CSZ Blanketrol III 233 User manual


Operation and Technical Manual
Model 233 Hyper-Hypothermia Units
Cincinnati Sub-Zero Products, Inc. •12011 Mosteller Road •Cincinnati, Ohio 45241, U.S.A.
www.cszmedical.com
In Europe: •CEpartner4U •Esdoornlaan 13, 3951 DB Maarn.
The Netherlands
Manual 56201 Rev. A, ECN: M602-3259


Water
Temperature
Silence
Alarm
Temperature Set
Risk of Explosion:
Do not use in the
Presence of Flammable
Anesthetics
Danger; Risk of
Electric Shock
Disconnect Power
Before Servicing
Patient
Temperature
Automatic
Control Manual
Control
Test Indicators
Monitor
Only
10C
Gradient 10˚C
V
Gradient
Variable
5C
Smart
Mode
Water Flow
Indicator Fill to Strainer Outlet
Inlet
Low Water
Level
Power Failure
Symbol
Definitions
Read Operation
Instructions and Manual
Before Operating
Separate collection for
electrical and electronic
equipment
Power Cord
Holder
ESD
Susceptibility Type B
Equipment

BLANKETROL®III
OPERATION AND TECHNICAL MANUAL
Cincinnati Sub-Zero Products, Inc., reserves the right to make equipment changes and improvements, which
may not be reflected in this manual.
WARNING
• A physician's order is required for setting blanket temperature and use of equipment. At
least every 20 minutes, or as directed by physician, check patient's temperature and skin
condition of areas in contact with blanket; also, check blanket water temperature. Pediatric
patients, temperature-sensitive patients with vascular disease, surgical patients, diabetics
and Raynauds disease patients should be checked more frequently. Notify the
physician promptly of any change in patient status in order to avoid serious injury
or death.
• The method of temperature control provided by all hyper-hypothermia units presents the
danger of heating or cooling body tissues, particularly the skin, to a point where they are
injured, i.e., burns or frostbite, respectively. Depending on the extent and severity of a
burn, very serious and even fatal complications may arise.
• Prevent excessive and/or prolonged tissue pressure and shearing forces, especially over
bony prominences, to prevent skin damage that may result.
• Do not place additional heat sources between the patient and blanket. Skin damage may
result.
• The area between the patient and the blanket should be kept dry to avoid injury to
patient. Prep solutions have been reported to injure the skin when allowed to remain
between patients and a water-circulating heating blanket during prolonged procedures.
• Proper sanitation procedures must be practiced and hygienic safety must be
maintained, to prevent contamination. Contamination can affect patient’s health, i.e.
skin irritation/rash may result.
• Use only YSI 400 Series, or equivalent, probes on CSZ equipment (refer to Figure (6-8.)).
Failure to do this will cause incorrect temperature readings and may result in
inadequate/inappropriate treatment.
• Do not use the BLANKETROL III system in the presence of flammable anesthetics. Risk
of explosion can result.
• Power interruption will cause the BLANKETROL III to revert to CHECK SET POINT
resulting in no therapy to the patient. Follow instructions for desired mode to resume
operation. Failure to resume therapy could result in serious injury or death.
• Do not by-pass ground lug. Electrical Hazards may result.
• Any time water is found leaking into or around the unit, connecting hose, and/or
blanket, turn the unit off, disconnect the power cord from its power source, and correct
the problem before proceeding. Water leaks could lead to electric shock.
• Water leaks present a risk of infection and should be handled accordingly. Proper
sanitation procedures should be followed including, but not limited to, the preventative
maintenance described in this manual. Leaky blankets or hoses, as well as
unapproved blankets or hoses should never be used.
• Exercise extreme caution if the unit is used for patients who are electrically
susceptible (probe, catheter, or electrodes connected to the heart).
• Do not position unit near any objects that can generate a strong electrical/magnetic
field. Unit has been investigated to be in compliance with IEC 60601-1-2. Potential
electromagnetic interference may result.
• Always unplug the unit before accessing internal components during service. Failure
to unplug the unit could result in electric shock.
Manual 56201 Rev. A, ECN: M602-3259

