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ThermoForma 3771 Operating And Maintenance Manual

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ThermoForma
Millcreek Road, P.O. Box 649
Marietta, Ohio 45750
U.S.A.
Telephone: (740) 373-4763
Telefax: (740) 373-4189
3771 / 3772
3775 / 3776
3779 / 3780
3787 / 3788
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.
Caution: Any internal adjustments and maintenance must be performed
Models:
Laboratory and Chromatography
Refrigerators
Operating and Maintenance Manual
Manual No. 7003771 Rev. 3
Read this Instruction Manual
by qualified service personnel.
3773 / 3774
3777 / 3778
3785 / 3786
51-1483-05 Rev. A

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  • Page 1 ThermoForma Millcreek Road, P.O. Box 649 Marietta, Ohio 45750 U.S.A. Telephone: (740) 373-4763 Telefax: (740) 373-4189 Models: 3771 / 3772 3773 / 3774 3775 / 3776 3777 / 3778 3779 / 3780 3785 / 3786 3787 / 3788 Laboratory and Chromatography...
  • Page 2 Do You Need Information or Assistance on Thermo Forma Products? If you do, please contact us 8:00 A.M. to 7:00 P.M. (Eastern Standard Time) at: 1-740-373-4763 Direct 1-888-213-1790 Toll Free, U.S. and Canada 1-740-373-4189 http://www.forma.com Internet Worldwide Web Home Page fservice@forma.com Service E-Mail Address Our Sales Support staff can provide information on pricing and give you quotations.
  • Page 3 SECTION I General Information...
  • Page 4 THEMO FORMA MODELS PART # MODEL # MODEL TYPE CUBIC FEET DOOR TYPE VOLTAGE 52-1996-33 3771 Refrigerator 27.3 1 Glass Hinged 52-1996-34 3772 Refrigerator 27.3 1 Glass Hinged 52-1996-35 3773 Refrigerator 27.3 1 Solid Hinged 52-1996-36 3774 Refrigerator 27.3 1 Solid Hinged...

  • Page 5: Table Of Contents

    Cobex Model #C-921 ..........30 Evaporator Coil Assembly Component Ident..14 Models: 3771 / 3773 / 3775 / 3777 / 3779 / 3785 / 3787 WIRING DIAGRAMS page ........31 Export Models: 3772 / 3774 / 3776 / 3778 / 3780 / 3786 / 3788 Control Panel page ........
  • Page 6 TABLE OF CONTENTS - continued SECTION III - MAINTENANCE & REPAIR SECTION IV - PARTS LISTS General Maintenance & Repair ........37 Replacement Parts List..........67 Service Information ............37 Accessories ............69 Compressor Installation ..........39 COMPONENT REPLACEMENT Lab & Pharmacy Refrigerators/Freezers & Chromatography Refrigerators Warranty ....

  • Page 7: Handling & Installation

    HANDLING & INSTALLATION FREIGHT DAMAGES & SHORTAGES volt, 60 hz. The electrical outlet should not be controlled by a wall switch which might be turned off accidentally. IMPORTANT UNCRATING THE CABINET The cabinet was inspected and packaged at the factory, and should arrive in excellent condition. The cabinet should be moved as close as possible to the The transportation company or other parties operating location before removing crate base.

  • Page 8: Condensate Pan Installation

    CONDENSATE PAN 5. Check fan blade(s) for “free” operation. INSTALLATION INSTRUCTIONS 6. Turn on the main power switch. Once the compressor starts, the voltage should be checked at the compres- sor terminals to determine if there is proper voltage to MAKE SURE THE CABINET IS DISCONNECTED the compressor.

  • Page 9: Dimensional Drawings

    DIMENSIONAL DRAWINGS Medium Temp., Top Mount, Glass Pull Door Refrigerators 31" 52" 26 1/4" 47 1/4" Interior Interior 83 3/4" 83 3/4" 6" 6" SIDE VIEW 78" 36 1/4" 73 1/4" 33" Interior 29 5/8" 83 3/4" 6" GENERAL INFORMATION...

  • Page 10: Specifications

    Refrigerant Control Expansion Valve Expansion Valve Expansion Valve Amp Rating - Data Plate 3771: 11.2; 3772: 6.3 3775: 13.8; 3776: 6.1 3779: 16.0; 3780: 8.2 3785: 13.2; 3786: 7.5 3787: 15.8; 3788: 8.8 Electrical Specs. (V / HZ / PH) 115 / 60 / 1 (Export: 220V/50 Hz) 115 / 60 / 1 (Export: 220V/50 Hz) 115 / 60 / 1 (Export: 220V/50 Hz) UL &...
  • Page 11 SPECIFICATIONS Medium Temp., Top Mount, Solid Pull Door Refrigerators MODEL SPECIFICATION 1-DOOR 2-DOOR DESIGNATION INFORMATION Compressor Mount Temperature Range 37° to 55° (3° to 13°C) 37° to 55° (3° to 13°C)) NOTE: Export Models use a Number of Doors transformer. See page 41 for Door Construction Foam-in-Place Foam-in-Place...

