Full-Size TU Service Manual (7-09)
Contents
1. Traulsen Refrigeration SERVICE MANUAL Instructions For The Troubleshooting And Repair Of Traulsen Full Size Undercounter Refrigerators and Freezers TU044HT TUO72HT amp TU100HT Refrigerator Models TUO44LT amp TUO72LT Freezer Models J A mem A E 3 m en ES maman p 7 07 aum ausum wy This manual is prepared for the use of trained Authorized Traulsen Service Agents and should not be used by those not properly qualified This manual is not intended to be all encompassing but is written to supplement the formal training on the job experience and other product knowledge acquired by Authorized Traulsen Service Agents Before proceeding with any work you should read in its entirety the repair procedure you wish to perform to determine if you have the necessary tools instruments and skills required to perform the procedure Only a trained Authorized Traulsen Service Agent should perform procedures for which you do not have the necessary tools instruments and skills Reproduction or other use of this manual without the express written consent of Traulsen is prohibited FORM NUMBER TR35912 REV 7 09 P N 375 60297 00 TABLE OF CONTENTS Il THE SERIAL TAG Page 1 V CONDENSER FAN MOTOR OR BLADE Page 4 Il GENERAL INFORMATION Page 2 VI CONDENSER COIL Page 5 a Introduction Page 2 Vil EVAPORATOR FAN Page 5 b Model Designations Page 2 Vill COMPRESSOR Page 6 c Wiring Diagram Page 2 IX WIRING DIAGRAM Page 7 d Installatio2. Install a new drier Step 8 Charge the refrigeration system as outlined un der CHARGING SYSTEM in SERVICE PROCEDURES AND ADJUSTMENTS Step 9 Reconnect power to the unit Step 10 Reset the microprocessor control defrost time settings to the correct time of the day VII EVAPORATOR FAN Vil a REPLACEMENT INSTRUCTIONS Disconnect the electrical power to the machine and follow lockout tag out procedures See section Ill b for removal of evaporator housing cover Illustration VII 1 Remove the steel evaporator fan assembly retaining pin from the evaporator housing Illustration VII 2 Remove evaporator fan housing amounting screws to allow for removal of entire evaporator fan motor as sembly Illustration VII 3 Disconnect electrical Vill COMPRESSOR VIII a COMPRESSOR Disconnect the electrical power to the machine and follow lockout tag out procedures This procedure requires the use of re frigerants be certain the work area is well ventilated Safety goggles and gloves shall be worn since refrig erants may cause burns to the skin NOTE Compressor models will vary with each cabinet model but the basic removal instructions can be fol lowed Step 1 Recover the refrigerant in the system following the current EPA Guidelines for refrigerant recovery NOTE The use of reclaiming equipment is required Step 2 Remove the compressor junction box cover Step 3 Disconnect all wire
3. Close low side valve on gauge manifold and the valve on the refrigerant bottle 6 Disconnect refrigerant bottle and connect nitrogen bottle X c REFRIGERANT LEAK CHECK cont d NOTE The use of a nitrogen regulator is required 7 Set output valve on nitrogen valve to 120 psi 8 Open nitrogen bottle valve and low side gauge manifold valve Allow pressure to equalize 9 Shut off both valves and disconnect nitrogen bottle 10 Use a leak detector or a thick soapy solution and check for leaks at all tubing connections A If leaks are found repair leaks and repeat process B If no leaks are found evacuate system as outlined in section X d EVACUATING SYSTEM 11 Charge the system by weighing in the exact charge and check for proper operation X d EVACUATING SYSTEM Introduction Refrigeration reclaiming equipment is required Our goal in system evacuation is to remove all the non condensables possible No evacuation method will remove 100 of the mois ture and air from within the refrigeration circuit Because of this guidelines and methods must be developed and adhered to ensuring only harmless amounts of contaminants remain in the system GUIDELINES Do not pressurize system above 150 PSIG prior to evacuation or during leak test procedures e Use only a two stage vacuum pump 2 CFM or greater and electronic micron e Evacuate from high and low sides of the system e No chemical additive or alcohol