WARNING
• The repair, calibration, and servicing of the BLANKETROL III should be performed by
qualified Medical Equipment Service Technicians, Certified Biomedical Electronics
Technicians, or Certified Clinical Engineers familiar with good repair practices for servicing
medical devices, and in accordance with instructions contained in this manual. Improper
repair can result in damage to the BLANKETROL III system and patient injury.
• Before returning the BLANKETROL III to patient use after repairs, the FIRST TIME SET-
UP/SYSTEM TEST ROUTINE in Section 2 must always be performed. Improper repair
and inadequate maintenance can result in damage to the BLANKETROL III system
and patient injury.
• Remove the BLANKETROL III from service if the outer casing or membrane control panel
is cracked or internal components are exposed. Contact with internal components
could result in electric shock or thermal injury to the patient or operator and
exposure to sharp edges.
• Keep grill and condenser clean and free of debris and obstruction. Blockage of the grill
and condenser could result in the unit overheating which could render the unit
unable to provide adequate therapy and excessive surface temperatures could
cause injury of patient or operator. Keep unit, specifically the grill away from
curtains or other obstructions.
CAUTION
• Use distilled water only. Do Not Use De-Ionized water.
• Do not use alcohol. Alcohol may cause blanket and unit deterioration.
• Use only hospital grade plug or electric shock may result.
• Do not overfill. Overfilling may result in overflow when the water in the blanket drains back
into the system when the system is turned off.
• Always drain the BLANKETROL III to a sanitary drain because bio-contaminants may be
present in the unit’s water supply.
• Handling or use of the patient probe may result in damage from electrostatic discharge
(ESD) if proper precautions are not taken.
• If possible, remove the probe from patient contact before activating an
electrosurgical unit. The RF interference may cause the patient temperature display to
move up and down and cycle the machine from cooling to heating or vice versa.
• Do not immerse the probe jack connector in liquid.
• Working with electronic boards, plugs, and cables requires delicate handling. Proper
Electrostatic Discharge procedure should be followed during replacement of any
electronic board.
BLANKETROL®, MAXI-THERM®, MAXI-THERM LITE®, and PLASTI-PAD® are registered
trademarks of Cincinnati Sub Zero Products, Inc., Cincinnati, Ohio USA.
©Copyright 1982, Cincinnati Sub-Zero Products, Inc. All rights reserved.
TABLE OF CONTENTS
TECHNICAL HELP .................................................................................................................................................. 1

