Forma Scientific 707, 771, 733, 754 User manual [en, fr]

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Page 1

Forma Scientific, Inc.

Millcreek Road, P.O. Box 649 Marietta, Ohio 45750

U.S.A.

Telephone: (740) 373-4763

Telefax: (740) 373-4189

________________________________________

Models:

707, 771, 733 and 754

Non-CFC, Ultra-Low Temperature

Chest Freezers

3.0 and 6.7 cu. ft. capacity

Manual No. 7000707 Rev. 3

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.

CAUTION: All internal adjustments and maintenance must be performed

by qualified service personnel.

Refer to the serial tag on the back cover of this manual

Page 2

Forma Model 700 Series ____________________________________________________

*Refer to listing of all model numbers on page ii.

*700 Series Freezers

707 6.7 cu ft 120V 771 6.7 cu ft 230V 733 3.0 cu ft 120V 754 3.0 cu ft 230V

The material in this manual is for information purposes only. The contents and the product it describes are subject to change without notice. Forma Scientific, Inc. makes no representations or warranties with respect to this manual. In no event shall Forma Scientific, Inc. be held liable for any damages, direct or incidental, arising out of or related to the use of this manual.

MANUAL NO. 7000707

3 19279/FR-1402 6/21/00 Revised electrical schematics aks 2 FR-1357 12/1/99 Updated per A. Thomas for IEC 1010 (CE listing) ccs

-- 18249/SI-7545 7/7/99 Added P/N 195518 & 195519 air filter kits to parts list ccp 1 18286/FR-1296 5/11/99 Updated schematics for 771/5477 ccp

-- -- 11/17/98 Added battery change note to Section 3.6 deg

--- FR-1223 6/8/98 Changed temp board heg

-- FR-1203 5/26/98 Added metric units to ref. drawing for IEC-1010 0 2/98 Original Manual deg

REV ECR/ECN DATE DESCRIPTION By

Page 3

Forma Model 700 Series ______________________________________________Service

Do You Need Information or Assistance on Forma



Products?

do, please contact us 8:00 a.m. to 7:00 p.m. (Eastern Time) at:

If you

1-740-373-4763Direct 1-888-213-1790Toll Free, U.S. and Canada 1-740-373-4189FAX http://www.forma.comInternet Worldwide Web Home Page [email protected] E-Mail Address

Our staff can provide information on pricing and giveyou quotations. We

Sales Support

can take your order and provide delivery information on major equipment items or make arrangements to have your local sales representative contact you. Our products are listed on the Internet and we can be contacted through our Internet home page.

Ourstaff can supply technical information about proper setup,

Service Support

operation or troubleshooting of your equipment. We can fill your needs for spare or replacement parts or provide you with on-site service. We can also provide you with a quotation on our Extended Warranty for your Forma products.

Whatever Forma products you need or use, we will be happy to discuss your applications. If you are experiencing technical problems, working together, we will help you locate the problem and, chances are, correct it yourself...over the telephone without a service call.



When more extensive service is necessary, we will assist you with direct factory trained technicians or a qualified service organization for on-the-spot repair. If your service need is covered by the warranty, we will arrange for the unit to be repaired at our expense and to your satisfaction.

Regardless of your needs, our professional telephone technicians are available to assist you Monday through Friday from 8:00 a.m. to 7:00 p.m. Eastern Time. Please contact us by telephone or fax. If you wish to write, our mailing address is:

ThermoQuest Forma Scientific Division Millcreek Road, PO Box 649 Marietta, OH 45750

International customers please contact your local ThermoQuest, Forma Scientific Division distributor.

Page 4

Forma Model 700 Series _______________________________________________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.

Wichtige Betriebs- und/oder Wartungshinweise. Lesen Sie den nachfolgenden Text sorgfältig.

Importante instruccions de operacion y/o mantenimiento. Lea el texto acompanante cuidadosamente.

Potential electrical hazards. Only qualified persons should perform procedures associated with this symbol.