4. repair or adjustment of TUOAAHT TUO72HT TU100HT 1 6 the INTELA TRAUL microprocessor control please refer to it s EN manual form number TR35705 or contact our Service Depart ment at 800 825 8220 Il j CONTROL LOCATION BTU HR On all TU Series Full Size Undercounter models the micropro Cabinet cessor control is located on the louver assembly right above the Amp Draw Traulsen nameplate The louver refrigeration system are mounted standard on the left side but as an option are available on the Refri t 19 19 19 geran right side as well See figure 3 Charge oz I Il n SPECIFICATIONS FREEZER rear ruozzur Condensing Unit 1970 1970 BTU HR Cabinet Amp Draw R 404a R 404a Does Refrigerant Charge 1 1 OZ ll KKOPERATING DATA CHART REFRIGERATOR 100 F Ill SERVICE ACCESS 35 PSIG S0 PSIG Ill a SYSTEM Discharge Pressure 200 PSIG 295 PSIG To remove the louver assembly first place your hands Discharge Temperature 415 F under the louver panel and lift this up off the bracket and then away from the cabinet face NOTE Figure below shown with optional refrigerator drawers Il OPERATING DATA CHART FREEZER Discharge Temperature 107 F Figure 4 Ill SERVICE ACCESS cont d Ill a SYSTEM cont d To gain full access to the refrigeration system from the side remove the side cover by removing the screws Illustration Ill 1 When finished place the louver as
5. to 200 microns X e CHARGING SYSTEM Disconnect the electrical power to the machine at the main circuit box Place a tag on the circuit box indicat ing the circuit is being serviced This procedure requires the use of refrigerants be certain the work area is well ventilated Safety goggles and gloves shall be worn since refrigerants may cause burns to the skin 1 Access the refrigeration system 2 Attach gauge manifold set to system low side to process tube on the compressor and the high side to the process tube on the drier NOTE See SYSTEM ACCESS 3 Be sure the system is properly leak checked and evacuated before charging as outlined under LEAK CHECK and EVACU ATING SYSTEM 4 Make certain both valves are closed on the gauge manifold Open the valve on the bottle Bleed charging hose at the manifold gauge to remove air NOTE Initially charge system through high side to prevent liquid refrigerant from reaching compressor 5 Open the high side gauge valve red Allow refrigerant to flow into the system until the nameplate charge is reached or until the high side will not accept any more refrigerant At this point shut the gauge and bottle valves 6 Reconnect power to the unit and check for proper operation and high pressure leaks X e CHARGING SYSTEM cont d 7 Add the remaining amount of refrigeration charge through the low side with the compressor running 8 Check for proper operation and l
6. MUST NOT be installed until after system clean up procedures have been completed 1 Remove the burned out compressor as outlined under COMPRESSOR 2 Remove the capillary tube metering device 3 Purge nitrogen through the high and low sides of system until moisture and contaminated oil has been removed from the remaining components of the system 4 Reassemble refrigeration system and add a CW style liquid drier and a suction line drier 5 Purge nitrogen through the high and low sides of system for 5 minutes 6 Evacuate refrigeration as outlined under EVACUATING SYSTEM for 30 minutes Repeat nitrogen purge and evacuate two more times 7 Charge system as outlined under CHARGING SYSTEM Allow for the increased liquid capacity of the liquid line drier 8 Reconnect power and check for proper operation 9 Disconnect power and install any panels removed 10 Return between 24 and 48 hours to recover gas replace liquid line drier with a CW style drier Remove the suction drier but do not replace 11 Evacuate and charge system as outlined under EVACUATING SYSTEM and CHARGING SYSTEM X g HEATER TEST DRAWER PERIMETER HEATER 1 Access the orange heater power wire connected to terminal 4 of the relay module 2 Plug the unit in and verify 120vac supply to heater from the orange heater power wire 3 Check for nominal amp draw 25 5 amps 4 Disconnect power check for continuity using an Ohm meter fr
7. OJO OJO co co OJO Ojo I Drawer Face Assembly C1 C1 O O ER O O Drawer Frame Assembly ep m D O O C1 RB O Drawer Frame Insert oO IN I O O N P O O Drawer Gasket Drawer Roller D CO ITI a O O C1 OO O O Shelf Model TU044 a Shelf Chrome Shelf Model TU072 2 section amp TU100 3 section a Shelf Chrome 2 amp 3 Section Left Hand 340 60231 02 Shelf Chrome 2 amp 3 Section Right Hand 340 60231 03 Shelf Model TU100 3 section center shelf ee Louver All Modes o ol Microprocessor Control AlModels 00000 337 60403 00 337 60405 01 337 60407 01 337 60317 00 s13 XIV SERVICE ASSISTANCE XIV a SERVICE INFORMATION NOTE Before calling for service please check the following Is the electrical cord plugged in Is the fuse OK or circuit breaker on Clean condenser coil Is the power switch on Reset microprocessor control values to factory defaults If after checking the above items and the unit is still not operating properly please contact an authorized Traulsen service agent A complete list of authorized service agents was provided along with your Traulsen unit If you cannot locate this you may also obtain the name of a service agent from the Tech Service page of our website www traulsen com If service is not satisfactory please contact our in house service department at Trau