  • Page 12: Grounding Instructions

    GROUNDING INSTRUCTIONS RATING: 115V, AC 15 Amp This appliance is equipped with a three-prong (grounding) plug for your protection against shock Plug Receptacle hazards. The appliance should be plugged directly into 5-15 5-15R a properly grounded three-prong receptacle. Where a two-prong wall receptacle is encountered, it must be replaced with a properly grounded three prong receptacle in accordance with the National Electrical Code and local codes and ordinances.

  • Page 13: Condensing Unit Assembly Component Ident

    CONDENSING UNIT ASSEMBLY Component Identification Models: 3771 / 3772 / 3785 / 3786 50-0142-* Models: 3773 / 3774 / 3777 / 3778 50-0141-* GENERAL INFORMATION...

  • Page 14: Models: 3775 / 3787

    CONDENSING UNIT ASSEMBLY Component Identification Models: 3775 / 3787 Export Models: 3776 / 3788 NOTE: See Parts Section IV. GENERAL INFORMATION...

  • Page 15: Models: 3779 Export Models: 3780

    CONDENSING UNIT ASSEMBLY Component Identification Models: 3779 Export Models: 3780 GENERAL INFORMATION...

  • Page 16: Evaporator Coil Assembly Component Ident

    EVAPORATOR COIL ASSEMBLY Component Identification Models: 3771 / 3773 / 3775 / 3777 / 3779 / 3785 / 3787 Export Models: 3772 / 3774 / 3776 / 3778 / 3780 / 3786 / 3788 GENERAL INFORMATION...
  • Page 17 EVAPORATOR FAN SHROUD ASSEMBLY Component Identification Models: 3771 / 3773 / 3775 / 3777 / 3779 / 3785 / 3787 Export Models: 3772 / 3774 / 3776 / 3778 / 3780 / 3786 / 3788 GENERAL INFORMATION...

  • Page 18: Electrical Box Assembly Component Ident

    ELECTRICAL BOX ASSEMBLY Component Identification Models: 3771 / 3773 / 3775 / 3777 / 3779 / 3785 / 3787 Export Models: 3772 / 3774 / 3776 / 3778 / 3780 / 3786 / 3788 GENERAL INFORMATION...

  • Page 19: Start Kit Component Ident

    START KIT Component Identification If applicable GENERAL INFORMATION...

  • Page 20: Models: 3771 / 3785

    SIDE LIGHT ASSEMBLY Models: 3771 / 3785 Export Models: 3772 / 3786 ITEM DESCRIPTION Lamp Bracket LH Lampgolder - Top Lampholder - Bottom GENERAL INFORMATION...
  • Page 21 MULLION LIGHT FIXTURE ASSEMBLY Models: 3775 / 3779 / 3785 / 3787 Export Models: 3776 / 3780 / 3786 / 3788 ITEM DESCRIPTION Plate - Light Lampholder - Top Lampholder - Bottom Wire Lead Wire Lead Connector - Splice Cap Tape - Grey Duct Switch - Toggle Wire Lead...

  • Page 22: Section Ii - Electrical & Refrigeration Information

    SECTION II Electrical & Refrigeration Information...

  • Page 23: Refrigeration Specifications

    REFRIGERATION SPECIFICATIONS Medium Temp., Glass, 1-Door Refrigerator Models: 3771 / 3785 & Export Models: 3772 / 3786 SYSTEM COMPONENTS - R404A Compressor Model Number Copeland ASE24C3E-IAA Compressor Horsepower Recommended Operating Temp. Range 37°F to 55°F (3°C to 13°C) Cabinet Volts...
  • Page 24 REFRIGERATION SPECIFICATIONS Medium Temp., Glass, 2-Door Refrigerators Models: 3775 / 3787 & Export Models: 3776 / 3788 SYSTEM COMPONENTS - R404A Compressor Model Number Copeland AST54CIE-IAA Compressor Horsepower Recommended Operating Temp. Range 37°F to 55°F (3°C to 13°C) Cabinet Volts Expansion Device Sporlan FBS- ⁄...

