Thermo Scientific 3881 Operating instructions

Model 3881, 3883, 3887 and 3889
Forma Blood Bank Refrigerators
Operating and Maintenance Manual 7033881 Rev. 1

Thermo ScientificThermo Scientific
MANUAL NUMBER 7033881
1 IN-3285 5/15/06 Revised refrigeration schematic aks
0 IN-3285 4/27/06 Release 6 (models 3881 and 3889) aks
REV ECR/ECN DATE DESCRIPTION By
Preface
7033881 Blood Bank i
Preface

Thermo Scientificii 7033881 Blood Bank Thermo Scientific
Preface
Important 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. ▲
Material in this manual is for information purposes only. The contents and the product it describes are subject to
change without notice. Thermo Scientific makes no representations or warranties with respect to this manual. In
no event shall Thermo be held liable for any damages, direct or incidental, arising out of or related to the use of
this manual.
©2003 Thermo Scientific. All rights reserved.

7033881 Blood Bank iii
Preface
Important operating and/or maintenance instructions. Read the accompanying text carefully.
Potential electrical hazards. Only qualified persons should perform procedures associated with this
symbol.
Equipment being maintained or serviced must be turned off and locked off to prevent possible injury.
Hot surface(s) present which may cause burns to unprotected skin, or to materials which may be
damaged by elevated temperatures.
Potential biological hazards - proper protective equipment and procedures must be used when
following instructions associated with this symbol. Reference O.S.H.A. Regulation 1910-1030.
Marking of electrical and electronic equipment, which applies to electrical and electronic equipment
falling under the Directive 2002/96/EC (WEEE) and the equipment that has been put on the market
after 13 August 2005.
This product is required to comply with the European Union’s Waste Electrical & Electronic
Equipment (WEEE) Directive 2002/96/EC. It is marked with the WEEE symbol. Thermo Scientific
has contracted with one or more recycling/disposal companies in each EU Member State European
Country, and this product should be disposed of or recycled through them. Further information on
Thermo’s compliance with this directive, the recyclers in your country and information on Thermo
products will be available at www.thermo.com.
✔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.
Thermo Scientific

Thermo Scientificiv 7033881 Blood Bank Thermo Scientific
Preface
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7033881 Blood Bank vThermo Scientific
Table of Contents
Receiving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 - 1
Preliminary Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 - 1
Visible Loss or Damage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 - 1
Responsibility for Shipping Damage . . . . . . . . . . . . . . . . . . . . . . . .1 - 1
Installation and Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 - 1
Location and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 - 2
Preparing the Performance Monitor/Alarm . . . . . . . . . . . . . . . . . . .2 - 2
Connecting the back-up battery . . . . . . . . . . . . . . . . . . . . . . . . . .2 - 2
Connecting to Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 - 4
Connecting RS-232 Communications . . . . . . . . . . . . . . . . . . . . . .2 - 4
RS-232 data format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 - 4
Connecting the Remote Alarm Relay . . . . . . . . . . . . . . . . . . . . . . .2 - 4
Connecting the Under and Over Temp Relays . . . . . . . . . . . . . . . .2 - 5
Installing the Temperature Probes . . . . . . . . . . . . . . . . . . . . . . . . . .2 - 7
Liquid temperature measurement . . . . . . . . . . . . . . . . . . . . . . . .2 - 7
Preparing the CoBex Chart Recorder . . . . . . . . . . . . . . . . . . . . . . .2 - 7
Installing the chart recorder battery . . . . . . . . . . . . . . . . . . . . . . .2 - 7
Installing the chart paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 - 7
Replacing the pen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 - 7
Changing the recorder range . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 - 7
Calibrating the chart recorder . . . . . . . . . . . . . . . . . . . . . . . . . . .2 - 8
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 - 1
Operating the Performance Alarm/Monitor . . . . . . . . . . . . . . . . . .3 - 1
Reading the Real-time Refrigerator Conditions . . . . . . . . . . . . . . .3 - 2
Setting the High and Low Temp Alarm Setpoints . . . . . . . . . . . . . .3 - 2
Setting the Month, Day, and Time . . . . . . . . . . . . . . . . . . . . . . . . .3 - 2
Interpreting the Alarm Information . . . . . . . . . . . . . . . . . . . . . . . .3 - 5
Calibrating the Temp Probes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 - 6
Overtemp and Undertemp Alarm Test . . . . . . . . . . . . . . . . . . . . .3 - 6
If the probe tests fail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 - 7
Silencing the Audible Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 - 7
Testing the Performance Alarm Battery . . . . . . . . . . . . . . . . . . . . . .3 - 7
Section 1
Section 2
Section 3