8. and compresses the low pressure vapor into high pressure vapor 2 Evaporator Fan Draws air across condenser coil to aid in removing heat from the refrigerant and moves air across compressor to aid in cooling the compressor 3 Start Capacitor Stores electrical charge which helps start the compressor motor 4 Run Capacitor Helps keep the compressor motor running after starting 5 Microprocessor Control Pelis the functions of the 1 defrost timer 2 high limit switch 3 thermometer and 4 thermostat 6 Drawer Perimeter Heater 7 Contactor Relay XI d INSTALLATION OF THE SENSORS There are two sensors used inside the cabinet The first one is the Cabinet Sensor that is used to cycle the compressor on and off at the correct temperature The cabinet sensor is mounted through the wall of the evaporator housing on the return side of the evaporator N W D D DN i Illustration XI 1 The Evaporator Coil Sensor is to be mounted in the evaporator in the center of the coil and fully inserted into the coil until only the wire is visible and then pinch the fins around the cable to hold it in place The part number for the Evaporator Coil Sensor is 337 60406 02 Illustration XI 2 E E Heats drawer opening to prevent condensation from forming Controls voltage to compressor motors The third sensor used is a Liquid Line Sensor This sen sor is to be installed on the liquid line as it comes out of the conde
9. ation V 1 otep 3 Remove the blade from the motor shaft by removing the nut see Illustration V 2 Illustration V 2 NOTE Install the concave side of the fan blade toward the motor If the blade is all that is being replaced stop here and reverse procedure to install otep 4 Remove the mounting bracket from the motor see Illustration V 3 Illustration V 3 Step 5 Disconnect lead wires at the compressor junction box otep 6 Reverse the procedure to install Step 7 Reconnect power to the unit 4 VI CONDENSER COIL VI a REPLACEMENT INSTRUCTIONS Disconnect the electrical power to the machine and follow lockout tag out procedures This procedure requires the use of re frigerants be certain the work area is well ventilat ed Safety goggles and gloves shall be worn since refrigerants may cause burns to the skin Step 1 Remove the louver assembly as outlined in section Ill a Step 2 Recover the refrigerant in the system following the current EPA Guidelines for refrigerant recovery NOTE The use of reclaiming equipment is required Step 3 Disconnect the input and output lines to the condenser coil at the soldered joints closest to the condenser Step 4 Remove the four 4 screws which secure the condenser coil to the mounting brackets see Illustration VI 1 Illustration VI 1 Step 5 Remove the condenser coil Step 6 Reverse the procedure to install the new con denser coil Step 7
10. eaks 9 Disconnect power to the unit and replace any covers removed X f SYSTEM CLEAN UP INTRODUCTION When a compressor burn out or moisture infiltration is encountered the service person must make the de termination as to the degree of system contamination Normally a compressor burn out will fit into one of three categories e CONTAINED compressor oil not acidic no oil dis coloration e CONTAMINATED COMPRESSOR oil acidic discoloration of oil contamination limited to compressor e MASSIVE CONTAMINATION contaminated oil and or refrigerant pumped through system CONTAINED 1 Replacement of liquid line drier 2 Install suction filter drier for clean up and then remove it when service is complete Usually within 48 hours 3 Replacement of compressor 4 Evacuation to 200 microns 5 Charge by weight CONTAMINATED COMPRESSOR The contaminated compressor requires the same pro cedure as the contained burn out Plus the system must be flushed with nitrogen after the compressor and drier has been removed X PROCEDURES amp ADJ cont d Certain procedures in this section re quire electrical test or measurements while power is applied to the machine Excercise extreme caution at all times If test points are not easily accessible disconnect power attach test equipment and reapply power to test X f SYSTEM CLEAN UP INTRODUCTION MASSIVE CONTAMINATION cont d NOTE The replacement compressor