Ce symbole attire l’attention de l’utilisateur sur des risques électriques potentiels. Seules des personnes qualifiées doivent appliquer les instructions et les procédures associées à ce symbole.

Gefahr von Stromschlägen. Nur qualifizierte Personen sollten die Tätigkeiten ausführen, die mit diesem Symbol bezeichnet sind.

Potencial de riesgos electricos. Solo personas das capacitadadas deben ejecutar los procedimientos asociadas con este simbulo.

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Forma Model 700 Series _______________________________________________Safety

Equipment being maintained or serviced must be turned off and locked off to prevent possible injury.

Risques potentiels liés à l’énergie. L’équipement en entretien ou en maintenance doit être éteint et mis sous clé pour éviter des blessures possibles.

Geräte, an denen Wartungs- oder Servicearbeiten durchgeführt werden, müssen abgeschaltet und abgeschlossen werden, um Verletzungen zu vermeiden.

El equipo recibiendo servicio o mantenimiento debe ser apagado y segurado para prevenir danos.

Hot surface(s) present which may cause burns to unprotected skin or to materials which may be damaged by elevated temperatures

Présence de surface(s) chaude(s) pouvant causer des brûlures sur la peau non protégée, ou sur des matières pouvant être endommagées par des températures élevées.

Heiße Oberfläche(n) können ungeschützter Haut Verbrennungen zufügen oder Schäden an Materialien verursachen, die nicht hitzebeständig sind.

Superficias calientes que pueden causar quemaduras a piel sin proteccion o a materiales que pueden estar danados por elevadas temperaturas.

√√ Always use the proper protective equipment (clothing, gloves, goggles etc.). √√ Always dissipate extreme cold or heat and wear protective clothing. √√ Always follow good hygiene practices. √√ Each individual is responsible for his or her own safety.

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Forma Model 700 Series _____________________________________________Contents

Section 1 - Installation and Start-Up

1.1 Unloading and Moving the Freezer.......................................................1-1

1.2 Getting to Know Your Freezer .............................................................1-2

1.3 Environmental Conditions....................................................................1-5

1.4 Installing the Wall Bumpers.................................................................1-5

1.5 Location ...............................................................................................1-6

1.6 Connecting the Alarm Battery..............................................................1-6

1.7 Remote Alarm Contacts........................................................................1-7

1.8 Optional Recorder ................................................................................1-7

a. Connecting recorder battery...........................................................1-7

b. Installing the chart paper...............................................................1-7

1.9 Attaching the Power Cord ....................................................................1-8

1.10 Power Switch (mains disconnect).......................................................1-8

1.11 Electrical Requirements and Connection .............................................1-9

1.12 Factory Settings...................................................................................1-9

1.13 Start Up and Loading...........................................................................1-9

Section 2 - Operation

2.1 Changing the Control Temperature Set Point........................................2-1

2.2 Changing the Over Temperature Alarm Set Point.................................2-1

2.3 Alarms..................................................................................................2-2

2.4 Silencing the Over Temperature Alarm ................................................2-3

Section 3 - Calibration

3.1 Temperature Display Calibration..........................................................3-1

3.2 Optional Recorder Calibration ..............................................................3-2

a. Changing the recorder range............................................................3-2

b. Calibrating the chart recorder..........................................................3-3

vii

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Forma Model 700 Series _____________________________________________Contents

Section 4 - Routine Maintenance

4.1 Cleaning the Cabinet Exterior ..............................................................4-1

4.2 Cleaning the Air Filter..........................................................................4-1

4.3 Cleaning the Condenser ........................................................................4-1

4.4 Defrosting the Chamber........................................................................4-2

4.5 Cleaning the Lid Gasket .......................................................................4-2

4.6 Replacing the Battery............................................................................4-3

4.7 Preparing the Unit for Storage...............................................................4-3

Section 5 - Service

5.1 Servicing the Refrigeration System ......................................................5-1

Section 6 - Specifications

Section 7 - Parts List

Section 8 - Refrigeration Drawings

Section 9 - Electrical Schematics

Section 10 - Warranty Information

viii

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Forma Model 700 Series ___________________________________Installation/Start-Up

Section 1 - Installation and Start-Up

1.1 Unloading and Moving the Freezer

To remove the freezer from the pallet, use the 7/16” wrench to remove all the bolts securing the shipping bracket to the pallet. Remove the shipping bracket. Remove the ramp boards from the pallet and place the slotted end over the ramp brackets on the pallet. The support blocks on the ramps will be facing down. Before moving the freezer, make sure the casters are unlocked and moving freely. Align the caster with the ramp boards. Use adequate personnel to roll the freezer off the pallet.

