Traulsen Page 10
Workshop Manuals
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X. SERVICE PROCEDURES & ADJUSTMENTS (cont’d)
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 lter/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) Pull vacuum to 200 microns.
9) Charge system and check for proper operation.
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 ow
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 leaks.
9) Disconnect power to the unit and replace any covers
removed.
X. f-SYSTEM CLEAN UP/INTRODUCTION:
When a compressor burn-out or moisture inltration
is encountered, the service person must make the de-
termination as to the degree of system contamination.
Normally a compressor burn-out will t into one of three
categories:
• CONTAINED - compressor oil not acidic, no oil dis
coloration.
• CONTAMINATED COMPRESSOR - oil acidic,
discoloration of oil, contamination limited to
compressor.
• MASSIVE CONTAMINATION - contaminated oil
and/or refrigerant pumped through system.
CONTAINED
1) Replacement of liquid line drier.
2) Install suction lter 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 ushed with nitrogen after the compressor and
drier has been removed.
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.
Contents Summary of Traulsen
- Page 1Traulsen Refrigeration SERVICE MANUAL Instructions For The Troubleshooting And Repair Of Traulsen Full-Size Undercounter Refrigerators and Freezers TU044HT, TU072HT & TU100HT Refrigerator Models TU044LT & TU072LT Freezer Models This manual is prepared for the use of trained Authorized Traulsen Servi
- Page 2TABLE OF CONTENTS I. THE SERIAL TAG Page 1 V. CONDENSER FAN MOTOR OR BLADE Page 4 II. GENERAL INFORMATION Page 2 VI. CONDENSER COIL Page 5 a-Introduction Page 2 VII. EVAPORATOR FAN Page 5 b-Model Designations Page 2 VIII. COMPRESSOR Page 6 c-Wiring Diagram Page 2 IX. WIRING DIAGRAM Page 7 d-Installa
- Page 3II. GENERAL INFORMATION II. a-INTRODUCTION: II. f-TOOL REQUIREMENTS (cont’d): This manual applies to the following models only: ● Refrigeration Guage Manifold ● Refrigeration Reclaiming Equipment TU Series Full-Size Undercounter Refrigerators ● Acetylene Torch TU044HT, TU072HT & TU100HT ● Anti-Stati
- Page 4II. GENERAL INFORMATION (cont’d) II. i-THE MICROPROCESSOR CONTROL: II. m-SPECIFICATIONS-REFRIGERATOR: For detailed information on replacement, repair or adjustment of the INTELA-TRAUL® microprocessor control please refer to it’s TU044HT TU072HT TU100HT manual, form number TR35705 or contact our Serv
- Page 5III. SERVICE ACCESS (cont’d) V. CONDENSER FAN MOTOR OR BLADE III. a-SYSTEM(cont’d): V. a-REPLACEMENT INSTRUCTIONS: To gain full access to the refrigeration system from the Disconnect the electrical power to the machine side, remove the side cover by removing the screws. and follow lockout/tag out pr
- Page 6VI. CONDENSER COIL VII. EVAPORATOR FAN VI. a-REPLACEMENT INSTRUCTIONS: VII. a-REPLACEMENT INSTRUCTIONS: Disconnect the electrical power to the Disconnect the electrical power to the machine and follow lockout/tag out procedures. machine and follow lockout/tag out procedures. This procedure requires
- Page 7VIII. 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 t
- Page 8IX. WIRING DIAGRAM NOTE: Refer to the wiring diagram below (applies to refrigerators and freezers units) for any service work performed by a qualified technician. -7-
- Page 9X. SERVICE PROCEDURES & 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
- Page 10X. SERVICE PROCEDURES & 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 t
- Page 11X. PROCEDURES & ADJ. (cont’d) XI. ELECTRICAL OPERATION Certain procedures in this section re- XI. a-NORMAL OPERATION: quire electrical test or measurements while power is 1. Conditions applied to the machine. Excercise extreme caution a) Unit connected to correct voltage (check using a volt me- at a
- Page 12XI. ELECTRICAL OPERATION (cont’d) XI. c-COMPONENT FUNCTION: COMPONENT FUNCTION 1. Compressor Pumps refrigerant thru refrigeration system components 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 refri
- Page 13XII. 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 t
- Page 14XIII. 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 Casters All Models 6” Adjustable - No Lo
- Page 15XIV. 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 ch
- Page 16HOURS OF OPERATION: Monday thru Friday 7:30 am - 4:30 pm CST Traulsen 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