11. information Il d INSTALLATION Generally TU Series Full Size Undercounter refrigerators and freezer units are installed by the dealer or other parties contracted by the dealer or owner Detailed in stallation instructions are included along with each unit when shipped Il e CLEANING Detailed cleaning instructions are included with each unit however special care MUST be given to the condenser coil The condenser coil must be cleaned at a minimum of every six months This can be done with a vacuum cleaner using a brush attachment or a stiff brush or whisk broom For more information on cleaning please refer to the Owner s Manual ll TOOL REQUIREMENTS For most jobs a standard set of hand tools a VOM and AC current tester along with a temperature tester or ther mometer are adequate tools However in some cases the following additional tools may be required as well Il TOOL REQUIREMENTS cont d e Refrigeration Guage Manifold e Refrigeration Reclaiming Equipment e Acetylene Torch e Anti Static Grounding Kit TL 84919 e Nitrogen Bottle With Gauges e Thin 5 16 Open End Wrench e Refrigerant Reclaim Unit ll g REFRIGERATION SYSTEM THEORY OF OPERATION The refrigeration system is the mechanism whereby heat is transferred from the cabinet to the outside air It works under the principle that the heat moves from hot to cold as it tries to establish equilibrium The microprocessor control signals a need fo
12. leads coming into the junc tion box Step 4 Disconnect the discharge and suction lines to the compressor see Illustration VII 1 Illustration VII 1 Step 5 Remove the compressor which is secured by either four 4 nuts or pins Step 6 Install the new compressor and connect the input and output lines Step 7 Connect the lead wires at the junction box Step 8 Install a new drier Step 9 Charge the refrigeration system as outlined under CHARGING SYSTEM in SERVICE PROCE DURES AND ADJUSTMENTS Step 10 Reconnect power to the unit Step 11 Reset the microprocessor control defrost time settings to the correct time of day IX WIRING DIAGRAM NOTE Refer to the wiring diagram below applies to refrigerators and freezers units for any service work performed by a qualified technician X SERVICE PROCEDURES amp ADJUSTMENTS Certain procedures in this section require electrical test or measurements while power is applied to the machine Excercise extreme caution at all times If test points are not easily accessible disconnect power attach test equipment and reapply power to test X a SYSTEM ACCESS All external indicators should be checked as part of system diagnosis before determining the refrigerant pressures Improper access may expose the refrigerant to contaminates and non condensables which will result in system failure X b SWEAT ON PIERCING VALVES NOTE Sweat on piercing valves are
13. lsen 4401 Blue Moud Road Fort Worth TX 76106 Phone 800 825 8220 Fax 817 740 6757 Website www traulsen com Quality Refrigeration 2009 Traulsen All Rights Reserved
14. lsen 4401 Blue Mound Road Fort Worth TX 76106 800 825 8220 NOTE Traulsen reserves the right to change specifications or discontinue models without notice XIV b SPARE PARTS INFORMATION To purchase replacement parts or to speak to service support for Traulsen and most Hobart Refrigeration units please contact our Ft Worth facility by phone at 800 825 8220 or fax to 817 740 6748 parts or 817 740 6757 service To source parts locally follow instructions below for nearest location 1 Log onto www traulsen com 2 Select Service Directory top of screen 3 Select Locate Parts left side of screen 4 Click on State desired To source service support locally follow instructions below for nearest authorized service agent 1 Log onto www traulsen com 2 Select Service Directory top of screen 4 Click on State desired NOTE When calling for spare parts or service support please make sure you have model and serial number of unit avail able XIV c WARRANTY REGISTRATION The warranties for your new Traulsen unit may be registered with us by contacting our Ft Worth facility by phone at 800 825 8220 or you may register on line 1 Log onto www traulsen com 2 Select Service Directory top of screen 3 Select Warranty Registration Form left side of screen 4 Fill out information requested 5 Select Submit to complete unit warranty registration Ae HOURS OF OPERATION Monday thru Friday 7 30 am 4 30 pm CST Trau
