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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
3795 / 3796
3799 / 3800
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 Freezers
Operating and Maintenance Manual
Manual No. 7003795 Rev. 3
Read this Instruction Manual
by qualified service personnel.
3797 / 3798
3801 / 3802
51-1483-06 Rev. B
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Summary of Contents for ThermoForma 3795
- Page 1 ThermoForma Millcreek Road, P.O. Box 649 Marietta, Ohio 45750 U.S.A. Telephone: (740) 373-4763 Telefax: (740) 373-4189 Models: 3795 / 3796 3797 / 3798 3799 / 3800 3801 / 3802 Laboratory Freezers Operating and Maintenance Manual Manual No. 7003795 Rev. 3...
- 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 Thermo Forma MODELS PART # FORMA MODEL # MODEL TYPE CUBIC FEET DOOR TYPE VOLTAGE 52-1996-25 3795 Freezer 27.3 1 Solid Hinged 52-1996-26 3796 Freezer 27.3 1 Solid Hinged 52-1996-27 3797 Freezer 49.1 2 Solid Hinged 52-1996-28 3798 Freezer 49.1...
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Page 5: Table Of Contents
Models: 3795 / 3797 / 3799 & Models: Control Panel ..........31 Export Models: 3796 / 3798 / 3800 3795 / 3796 3799 / 3800 / 3797 / 3798 Electrical Box Assembly Component Ident..... 17 Model: 3801 & Export Model: 3802 ......32... - Page 6 TABLE OF CONTENTS - continued SECTION III - MAINTENANCE & REPAIR SECTION IV - PARTS LISTS General Maintenance & Repair ........37 Replacement Parts List .......... 65 Service Information ............37 Accessories ............67 Compressor Installation ..........39 Lab & Pharmacy Refrigerators/Freezers & COMPONENT REPLACEMENT Chromatography Refrigerators Warranty ....
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Page 7: Handling & Installation
HANDLING & INSTALLATION FREIGHT DAMAGES & SHORTAGES properly grounded three-prong electrical outlet of 115 volt, 60 hz. The electrical outlet should not be controlled IMPORTANT by a wall switch which might be turned off accidentally. The cabinet was inspected and packaged at the UNCRATING THE CABINET factory, and should arrive in excellent condition. -
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: Cabinet Operation
CABINET OPERATION PRIOR TO STARTING THE CABINET There are two thermodiscs located on the evaporator Supply voltage must be checked in order to determine coil. The purpose of one is to keep the evaporator fan the correct position of the variable voltage switch motors and anti-condensate heaters off after defrost located on the auto transformer. -
Page 10: Dimensional Drawings
DIMENSIONAL DRAWINGS Low Temperature, Top Mount, Solid Pull Door Freezers 31" 52" 26 1/4" 47 1/4" Interior Interior 83 3/4" 83 3/4" 6" 6" SIDE VIEW 78" 36 9/16" 73 1/4" 33" Interior 29 5/8" 83 3/4" 6" GENERAL INFORMATION... -
Page 11: Specifications
Refrigerant Control Expansion Valve Expansion Valve Expansion Valve Amp Rating - Data Plate 3795: 7.7; 3796: 4.4 3797: 13.6; 3798: 8.2 3799: 16.0; 3800: 9.6 3801: 3.7; 3802: 1.8 Electrical Specs. (V / HZ / PH) 115 / 60 / 1 Export: 220 V / 50 Hz. -
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: Dim. Drawings / Elec. & Ref. Specs
SPECIFICATIONS: Low Temperature, Top Mount, Solid Pull Door Freezers Flammable Material Storage SPECIFICATION 3801 / 3802* Model: 3801 & Export Model: 3802 Capacity (cu.ft. / litres) 27.3 / 773 Temperature Range -30°C (-22°F) Exterior: (in.) HWD ⁄ X 31 X 36 ⁄... -
Page 14: Condensing Unit Assembly Component Ident
