Thermo Scientific Harris MBF-700 User manual

Installation and Operation Manual
Thermo Scientific®Harris MBF-700
Refrigeration System

©2009 Thermo Fisher Scientific. All rights reserved.
“Suva®” is a registered trademark of DuPont.
All other trademarks are the property of Thermo Fisher Scientific Inc. and
its subsidiaries.

Page 1
T HERMO S CIENTIFIC
TABLE OF CONTENTS
SECTION 1 – PRODUCT INTRODUCTION .........................................................................................................2
Safety Considerations ................................................................................................................................................................................................... 2
General Construction................................................................................................................................................2
SECTION 2 – RECEIVING AND UNPACKING...................................................................................................3
SECTION 3 -- INSTALLATION..................................................................................................................................5
I NSTALLATION C HECK L IST............................................................................................................................................................................................. 5
Loosening Compressor Mounts......................................................................................................................6
Chart Recorder .................................................................................................................................................7
Liquid CO2 Backup System........................................................................................................................................8
Water Cooled Unit Connections.....................................................................................................................9
SECTION 4 – CONTROL OPERATION............................................................................................................... 11
SECTION 5 –OPERATION AND MAINTENANCE......................................................................................... 13
Operator’s Responsibilities............................................................................................................................13
Cleaning the Freezer Surfaces .............................................................................................................. 14
Storage......................................................................................................................................... 14
Air Cooled Condenser...........................................................................................................................................14
Compressor Oil Level ...........................................................................................................................................14
LCO2 Vent............................................................................................................................................. 14

Page 2
SECTION 1 – INTRODUCTION
In this manual and on labels attached to this product, the words WARNING and CAUTION
mean the following:
WARNING: a potentially hazardous situation which, if not avoided, could result in
serious injury or death.
CAUTION: a potentially hazardous situation which, if not avoided, may result in
minor or moderate injury or damage to the equipment.
Before installing, using or maintaining this product, please be sure to read this manual and
product warning labels carefully. Failure to follow these instructions may cause this product
to malfunction, which could result in injury or damage.
SAFETY CONSIDERATIONS
Below are important safety precautions that apply to this product:
Use this product only in the way described in the product literature and in this manual.
Before using it, verify that this product is suitable for its intended use.
Do not modify system components, especially the controller. Use OEM exact
replacement equipment or parts. Before use, confirm that the product has not been
altered in any way.
Your unit must be properly grounded in conformity with national and local electrical
codes. Never connect the unit to overloaded power sources.
Disconnect the unit from all power sources before cleaning, troubleshooting, or
performing other maintenance on the product or its controls.
GENERAL CONSTRUCTION
The MBF-700 is a low temperature freezer designed to operate with a chamber
temperature in the range of–65 to –85 °C. (-85 to –121 °F.)
The cabinet configuration is that of a rectangular solid measuring 121” long
(307.3cm) x 47.5” high (120.7cm) with lid and all covers in place x 35.312” deep
(89.7cm). When installing the freezer, a minimum of six inches (6”) must be
provided on all sides of the freezer for proper air circulation.
Weight is 1510 lbs. (684.8Kg) net.
Shipping weight is 1790 lbs (811.8Kg).

Page 3
Figure 1 .General Freezer Outline
(see Figure 3for control panel details)
The interior useable space is also rectangular. The four corners are coved. With
insulating sub lids in place it measures 71” long (180.3cm) x 35.37” high (89.9cm) x
22.63” deep (57.5cm). The interior volume is 31 Ft. (878.7 liters.)
The cabinet is insulated with nominal 5” of foamed-in-place polyurethane insulation.
CAUTION
Do not discard the sub lids. They are necessary for the operation of the unit.
The refrigeration arrangement employed in this freezer is a specially designed assembly
using four semi- hermetic motor compressors. This design is termed a “redundant
cascade system”. Stainless steel storage racks for inventory control are available as an
option and must be ordered separately.
The lid is held tightly closed by means of cam locks having provision for a user supplied
padlock.
Durable corrosion protection is provided by an electrostatically applied epoxy fused
powder coating over cold rolled steel.
To provide a redundant refrigeration system, the inner tank is double wrapped with copper
tubing forming a dual circuit evaporator. In addition, each of these circuits has its own
compressor, condenser and liquid refrigerant control (capillary tube). Each of the
redundant systems will support full operation to maintain the storage temperature.
When set to alternate between system “A” and system “B”, refrigeration is applied to the
freezer chamber alternating between systems on each cycle.