If tipped more than 45°, allow the unit to set upright for 24 hours before start up.

The freezer can be easily pushed to the desired approved location that is described in Section 1.5. When the freezer is in position, set the front caster brakes.

The freezer must not be moved with the product load inside.

1-1

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Forma Model 700 Series____________________________________Installation/Start-Up

1.2 Getting to Know Your Freezer

LED display - Shows

actual chamber temperature and indicates the control temperature set point when the Press-To-Set button is pressed.

Condenser Hot

indicator - Lights when the

thermostat on the condenser reaches 40°C, indicating typically a dirty air filter, a clogged condenser, a fan failure or high ambient temperature.

Set Point Adjustment

Screw - Sets the control temperature set point.

Normal/Standby

switch - Silences the audible alarm.

Figure 1-1, Control Panel

Low Battery indicator - Flashes when the battery needs to be replaced.

Over Temp indicator - Flashes when the chamber temperature rises above the

Over Temperature Alarm setting.

Voltage Compensation indicator - Indicates when the in-coming electrical

power is being automatically adjusted to ensure that the compressor operates within specification.

Press-to-Set button - Press to display control temperature set point.

1-2

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Forma Model 700 Series____________________________________Installation/Start-Up

3 1 2

1 2

Figure 1-2 Figure 1-3

3.0 cu. ft. Chest Freezer 6.7 cu. ft. Chest Freezer

Recorder

Probe

Probe Cover

Figure 1-4

Chest Freezer Base, back view

Figure 1-5

Chamber Probe Assembly

Performance Alarm Monitor and Temperature Probe

1-3

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Forma Model 700 Series____________________________________Installation/Start-Up

1.3 Environmental Conditions

The ULT Freezers are designed to be electrically safe in the following environmental

conditions:

• Indoors

• Altitude: Up to 2,000 meters

• Temperature: 5°C to 43°C

• Humidity: 80% RH at or below 31°C, decreasing linearly to 50% RH at 40°C

• Mains Supply Fluctuations: ±10% of nominal.

• Installation Category II

• Pollution Degree 2

• Class of Equipment I

• Climatic Class T (Tropical)

Installation category (overvoltage category) defines the level of transient overvoltage which the instrument is designed to withstand safely. It depends on the nature of the electricity supply and its overvoltage protection means. For example, in CAT II which is the category used for instruments in installations supplied from a supply comparable to public mains such as hospital and research laboratories and most industrial laboratories, the expected transient overvoltage is 2500V for a 230V supply and 1500V for a 120V supply.

Pollution degree describes the amount of conductive pollution present in the operating environment. Pollution degree 2 assumes that normally only non-conductive pollution such as dust occurs with the exception of occasional conductivity caused by condensation.

Class T (Tropical) means that the freezers are electrically safe in a 43°C ambient.

1.4 Installing the Wall Bumpers (Refer to Figure 1-4)

The parts bag, located inside the cabinet, contains the following parts.

Qty. Stock # Description Purpose

2 224 510016 1/4-20 x 5-1/2" Bolt Wall Bumper 2 311 380520 Neoprene Cap Cap Protector

Install the bolts into the pre-tapped holes on the back of the compressor section. Install a neoprene cap on each bolt. Refer to Figure 1-4 for the locations of the pretapped holes.

1-4

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Forma Model 700 Series____________________________________Installation/Start-Up

1.5 Location

Locate the freezer on a firm, level surface in an area with an ambient temperature between 18°C and 32°C. Provide ample room to reach the mains disconnect switch (power switch) located on the rear of the freezer.

