseeseseeseeseesesseseesee 3 Technical Specifications s seesseemmeenenaeennesneesesanesn 3 Service Procedures 3555 0 acseusieaiesdesessstuevonansi si eddantsntesesstvudedataesusshesumisnstbetess 3 Equipment Needed ik 3 Vistial Inspection HA 4 Checking the Temperature of the Bath ccssssssssssssssssssssesecesessssessesesssseeeees 4 Removing the Paraffin or Mineral Oil csscscsssssssssssssessssetscssessstseseseessees 5 Replacing the Snap Action Thermostat S A S Assembly sccccesseseees 7 Ordering RATES 552 5 coi iainsostsctesicnssdinoatbsaconcdedeiooasedades cabasanssussedaycensdingnediadesdesy 8 List of Figures Schematic Wiring Diagram of Therabath 00 ccccnccnnnnnnnnnnnnrninnniinnnnns Bottom and Side Views of Inside Therabath Tank Cross Section of Case Groove and Tank Lip essessessesseesessesscoreesessesscoseesessesse Important Safeg2. actory to order a Snap Action Thermostat S A S Assembly Kit IMPORTANT Please provide the serial number of the Therabath unit so the proper kit can be sent The following are instructions for replacing the thermostat assembly in a Therabath unit Refer to Figure 2 located on page 7 for drawings of the inside of the unit 1 Open the Therabath 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 3 Inspect the inside of the Therabath 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 Model TB5 and Therabath Pro Model TB2 110 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 an aluminum plate and CPVC spacers 5 Disc
3. ank 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 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 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 S A S 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 and allow the paraffin to solidify overnight e After the paraffin is solid plug in the unit for a few minutes or just un
4. d 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 Figure 3 Cross Section of Case Groove and Tank Lip Ordering Parts To order a Snap Action Thermostat S A S 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 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 Model TB5 and Therabath Pro Model TB2 110 volt Service Manual
5. e for measuring paraffin wax melt points Thermometers that meet the ASTM 14C standard are ideal e One gallon 4 liters of mineral oil for testing the Therabath if not testing with Theraffin paraffin e Snap Action Thermostat S A S Assembly Part Number 840 wo 34020 Includes Control Snap Action Thermostat S A S High Limit S A S 0 090 Aluminum Plate 0 150 CPVC spacer 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 Model TB5 and Therabath Pro Model TB2 110 volt Service Manual Page 3 Visual Inspection Inspect the Therabath 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 unit If the temperature of the unit is within tolerances and the unit is operating normally no repairs are necessary Note Mineral oil
6. it 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 124 139 degrees F 51 1 59 4 C 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 measurements are critical in determining if the Therabath unit is operating correctly it is important that you use a calibrated thermom eter 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 Model TB5 and Therabath Pro Model TB2 110 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 t
7. 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 1 gallon 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 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 1 inch 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 adhe sive 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 requiring the 30 minute wa
8. onnect 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 Twisting may help loosen the assembly 7 Discard the old S A S 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 7 inch 17 8 cm black and white black lead from the heating pad to the Control thermostat as shown in Figure 1 11 Replace any of the four alignment pins re ferred to in step 2 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 between 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 nut from the bottom with a pencil or other object which fits into the recesse
9. orm 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 e For more specific user instructions including indications and contraindications see the Therabath Operator s Manual which is included with every new unit Technical Specifications Unit Capacity mienzi 6 lbs 2 72 kg of paraffin wax e Average Operating Temperature 126 134 degrees F 52 2 56 7 C e Absolute Operating Temperature 124 139 degrees F 51 1 59 4 C e Paraffin Wax Melt Time lt w w w e 8 10 hours Energy Usage AAA 0 5 kwh per 24 hours e Ambient Operating Air Temperature 65 85 degrees F 18 33 29 4 C Control Thermostat sw wwswswmswemmamammaaza Bimetallic Snap Action e High Limit Safety Thermostat Bimetallic Snap Action manual reset Service Procedures Equipment Needed In order to service a Therabath paraffin bath you will need the following items e 3 8 inch 0 9525 cm nut driver e Flat blade screwdriver with blade width of 4 0 5 5 mm and a shaft length of 10 cm e A pair of pliers e A thermometer We recommend a thermometer with temperature scale range of 80 180 degrees F approximately 32 82 C divisions every 0 1 degree and with an im mersion depth of 3 15 inches 79 mm suitabl
10. til 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 hair 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 Model TB5 and Therabath Pro Model TB2 110 volt Service Manual Page 5 Figure 1 Schematic Wiring Diagram of 110 volt s gt z 3 3 a hr 4 Ea gt m K p i x i z gt ry A z W z z wA 5 g e D mn lt ee wv gt 3 u x z ai i 5 5 lt p al E i oF t p Eia ri p x 5 mY gt t J l Page 6 Therabath Model TB5 and Therabath Pro Model TB2 110 volt Service Manual Figure 2 Bottom and Side Views of Inside Therabath 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 assembly in your Therabath bath call the f
11. uards READ ALLINSTRUCTIONS BEFORE REPAIRING WARNING Repairs must be done by a qualified technician only e Failure to properly repair this device may cause injury to the user e This device must be repaired so that the bath maintains the temperature of the paraffin between the temperature limits stated within this manual e PLEASE NOTE If the unit is repaired by anyone other than WR Medical Elec tronics Co personnel all warranties are voided CAUTION e 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 e 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 e Read all of these instructions before attempting to begin repairs e The specifications in this manual are subject to change without notice Save These Instructions Page 2 Therabath Model TB5 and Therabath Pro Model TB2 110 volt Service Manual General Operating Instructions e Therabath paraffin baths are designed for a wide variety of medical and cosmetic appli cations They are normally used in hospitals clinics sports facilities nursing homes beauty salons spas and in the home e Users dip their hands elbows or feet into the bath to f
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