AUTHORIZED EUROPEAN REPRESENTATIVE:.............................................................................................1
BEFORE YOU CALL FOR SERVICE................................................................................................................... 1
IN-WARRANTY REPAIR AND PARTS............................................................................................................... 1
RECEIVING INSPECTION ..................................................................................................................................... 1
IMPORTANT SAFETY INFORMATION .............................................................................................................. 1
SECTION 1. INTRODUCTION .............................................................................................................................. 2
1-0. GENERAL SAFETY PRECAUTIONS ................................................................................................... 2
1-1. GENERAL DESCRIPTION OF THIS MANUAL................................................................................... 2
1-2. GENERAL DESCRIPTION OF THE BLANKETROL III SYSTEM..................................................... 3
1-3. CLINICAL APPLICATIONS................................................................................................................... 3
1-4. PHYSICAL DESCRIPTION OF THE BLANKETROL III UNIT .......................................................... 4
1-4.1. EXTERNAL FEATURES - FRONT VIEW ..................................................................................... 4
1-4.2. EXTERNAL FEATURES - RIGHT SIDE VIEW ............................................................................ 6
1-4.3. EXTERNAL FEATURES - REAR VIEW........................................................................................ 8
1-4.4. EXPANDED DESCRIPTION OF THE BLANKETROL III MEMBRANE CONTROL PANEL 10
1-5. REQUIRED ACCESSORIES................................................................................................................. 12
1-6. FUNCTIONAL DESCRIPTION OF THE BLANKETROL III SYSTEM ............................................ 12
1-6.1. THEORY OF OPERATION ........................................................................................................... 12
1-6.2. HEATING SYSTEM........................................................................................................................ 14
1-6.3. COOLING SYSTEM ....................................................................................................................... 14
1-6.4. CIRCULATING SYSTEM.............................................................................................................. 14
1-6.5. TEMPERATURE SAFETY CONTROL SYSTEM........................................................................ 15
1-6.6 USB PORT OPERATION............................................................................................................... 16
SECTION 2. GENERAL PREPARATION OF THE BLANKETROL III SYSTEM ................................... 17
2-1. INTRODUCTION .................................................................................................................................. 17
2-2. UNPACKING THE SHIPMENT ........................................................................................................... 17
2-3. FIRST TIME SET-UP/SYSTEM TEST ROUTINE............................................................................... 17
2-3.1. INSPECTING AND ARRANGING THE EQUIPMENT............................................................... 18
2-3.2. COMPLETING A SYSTEM TEST ROUTINE .............................................................................. 19
2-4. UNIT AND PATIENT RELATED PRECAUTIONS ............................................................................ 26
2-5. PATIENT PREPARATION AND BEDSIDE CARE ............................................................................ 27
SECTION 3. OPERATING THE BLANKETROL III UNIT ............................................................................. 30
3-1. INTRODUCTION .................................................................................................................................. 30
3-2. ARRANGING THE SYSTEM COMPONENTS ................................................................................... 30
3-3. OPERATING THE BLANKETROL III UNIT IN AUTO CONTROL MODE ...................................... 33
3-4. OPERATING THE BLANKETROL III UNIT IN MANUAL CONTROL MODE................................. 35
3-5. OPERATING THE BLANKETROL III UNIT IN MANUAL CONTROL MODE WITH THE
ADDITION OF THE PATIENT PROBE ............................................................................................... 37
3-6. OPERATING THE BLANKETROL III UNIT IN GRADIENT 10C MODE ........................................ 38
3-7. OPERATING THE BLANKETROL III UNIT IN GRADIENT 10C SMART MODE ........................... 40
3-8. OPERATING THE BLANKETROL III UNIT IN GRADIENT VARIABLE MODE ............................. 42
3-9. OPERATING THE BLANKETROL III UNIT IN GRADIENT VARIABLE SMART MODE................ 45
3-10. OPERATING THE BLANKETROL III UNIT IN MONITOR ONLY MODE....................................... 47
3-11. CONCLUDING HYPER-HYPOTHERMIA TREATMENT................................................................. 48
3-12. STATUS DISPLAY MESSAGES.......................................................................................................... 49
SECTION 4. GENERAL MAINTENANCE OF THE BLANKETROL III SYSTEM ..................................... 56
4-1. INTRODUCTION .................................................................................................................................. 56
4-1.1. TEST EQUIPMENT REQUIRED.................................................................................................... 57
4-2. MAINTENANCE OF THE WATER RESERVOIR .............................................................................. 59
4-2.1. DRAINING THE RESERVOIR...................................................................................................... 61
4-2.2. REPLENISHING THE RESERVOIR............................................................................................. 62
4-3. MAINTENANCE OF THE WATER FILTER....................................................................................... 62
4-4. MAINTENANCE OF THE CONDENSER AND GRILL ..................................................................... 63
4-5. MAINTENANCE OF THE BLANKETROL III EXTERIOR – CLEANING INSTRUCTIONS ......... 64
Manual 56201 Rev. A, ECN: M602-3259