15. n Page 2 X SERVICE PROCEDURES amp ADJUSTMENTS e Cleaning Page 2 a System Access Page 8 f Tool Requirements Page 2 b Sweat On Piercing Valves Page 8 g Refrigeration System Theory of Operation Page 2 c Refrigerant Leak Check Page 8 h Air Flow Requirements Page 2 d Evacuating System Page 8 i The Microprocessor Control Page 3 e Charging System Page 9 j Control Location Page 3 f System Clean Up Introduction Page 9 k Operating Data Chart Refrigerator Page 3 g Heater Test Drawer Perimeter Heater Page 10 l Operating Data Chart Freezer Page 3 XI ELECTRICAL OPERATION m Specifications Refrigerator Page 3 a Normal Operation Page 10 n Specifications Freezer Page 3 b Defrost Mode Page 10 Ill SERVICE ACCESS c Component Function Page 10 a System Page 3 d Installation Of The Sensors Page 11 b Evaporator Housing Cover Page 4 XII TROUBLESHOOTING Page 12 c Accessing Start Components Page 4 XIII SERVICE PARTS LIST Page 13 IV RE HINGE DOOR S Page 4 XIV SERVICE ASSISTANCE Page 14 l THE SERIAL TAG Troulsen The serial tag is a permanently affixed label on which is E e recorded vital electrical and refrigeration data about your Traulsen product as well as the model and serial number Vobis This tag is located in the right interior compartment on all standard TU Series Full Size Undercounter models TOTAL CURRENT AMPS See Figure 1 MINIMUM CIRCUIT AMPS MAXIMUM OVERCURRENT PROTECTION READING THE SERIAL TAG LIGHTS WATTS e Serial The permanent ID of your Tra
16. nser coil The part number for this sensor is 337 60407 01 When the condensing temperature reaches 140 F or greater the control will display CLN FIL Should the condensing temperature increase to 160 F the com pressor will automatically shut off When the liquid line temperature drops below 140 F the compressor will restart and when the line temperature drops to 120 F the alarm will reset XII TROUBLESHOOTING Certain procedures in this section require electrical and refrigeration system test or measurements while power is applied to the machine exercise extreme caution at all times If test points are not easily accessible disconnect power attach test equipment and reapply power to test PROBLEM POSSIBLE SOLUTION Compressor will not run compressor has no current draw 1 Main circuit breaker open 2 Compressor overload tripped 3 Cabinet temperature satisfied 4 Wired wrong or faulty connection 5 INTELA TRAUL control malfunction 6 Start component malfunction 7 Compressor motor windings open Compressor will not run current draw and trips overload 1 Low voltage 2 Start component malfunction 3 Compressor windings shorted 4 Locked rotor 5 Excessive discharge pressure Compressor short cycles on overload 1 Low voltage 2 Low refrigerant charge 3 Dirty condenser coil and or filter 4 Wired wrong or faulty connection 5 Condenser fan inoperative 6 Run capacitor malfunction 7 Start compone
17. nt malfunction 8 INTELA TRAUL control malfunction 9 High head pressure Compressor short cycles 1 Improper air flow over evaporator coil 2 Low ambient conditions 3 INTELA TRAUL control malfunction 4 Bad sensors 5 Temp differential set too close Continuous unit operation 1 Loss of refrigerant 2 Excessive drawer openings 3 INTELA TRAUL control malfunction 4 Broken compressor valves 5 Very dirty condenser and or filter 6 Check the DL if higher than 160F Compressor run time lengthy 1 Partial loss of refrigerant 2 High ambient conditions 3 Dirty condenser coil or improper air flow over Condenser coil 1 Excessive product load 2 Excessive drawer openings 3 Drawer gasket requires replacement 4 INTELA TRAUL control malfunction 5 Contaminates in refrigeration system 6 Compressor valve leakage 7 Inadequate defrost cycle Low suction pressure 1 Capillary tube restricted 2 Drier plugged 3 Loss of refrigerant 4 Poor air flow 5 Iced evaporator coil High head pressure 1 Improper air flow across condenser 2 High ambient conditions 3 Overcharge of refrigerant 4 Air in system 5 Dirty condenser coil Will not defrost or inadequate defrost 1 Defrost heater malfunction 2 Wired wrong or faulty connection 3 Cabinet air leak 4 Coil sensor failure 5 INTELA TRAUL control malfunction Coil icing 1 Number of defrost cycles too few 2 Defrost durati
