Forma Scientific 707 User manual

Forma Scientific, Inc.
Millcreek Road, P.O. Box 649
Marietta, Ohio 45750
U.S.A. Telephone: [phone]
Telefax: [phone]
________________________________________
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

FormaModel 700 Series ____________________________________________________
ii
*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
319279/FR-1402 6/21/00 Revised electrical schematics aks
2FR-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
118286/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
02/98 Original Manual deg
REV ECR/ECN DATE DESCRIPTION By

FormaModel 700 Series ______________________________________________Service
iv
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:
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]mService E-Mail Address
If you
Our staff can provide information on pricing and giveyou quotations. We
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,
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.
Sales Support
Service Support


FormaModel 700 Series _______________________________________________Safety
v
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.

FormaModel 700 Series _______________________________________________Safety
vi
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.

FormaModel 700 Series _____________________________________________Contents
vii
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 .............................................................1-2
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

FormaModel 700 Series _____________________________________________Contents
viii
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

FormaModel 700 Series ___________________________________Installation/Start-Up
1-1
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.

FormaModel 700 Series____________________________________Installation/Start-Up
1-2
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.
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.
Figure 1-1, Control Panel
AA
B
C
D
E
F
H
G

FormaModel 700 Series____________________________________Installation/Start-Up
1-3
1 2
3
1 2
3
Figure 1-2 Figure 1-3
3.0 cu. ft. Chest Freezer 6.7 cu. ft. Chest Freezer
Figure 1-4
Chest Freezer Base, back view
Figure 1-5
Chamber Probe Assembly
Recorder
Probe
Probe
Cover
Performance Alarm
Monitor and
Temperature Probe

FormaModel 700 Series____________________________________Installation/Start-Up
1-4
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 1
•Pollution Degree 2 2
•Class of Equipment I
•Climatic Class T (Tropical)3
1 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.
2 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.
3 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 pre-
tapped holes.

FormaModel 700 Series____________________________________Installation/Start-Up
1-5
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.

FormaModel 700 Series____________________________________Installation/Start-Up
1-6
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 Formapart number
for the plug required is 195482.
Maximum rating for this plug
is 1.0A @ 30VAC.
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.
Figure 1-8 Chart Recorder, detail view
1 2
3
1 2
3
9-volt battery
Green LED
Program selectionand
calibration buttons
Figure 1-6
Remote Alarm Contact

FormaModel 700 Series____________________________________Installation/Start-Up
1-7
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.
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.
Figure 1-9
Power Cord Assembly
Make sure the power cord connection is completely seated.
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.

FormaModel 700 Series____________________________________________Operation
2-1
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.
4. Turn the switch on the control panel to the NORMAL position.
Figure 2-1, Temperature
Alarm Circuit Board
showing R-9 Control

FormaModel 700 Series____________________________________________Operation
2-2
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) On •Unit is above
alarm setpoint.
•Addition of
excessive
product load
•Check freezer
operation.
Condenser Hot On (red) --- •Filter and/or
condenser dirty.
•Operating freezer
in greater than
40°C ambient.
•See Section 4.2 and
4.3 for cleaning
filter and
condenser.
Low Battery Flashing
(red) --- •Rechargeable
battery not
connected
•Rechargeable
battery needs
replaced
•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) --- •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.

FormaModel 700 Series____________________________________________Operation
2-3
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.

FormaModel 700 Series ______________________________________________Calibration
3-1
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

FormaModel 700 Series ______________________________________________Calibration
3-2
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

FormaModel 700 Series ______________________________________________Calibration
3-3
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