4-6. MAINTENANCE OF THE HYPER-HYPOTHERMIA BLANKETS .................................................. 64
4.6.1 PLASTIPAD REUSABLE BLANKET........................................................................................... 64
4-6.2. MAXI-THERM, AND MAXI-THERM LITE HYPER-HYPOTHERMIA BLANKETS .............. 65
4-7. MAINTENANCE OF REUSABLE THERMISTOR PROBES ............................................................. 65
4-8. LOW LIMIT SAFETIES CHECK.......................................................................................................... 66
4-9. HIGH LIMIT SAFETIES CHECK......................................................................................................... 67
4-10. TEMPERATURE ACCURACY CHECK.............................................................................................. 68
SECTION 5. FIELD REPAIR/SERVICE OF THE BLANKETROL III UNIT ............................................... 69
5-1. INTRODUCTION................................................................................................................................... 69
5-2. ACCESS TO THE INTERIOR OF THE BLANKETROL III UNIT..................................................... 72
5-2.1. REMOVING THE REAR ENCLOSURE PANEL ......................................................................... 72
5-2.2. REPLACING THE REAR ENCLOSURE PANEL......................................................................... 72
5-2.3. REMOVING THE TOP OF THE UNIT ......................................................................................... 72
5-2.4. DISCONNECTING THE CABLES FROM THE MICROPROCESSOR BOARD ....................... 73
5-2.5. EXTENDING THE FRONT STORAGE DRAWER ...................................................................... 74
5-2.6. REPOSITIONING THE FRONT STORAGE DRAWER............................................................... 74
5-3. REPLACEMENT OF THE HEATER .................................................................................................... 74
5-4. REPLACEMENT OF THE WATER FILTER ASSEMBLY................................................................. 75
5-5. REPLACEMENT OF THE PUMP HOUSING...................................................................................... 76
5-6. REPLACEMENT OF THE PUMP MOTOR ......................................................................................... 77
5-7. REPLACEMENT OF THE FLOW SWITCH ........................................................................................ 79
5-8. REPLACEMENT OF THE WATER TEMPERATURE SENSOR ....................................................... 80
5-9. REPLACEMENT OF THE UPPER AND/OR LOWER WATER MANIFOLDS ................................ 80
5-10. REPLACEMENT OF THE COMPRESSOR STARTING CAPACITOR, THE OVERLOAD
PROTECTOR, AND/OR THE COMPRESSOR RELAY...................................................................... 82
5-11. REPLACEMENT OF THE THERMAL DISC OVER TEMPERATURE DEVICE.............................. 82
5-12. REPLACEMENT OR CLEANING OF THE WATER FLOW INDICATOR ASSEMBLY ................ 83
5-13. REPLACEMENT OF THE ON/OFF POWER SWITCH ...................................................................... 84
5-14. REPLACEMENT OF THE WATER LEVEL SENSOR ASSEMBLY ................................................. 85
5-15. REPLACEMENT OF THE MICROPROCESSOR BOARD AND/OR THE MEMBRANE
CONTROL PANEL................................................................................................................................ 86
5-16. LEAKAGE CURRENT .......................................................................................................................... 87
5-16.1. ARRANGING THE EQUIPMENT................................................................................................. 87
5-16.2. TAKING MEASUREMENTS IN NORMAL POLARITY............................................................. 87
5-16.3 TAKING MEASUREMENTS IN REVERSE POLARITY ............................................................ 88
5-17. REFRIGERANT CHECK....................................................................................................................... 88
5-18. TROUBLESHOOTING GUIDE ............................................................................................................ 89
SECTION 6. PARTS INFORMATION ................................................................................................................ 97
6-1. INTRODUCTION .................................................................................................................................. 97
6-2. ORDERING INFORMATION FOR REPLACEMENT PARTS........................................................... 97
6-3. RECOMMENDED REPLACEMENT PARTS INVENTORY.............................................................. 97
6-4. RETURNING PARTS UNDER WARRANTY ..................................................................................... 98
6-5. SHIPPING PARTS ................................................................................................................................. 98
SECTION 7. SPECIFICATIONS AND CERTIFICATIONS OF THE BLANKETROL III ........................ 108
TABLE OF FIGURES
Figure 1-1. BLANKETROL III Unit - Front View .................................................................................................5