  • Page 25: Model: 3779 & Export Model: 3780

    REFRIGERATION SPECIFICATIONS Medium Temp., Glass, 3-Door Refrigerators Model: 3779 & Export Model: 3780 SYSTEM COMPONENTS - R404A Compressor Model Number Copeland AST54CIE-CAA Compressor Horsepower Recommended Operating Temp. Range 37°F to 55°F (3°C to 13°C) Cabinet Volts Expansion Device Sporlan FBS- ⁄...

  • Page 26: Control Panel Layout

    CONTROL PANEL LAYOUT Medium Temperature Models ELECTRICAL & REFRIGERATION INFORMATION...
  • Page 27 CONTROL ANNUNCIATOR PANEL GENERAL The control annunciator panel is designed to provide 3. The digital process meter monitors cavity tempera- the user with a convenient way of monitoring cavity ture and displays the measurement on a LCD conditions, turning the interior light on and off and screen in degrees centigrade (°C).

  • Page 28: Chart Paper Change / Pen Replacement

    5. Contacts are provided on the reverse side of the MARKING SYSTEMS: control annunciator panel to power a remote alarm MARK-A-MATIC II INKING SYSTEM from the cabinet battery supply. The remote alarm The pen consists of a self-contained ink reservoir with should be a low ampere 6 V DC device such as an a porous plastic stylus which is snapped around the audio alarm or small signal light to avoid running...

  • Page 29: Battery Backup

    TEMPERATURE RECORDER - SETTING THE ALARM SET POINT CALIBRATION CHECK Press the “change chart” button (#3) to bring the pen This recorder has been accurately calibrated at the arm off the chart. When the button is pressed again, factory. Before making any adjustments, this instru- the pen comes onto the chart.

  • Page 30: Cobex Model #C-921

    COBEX Model #C-921 Description: 6" Skeleton in Electronic Recorder One Relay Output Dual Voltage 110/220V - 50/60 Hz. 9-volt Battery Back-up Chart Paper - Ink Chart Refer to Cabinet Wiring Diagram (Control Panel section for proper connection information). CHART RECORDER Type of Temperature Box of Charts...
  • Page 31 LADDER WIRING DIAGRAM Models: 3771 / 3773 / 3775 / 3777 / 3779 / 3785 / 3787 Export Models: 3772 / 3774 / 3776 / 3778 / 3780 / 3786 / 3788 *See page 33 for information on transformer. ELECTRICAL & REFRIGERATION INFORMATION...
  • Page 32 CONTROL PANEL WIRING DIAGRAM Standard / Options ELECTRICAL & REFRIGERATION INFORMATION...

  • Page 33: Transformer Layout - Export

    TRANSFORMER LAYOUT AUTO-TRANSFORMER INPUT VOLTAGE TAPS 50 HZ 60 HZ 105V OUTPUT 115V SWITCH, INPUT SETTING RECEPTACLE FOR CABINET POWER CORD TRANSFORMER POWER CORD; PLUG INTO WALL OUTLET NOTE: Appropriate plug to be determined upon installation by a licensed electrician in accordance with national electrical code, local codes and ordinances.

  • Page 34: Temperature Probe Bottle Instructions

    TEMPERATURE PROBE BOTTLE INSTRUCTIONS Some applications call for the thermal bulb from the alarm chart recorder (and solar digital thermometer) to be immersed in a bottle of solution (two parts glycerin, one part water). This will reduce the air temperature swing as indicated. ELECTRICAL &...

  • Page 35: Section Iii - Maintenance & Repair

    SECTION III Maintenance & Repair Thermo Forma requires compliance to all Federal and Local CFC reclamation laws by service companies engaging in sys- tem processing.
  • Page 36 WARNING To avoid the possibility of an electrical shock, turn OFF the thermostat and unplug the power cord of the cabinet before cleaning or touching electrical connections or parts.
  • Page 37 MAINTENANCE & REPAIR PRE-SERVICE CHECK LIST 3. Sometimes the ingredients used in some products or containers will contaminate other products. You may avoid the cost and inconvenience of an unnec- 4. Be sure to follow a weekly schedule for cleaning cab- essary product call by first reviewing this check list of the inet interior.
  • Page 38 PRODUCT HISTORY If the compressor takes longer than 40 seconds to pull to its ultimate low vacuum, one or both cylinders are not The first rule in servicing a refrigeration system is to functioning as they should. Any reading less than these determine if the problem is an electrical or mechanical will require replacement of the compressor.