Page 4
SECTION 2 – RECEIVING AND UNPACKING
At delivery, examine the exterior for physical damage while the carrier’s representative is
present. If exterior damage is present, carefully unpack and inspect the unit and all accessories
for damage. If there is no exterior damage, unpack and inspect the equipment within five days of
delivery. If you find any damage, keep the packing materials and immediately report the
damage to the carrier. Do not return goods to Thermo Scientific without written authorization.
When submitting a claim for shipping damage request that the carrier inspect the shipping
container and equipment.
RECEIVING
Note: Do not discard the sublids from chest-style units. The sublids are necessary to maintain
correct temperature, moisture control, and economy of operation.
UNPACKING
The tools necessary for unpacking are:
Hammer
Small pinch bar
Nail puller (handy but not required)
Side cutting pliers
CAUTION: Do not tip the unit over or stand it on end. Call the factory first for specific
instructions if unit absolutely must be tipped on end.
There are two Tiltwatch Labels affixed to the end of the freezer packaging. The center of these
labels has a small round window which turns bright red to signal mishandling of the product.
1. When shipment is received note the color of the indicators.
2. If either label has been activated, note on the delivery receipt which packages show a red
label and request the carrier’s driver to sign the receipt acknowledging that the label was
activated.
3. Before turning over the receipt to the driver, uncrate the unit and, if there is internal
damage, please note the fact on the delivery receipt. At this time you may refuse the
shipment.
4. The shipment will be removed by the carrier and returned to the warehouse. It is
recommended at this point that you call the manufacturer and advise of the condition of
the shipment.
5. After the protective packaging has been removed from the freezer, it will be left standing
on the shipping base with foam pads between the freezer and the shipping base.
6. To remove the freezer from the base, it is recommended hat a fork truck be used.
7. Slide the forks under the freezer from the front and at the center.
8. Raise it high enough to remove both foam pads and the shipping base.
9. Place blocks under one end of the freezer and lower the forks.

Page 5
SECTION 3 -- INSTALLATION
Do not attempt to operate this freezer until the preceding Installation Check List steps have
been completed.
INSTALLATION CHECK LIST
Date Initial
The freezer is in place.
The freezer has been leveled.
Check freezer data plate voltage.
Check supply voltage is the same as data plate.
Check that power panel circuit protection rating does not exceed that indicated on the data plate.
LCO2 supply valve is Off
Facility monitoring system connected to freezer’s remote alarm contacts.
Compressor shipping bolts have been loosened ( see the following section8)
If applicable, water supply and discharge are connected if unit uses a water-cooled condenser in
accordance with
WATER-COOLED CONDENSING UNIT CONNECTIONS ,
page 9.
No product loaded in freezer.
Main building power panel breakers are On.
Using key provided, turn the compressor key switch to ON.
Set primary control set points. ( see Section 4 for information on the control panel) — —
a Depress Scan button(key #7) until LED for temperature set point is lit (key #1a). Turn
cabinet temperature setpoint adjusting screw (key #4) until the desired temperature is
shown on the digital display (#12).
b Depress Scan button until LED for cold alarm set point (key #1b) is lit. Turn cold alarm
setpoint adjusting screw (#5) until the desired temperature is shown on the digital display
(key #12). It is recommended that this setting be 10
°
C colder than the control setpoint.
c Depress Scan button until LED for warm alarm set point (#1c) is lit. Turn warm alarm
setpoint adjusting screw (#6) until the desired temperature is shown on the digital display
(#12). It is recommended that this setting be 10
° C warmer than the control setpoint.
Turn LCO2 supply valve On after cabinet reaches operating temperature.

Page 6
LOOSENING COMPRESSOR MOUNTS
Compressors are mounted using the assembly illustrated at the right. When units are shipped from the
factory, the motor compressors are rigidly secured to the base by the mounting components. Before these
units are placed into operation, the Y2” top mounting nut must be loosened to allow the compressor to float
on the springs. Using a Y2” combination box and open-end wrench, loosen the nut enough for 1/16 inch
clearance between the nut and rubber spacer. If subsequent shipping is necessary, re-tighten the upper nut.