Figure 1-2. BLANKETROL III Unit - Right Side View .........................................................................................7
Figure 1-3. BLANKETROL III Unit - Rear View...................................................................................................9
Figure 1-4.A. BLANKETROL III Unit – Membrane Control Panel......................................................................11
Figure 1-4.B. BLANKETROL III Unit – Membrane Control Panel......................................................................12
Figure 4-1. MAINTENANCE CHECK LIST ........................................................................................................58
Figure 5-1. BLANKETROL III Unit - Exposed Rear View .................................................................................71
Figure 6-1. PARTS LIST A ......................................................................................................................................99
Figure 6-2. BLANKETROL III Unit - Internal Exploded Front View.............................................................100
Figure 6-3. PARTS LIST B.....................................................................................................................................101
Figure 6-4. BLANKETROL III Unit - Internal Exploded Rear View ..............................................................102
Figure 6-5.A. ELECTRICAL WIRING DIAGRAM - 115V .................................................................................103
Figure 6-5.B. ELECTRICAL WIRING DIAGRAM - 230V .................................................................................104
Figure 6-6. WATER CIRCULATION DIAGRAM ............................................................................................105
Figure 6-7. REFRIGERATION FLOW DIAGRAM..........................................................................................106
Figure 6-8. BLANKETROL III SYSTEM ACCESSORIES ....................................................................... 107
Table 7-1. GUIDANCE AND MANUFACTURER’S DECLARATION – ELECTROMAGNETIC
EMISSIONS FOR BLANKETROL III ..........................................................................................110
Table 7-2. GUIDANCE AND MANUFACTURER’S DECLARATION – ELECTROMAGNETIC
IMMUNITY FOR BLANKETROL III...........................................................................................110
Table 7-3. GUIDANCE AND MANUFACTURER’S DECLARATION – ELECTROMAGNETIC
IMMUNITY FOR BLANKETROL III THAT IS NOT USED FOR LIFE SUPPORT .........111
Table 7-4. RECOMMENDED SEPARATION DISTANCES BETWEEN PORTABLE AND MOBILE
RF COMMUNICATIONS EQUIPMENT AND THE BLANKETROL III ........................... 112
Manual 56201 Rev. A, ECN: M602-3259

TECHNICAL HELP
United States and Canada Telephone [phone]
Cincinnati Sub-Zero Products, Inc. Toll Free 1-800-989-7373
12011 Mosteller Road Fax [phone]
Cincinnati, OH 45241
Authorized European Representative:
CEpartner4U Telephone [phone]
Esdoornlaan 13
3951 DB Maarn
The Netherlands
BEFORE YOU CALL FOR SERVICE...
To help us better serve you, please have the serial number of your BLANKETROL III unit ready
when you call for parts or service.
IN-WARRANTY REPAIR AND PARTS
All parts on your BLANKETROL III unit are covered by a two-year (2) warranty. Additional third
year warranty is available at the time of purchase. To return defective parts or units, first obtain
a Returned Materials Authorization (RMA) number from our Medical Technical Service
department.
RECEIVING INSPECTION
After unpacking the BLANKETROL III System, be sure to inspect the system for concealed
damage. Retain all packing material and carefully describe or photograph any damage. Notify
the carrier at once and ask for an inspection (in writing). Failure to do this within 15 days may
result in loss of claim. Do not return the equipment to Cincinnati Sub-Zero. Call our Medical
Technical Service department for further instructions.
IMPORTANT SAFETY INFORMATION
Refer to this manual for instructions and caregiver information. Read and understand all
precautionary information before using, prescribing, or servicing the BLANKETROL III unit.

INTRODUCTION BLANKETROL III, Model 233
OPERATION AND TECHNICAL MANUAL
SECTION 1. INTRODUCTION
1-0. GENERAL SAFETY PRECAUTIONS
To provide the patient maximum safety during the use of the BLANKETROL III hyper-
hypothermia system, a thorough knowledge and understanding of the system, and its correct
application and operating use are required. Each person who is responsible for use or direction of
use of the system, such as physicians, nurses, technicians and operators must read and
understand this operating manual and all precautions and warnings prior to use. It is
recommended this manual be reviewed at least semi-annually as a refresher to safe operation and
application. For proper knowledge and understanding, in-service is available upon request.
1-1. GENERAL DESCRIPTION OF THIS MANUAL
This manual describes the operation, maintenance, and service of the CSZ BLANKETROL III
hyper-hypothermia system. Section one describes the physical and functional characteristics of
the BLANKETROL III System. Section two describes how to prepare the BLANKETROL III unit for
general use. Section three describes how to operate the unit in the MANUAL CONTROL MODE,
AUTO CONTROL MODE, GRADIENT 10C MODE, GRADIENT 10C SMART MODE, GRADIENT
VARIABLE MODE, GRADIENT VARIABLE SMART MODE,and MONITOR ONLY MODE.
Section four describes the regular maintenance of the BLANKETROL III unit. Section five
describes Field Repair and Service of the BLANKETROL III unit and contains a troubleshooting
guide. Section six outlines parts information and section seven lists the specifications of the
BLANKETROL III.
This manual is prepared for professional personnel who use the BLANKETROL III for patient care
as well as technicians and service personnel who are responsible for maintaining the equipment.
All personnel who operate or service the unit should be familiar with all parts of this manual.
However, Sections one, two, and three are primarily intended for personnel who unpack and setup
the unit. Section three is primarily intended for personnel who operate the unit, and Sections three
through six are primarily intended for personnel who service and repair the unit. Section (1-4.)
describes the external features of the BLANKETROL III and Section (3-12.) describes display
messages. These sections should be consulted if questions arise over the terminology used in this
manual.
Operating modes are described in Section (1-6.1.) and are highlighted throughout the manual in
italics and capital letters. Button names and display messages are shown in all capital letters.
Manual 56201 Rev. A, ECN: M602-3259
2