  • Page 39: Compressor Installation

    Also check that the door seals properly. An air leak will requires a gauge or charging line with a depressing affect proper operation, and the cabinet’s ability to pin to open valve when the connection is made. reach its coldest temperature. CAUTION Run the cabinet at both 100% run, and a cycling tem- perature for at least 24 hours.
  • Page 40 TO CHECK CAPACITORS To slope shelves, insert the cantilever plate tabs into the rectangular holes in the desired position on the 1. Disconnect the cabinet from the power supply. shelf standard. Lift up on the rear of the shelf so that the top tab is locked behind the top of the rectangular 2.

  • Page 41: Evaporator Drain Pan

    EVAPORATOR DRAIN PAN REPLACEMENT The evaporator drain pan is located in the upper interior of the cabinet. It pivots down for ease of accessibility. 1. Disconnect the power to the cabinet 1. Release R.H. and L.H. Lock screws. 2. Drop the front of the pan and swing it back. 3.

  • Page 42: Thermostat

    THERMOSTAT REPLACEMENT Models: 3771 / 3773 / 3775 / 3777 / 3779 / 3785 / 3787 Export Models: 3772 / 3774 / 3776 / 3778 / 3780 / 3786 / 3788 The thermostat is located in the upper left hand corner of the drain pan area.

  • Page 43: Evaporator Fan Motor

    EVAPORATOR FAN MOTOR REPLACEMENT The evaporator fan motor is located in the cabinet interi- or behind the evaporator coil. 1. Disconnect the power to the cabinet 2. Remove the screws from the fan guard housing. 3. Drop the motor down out of the drain pan. 4.
  • Page 44 INSTRUCTIONS-SOLID DOOR REMOVAL Installation & Adjustment MAINTENANCE & REPAIR...

  • Page 45: Cabinet Center Mullion Heated

    CABINET CENTER MULLION Heated Component Identification Models: 3771 / 3773 / 3775 / 3777 / 3779 / 3787 Export Models: 3772 / 3774 / 3776 / 3778 / 3780 / 3788 MAINTENANCE & REPAIR...

  • Page 46: Torsion Rod Hinged Doors (Glass Doors Only)

    TORSION ROD HINGED DOORS - Maintenance & Removal GLASS DOOR CABINETS ONLY MAINTENANCE - ALIGNING DOORS Proper alignment of the cabinet doors will eliminate hinge binding and provide correct gasket seal. 1. Check the cabinet level and door alignment by firmly closing each door.

  • Page 47: Door Gasket

    DOOR GASKET REPLACEMENT Thermo Forma gasketing is replaceable on glass or 7. Using a rubber mallet, tap the gasket into the solid door models. A retainer is molded into the door retainer. (NOTE: Gasket can be soaked in warm frame. The door gasket is then tapped into the retain- water to make pliable.) er and secured for airtight door seal.

  • Page 48: Metering Device

    METERING DEVICE REPLACEMENT The refrigerant metering device in this cabinet is expan- sion valve. It is a Sporlan BIF 1/4-C. It is located on the face of the evaporator coil behind the drain pan. 1. Disconnect power to the cabinet. 2.

  • Page 49: Condenser Fan Motor

    CONDENSER FAN MOTOR REPLACEMENT The condenser fan motor is located directly behind the condenser coil in the machinery compartment. 1. Disconnect the power to the cabinet. 2. Remove the front top panel. 3. Remove the metal screen fan guard. 4. Disconnect the wire at the junction box. 5.

  • Page 50: Master Power Supply Switch

    MASTER POWER SUPPLY SWITCH REPLACEMENT The master power supply switch on the top mount cabinets is located on the top front panel. 1. Disconnect the power to the cabinet. 2. Remove the front panel by removing 2 retainer screws located on the top of the cabinet and then lifting to disengage.

  • Page 51: Light Switch

    LIGHT SWITCH REPLACEMENT On glass door models, the light switch is located on the front control panel. 1. Disconnect the power to the cabinet. 2. Remove the front panel by removing 2 retainer screws located on the top of the cabinet and lifting to disengage.

  • Page 52: Ballast

    BALLAST REPLACEMENT The ballast is located in the machinery compartment (A), attached to the back of the electrical control box (B). 1. Disconnect the power to the cabinet. 2. Remove the front panel. 3. Remove the cover panel on the electrical wiring box.

  • Page 53: Fluorescent Bulb

    FLUORESCENT BULB REPLACEMENT 1. Remove the plastic outer lamp shield. 2. Grasp the bulb. 3. Raise the bulb up. Pull out of the socket. 4. Remove the lamp shields and the end caps. 5. Place a new bulb in the shield. Attach the end caps. 6.