Page 7
CHART RECORDER
Set Up and Operation
To prepare the recorder to function properly, complete the
following steps:
1. Open the recorder door to access the recorder.
2. Connect the nine volt DC battery located at the recorder’s
upper right corner. This battery provides backup power.
3. Install clean chart paper.
4. Remove the plastic cap from the pen stylus and close the
recorder door.
Recorder operation begins when the system is powered on.The
recorder may not respond until the system reaches temperatures
within the recorder’s range.
Figure 1. Chart Recorder
Figure 2. Chart Buttons
CAUTION! Do not use sharp or pointed objects to
depress the chart buttons. This may cause permanent
damage to the recorder.
Power Supply
The recorder normally uses AC power when the system is
operating. If AC power fails, the LED indicator flashes to alert
you to a power failure. The recorder continues sensing cabinet
temperature and the chart continues turning for approximately
24 hours with back-up power provided by the nine-volt battery.
The LED indicator glows continuously when main power is
functioning and the battery is charged.
When the battery is low, the LED flashes to indicate that the
battery needs to be changed.
Changing Chart Paper
To change the chart paper, complete the following steps:
1. Locate the pressure sensitive buttons at the front, upper left
of the recorder panel.
2. Press and hold the Change Chart button (#3) for one second.
The pen will move off the scale.
3. Unscrew the center nut, remove the old chart paper, and
install new chart paper. Carefully align the day and time with
the reference mark (a small groove on the left side of the
recorder panel).
4. Replace the center nut and hand tighten. Press the Change
Chart button again to resume temperature recording.
Calibration Adjustment
This recorder has been accurately calibrated at the factory and
retains calibration even during power interruptions. If required,
however, adjustments can be made as follows:
1. Run the unit continuously at the control setpoint temperature.
Continue steady operation for at least two hours to provide
adequate time for recorder response.
2. Measure cabinet center temperature with a calibrated
temperature monitor.
3. Compare the recorder temperature to the measured cabinet
temperature. If necessary, adjust recorder by pressing the left
(#1) and right (#2) chart buttons.
Note: The stylus does not begin to move until the button is held
for five seconds.
9 Volt Battery
Imprinting
Stylus
Hub-Nut and
Retaining Wire
Chart
Chart Buttons
Reference
Mark
12
3
CHANGE CHART

Page 8
LIQUID CO2 BACKUP SYSTEM
When connected to a user supplied siphon tank of liquid CO2, the backup system will provide a source of
backup refrigeration in case of power failure to the mechanical refrigeration equipment. The control assembly
operates on 120VAC, 1
 , 60Hz. A backup battery supply is continuously charging for operation of the
backup system during power failure.
Installation
1.
Place the LCO2 control system on top of the System B mechanical section.
2.
Connect the LCO2 supply to the back of the control system.
3.
Connect theLCO2 distribution tube to the back of the unit.
4.
Connect the LCO2 temperature sensor to the Mate-N-Loc connector that hangs from the rear of System
B mechanical section.
5.
Connect the LCO2 control system harness to the Mate-N-Loc connector that hangs from the rear of
System B mechanical section.
6.
The assembly of the LCO2 to the cabinet is now complete.
NOTE
An LCO2 supply must be provided by the customer. The supply pressure must be 900 –
1,000 PSIG.
7. Uncoil the tubing from the control unit and connect to the LCO2 tank or supply connection.
8.
Turn on the LCO2 valve.
9.
Refer to the Backup System Owners Manual for operation instructions.
NOTE
LCO2 backup systems built by Harris Manufacturing are typically built with a relief
valve set for 1,300 PSIG.