vi 7033881 Blood Bank Thermo Scientific
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 - 1
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 - 1
Interior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 - 1
Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 - 1
Door Gasket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 - 1
Drawer Removal and Installation . . . . . . . . . . . . . . . . . . . . . . . . .4 - 1
Troubleshooting and Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 - 1
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 - 1
Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 - 1
Refrigeration Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 - 1
Electrical Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 - 1
Warranty Information
Table of Contents
Section 4
Section 5
Section 6
Section 8
Section 7
Section 9
Section 10

7033881 Blood Bank 1-1Thermo Scientific
Section 1 Receiving
This laboratory refrigerator was thoroughly inspected and carefully packed
prior to shipment. All necessary precautions were taken to ensure safe
arrival. Immediately upon receipt, before the unit is moved from the
receiving area, carefully examine the shipment for loss or damage. Unpack
the shipment and inspect both interior and exterior for any in-transit
damage.
If any loss or damage is discovered, note any discrepancies on the delivery
receipt. Call the delivering carrier and request that their representative
perform an inspection. Do not discard any of the packing material and do
not move the shipment from the receiving area.
For products shipped F.O.B. Marietta, Ohio, the responsibility of Thermo
Scientific ends when the merchandise is loaded onto the carrier’s vehicle.
On F.O.B. Destination shipments, Thermo’s and the carrier’s responsibility
ends when your Receiving Department personnel sign a free and clear
delivery receipt.
Whenever possible, Thermo will assist in settling claims for loss or in-
transit damage.
Preliminary
Inspection
Visible Loss or
Damage
Responsibility for
Shipping Damage

7033881 Blood Bank 2-1Thermo Scientific
Section 2 Installation and Start-Up
Models 3881/3883 (120V, 60Hz) and 3887/3889 (230V, 50Hz) are Blood
Bank Refrigerators with built-in, over/under temperature alarm systems
and 7-day chart recorders as required by regulatory agencies for whole
blood storage. The Blood Bank Refrigerator provides consistent, reliable
protection of products at a safe 4°C.
The refrigerators feature adjustable stainless steel drawers that roll out for
easy access to inventory, high visibility glass doors and fluorescent lights to
provide unrestricted inventory viewing, plus an oversized refrigeration
system giving quick temperature recovery for maximum product protection
after door openings.
Figure 2-1. Blood Bank Refrigerators Models 3881/3889/3883/3887

2-2 7033881 Blood Bank Thermo Scientific
Section 2
Installation and Start-Up
Locate the refrigerator on a level surface in an area of 23°C, ±5° ambient
temperature fluctuation.
Allow eight (8) inches of clearance above the cabinet and three (3) inches
of clearance at the back and sides of the refrigerator. This space is necessary
to allow adequate airflow around the refrigeration system.
For better cabinet stability when the drawers are extended, adjust the
leveling feet so that the front of the cabinet is about 1/4” higher in the
front.
The Performance Alarm/Monitor (Figure 2-2) is a standard feature on
Blood Bank Refrigerators. Operating procedures for the monitor are
located in Section 3 of this manual.
To assure continued monitoring during a power outage or if the
refrigerator is intentionally unplugged, a back-up battery is on the printed
circuit board (part number 400116). Refer to Figure 2-4.
Note This battery is shipped in the Performance Alarm/ Monitor and must
be connected before connecting the unit to AC power. ▲
Location and
Installation
Preparing the
Performance
Monitor/Alarm
Figure 2-2. Performance Alarm/Monitor Control Panel
Connecting the Back-up
Battery