CONDENSING UNIT ASSEMBLY - 1-Door Top Mount Freezers Model: 3795 & Export Model: 3796 Component Identification (See Section IV Page 65 for Part Numbers.) GENERAL INFORMATION... -
Page 15: Component Identification
CONDENSING UNIT ASSEMBLY - 2 & 3-Door Top Mount Freezers Models: 3797 / 3799 Component Identification Export Models: 3798 / 3800 (See Section IV Page 66 & 67 for Part Numbers.) GENERAL INFORMATION... -
Page 16: Compressor Area Layout Component Ident
COMPRESSOR AREA LAYOUT -Component Identification Model: 3801 & Export Model: 3802 Flammable Material Storage (See Section IV Page 68 for Part Numbers.) GENERAL INFORMATION... -
Page 17: Evaporator Coil Assembly Component Ident
EVAPORATOR COIL ASSEMBLY - R-404A Component Identification Models: 3795 / 3797 / 3799 Export Models: 3796 / 3798 / 3800 ITEM DESCRIPTION Coil - Evaporator Coil - Evaporator Expansion Valve Copper Tubing - 1/4 Copper Tubing - 1/2 Wire Tie - Nylon... -
Page 18: Evaporator Fan Shroud Assem. Component Ident
EVAPORATOR FAN SHROUD ASSEMBLY Component Identification Models: 3795 / 3797 / 3799 & Export Models: 3796 / 3798 / 3800 ITEM DESCRIPTION Fan Shroud Fan Shroud Fan Shroud Screw -#10B x 1/2 Fan Guard Fan Motor - 115V Nut - Nylon Expansion Screw - #10-32 x 3/8 Washer - Ext. -
Page 19: Electrical Box Assembly Component Ident
ELECTRICAL BOX ASSEMBLY - 1-Door Component Identification Models: 3795 / 3797 / 3799 & Export Models: 3796 / 3798 / 3800 GENERAL INFORMATION... -
Page 20: Electrical Box Assembly Component Ident
ELECTRICAL BOX ASSEMBLY - 1 -Door Models Model: 3801 & Export Model: 3802 - Component Identification GENERAL INFORMATION... -
Page 21: Incandescent Light Assembly
INCANDESCENT LIGHT ASSEMBLY - Component Identification Models: 3795 / 3797 / 3799 & Export Models: 3796 / 3798 / 3800 ITEM DESCRIPTION Box, Light MTG Lamp Socket Incandescent Bulb Light Guard Screw - #8 Wire Lead Wire Lead Label - 40 Watt... - Page 22 GENERAL INFORMATION...
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Page 23: Section Ii - Electrical & Refrigeration Information
SECTION II Electrical & Refrigeration Information... -
Page 24: Component Specifications
GENERAL LOW TEMPERATURE FREEZER COMPONENT SPECIFICATIONS 1-DOOR 2-DOOR 3-DOOR Center Mullion Heater Total Watts 25 Total Watts 25 115V 529 Ohms 529 Ohms Perimeter Heater Total Watts 63.8 Total Watts 57.5 Total Watts 57.5 115V 207 Ohms 230 Ohms 230 Ohms Condensate Heater Total Watts 175 Total Watts 175... -
Page 25: Model: 3801 & Export Model: 3802
3.2 (Export: 1.9) 3.1 (Export: 1.9) NOTE: REFER TO SERIAL DATA PLATE FOR REFRIGERANT TYPE & CHARGE. REFRIGERATION SPECIFICATIONS Model: 3795 & Export Model: 3796 Low Temp., Solid, 1-Door Freezers SYSTEM COMPONENTS - R-404A Refrigerant Compressor Model Number Copeland RS43CIE-IAA Compressor Horsepower Recommended Operating Temp. -
Page 26: Model: 3797 & Export Model: 3798
REFRIGERATION SPECIFICATIONS Model: 3797 & Export Model: 3798 Low Temp., Solid, 2-Door Freezers SYSTEM COMPONENTS - R-404A Refrigerant Compressor Model Number Copeland KAGB-005E-IAA Compressor Horsepower Recommended Operating Temp. Range 0°F to -22°F (-18°C to -30°C) Cabinet Volts 115 / 60 / 1 (Export Transformer: 220V 50/60Hz.) Expansion Device Sporlan FBR- ⁄... -
Page 27: Control Panel Layout
CONTROL PANEL LAYOUT ELECTRICAL & REFRIGERATION INFORMATION... -
Page 28: General Information / Alarm System