For proper ventilation and airflow, a minimum of 5" of clear space is required around the freezer.

1.6 Connecting the Alarm Battery

NOTE: The battery must be connected upon start-up so that the alarm will activate during an Overtemperature condition.

1. To gain access to the battery, remove the grill on the front of the freezer. The grill is

attached to the freezer by friction plugs on each of the four corners and is readily pulled off. The battery is the rectangle fastened by Velcro to the compressor compartment frame and has a connector with red and black wires. Another red and black wire set with connector is secured to the wiring harness passing through the area of the freezer. Join the two wire connectors and replace the grill.

2. When the battery is connected, the OVERTEMP light will flash and the alarm will

sound. Turn the NORMAL/STANDBY switch to the STANDBY position. This will silence the alarm. The alarm will remain silent until the unit is below alarm setpoint. The alarm setpoint is factory set for -65°C. If another setpoint is required, see Section 2.2.

1-5

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Forma Model 700 Series____________________________________Installation/Start-Up

1.7 Remote Alarm Contacts

Remote alarm contacts are located on the rear of the unit. See Figure 1-6 for pin description, shown in the alarm state. The Forma part number for the plug required is 195482. Maximum rating for this plug is 1.0A @ 30VAC.

Remote Alarm Contact

Figure 1-6

1.8 (Optional) Temperature Recorder

a. Connecting recorder battery

Open the glass door of the recorder and connect the 9-volt battery. The green

light on the recorder will come on.

b. Installing the chart paper

1. Open the glass door of the recorder and press button #3 until the

pen begins to move outward.

2. Unscrew the knob at the center of the chart and remove the

paper.

3. Install the new chart paper, position the paper to the correct

time line and replace the knob.

4. Remove the cap from the felt pen and press button #3.

1 2

Program selection and calibration buttons

Green LED

9-volt battery

1 2

Figure 1-8 Chart Recorder, detail view

1-6

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Forma Model 700 Series____________________________________Installation/Start-Up

1.9 Attaching the Power Cord

1. Loosen screw (A) located on the power

cord retainer.

2. Spread the power cord retainer.

3. Insert the power cord into the power outlet

module (B).

4. Tighten screw (A) on the power cord

retainer.

Power Cord Assembly

Figure 1-9

Make sure the power cord connection is completely seated.

1.10 Power Switch (mains disconnect)

The power switch is located on the rear of the unit, directly above the power cord. The power switch is also a circuit breaker that protects the entire unit.

1.11 Electrical Requirement and Connection

• The freezer should be operated on a dedicated grounded service.

• Check voltage rating on the serial tag of the unit and compare it with the outlet voltage.

• With the power switch turned off, plug the line cord into the wall outlet.

1.12 Factory Settings

• Control Temperature – 707 & 771: -80°C

– 733 & 754: -75°C

• Over Temperature Alarm: -65°C

If you wish to change any of these settings, see the appropriate section(s) in Section 2.

1.13 Start Up and Loading

• Turn the freezer on and allow it to run empty overnight.

• When the empty freezer has stabilized overnight at the control temperature set point, load

the chamber with pre-frozen product.

The freezer was designed for the storage of pre-frozen product

only. The addition of warm product may cause a temporary rise in the cabinet temperature.

1-7

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Forma Model 700 Series____________________________________________Operation

Section 2 – Operation

2.1 Changing the Control Temperature Set Point

1. Remove the screwdriver on the front left corner of the control panel.

2. Press and hold in the PRESS-TO-SET key on the control panel.

3. Using the screwdriver, turn the SETscrew until the desired temperature is displayed.

Clockwise lowers the temperature and counter clockwise raises the temperature. The approved operating temperature range for the 707 & 771 is -50°C to -86°C and the range for the 733 & 754 is –50°C to –77°C.

The unit should NEVER be set to operate below the approved operating range. Setting the unit below this range will cause the compressors to operate continuously and reduce compressor life.

