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ThermoForma 923 Operating And Maintenance Manual

Ultra low temperature upright freezer 23 cu. ft. capacity
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Model:
923/983
Ultra Low Temperature
Upright Freezer
23 cu. ft. capacity
Operating and Maintenance Manual
Manual No: 7020923 Rev. 7

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Summary of Contents for ThermoForma 923

  • Page 1 Model: 923/983 Ultra Low Temperature Upright Freezer 23 cu. ft. capacity Operating and Maintenance Manual Manual No: 7020923 Rev. 7...
  • Page 2 Model 923/983_______________________________________________________________________________________ CAUTION! All internal adjustments and maintenance must be performed by qualified service personnel. IMPORTANT! Read This Instruction Manual Failure to read, understand and follow the instructions in this manual may result in damage to the unit, injury to operating personnel and poor equipment performance.
  • Page 3 Model 923/983_________________________________________________________________________________Service...
  • Page 4 Model 923/983__________________________________________________________________________________Safety General Safety Notes used in this Manual Important operating and/or maintenance instructions. Read the accompanying text carefully. Ce symbole attire l'attention de l'utilisateur sur des instructions importantes de fonctionnement et/ou d'entretien. Il peut être utilisé seul ou avec d'autres symboles de sécurité. Lire attentivement le texte d'accompagnement.

  • Page 5: Table Of Contents

    Model 923/983_________________________________________________________________________Table of Contents Table of Contents Section 1 - Installation and Start-Up 1.1 Unloading and Moving the Freezer ....1-1 1.2 Getting to Know Your Freezer .....1-1 1.3 Environmental Conditions .

  • Page 6: Section 1 - Installation And Start-Up

    Model 923/983______________________________________________________________________________Installation Section 1 - Installation and Start-Up The freezer can be easily pushed to the desired approved location, described in Section 1.6. If necessary, the 1.1 Unloading and Moving the Freezer doorstop may be removed to allow the door to swing fully open to move the unit through tight openings.
  • Page 7 Model 923/983_____________________________________________________________________________Installation Figure 1-4, Vacuum Relief Port Figure 1-2 and Chamber Probe Freezer Exterior, front view Figure 1-3 Figure 1-5, Vacuum Relief Port and Chamber Probe Assembly (without cover) Freezer Base, rear view...

  • Page 8: Environmental Conditions

    Model 923/983______________________________________________________________________________Installation 1.3 Environmental Conditions 1.6 Location The ULT Freezers are designed to be electrically safe in the fol- lowing environmental conditions: Locate the freezer on a firm, level surface in an area with an ambient temperature between 18°C and 32°C. Provide •...

  • Page 9: Optional Temperature Recorder

    Model 923/983_____________________________________________________________________________Installation 9-volt battery Program selection and calibration buttons Green LED Figure 1-8 Chart Recorder, detail view 1.12 Water-cooled Condenser 1.9 Optional Temperature Recorder An accessory available for your freezer is the water- a. Connecting recorder battery cooled condenser. Details for the use of this condenser follow:...

  • Page 10: Section 2 - Operation

    Model 923/983___________________________________________________________________________Operation Section 2 - Operation 2.2 Changing the Over Temperature Alarm Set Point 2.1 Changing the Control Temperature Set Point The following procedure sets the alarm for a precise 1. Remove the screwdriver on the front left corner of the control temperature during initial set up.

  • Page 11: Alarms

    Model 923/983_______________________________________________________________________________Operation 2.3 Alarms Alarm Description Visual Audible Cause Action Required Over Temperature Flashing (red) · Unit is above alarm setpoint · Check freezer operation. · Addition of excessive product load Condenser Hot On (red)* · Filter and/or condenser dirty.

  • Page 12: Section 3 - Calibration

    Model 923/983______________________________________________________________________________Calibration a. Changing the recorder range: Section 3 - Calibration The chart recorder contains eight temperature ranges and is factory-programmed for the freezer. 1. Press and hold button #3 for one second, then let the pen move off the chart paper.
  • Page 13 • Fill a chest by starting at the left side near the probe. Filling with room temperature racks will result in a long pull-down time. • Fill unit with frozen product to help overall performance; frozen water jugs, for example. •Millcreek Road, Box 649 •Marietta, Ohio 45750 USA •740-373-4763 •USA and Canada 888-213-1790 •Telefax: 740-373-4189 •email: service@thermoforma.com...
  • Page 14 Preventive Maintenance for 900 Series Freezers Refer to Manual Section Action Monthly Yearly Every 2 Years Verify ambient temperature, <90°F * Adjust door handle for firm latching, as needed Figure 1-4 probe location 4.5 Check and clean probe and cover, gaskets, hinges and doors of ice and snow. More frequent cleaning may be required, depending on use and environmental conditions.