Page 9
LCO2 Control System Battery Condition
The charge level light illuminates when the battery is below 80% of full charge. It is also possible that the
charge level light will illuminate when the control system is dispensing LCO2.
Placing LCO2 control system in storage
CAUTION
Any rise in temperature will cause a rapid rise of pressure of liquid CO2 trapped in the
supply line. After turning off the LCO2 supply, bleed the supply line by lowering the LCO2
setpoint sufficiently to cause the LCO2 solenoid to open. With the solenoid open,
disconnect the supply line from the backup system control unit.
WATER-COOLED CONDENSING UNIT CONNECTIONS
CAUTION ONLY QUALIFIED REFRIGERATION TECHNICIANS ARE TO MAKE CONNECTIONS OR
ADJUSTMENTS.
The MBF700 can be purchased with air-cooled condenser, water-cooled condenser, or both. If purchased
with water-cooled condensers, there are two water supply and two water discharge connections to be
made at the rear of the cabinet (see Figure 12) if you wish to use the water cooling feature:
1.
Locate the machine sections at each end of the freezer as you face the rear of the cabinet.
2.
At the bottom of each machine section are two 3/8” O.D. copper tubes stubbed out through the cabinet
grille (see diagram, next page). The outermost tubes are the COLD WATER INLET and the inner-most
tube is the WATER OUTLET.
• The four tubes terminate with 3/8” 45
°
SAE flare nuts.
NOTE If it is necessary to reship these units and water has been connected in the past, the lines
must be blown clear with compressed air in order to preclude freezing and rupturing the
water cooled condenser.
There are normally three possible sources of cooling water for these freezers, and any one may be
satisfactory used. They are:
1.
City water supply, discharge water wasted to drain.
2.
Chilled water from a building air conditioning chiller. In this case, the discharge water goes back to the
chilled water loop and is recirculated.
3.
Cooling tower water supply, discharge water goes back to the tower water loop.
Factory specification for maximum water supply temperature is 85
°
F. The automatic water regulating valve
allows use of any of these sources. Seasonal water temperature changes may require slight adjustment of the
water regulating valve. The factory setting is 195 PSIG.
The Selector Ball Valve can be accessed by removing the end cover on each of the machine compartments.
The valve may be identified by the square wrench flats on its top. The flow-indicating arrow will be
perpendicular to the tubing when the valve is closed, and parallel to the tubing when the valve is open.
NOTE Adjustment of the Selector Ball Valve is to be performed only by a qualified
refri
g
eration technician.
• For air cooling only, do not connect water and leave valve closed.
• For use with water cooling, connect water and open the valve.
To adjust the automatic water regulating valve for best operating economy, install a head pressure gauge;
with the compressor operating, turn the adjusting stem (located on top of the valve) until a head pressure of
195 PSIG is measured. Clockwise rotation of the adjusting stem lowers the head pressure; counterclockwise
rotation raises the head pressure.

Page 10

Page 11
SECTION 3 – CONTROL OPERATION
NOTE
A flat blade screwdriver (1/8” wide x 3 1/2” blade) will be required to adjust setpoints at items 4, 5, & 6.
1. Indicator LED’s for display modes.
a. Cabinet temperature setpoint (amber) b. Cold alarm setpoint (amber)
c. Warm alarm setpoint (amber) d. Cabinet temperature (green)
2.
Temperature failure LED (red) “ON” when cabinet temperature has exceeded set alarm points.
3.
Power failure LED (red) “ON” when AC power is not available at the freezer.
4.
Cabinet temperature setpoint adjusting screw. Sets control set point.
5.
Cold alarm setpoint adjusting screw. Sets cold alarm point.
6.
Warm alarm setpoint adjusting screw. Sets warm alarm set point.
7.
Scan button. Sets parameter displayed in digital display.
8.
Audio silence button. Temporarily silences local audio for 5-7 minutes.
9.
Alarm test button. Provides test of warm alarm point.
10.
Key-operated alarm ON/OFF switch. Turns on local audio alarm.
11.
Key-operated compressor ON/OFF switch. Turns on power to compressors and control system.
12.
Digital temperature indicator.
13.
Temperature recorder, 7-day, 6” diameter.
14.
System “B” indicator light. “ON” when system “B” 2
nd
stage running.
15.
System “A” indicator light. “ON” when system “A” 2
nd
stage running.
16.
Alternate system alarm indicator light. “ON” when auxiliary control causing both systems to operate.
17.
Heater switch. Operates breaker strip condensate heater.