CONTROL ANNUNCIATOR PANEL GENERAL 3. The digital process meter monitors cavity tempera- The control annunciator panel is designed to provide ture and displays the measurement on a LCD the user with a convenient way of monitoring cavity screen in degrees centigrade (°C). This thermome- conditions, turning the interior light on and off and ter is both solar powered and battery assisted. -
Page 29: Chart Recorder Features
EMERGENCY PROCEDURE PLANNING REPLACEMENT OF PEN Post adjacent to or on the cabinet instructions to follow All recorders are provided with fiber tipped cartridge in the event of an alarm condition. pens. The body of the cartridge is color coded to desig- nate the red (No. -
Page 30: Batterybackup
BATTERYBACKUP SETTING THE FIGURE 3 ALARM SET POINT If AC power fails the LED will change to short geen CHANGE CHART Press the “change chart” flashes. The 9 volt DC battery will allow the recorder to button (#3) to bring the sense and record temperatures for approximately 24 pen arm off the chart. -
Page 31: Cobex Model #C-921
COBEX Model #C-921 Description: 6" Skeleton 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 PAPER BY CHART RECORDER & TEMPERATURE RANGE Type of Temperature Box of Charts... -
Page 32: Models: 3795 / 3796 3799 / 3800
LADDER WIRING DIAGRAM *See page 33 for information on transformer. Models: 3795 / 3797 / 3799 & Export Models: 3796 / 3798 / 3800 ELECTRICAL & REFRIGERATION INFORMATION... -
Page 33: Wiring Diagrams
WIRING DIAGRAM *See page 33 for information on transformer. Models: 3795 / 3797 / 3799 & Export Models: 3796 / 3798 / 3800 ELECTRICAL & REFRIGERATION INFORMATION... -
Page 34: Model: 3801 & Export Model: 3802
WIRING DIAGRAM - 3801 & Export Model: 3802* *See page 33 for information on transformer. ELECTRICAL & REFRIGERATION INFORMATION... -
Page 35: Transformer Layout
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 36: Temperature Probe Bottle Instrucitons
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 37: 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 system processing. - Page 38 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.
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Page 39: General Maintenance & Repair
MAINTENANCE & REPAIR PRE-SERVICE CHECK LIST containers will contaminate other products. 4. Be sure to follow a weekly schedule for cleaning You may avoid the cost and inconvenience of an unnec- cabinet interior. essary product call by first reviewing this check list of the most frequently encountered situations that are not the SERVICE result of defective workmanship or materials. - Page 40 PRODUCT HISTORY If the compressor pulls less than 20 inches, the suction reeds have failed. The first rule in servicng a refrigeration system is to If the compressor takes longer than 40 seconds to pull determine if the problem is an electrical or mechanical to its ultimate low vacuum, one or both culinders are not failure.
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Page 41: Compressor Installation
Run the cabinet at both 100% run, and a cycling tem- Two types are used. The first type is connected direct- perature for at least 24 hours. If the temperature and ly to the compressor body or shell and back seats to pressures are correct, the system can be considered connect gauges to the access port. - Page 42 If items 3 and 4 are O.K., relay is good. If items 3 and To slope shelves, insert the cantilever plate tabs into 4 are not as indicated, change relay. the rectangular holes in the desired position on the shelf standard. Lift up on the rear of the shelf so that TO CHECK CAPACITORS the top tab is locked behind the top of the rectangular hole.