7033881 Blood Bank 2-3Thermo Scientific
Section 2
Installation and Start-Up
To access the circuit board, pull outward on the two
small, black plastic pins at the top and bottom of the
alarm/monitor control panel. (Refer to Figure 2-3.) A
noticeable “click” signals that they have released. The
battery pack is attached by hook and loop material
directly behind the liquid crystal display.
Plug the wires into the battery connector on the
circuit board, shown as item A in Figure 2-4.
If the battery pack is not plugged in, the liquid crystal display will show all
black when the refrigerator is turned on.
The circuit board is replaced by inserting the plastic pins completely into
their holes and pushing the top of the fastener inward until it “clicks.”
The battery pack is recyclable and should be disposed of accordingly.
Figure 2-3.
Figure 2-4. Circuit Board Component Locations
Connecting the Back-up
Battery (continued)

Connect the unit to an adequate dedicated power supply. Refer to the
electrical data plate for exact electrical specifications.
RS-232 data from the Alarm/ Monitor circuit board is provided by a RJ-11
telephone style connector located on the back of the cabinet. Refer to
Figure 2-5 for pin identification and Figure 2-10 for connector location.
Temperature data is transmitted once every hour in a 20-bit format, with
17 bits displayed on the terminal screen. The format first provides the
temperature (-)XX.X C, then OVER, UNDER, or (blank). Blank denotes
the temperature is within the upper and lower setpoints.
Sending an ASCII XON (DC1 (“11” hexadecimal) command to the RS-
232 enables this transmission, sending XOFF (DC3 (“13” hexadecimal)
stops it.
The remote alarm relay may be wired to a central remote alarm location or
to an independent alarm system.
Connection to the refrigerator is through an RJ-11 terminal block located
on the back of the cabinet. Pin identifications are shown in Figure 2-5.
2-4 7033881 Blood Bank Thermo Scientific
Section 2
Installation and Start-Up
Connecting to Power
Connecting RS-232
Communications
RS-232 data format
Figure 2-5. RS-232 and Remote Alarm Contacts
Connecting the
Remote Alarm Relay

A modular-to-modular cable (Stock No. 190388) and a RJ-11 telephone
style terminal converter (Stock No. 190392) or equivalent may be used to
convert remote alarm output to a screw terminal connection. Refer to
Figure 2-6.
Note These connections should only be made by some one familiar with
circuit boards. Proper grounding and connecting procedures must be
followed. ▲
Separate under and over temperature relays with Normally Open and
Normally Closed contacts are also part of the Alarm/Monitor design.
However, these contacts must be wired directly to the circuit board. Figure
2-7 identifies the connector blocks mounted along the bottom edge of the
board.
7033881 Blood Bank 2-5Thermo Scientific
Section 2
Installation and Start-Up
Figure 2-6. Terminal Conversion
Connecting the Under
and Over Temp Relays
Connect the Remote
Alarm Relay (cont.)

A hole with grommet is located on the rear of the cabinet adjacent to the
RJ-11 connectors to allow for passing through the alarm system wiring.
2-6 7033881 Blood Bank Thermo Scientific
Section 2
Installation and Start-Up
Figure 2-7. Under and Over Temp Relays
Figure 2-8. RS232 and Remote Alarm Location
Connect Under/Over
Temp Relays (cont.)