2.2 Changing the Over Temp Alarm Set Point

The following procedure sets the alarm for a precise temperature during initial set up. If a precise temperature is not required, set R9 to the desired temperature.

1. Set the unit to operate at the desired alarm

point (see Section 2.1) and allow the unit

to operate until it reaches the set point.

2. Remove the top two screws securing the

control panel and loosen the bottom two

screws. Carefully remove the control

panel.

3. Remove the six screws securing the cover of the

box attached to the inside of the control panel to

expose the alarm board.

Figure 2-1, Temperature

Alarm Circuit Board showing R-9 Control

4. Turn the switch on the control panel to the NORMAL position.

2-1

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Forma Model 700 Series____________________________________________Operation

5. If the unit alarms, slowly adjust R9 clockwise (warmer) until the alarm turns off. If the unit is

not in alarm, slowly adjust R9 counterclockwise (colder) until the alarm turns on.

6. The alarm is now set for the desired temperature. Reinstall the box cover and secure with

screws. Carefully install the control panel to its proper location and secure with screws.

7. Set the unit to the desired control temperature. See Section 2.1.

2.3 Alarms

Alarm Description Visual Audible Cause Action Required

Over Temperature Flashing

(red)

Condenser Hot On (red) ---

Low Battery Flashing

(red)

---

• Unit is above

alarm setpoint.

• Addition of

excessive product load

• Filter and/or

condenser dirty.

• Operating freezer

in greater than 40°C ambient.

• Rechargeable

battery not connected

• Rechargeable

battery needs replaced

• Check freezer

operation.

• See Section 4.2 and

4.3 for cleaning filter and condenser.

• See Section 1.6.

• Replace battery.

See Section 4.7 for battery replacement instructions. See spare parts list for battery part number.

Voltage Compensation

On (green) ---

2-2

• Incoming voltage

too high or too low

• Check if line

voltage is within operating range. See Section 6. If within specs, no action is required.

Page 17

Forma Model 700 Series____________________________________________Operation

2.4 Silencing the Over Temperature Alarm

• Move the switch from the NORMAL position to the STANDBY position. When the

alarm condition has been corrected, the alarm will sound. The switch must then be returned to the NORMAL position to exit STANDBY mode.

If the unit is left in the STANDBY mode, none of the alarms listed will sound, alarm lights only will turn on.

2-3

Page 18

Forma Model 700 Series ______________________________________________Calibration

Section 3 - Calibration

Calibration must be performed when the unit is at operating temperature.

Required equipment: Accurate low-temperature remote bulb thermometer or thermocouple of known accuracy.

3.1 Temperature Display Calibration

Place a measuring device near the

probe cover. See Figure 1-5.

1. Allow the unit to stabilize at the

operating temperature.

2. Remove the top two screws securing

the control panel and loosen the

bottom screws.

3. Carefully remove the control panel.

4. Remove the six screws securing the

cover of box attached to the inside of

the control panel. Remove the cover.

5. Adjust R17 until the control panel

display matches the independent

measuring device. Several turns of

R17 may be required to achieve the

desired temperature.

6. Reinstall cover to the box and secure.

7. Check the control temperature set point. Set

point may have been altered during the

calibration procedure.

Figure 3-1,

Temperature Control Board

showing R-17 Location

3-1

Page 19

Forma Model 700 Series ______________________________________________Calibration

3.2 Optional Recorder Calibration

a. Changing the recorder range:

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 of the chart

paper.

2. Press and hold for five seconds either button #1 or button #2.

3. Release the button and the green LED will begin to flash. Count the number of

flashes to determine the present program setting.

4. To change the program setting, press the left or right arrows to increase or decrease

the count.

5. When the desired program number is flashing, press button #3 to bring the pen arm

back onto the chart. Recording will begin in the new program.

NOTE: Changing ranges may require an offset calibration as outlined in Section 3.2.b.