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Page 43: 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. quarter-turn fasteners. 2. Drop the front of the pan and swing it down. 3. -
Page 44: Thermostat
THERMOSTAT REPLACEMENT The thermostat is located just behind the control panel and can be accessed by removing the control panel or with the use fo a small step ladder. The thermostat is secured to the electrical wiring enclosure(Fig. A). The optional alarm thermostat is attached RH side of the control panel (Fig. -
Page 45: Condenser & Electrical Box Access
CONDENSER & ELECTRICAL BOX ACCESS TOP MOUNT MODELS Electrical box can be accessed by removing front grill or control panel. There are tabs on each end of control panel top. Remove lock down screws and lift up on panel. By lifting panel, the key slots disengage from the shoulder bushing located on each end of the panel. -
Page 46: Evaporator Fan Motor
EVAPORATOR FAN MOTOR REPLACEMENT The evaporator fan motor is located in the cabinet inte- rior 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 fan shroud. 4. -
Page 47: Solid Door Removal, Installation & Adjustment
INSTRUCTIONS - SOLID DOOR REMOVAL Installation & Adjustment MAINTENANCE & REPAIR... -
Page 48: Fan Delay & Defrost Term. Control
FAN DELAY & DEFROST TERMINATION CONTROL REPLACEMENT FAN DELAY: FIG. 1 1. Disconnect power supply from cabinet. 2. Turn two (2) quarter turn fasteners located at each end of the evaporator drain pan. 3. Remove the thermodisc and contact bracket from the coil. -
Page 49: Defrost Heater
DEFROST HEATER REPLACEMENT DISCONNECT THE POWER SUPPLY TO THE CABINET. 1. Turn quarter turn fasteners located on each end of the evaporator pan assembly. 2. Evaporator drain pan assembly will hinge down. 3. The defrost heater is located beneath the evapora- tor coil. -
Page 50: 3-Door Condensate Heater
2 & 3-DOOR CONDENSATE HEATER REPLACEMENT 1. Disconnect power to the cabinet. 2. Disconnect the heater lead from the back of the electrical box. 3. Determine if the heater thermodisc is open. If not, remove heater from the bracket tabs. 4. -
Page 51: Door Gasket
DOOR GASKET REPLACEMENT Thermo Forma gasketing is replaceable on glass or solid door models. A retainer is molded into the door frame. The door gasket is then tapped into the retainer and secured for airtight door seal. 1. Remove door from cabinet. 2. -
Page 52: Metering Device
METERING DEVICE REPLACEMENT The refrigerant metering device in this cabinet is expan- sion valve. It is located on the face of the evaporator coil behind the drain pan. 1. Disconnect power to the cabinet. 2. Remove the evaporator drain n pan. 3. -
Page 53: 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 54: Master Power Supply Switch
MASTER POWER SUPPLY SWITCH REPLACEMENT The master power supply switch on the top mount cabinets is located on the front top 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 55: Center Mullion
CENTER MULLION HEATER REPLACEMENT DISCONNECT POWER SUPPLY TO CABINET! Center mullion heaters not foamed in place on later models. The heater can be accessed from inside the cabinet. Remove lamp (if applicable). Spread inner plastic extrusion apart. Working down one side and then the other. Slide a putty knife about 3/4"... -
Page 56: Perimeter Heater
PERIMETER HEATER REPLACEMENT 1. Disconnect the power supply to the cabinet. 2. Allow trim to warm up. 3. Insert the edge of the putty knife ⁄ " under the outer flange of the trim breaker. 4. Rotate handle down to approximately. 45°. 5. -
Page 57: Cabinet Raceway / Door Switch
CABINET RACEWAY - DOOR SWITCH REPLACEMENT 1. Disconnect the power supply to the cabinet. 2. Access the raceway (top or bottom mount) by removing the front panels. 3. Remove the raceway cover. 4. Squeeze the plastic retainer and pop out of race- way. -
Page 58: 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 59: 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 leave residues, odors, or particles. -
Page 60: Troubleshooting Guides
TROUBLESHOOTING GUIDES UNIT WILL NOT RUN. Blown fuse. Check power outlet 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 61 NOISY OPERATION. Loose flooring or floor not firm. Tighten flooring or brace floor. Tubing contacting cabinet or other tubing. Move tubing gently! Cabinet not level. Level cabinet. Compressor mechanically gronded. Replace compressor mounts. Fan hitting drain pan or mechanically Move fan. grounding.
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Page 62: Compressor
COMPRESSOR TROUBLESHOOTING WON’T START. NO HUM. Open line circuit. Check wiring, fuses, receptacle. 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 63 STARTING CAPACITORS Short cycling. Reduce number of starts to 20 or less BURNT OUT per hour. Prolonged operation of starting winding. Reduce starting load (install crankcase pressure limit valve), increase voltage if low — replace relay if defective. Relay contacts sticking. Clean contacts or replace relay.
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Page 65: Section Iv - Parts Lists
SECTION IV Parts Lists... - Page 68 PARTS LIST...
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Page 69: 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 70 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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Page 71: Lab & Pharmacy Refrigerators/Freezers & Chromatography Refrigerators Warranty
WARRANTY INFORMATION... -
Page 72: Lab & Pharmacy Refrigerators/Freezers & Chromatography Refrigerators International Dealer Warranty
WARRANTY INFORMATION...
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