The temperature probes are located on the left
inside wall of the cabinet. Refer to Figure 2-9.
The probe bottles are secured in the brackets.
The top bracket location is for the upper
chamber and the recorder probes. The lower
bottle location is used for the lower chamber
probe.
The temperature probe connectors on the circuit
board are identified in the area marked “A” in
Figure 2-4.
For liquid temperature measurements, the bottles are filled with propanol,
or a 250-ml solution of 10 parts water and 1 part glycerol. The probes
must extend at least two inches into the solution and the bottle cap must
fit tightly to minimize evaporation.
The seven-day circular chart recorder is located on the top front of the
refrigerator cabinet and is protected by a glass door.
To prepare the recorder for operation, open the glass door and snap the
connector onto the 9-volt battery as shown in Figure 2-10. If the
refrigerator is operating, the green LED will show a steady light. If the
refrigerator is not turned on, the LED will flash.
Note If the battery is weak or not connected, the green LED will flash. If
power is lost to the cabinet, the LED will also flash as the refrigerator goes
into the alarm state. ▲
7033881 Blood Bank 2-7
Thermo Scientific
Section 2
Installation and Start-Up
Installing the
Temperature Probes
Figure 2-9. Temperature
Probe Location
Liquid temperature
measurement
Preparing the CoBex
Chart Recorder
Installing the chart
recorder battery
Figure 2-10. Chart Recorder

(Refer to Figure 2-11) Press and hold button #3
for about one second until the pen begins to
move to the left. Unscrew the knob at the center
of the chart and install the paper, positioning the
chart so the correct time line coincides with the
time line groove on the chart plate.
Replace the knob and press the #3 button until
the pen begins to move to the right.
Replacement pens may be ordered from Technical Services department. To
change the pen:
1. Using a small flat blade screwdriver, loosen the 2 screws holding the
pen arm and remove the pen and arm as an assembly.
2. Install the new pen assembly by sliding the inkless pen arm under the
screws, positioning the pen tip in the time line groove. Tighten the
screws.
3. Push the Chart Change button and hold it for 1 second until the pen
begins to move back onto the chart.
The chart recorder contains eight temperature ranges and is factory-
programmed for the refrigerator. To select another range, press and hold
button #3 until the pen moves off of the chart paper. Press and hold for
five seconds either button #1 or button #2. Release the button and the
green LED will begin to flash. The number of flashes corresponds to the
temperature ranges as shown in the table that follows.
2-8 7033881 Blood Bank Thermo Scientific
Section 2
Installation and Start-Up
Installing the chart paper
Replacing the pen
Figure 2-11
Changing recorder range
Program No. Range
Program 1 -40°C to 30°C
Program 2 0°C to 60°C
Program 3 -100°C to 39°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

Place an accurate thermometer in the chamber next to the recorder’s probe.
After about three minutes, compare the thermometer with the chart
recorder. If an adjustment is necessary, press either the #1 or #2 button to
move the pen left or right. The button must be held about five seconds
before the pen begins to move. Release the button when the pen matches
the thermometer.
7033881 Blood Bank 2-9Thermo Scientific
Section 2
Installation and Start-Up
Calibrating the chart
recorder

7033881 Blood Bank 3-1Thermo Scientific
Section 3 Operation
The Performance Monitor/Alarm is microprocessor controlled and
monitors the high and low temperatures of two, in-cabinet temperature
probes, sounding a tone and flashing warning lights when preset limits are
exceeded. The unit alerts the operator when a door is held open for more
than 30 seconds, and sounds a tone when main electrical power is
disrupted. A built-in counter also records the number of door
opening/closing cycles during a 24-
hour period. The count resets each
day at midnight.
Nine alarm occurrences are stored in
the monitor’s memory and may be
reviewed at any time by the
operator. High or low temperature
extremes are displayed along with
day, month, and time information.
The monitor control panel uses a
two-line liquid crystal (LCD), alpha-
numeric display and four pressure-
sensitive, data entry keys or buttons
which make a “click” when pressed.
The three buttons beneath the display are unmarked. Their functions are
identified in the LCD line above them, and change with the various
operating functions of the alarm/monitor.
The SCROLL button is used when programming the unit. Note The
center button is used to silence the audible alarm. ▲
Operating the
Performance
Alarm/Monitor
Figure 3-1. Alarm/Monitor Control Panel