Page 12
All controls are located at the right end of the cabinet. The labeled illustration on the next page shows the
panel top section with status indicator lights, control adjusting screws and system push buttons. Directly
below the control panel at the left is the Digital Display window. The Emergency Stop button is on the right.
NOTE
To set the adjusting screws, use a flat blade screwdriver with a 1/8” wide by approximately 3
1/2” long blade
Pressing the Scan button (item #7) repeatedly will sequentially light the red, green and amber status LED’s.
When the LED above the desired function is illuminated, turning the adjusting screw will change the digital
display indicating a change in the setting being made. When the green cabinet temperature LED is on, the
display will be indicating actual cabinet temperature.

Page 13
SECTION 4 – OPERATION AND MAINTENANCE
OPERATOR'S RESPONSIBILITIES
NOTE
These paragraphs define the Operator's responsibilities for reporting trouble symptoms on startup
of the freezer and also observing its operation on an ongoing basis in order to prevent any
mechanical or electrical failures that could result in loss of blood products.
Frequency Of
Task
Description Of Tasks, Observations & Record Keeping Requirements
a.
Time required for initial pulldown. If a freezer has been in warehouse storage for
any length of time, the joints between compressor gaskets for metallic mating parts
may leak refrigerant due to the gaskets drying out. If only partial loss of the
refrigerant has occurred, the sign will be slow pulldown time required reaching -80
°
C. Pulldown time should be 2.5 hours or less. If it is more than 2.5 hours, the
technician must either determine the cause and the remedy therefore or
IMMEDIATELY SHUT DOWN THE FREEZER until the problem can be
diagnosed and remedied.
b.
Carefully record the first few on-off periods with freezer empty, and then again
loaded with product. Keep this record with the freezer at all times for future
reference in troubleshooting.
Once on first
start
c.
If the installation is made in an air-conditioned area, there will not be much, if any,
change in cycle. However, if the ambient temperature is subject to changes, make a
record of cycle times at these various ambient temperatures.
a.
Listen for rattles. If refrigerant-carrying copper tubing is allowed to rub against
other tubes or any object, a leak will very quickly occur resulting in loss of the
refrigerant charge and cabinet temperature.
Daily
b.
Watch the system operation indicator light. It should not be showing the same
system always operating. For instance, when system A has been operating and shuts
off, system B should start on the next control call for cooling.
a.
Air-Cooled units only: clean the condenser air filter when its original jet-black color
has changed. Attention to this detail will assure shortest running times and
prolong the life of the freezer.
b. Make sure the lid closes without interference and that sub lids are always in place.
c. Ensure that the sub lids are in place.
Weekly
d.
Verify that the LCO2 vent is free of frost accumulation.
a.
Watch for lid gasket tears. Streaks of frost will collect inside the freezer at the
precise location of the torn or cut gaskets.
On Using
b.
Defrost the cabinet if frost or ice build-up exceeds 1/4” thickness: remove product,
turn power key switch Off, leave unit open 48 hours, remove moisture, restart unit.
Call the Maintenance Department or the manufacturer’s Technical Service group (1-800-438-4851) for
assistance.