INTRODUCTION BLANKETROL III, Model 233
OPERATION AND TECHNICAL MANUAL
1-2. GENERAL DESCRIPTION OF THE BLANKETROL III SYSTEM
The CSZ BLANKETROL III (Model 233) Hyper-Hypothermia System is used to lower or to raise a
patient's temperature and/or maintain a desired patient temperature through conductive heat
transfer. The CSZ BLANKETROL III unit is composed of a heater, a compressor, a circulating
pump, and a microprocessor. This unit requires no field adjustments or calibrations in order to
maintain the precise board measurement of temperature and temperature limits.
Distilled water is heated or cooled and pumped from the unit to a blanket. The blanket* rests
under and/or on top of the patient and is designed so that the water circulates through the blanket
and returns to the unit.
If water that is at a lower temperature than the patient’s temperature is circulated through the
blanket, the desired effect is to reduce the patient's temperature. If water that is at a higher
temperature than the patient’s temperature is circulated through the blanket, the desired effect is
to elevate the patient's temperature.
The BLANKETROL III unit can be set so that it operates based on the temperature of the
circulating water (MANUAL CONTROL MODE) or it can be set so that it operates based upon the
patient’s temperature (Automatic Modes). The five Automatic modes include:
1) AUTO CONTROL MODE
2) GRADIENT 10C MODE
3) GRADIENT 10C SMART MODE
4) GRADIENT VARIABLE MODE
5) GRADIENT VARIABLE SMART MODE
The BLANKETROL III unit can also be used solely to monitor the temperature of the patient
(MONITOR ONLY MODE).
The Blanketrol III is intended for use in ambient temperatures of 15°C – 30°C (59°F – 86°F). The
maximum contact surface temperature expected is 42°C (107.6°F).
* The recommended blanket(s) for use are described in Section (1-5.)
1-3. CLINICAL APPLICATIONS
The BLANKETROL III unit is used primarily in hospital Intensive and Coronary Care Units, in
Operating, Recovery and Emergency Rooms, in Burn Units, and on Medical/Surgical floors. This
hyper-hypothermia system can be used with adult and pediatric patients to produce normothermia
by lowering a patient's elevated temperature or raising a patient's sub-normal temperature. It can
also be utilized to maintain normal body temperature (normothermia) during surgical procedures.
Surgically, this system can be used to produce moderate to profound hypothermia for such
procedures as amputations, cardiopulmonary by-pass surgery, vascular surgery, and intracranial
surgery. Medically this system can be used to decrease the rate of circulation, to reduce
Manual 56201 Rev. A, ECN: M602-3259 3