18. om the orange heater wire to neutral XI ELECTRICAL OPERATION XI a NORMAL OPERATION 1 Conditions a Unit connected to correct voltage check using a volt me ter b Microprocessor off cycle defrost settings correct c Condensing unit controlled by the microprocessor control d Cabinet at desired temperature e Door perimeter heaters are powered 100 of the time as pre set by the factory this can be adjusted using the microprocessor control f Evaporator fan powered g Microprocessor control operating correctly 2 Cabinet temperature rises above set temperature a Microprocessor control initiates compressor operation b Evaporator fan should be ON all the time 3 Set temperature is met a Conditions return to those outlined in step 1 Xl b DEFROST MODE 1 Conditions a Unit operating in normal mode 2 Defrost is initiated by the microprocessor control an off cycle defrost should occur every 60 minutes for refrigerators or a hot gas defrost every 4 hours for freezers 3 Defrost terminated by either 1 Evaporator Coil Temperature or 2 Maximum Set Time Interval 4 Cabinet returns to normal operation a Temperature controlled by the microprocessor control b Evaporator fan stays ON evaporator coil will reach desired temperature 10 XI ELECTRICAL OPERATION cont d XI c COMPONENT FUNCTION COMPONENT FUNCTION 1 Compressor Pumps refrigerant thru refrigeration system components
19. on too short 3 Cabinet air leak 4 Drain tube plugged 5 Defrost heater not working 6 Non frozen product put into cabinet 7 Coil sensor failure The cabinet amp coil sensors show high temperature 1 Sensor needs replacing place sensor tip and thermometer in ice water Change sensor ir readings differ or if sensor displays 40 02 266 240 XIII SERVICE PARTS LIST NOTE Part numbers listed are for standard products as currently manufactured For products manufactured as other than standard please contact the factory with model and serial number of unit in question ITEM DESCRIPTION PART NUMBER All Models 6 Adjustable No Lock 6 Adjustable With Lock All Models 6 All Models Door Hinges on the Left Door Hinges on the Right Door Gasket Casters D OPE CD TI ITI a OIO OIO O1 O1 amp C2 Go Ojo O ER 60542 00 Door NO e CD Kn D O Oi rid w n Bio alo I D O C o p O O cO N OIO oO Drawer 2 Drawer 6 Deep Pan refrigerator models only A o o P Drawer Assembly Drawer Face Assembly O1 0 O1 OIl O1 P 21 OIO OI P OIOIO OIOIO Drawer Frame Assembly Drawer Frame Insert Drawer Gasket OIO OJO O1 N O1 G AJA O n O O OJN Drawer Roller Drawer 3 Drawer 4 Deep Pan refrigerator models only I Drawer Assembly O1 COC1 O1 O1 Ojo
20. r heat to be removed from the cabinet The compressor begins by compressing the re frigerant gas as it is discharged The high pressure refrigerant now circulates through the condenser removing heat from the refrigerant and condensing it into a liquid From there the refrig erant flows to the filter drier which removes all traces of moisture and particles from the system After the filter drier the refrigerant passes through a metering device Traulsen uses a thermostatic expansion valve to regulate the flow of refrigerant into the evaporator coils In the evaporator coil heat is transferred from the cabinet to the refrigerant which changed from a cold liquid to a warm low pres sure gas When the desired cabinet air temperature has been reached the microprocessor control shuts off the compressor See figure 2 Evaporator p Capillary Tube Liquid Condenser air from this vaporizes condensate Filter Drier hi Discharge Line Figure 2 Il h AIR FLOW REQUIREMENTS To assure optimum performance the condensing unit of your Traulsen unit MUST have an adequate supply of air for cool ing purposes Therefore the operating location must allow a minimum of 12 clearance in front of the louvers to allow for unrestricted air flow to the condensing unit ll GENERAL INFORMATION cont d Il i THE MICROPROCESSOR CONTROL ll m SPECIFICATIONS REFRIGERATOR For detailed information on replacement
21. s are to be used to dry up a system e Blow down of system with DRY NITROGEN prior to evacuation is acceptable and many times desirable See System Clean Up See page 9 e Evacuate to 200 microns PROCEDURE Disconnect the electrical power to the machine at the main circuit box Place a tag on the circuit box indicat ing the circuit is being serviced This procedure requires the use of refrigerants be certain the work area is well ventilated Safety goggles and gloves shall be worn since refrigerants may cause burns to the skin X SERVICE PROCEDURES amp ADJUSTMENTS cont d Certain procedures in this section require electrical test or measurements while power is applied to the machine Excercise extreme caution at all times If test points are not easily accessible disconnect power attach test equipment and reapply power to test X d EVACUATING SYSTEM cont d 1 Access the refrigeration system as outlined under SYSTEM ACCESS 2 Connect low blue side of gauge manifold to schrader valve on compressor process line and high red side of gauge manifold to schrader valve on filter drier process line 3 Connect center line of gauge manifold to vacuum pump 4 Turn vacuum pump on and open both sides of gauge mani fold 5 Pull a vacuum to 200 microns 6 Break the vacuum with 3 psig of dry nitrogen 7 Repeat steps 5 and 6 8 9 Charge system and check for proper operation Pull vacuum