Page 14
MAINTENANCE PROCEDURES
CLEANING THE FREEZER SURFACES
The inside and outside of the freezer are coated with a heat fused epoxy powder finish. It may be cleaned
with any non-abrasive cleaner such as hand dish washing detergent. To prevent odors on the inside of the
freezer after cleaning, it is recommended that, after cleaning with detergent, the entire surface be wiped
with a clean cloth soaked with a solution of one-half(1/2) gallon of water and one-quarter (1/4) cup of
baking soda.
STORAGE
Before placing the freezer in storage, turn the key switch to Off, unplug the power cord, open the lid and
allow the interior to warm up to ambient temperature. Dry out the interior. Prop the lid open at least 6" and
secure in this position. If water cooling has been used, the water lines of BOTH water cooled condensers
must be blown out to prevent freezing.
AIR COOLED CONDENSERS
Because heavy traffic areas are dustier than others, a cleaning schedule for air-cooled condensers and
filters is difficult to predict. A suggested schedule, however, is 6 months, which can be adjusted as
needed. Access to the filters is gained by removing the three screws at the outboard edge of both front
hinged panels and swinging them open. The filter will come out and can be washed with a mild detergent,
rinsed and replaced. It is not necessary to dry the filter. The condenser coil itself may be vacuumed clean at
the same time.
COMPRESSOR OIL LEVEL
Lubricating oil is retained in both the compressor crankcase and in passages below the motor rotor. It will
not leave the compressor unless a serious refrigerant leak has occurred. Oil slingers at the motor end of the
crankshaft pick up the oil and feed it to the crankshaft. Centrifugal force then delivers oil under pressure to
the bearings, crank pins, etc. THE UNIT MUST BE LEVEL. If the compressor end is too low, oil cannot
reach the slingers. These compressors have a sight glass and the oil level should be visible in the upper half
of the glass. Too much oil encroaches on the clearance space between the rotor and stator of the motor and
should be avoided.
FAN MOTORS
One or more cooling fans are provided in the machine compartment of Harris freezers, whether water-
cooled or air-cooled. No oiling is necessary. During periodic maintenance, these fans should be checked
for operation. If the compressors are running but any one of the fan motors is not, the inoperative one must
be replaced.
DEFROSTING
Chest type freezers do not require defrosting more often than once every six months to a year unless they
are subject to heavy usage. Frost will begin to build at first around the top of the inner liner and will
decrease in proportion to the distance from the top. Frost or “snow” will be the most apparent accumulation
and it may be removed with a plastic scraper. If any hard ice has developed, do not chip it using metallic
objects. Instead, remove all products stored in the freezer, turn the key “off”, unplug the unit, and allow it
to warm up. When temperature has risen far enough, the ice can be readily dislodged.
To check gaskets for proper sealing, use a 2” x 6” piece of paper (a dollar bill is handy) closed between the
gasket and the lid at 12” intervals around the perimeter of the lid. At each position, pull on the free end of
the paper. A slight resistance should be felt. While performing this test, inspect the gasket for cuts or tears.
An improperly sealing gasket must be replaced.
LCO2 VENT
On a semi-annual or monthly basis (depending on frequency of lid opening), verify that the LCO2 vent is
free of dirt and frost/ice accumulation that might interfere with the venting function.

WEEE Compliance
WEEE Compliance. This product is required to comply with the European
Union’s Waste Electrical & Electronic Equipment (WEEE) Directive 2002/96EC.
It is marked with the following symbol. Thermo Fisher Scientific has contracted
with one or more recycling/disposal companies in each EU Member State, and this
product should be disposed of or recycled through them. Further information on
our compliance with these Directives, the recyclers in your country, and
information on Thermo Scientific products which may assist the detection of
substances subject to the RoHS Directive are available at www.thermo.com/
WEEE Konformittät. Dieses Produkt muss die EU Waste Electrical & Electronic
Equipment (WEEE) Richtlinie 2002/96EC erfüllen. Das Produkt ist durch
folgendes Symbol gekennzeichnet. Thermo Fisher Scientific hat Vereinbarungen
getroffen mit Verwertungs-/Entsorgungsanlagen in allen EU-Mitgliederstaaten
und dieses Produkt muss durch diese Firmen widerverwetet oder entsorgt werden.
Mehr Informationen über die Einhaltung dieser Anweisungen durch Thermo
Scientific, dieVerwerter und Hinweise die Ihnen nützlich sein können, die Thermo
Fisher Scientific Produkte zu identizfizieren, die unter diese RoHS.
Anweisungfallen, finden Sie unter www.thermo.com/
Conformità WEEE. Questo prodotto deve rispondere alla direttiva dell’ Unione
Europea 2002/96EC in merito ai Rifiuti degli Apparecchi Elettrici ed Elettronici
(WEEE). È marcato col seguente simbolo.Thermo Fischer Scientific ha stipulato
contratti con una o diverse società di riciclaggio/smaltimento in ognuno degli Stati
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Important
For your future reference and when contacting the factory, please have the
following information readily available:
Model Number:
Serial Number:
Date Purchased:
The above information can be found on the dataplate attached to the
equipment. If available, please provide the date purchased, the source of
purchase (manufacturer or specific agent/rep organization), and purchase
order number.
IF YOU NEED ASSISTANCE:
SALES DIVISION
Phone: [phone] (866-9-THERMO)
LABORATORY PARTS and SERVICE
Phone: [phone]
TECHNICAL SUPPORT
Phone: [phone]

Thermo Fisher Scientific Inc.
275 Aiken Road
Asheville, NC 28804
United States
www.thermofisher.com
316004H01