INTRODUCTION BLANKETROL III, Model 233
OPERATION AND TECHNICAL MANUAL
intracranial pressure, to control cerebral edema, and to reduce oxygen requirements. This system
is also used in the treatment of burns, shock, cardiac arrest, and gastrointestinal hemorrhage.
1-4. PHYSICAL DESCRIPTION OF THE BLANKETROL III UNIT
See Section (7) for specifications and certifications of the BLANKETROL III.
1-4.1. EXTERNAL FEATURES - FRONT VIEW
The external features in Figure (1-1) of the BLANKETROL II unit are described as follows:
A. The control panel is composed of pressure sensitive touch switches, nine LED
indicators, a liquid crystal display, and two LED displays. An expanded description of
the membrane control panel is presented in Section (1-4.4).
B. The power switch is a bevel rocker switch labeled “I” (on) at the top and “O” (off) at
the bottom. The switch lights up green when the unit is on. A circuit breaker is built-
in the switch to protect against overload conditions.
C. The storage drawer tilts out from the top to provide storage space for items such as
probes, connector cables, connecting hoses, the drain hose, and the Operator's
Manual.
D. The grill permits air to be drawn into the unit and pass over the condenser. The air is
then discharged through the bottom of the unit. The grill and compressor should be
kept clear from blockage and cleaned regularly as described in Section (4-4.). For
example, keep grill away from curtains and other obstructions.
E. The protective bumper guard surrounds the lower edge of the unit and protects the
unit as well as the walls.
F. Four conductive, swivel casters are specially designed to permit the unit to move
easily and to prevent it from tipping.
Manual 56201 Rev. A, ECN: M602-3259
4

INTRODUCTION BLANKETROL III, Model 233
OPERATION AND TECHNICAL MANUAL
FIGURE 1-1. BLANKETROL III, FRONT VIEW
Manual 56201 Rev. A, ECN: M602-3259 5

INTRODUCTION BLANKETROL III, Model 233
OPERATION AND TECHNICAL MANUAL
1-4.2. EXTERNAL FEATURES - RIGHT SIDE VIEW
The external features in Figure (1-2.) of the BLANKETROL II unit are described as follows:
A. The water flow indicator is a paddle wheel immersed in the path of the circulating
water with a window to the outside. As water is circulated through the system, it
must pass over the paddle wheel causing it to spin (like a pinwheel). The water
flow indicator provides a visual display of the general rate at which the water is
circulating. For example, if the unit is circulating water but the connecting hose is
pinched, the circulation of the water is restricted. The change in water flow
decreases the speed of the paddle wheel.
The water flow indicator only spins when a blanket or by-pass hose is connected to
the unit. It will not spin when water is circulated internally to pre-condition the water.
A total obstruction of the water path will cause the paddle wheel to stop completely.
B. The recessed handle permits the operator to grip the unit when moving it.
C. The four capped screws on the right and left side of the unit secure the top to the
base.
D. The patient probe jack is where the 400 Series probe (refer to Figure (6-8.)) is
connected to the unit. Only one patient probe can be connected at a time.
E. Three female, quick-disconnect return couplings on the top row are designed for
water to flow in when the male coupling of the connecting hose is attached.
F. The three male quick-disconnect outlet couplings on the bottom row are designed
for water to flow out when the female coupling of the connecting hose is attached.
G. The power cord with a hospital-grade plug should only be inserted into a properly
grounded hospital grade receptacle for 115 VAC units and 230 VAC units.
Electrical Specifications are described in Section (7.).
Manual 56201 Rev. A, ECN: M602-3259
6

INTRODUCTION BLANKETROL III, Model 233
OPERATION AND TECHNICAL MANUAL
FIGURE 1-2. BLANKETROL III, RIGHT SIDE VIEW
Manual 56201 Rev. A, ECN: M602-3259 7

INTRODUCTION BLANKETROL III, Model 233
OPERATION AND TECHNICAL MANUAL
1-4.3. EXTERNAL FEATURES - REAR VIEW
The external features in Figure (1-3.) of the BLANKETROL III unit are described as follows:
A. The specification label outlines the BLANKETROL III unit's electrical requirements.
B. The maintenance label outlines the periodic checks for the BLANKETROL III unit.
C. The air vents, on both the right and left side of the unit, provide air circulation for the
microprocessor.
D. The nylon strap is used to secure and store the coiled power cord when not in use.
E. The rear enclosure panel secured with four screws provides access to the interior.
The panel is removed to perform maintenance, repair, or replacement of
components.
F. The water fill opening is where the operator pours distilled water into the unit to fill the
reservoir.
G. The operating instructions are printed directly on the back lid of the unit. This allows
the operator to clearly see the directions and efficiently use the unit.
H. The USB port for future data reporting functions.
Manual 56201 Rev. A, ECN: M602-3259
8