  • Page 54: Touch-Up Paint

    TOUCH-UP PAINTING INSTRUCTIONS - Spray Paint 1. Sand to bare metal on affected area and its edges until the edges are smooth or feathered. This insures that you are spraying on to a clean area that has adhesion. 2. Use an automotive primer (lacquer) over the bare metal.

  • Page 55: Cleaning

    CLEANING CAUTION: Make sure cabinet is disconnected from its power source prior to any cleaning or maintenance. CLEANING THE CABINET EXTERIOR CLEANING THE STORAGE COMPARTMENT Wipe the exterior occasionally with a cloth dampened in mild detergent water; rinse, and wipe dry with a soft, IMPORTANT: Do not use any objects or cleaners which may dry cloth.

  • Page 56: Machinery

    MACHINERY TROUBLESHOOTING GUIDES UNIT WILL NOT RUN. Blown fuse. Check power for “live” circuit. If outlet is “dead” but building has power, replace the fuse. Try to determine the cause of the over- load or short circuit Low Voltage. Check outlet with voltmeter. Should check 115V plus or minus 10%.

  • Page 57: Compressor

    MACHINERY TROUBLESHOOTING GUIDES CABINET RUNS Not enough air circulation around Relocate cabinet or provide proper CONTINUOUSLY. cabinet or circulation is restricted. clearances around cabinet. Remove restriction. Cooling large quantities of product or Explain to customer that heavy loading heavy loading. causes long running time.
  • Page 58 MACHINERY TROUBLESHOOTING GUIDES UNIT RUNS Abnormally high, heavy use of cabinet. Heavy usage requires more operation TOO MUCH. Check usage and correct or explain. Shortage of refrigerant. Unit must run Put in the normal charge and check for longer and will operate at a lower leaks.
  • Page 59 COMPRESSOR TROUBLESHOOTING GUIDES WON’T START. Open line circuit. Check wiring, fuses, receptacle. NO HUM. Protector open. Wait for reset—check current. Control contacts open. Check control, check pressures. Open circuit in stator. Replace stator or compressor. WON’T START. HUMS Improperly wired. Check wiring against diagram.
  • Page 60 COMPRESSOR TROUBLESHOOTING GUIDES COMPRESSOR STARTS Low line voltage. Bring up voltage. & RUNS BUT CYCLES ON PROTECTOR. Additional current passing through Check for added fan motors and pumps protector. connected to wrong side of protector. Suction pressure too high. Check compressor for proper application. Discharge pressure too high.

  • Page 61: Fluorescent Lamp

    FLUORESCENT LAMP TROUBLESHOOTING GUIDES Thermo Forma uses standard fluorescent lamps in all of its applications. Standard one- and two-lamp ballast circuits are used. Replacement lamps should be purchased over the counter from a local electrical wholesaler. The table below indicates general problems that may be encountered with fluorescent lighting applications, possi- ble causes, and corrective maintenance suggestions.
  • Page 62 FLUORESCENT LAMP TROUBLESHOOTING GUIDES NORMAL END OF LIFE. Normal failure. Active material on Replace lamp promptly. NO STARTING EFFORT Open lamp cathode circuit due to If open, circuit is shown by continuity test or OR SLOW STARTING. broken cathode, air leak, or by viewing end of bulb against a pinhole open weld.
  • Page 63 MEASUREMENTS - STARTING LAMP VOLTAGE Typical Two-Lamp RS Ballast Starting Voltage The largest percentage of light ballasts used today are of the two-lamp Rapid Start type. In order to read starting or open circuit voltage, as it often called, remove both lamps from their sockets. The high volt- age (OVC) which starts and operates the lamp is always between the “R”...

  • Page 64: Section Iv - Parts Lists

    SECTION IV Parts Lists...
  • Page 65 page 66 - BLANK...
  • Page 67 PARTS LISTS...

  • Page 68: Accessories

    ACCESSORIES PARTS LIST PART # DESCRIPTION ELECTRONIC TEMPERATURE CHART RECORDER 201128 6", 7-Day, Single Pen, Range of -5°C to 25°C when installed on refrigerators and chromatography refrigerators; -45°C to 0°C when installed on freezers. Includes battery back-up. Factory installed. AUDIBLE/VISUAL ALARM SYSTEM 400129 Alerts user to temperature deviations above setpoint.
  • Page 69 ACCESSORIES PARTS LIST PART # DESCRIPTION PULLOUT DRAWER: 224268 Constructed of solid stainless steel with ball bearing rollers. Fits hinged double and triple door refrigerators, chromatography refrigerators and freezers Dimensions: 18.2"W x 3.4"H x 23.5"F-B (46.2 cm x 8.6 cm x 59.7 cm) Maximum Capacity: 6 per door.

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