Program No. Range

Program 1 -40°C to 30°C Program 2 0°C to 60°C Program 3 -100°C to 38°C Program 4 -5°C to 50°C Program 5 0°C to 100°C Program 6 -100°C to -200°C Program 7 -115°C to 50°C Program 8 -10°C to 70°C

Table 3-1

Recorder Range Chart

3-2

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Forma Model 700 Series ______________________________________________Calibration

b. Calibrating the chart recorder:

The recorder must be in service for 24 hours before performing the following

calibration procedure.

1. Place an accurate thermometer in the chamber next to the recorder probe.

2. Temperature probes for the recorder are located in the left front corner of the freezer

chamber (Figure 1-5).

3. After about three minutes, compare the thermometer reading with the chart recorder

reading.

4. If an adjustment is necessary, press the #1 button to move the pen to the left or the

#2 to move the pen to the right. The button must be held about five seconds before the pen begins to move. Release the button when the pen position matches the thermometer.

NOTE: The felt-tip pen on the recorder requires periodic replacement. Usually the ink will appear to fade before replacement becomes necessary. Additional pen tips may be

purchased from Forma Scientific. Refer to Parts List, Section 7. o

3-3

Page 21

Forma Model 700 Series _____________________________________________Maintenance

Section 4 - Routine Maintenance

4.1 Cleaning The Cabinet Exterior

Avoid the excessive use of water around the control area due to the risk of electrical shock. Damage to the controls may also result.

1. Wipe down the freezer exterior using soap and water and a general use laboratory disinfectant.

2. Rinse thoroughly with clean water and dry with a soft cloth.

4.2 Cleaning the Air Filter (minimum of twice a year*)

1. Locate the grille on the right side of control panel. See Figure 1-2 or 1-3. Grasp the

corner of the grille and gently pull to remove.

2. Remove the filter material and wash, using water and mild detergent.

3. Dry by pressing between two towels.

4. Install the filter back into the grille and attach the grille.

* Depending upon environmental conditions, the filter may need to be cleaned or replaced more frequently. If the filter becomes torn or excessively dirty, a replacement can be purchased from Forma Scientific. See the Parts List, Section 7, for filter part number. A filter kit (set of 5 filters) is also available.

4.3 Cleaning the Condenser (minimum of twice a year*)

1. Locate the grille on the right side of control panel. See Figure 1-2 or 1-3. Grasp the

corner of the grille and pull gently to remove.

2. Using a vacuum cleaner, exercising care to not damage the condenser fins, clean the

condenser.

3. Install the grille.

* Depending upon environmental conditions, the condenser may need to be cleaned more frequently.

4-1

Page 22

Forma Model 700 Series _____________________________________________Maintenance

4.4 Defrosting the Chamber

1. Remove all product and place it in another freezer.

2. Turn the unit off and disconnect it from the power source.

3. Turn the Alarm switch to STANDBY, or disconnect the battery.

4. Open all the doors and place towels on the chamber floor.

5. Allow the frost to melt and loosen.

6. Remove the frost with a soft cloth.

7. After defrosting is complete, clean the interior with a non-chloride detergent. Rinse

thoroughly with clean water and dry with a soft cloth.

8. Plug unit in and turn power switch on.

9. Allow the freezer to operate empty overnight before reloading the product.

4.5 Cleaning the Lid Gasket (minimum monthly*)

1. Using a soft cloth, remove any frost build up from the gasket, sub lids and lid. *The lid gasket may need to be cleaned more frequently if dirt or excessive frost build-up

prevents the door from closing properly.

4.6 Replacing the Battery

For a consistent and dependable charge, replace the battery every 2 years. Replacement batteries must be rechargeable and are available from Forma Scientific. Refer to the parts list for the stock number and description of the replacement batteries.

Dispose of used batteries in a safe manner and in accordance with good environmental practices.

4-2

Page 23

Forma Model 700 Series _____________________________________________Maintenance

1. Use the power switch and disconnect the line cord from the receptacl e to turn th e

unit off.

2. To gain access to the battery, remove the grill on the front of the freezer. The grill is

3. Disconnect the two wire connectors, replace the battery pack and secure with the

Velcro.