INTRODUCTION BLANKETROL III, Model 233
OPERATION AND TECHNICAL MANUAL
FIGURE 1-3. BLANKETROL III, REAR VIEW
Manual 56201 Rev. A, ECN: M602-3259 9

INTRODUCTION BLANKETROL III, Model 233
OPERATION AND TECHNICAL MANUAL
1-4.4. EXPANDED DESCRIPTION OF THE BLANKETROL III MEMBRANE CONTROL
PANEL
The membrane control panel as shown in Figure (1-4.A.) for 115 Volt and (1-4.B) for 230 Volt is
composed of pressure sensitive touch switches and LED displays.
The membrane control panel is divided into the following sections:
A. The green digital display labeled WATER shows the actual temperature of the
circulating water.
B. The MANUAL CONTROL button is used to activate the unit so that operation is
based on the temperature of the circulating water relative to the set point
temperature.
C. The green digital liquid crystal display reports the status of the unit, indicates the
set point, and/or indicates changes the operator should make. It is referred to as
the status display. The possible status displays are listed in Section (3-12.).
D. The TEMP SET button and the Up and Down arrow buttons are used to set the set
point display.
E. The green digital display, labeled PATIENT, shows the actual temperature of the
patient.
F. The AUTO CONTROL button is used to activate the AUTO CONTROL MODE. In
this mode the operation is based on the temperature of the patient relative to the
set point temperature.
G. The GRADIENT 10C button is used to activate the GRADIENT 10C MODE. Its
operation is based on the temperature of the patient relative to the set point
temperature.
H. The GRADIENT VARIABLE buttons is used to activate the unit GRADIENT
VARIABLE MODE. Its operation is based on the temperature of the patient relative
to the set point temperature.
I. The SMART button is used to activate the SMART function in the appropriate
modes.
J. The MONITOR ONLY button is used to set the unit to monitor the temperature of
the patient without heating, cooling or circulating the water.
K. The two switches labeled TEST INDICATORS and SILENCE ALARM are used to
confirm that all the indicators on the membrane control panel are working and to
silence the alarm in certain conditions.
L. The POWER FAILURE symbol flashes the red LED to the left of the symbol and
sounds an audible alarm when the unit loses power or when power has been
interrupted, restored, and the unit does not resume previous operation.
Manual 56201 Rev. A, ECN: M602-3259
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INTRODUCTION BLANKETROL III, Model 233
OPERATION AND TECHNICAL MANUAL
M. The LOW WATER symbol indicates when the unit is low on water by flashing the
red LED to the left of the symbol, sounding an audible alarm and displaying ”LOW
WATER” in the status display. Refer to Section (3-12-D. Low Water).
N. C/F button allows the operator to select the measurement scale, Celsius or
Fahrenheit, by which the unit functions. It is only available on 115 Volt units.
FIGURE 1-4.A. BLANKETROL III MEMBRANE CONTROL PANEL, 115 VAC UNITS
Manual 56201 Rev. A, ECN: M602-3259 11

INTRODUCTION BLANKETROL III, Model 233
OPERATION AND TECHNICAL MANUAL
FIGURE 1-4.B. BLANKETROL III MEMBRANE CONTROL PANEL, 230 VAC UNITS
1-5. REQUIRED ACCESSORIES
Operation of the BLANKETROL III unit requires the use of the blanket(s) designed to circulate
warm or cool distilled water, a connecting hose with quick-disconnect male and female couplings
and a 400 Series thermistor probe if any of the automatic modes are to be utilized. BLANKETROL
III System Equipment and accessories are listed in Figure (6-8.).
1-6. FUNCTIONAL DESCRIPTION OF THE BLANKETROL III SYSTEM
1-6.1. THEORY OF OPERATION
In the MANUAL CONTROL MODE, the operator sets the desired temperature of the circulating
water. The unit either heats or cools the water to reach the desired set point temperature. The
water circulates through the blanket and either raises or lowers the temperature of the patient. In
Manual 56201 Rev. A, ECN: M602-3259
12