22. sembly back into posi tion and replace the side panel Secure these in place using the previously removed screws Ill b EVAPORATOR HOUSING COVER If the unit is supplied with a marine work top first remove the work top by removing the mounting screws on the left and right side of the work top Next remove the 3 Phillips head screws from the top of the evaporator and cabinet space cover NOTE The cover is sealed with RTV which may need to be scored before removing the cover llllustration Ill 2 Reverse the procedure when done to reinstall Ill c ACCESSING START COMPONENTS The start components are mounted on the compressor To access the start components first remove the louver assembly and side panel as instructed in section Ill a The start components are mounted on the back side of the compressor IV RE HINGE DOOR S IV a DOOR RE HINGE INSTRUCTIONS Your Traulsen Full Size Undercounter model door s are field re hingeable If re hinging is required please contact our Service Department at 800 825 8220 for re hinge instructions V CONDENSER FAN MOTOR OR BLADE V a REPLACEMENT INSTRUCTIONS Disconnect the electrical power to the machine and follow lockout tag out procedures Step 1 Remove the louver assembly as outlined in section Ill a To gain access through left side otep 2 Remove the screws holding the fan motor bracket to the compressor mounting base see lllustration V 1 Illustr
23. ulsen unit HEATERS AMPS e Model The model of your Traulsen unit REFRIGERANT TYPE n iege DESIGN PRESSURE HIGH e PH Phase REFRIGERANT TYPE e Total Current Maximum amp draw DESIGN PRESSURE HIGH e Minimum Circuit Minimum circuit ampacity e Lights Light wattage e Heaters Heater amperage Hot Food units only e Refrigerant Refrigerant type used e Design Pressure High amp low side operating pressures and refrigerant charge ENERGY STAR e Agency Labels Designates agency listings 370 60294 00 REV A Figure 1 Il GENERAL INFORMATION ll a INTRODUCTION This manual applies to the following models only TU Series Full Size Undercounter Refrigerators TUOAAHT TUO72HT amp TU100HT TU Series Full Size Undercounter Freezers TUO44LT amp TUO72LT Il b C MODEL DESIGNATIONS TU 044 HT Positions 12 3 Position 1 TU z Traulsen Undercounter Position 2 044 2 44 Length Model 072 2 72 Length Model 100 2100 Length Model Position 3 HT Refrigerator LT Freezer Il c WIRING DIAGRAM Refer to the wiring diagram for any service work per formed on this unit A copy is placed on the unit when shipped Also a copy of the wiring diagram is located on page 7 of this manual Should you require another copy or a wiring diagram for an older production unit please contact Traulsen Service at 800 825 8220 You should have model and serial number of unit prior to calling See page 1 for serial tag location and
24. used for system diagnostics but may be left on after service is com plete They may be installed while the system is fully charged 1 Place one piercing valve on the compressor process tube and one on the liquid line process tube Follow the installation instructions provided by the manufacturer of the piercing valve 2 When complete follow the guidelines as outlined under REFRIGERATION LEAK CHECK and EVACUATING SYSTEM X c REFRIGERANT LEAK CHECK Disconnect the electrical power to the machine at the main circuit box Place a tag on the circuit box indicating the circuit is being serviced This procedure requires the use of re frigerants be certain the work area is well ven tilated Safety goggles and gloves shall be worn since refrigerants may cause burns to the skin NOTE The use of R 22 in small quantities is Recom mended as a trace gas for leak detection NOTE This leak check procedure is to be used only after the refrigerant has been properly reclaimed 1 Access the refrigeration system note see section Il a 2 Attach gauge manifold set to the system low side to process tube on the compressor and the high side to the process tube 3 Connect refrigerant bottle to the center of gauge manifold and open the valve on the bottle Bleed charg ing hose at the manifold gauge to remove air from the system 4 Open valve on low side of gauge manifold and charge system with one ounce of R 22 5
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