4. Reconnect the battery and replace the grill.

5. Plug unit in and turn power switch on.

4.7 Preparing the Unit for Storage

Defrost the unit as described in Section 4.4. This will prepare the unit for storage. ο

The battery must be disconnected to prevent the battery from becoming completely discharged during storage.

4-3

Page 24

Forma Model 700 Series ______________________________________________Service

Section 5 - Service

4.1 Servicing the Refrigeration System

Servicing must be only performed by service personnel qualified to repair cascade refrigeration systems. Always use standard safety practices when servicing any equipment.

Before opening the refrigeration system, use the troubleshooting chart below to check out the electrical system. Electrical schematics and refrigeration drawings with part numbers are included in this manual.

Symptom Possible Cause

No Temperature Display. • Power line cord disconnected or not

properly installed.

• External power circuit breaker

tripped/open.

• Main power switch OFF.

• 24V transformer fuses open.

Chamber Temperature Deviates from Setpoint.

Too Much Frost Build-Up. • Lid not properly sealed Freezer not Being Refrigerated (Unit is receiving Power).

Display Problems in General. • Defective temp control board. Condenser Hot Light On • Dirty air filter.

• Too much warm product added.

• Lid open too long.

• Inadequate air circulation.

• Unit is out of calibration.

• Dirty condenser.

• High ambient temperature.

• Compressor thermal overload open.

• Defective temp control.

• Defective high pressure cut-off.

• Defective compressor(s).

• Loss of refrigerant.

• Dirty condenser fan.

• Fan failure.

5-1

Page 25

Forma Model 700 Series _________________________________________Specifications

Section 6 - Specifications

3.0 cu. ft. Chest Freezers

Models 733 and 754

Temperature Exterior Dimensions

Interior Dimensions Refrigeration Capacity Insulation Type: Non-CFC urethane

Electrical 733: 120 VAC, 1PH, 60 Hz, 10.0 FLA

Breaker Requirements (Dedicated Circuit)

-50°C (-58°F) to –77°C (-106°F)

28.5" W x 41.8" H x 28.8" F-B (72.4cm x 106.2cm x 73.2cm) Add 6.5" (16.5cm) to F-B for handle/wall spacer

18.5" W x 16.5" H x 18.5" F-B (47cm x 41.9cm x 47cm) Cascade system, (2) hermetically-sealed compressors

3.0 cu. ft. (85 liters)

Sides: 5.0" (12.70cm) Lid: 2.0" (5.08cm) Sub Lid: 1.0" (2.54cm)

Operating Range: 108VAC - 130VAC 754: 230 VAC, 1 PH, 50 Hz, 8.0 FLA Operating Range: 208VAC - 240VAC

733: 15 Amp , 120V

754: 15 Amp, 230V Automatic Voltage Compensator

Shipping Weight (Non-CFC) Packaging

733:

Low:

Cut in: 110V, Cut out: 115V, Volts Boost: 10

High:

Cut in: 125V, Cut out: 120V, Volts Buck: 10

754: (Compressor only)

Low:

Cut in: 95V, Cut out: 100V, Volts Boost: 10

High:

Cut in: 110V, Cut out: 105V, Volts Buck: 10

Ocean: 450 lbs. (204 kg)

Air/Container: 412 lbs. (187 kg)

Motor: 375 lbs. (170 kg)

6-1

Page 26

Forma Model 700 Series _________________________________________Specifications

6.7 cu. ft. Chest Freezers

Models 707 and 771

Temperature -50°C (-58°F) to -86°C (-123°F) Exterior Dimensions 48" W x 41.8" H x 28.8" F-B

(121.9cm x 106.2cm x 73.2cm) Add 6.5" (16.5cm) to F-B for handle/wall spacer

Interior Dimensions 38.0" W x 16.5" H x 18.5" F-B

(96.5cm x 41.9cm x 47cm) Refrigeration Cascade system, (2) hermetically-sealed compressors Capacity 6.7 Cu. Ft. (190 liters) Insulation