  • Page 15: Section 4 - Routine Maintenance

    Model 923/983______________________________________________________________________Routine Maintenance CIP (Clean-In-Place) Procedure Section 4 - Routine Maintenance 1. Disconnect the unit from the water supply. 2. Drain the unit. 4.1 Cleaning the Cabinet Exterior 3 . Rinse with fresh water and drain the unit again. 4. Fill with fresh water.

  • Page 16: Replacing The Battery

    Model 923/983_________________________________________________________________________________Service 4.7 Replacing the Battery Section 5 - Service Servicing must only be performed For a consistent and dependable charge, replace by service personnel who are the battery every 2 years. Replacement batteries qualified to repair cascade refrig- must be rechargeable and are available from eration systems.

  • Page 17: Troubleshooting Chart

    Model 923/983________________________________________________________________________________Service 5.2 Troubleshooting Chart Symptom Possible Cause No Temperature Display • Power line cord disconnected or not properly installed • External power circuit breaker tripped/open • Main power switch OFF • 24 volt transformer fuses open. • Too much warm product added Chamber Temperature Deviates from Set Point •...

  • Page 18: Section 6 - Specifications

    5.0" (12.7cm) sides; 4.5" (11.4cm) door Electrical 923, 983 230VAC, 1 PH, 50/60 Hz, 12.0 FLA Operating Range: 208VAC - 240VAC Breaker 923, 983: 15 Amp, 230V Requirements Automatic Voltage Low: Cut In: 210V Cut Out: 220V Volts Boost: 18...
  • Page 19 Thermo Forma - Representative Pulldown and Cycling Curve for 23 Ft. -86°C Freezers Sample Chart Time (5 minute intervals) 23ft3-86.xls 2/02...
  • Page 20 Model 923/983______________________________________________________________________________Parts List...
  • Page 21 Model 923/983______________________________________________________________________________Parts List...
  • Page 22 Model 923/983______________________________________________________________________________Parts List...
  • Page 23 Model 923/983______________________________________________________________________________Parts List...
  • Page 24 Model 923/983______________________________________________________________________________Parts List...
  • Page 27 Model 923/983______________________________________________________________________________Parts List...
  • Page 28 Model 923/983______________________________________________________________________________Parts List...
  • Page 31 Model 923/983_________________________________________________________________Electrical Schematics 9 - 1...
  • Page 32 Model 923/983_________________________________________________________________Electrical Schematics 9 - 2...
  • Page 33 Model 923/983_________________________________________________________________Electrical Schematics 9 - 3...
  • Page 34 Model 923/983_________________________________________________________________Electrical Schematics 9 - 4...
  • Page 35 Model 923/983_________________________________________________________________Electrical Schematics 9 - 5...
  • Page 36 Model 923/983_________________________________________________________________Electrical Schematics 9 - 6...

  • Page 37: Section 10 - Warranty

    THERMO FORMA 900 & 8500 SERIES ULT FREEZER WARRANTY The Warranty Period starts two weeks from the date your equipment is shipped from our facility. This allows for shipping time so the warranty will go into effect at approximately the same time your equipment is delivered. The warranty protec- tion extends to any subsequent owner during the warranty period.
  • Page 38 THERMO FORMA 900 & 8500 SERIES ULT FREEZER INTERNATIONAL DEALER WARRANTY The Warranty Period starts two months from the date your equipment is shipped from our facility. This allows for shipping time so the warranty will go into effect at approximately the same time your equipment is delivered. The warranty protection extends to any subsequent owner during the warranty period.
  • Page 39 Model 923/983_________________________________________________________________________Declaration of Conformity 10-3...
  • Page 40 Model 923/983_________________________________________________________________________Declaration of Conformity 10-4...
  • Page 41 Millcreek Road, P.O. Box 649 Marietta, Ohio 45750 U.S.A. Telephone: (740) 373-4763 Telefax: (740) 373-4189...

This manual is also suitable for:

983

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