Electrical

Breaker Requirements (Dedicated Circuit) Automatic Voltage Compensator

Type: Non-CFC urethane

Sides: 5" (12.7 cm)

Lid: 2" (5.08 cm)

Sub Lid: 1" (2.54 cm)

707: 120 VAC, 1PH, 60 Hz, 14 FLA

Operating Range: 108VAC - 130VAC

771: 230 VAC, 1 PH, 50 Hz, 8 FLA

Operating Range: 208VAC - 240VAC

707: 20 Amp , 120V

771: 15 Amp, 230V

Low:

Cut in: 110V, Cut out: 115V, Volts Boost: 10

Cut in: 210V, Cut out: 220V, Volts Boost: 18

High:

Cut in: 125V, Cut out: 120V, Volts Buck: 10

Cut in: 235V, Cut out: 225V, Volts Buck: 18

Shipping Weight (Non-CFC) Packaging

Ocean: 600 lbs. (272 kg)

Air/Container: 565 lbs. (256 kg)

Motor: 492 lbs. (223 kg)

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Forma Model 700 Series _______________________________________________Parts

Section 7 - Parts List

Models 733 and 754 (3.0 cu. ft. models)

Stock # Qty Description

191627 1 Temperature Control Board 195383 1 Thermostat 40°C 290165 1 Temperature Monitor Probe 400116 1 Battery, Dryseal pack 3.6V, AA 214006 1 Oil Separator 209003 1 Dryer 3/8 ODF 209006 1 Dryer 1/4 ODS 250111 1 Solenoid Valve, 120V 207010 1 Pressure Switch, Cutout (high pressure cut-out @ 350 PSIG) 900113 1 Tubeaxial Fan, 120V 760198 1 Air Filter, 11.4” x 14.4” 230110 2 1.0 Amp Fuse, Slo-Blow (Transformer) 420101 1 Transformer, 25 VA, 24Volt 1990150 1 Low Stage Compressor with Zerol 150T, 120V,1/4 HP (Models 733 & 754) 2990150 1 High Stage Compressor with Ester Oil, 120V, 1/4 HP (Models 733 & 754) 970023 70# cyl Refrigerant R-134A, High Stage 970022 70# cyl Refrigerant R-23, Low Stage 970009 14.5 oz Propane 970010 1 Propane Tank Adapter 143021 1 gal Zerol 150T

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Forma Model 700 Series _______________________________________________Parts

Models 707 and 771 (6.7 cu. ft. models)

Stock # Qty Description

191627 1 Temperature Control Board 195383 1 Thermostat 40°C 290165 1 Temperature Monitor Probe 400116 1 Battery, Dryseal pack 3.6V, AA 214006 1 Oil Separator 209003 1 Dryer 3/8 ODF 209006 1 Dryer 1/4 ODS 250111 1 Solenoid Valve, 120V 250115 1 Solenoid Valve (230V models only) 207010 1 Pressure Switch, Cutout (high pressure cut-out @ 350 PSIG) 900113 2 Tubeaxial Fan, 120V (Model 707) 900111 2 Tubeaxial Fan, 230V (Model 771) 760165 1 Air Filter, 11.4” x 25.9” 195519 1 (5) 760165 Air Filters 230110 2 1.0 Amp Fuse, Slo-Blow (Transformer) 420101 1 Transformer, 25 VA, 24Volt 1990209 1 Low Stage Compressor with Zerol 150T, 230V, 1/3 HP (Model 771) 2990209 1 High Stage Compressor with Ester Oil, 230V, 1/3 HP (Model 771) 1203017 1 Low Stage Compressor with Zerol 150T, 120V, 1/3 HP (Model 707) 2203017 1 High Stage Compressor with Ester Oil, 120V, 1/3 HP (Model 707) 970023 70# cyl Refrigerant R-134A, High Stage 970022 70# cyl Refrigerant R-23, Low Stage 970009 14.5 oz Propane 970010 1 Propane Tank Adapter 143021 1 gal Zerol 150T

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