Bair Paws 875 User manual

Warning: Electrical Shock Hazard. There are electrically live parts within the
warming unit when it is connected to a power source, even when the hand-
held temperature controller is in the OFF position.
Please forward to
Biomedical Engineering Department
Bair Paws®
Model 875
Warming Unit
Service Manual
Check the Bair Paws system website to ensure you have the most recent version of this document. www.bairpaws.com reorder #201332B

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Table of Contents
Introduction to the Bair Paws® Patient Adjustable Warming System................................................................. 1
Important Information about the Bair Paws Model 875 Warming Unit .......................................................... 2
Indications/Intended Use........................................................................................................................ 2
Contraindication..................................................................................................................................... 2
Warnings................................................................................................................................................. 2
Cautions.................................................................................................................................................. 3
Notices.................................................................................................................................................... 3
Proper Use and Maintenance .................................................................................................................. 3
Read Before Servicing Unit..................................................................................................................... 3
Safety Inspection..................................................................................................................................... 3
Preparing the Bair Paws Model 875 Warming Unit for Use ............................................................................. 4
Installing the Wall-mount Bracket.......................................................................................................... 4
Placing the Warming Unit on the Wall-mount Bracket .......................................................................... 5
Mounting the Warming Unit on an IV Pole........................................................................................... 6
Mounting the Warming Unit on a Bedrail.............................................................................................. 7
Mounting the Warming Unit with a Rail-mount to the Wall ................................................................. 8
Using the Hand-held Temperature Controller ........................................................................................ 9
Using the Holder for the Hand-held Temperature Controller................................................................. 9
Service Procedures ...........................................................................................................................................10
Calibrating the Operating Temperatures................................................................................................10
Testing the Over-temperature (OT) Circuit.......................................................................................... 13
Replacing the Filter................................................................................................................................14
Replacing the Temperature Controller and/or Hose...............................................................................15
Replacing the Power Cord......................................................................................................................18
Cleaning the Warming Unit ..................................................................................................................19
Technical Support and Customer Service ....................................................................................................... 20
U.S. Customer Service .......................................................................................................................... 20
When You Call for Technical Support .................................................................................................. 20
Repair and Exchange ............................................................................................................................ 20
Bair Paws Warming Unit Limited Warranty....................................................................................................21
Specifications.................................................................................................................................................. 22
Maintenance Log............................................................................................................................................ 24
Definition of Symbols..................................................................................................................................... 28

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Arizant Healthcare Inc.
Introduction to the Bair Paws®
Patient Adjustable Warming System
e Bair Paws patient adjustable warming system consists of the Model 875 forced-air
warming unit and disposable warming gowns. e Bair Paws Model 875 warming unit
can provide comfort warming and prewarming to patients in preoperative settings. In
postoperative settings the warming unit can provide comfort warming.
is manual includes service procedures and unit specifications for the Model 875 warming
unit. Please refer to the Instructions for Use for more information about the gowns.
Bair Paws Model 875 Warming Unit
e Bair Paws Model 875 warming unit has
the following key elements: a blower, a heating
element, and a hand-held temperature controller.
e warming unit delivers warmed air through
a hose that is connected to a port in a Bair Paws
gown. e patient can adjust the air temperature
and airflow using the temperature controller.
Bair Paws Warming Gowns e Bair Paws single-use warming gown has an
integral, channeled insert that delivers warm air
through small perforations to warm the patient.
Air channels and hose ports enable comfort and
prewarming with a Bair Paws 800 series warming
unit or clinical warming with a Bair Hugger®
500 or 700 series temperature management unit.
e gown also has Velcro® fastener strips on each
shoulder that provide easy access to the patient’s
arms and chest. e Bair Paws warming gowns
are latex-free.
VELCRO is a registered trademark of Velcro Industries B.V.
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Bair Paws® Model 875 Warming Unit Service Manual
2
Important Information about the
Bair Paws Model 875 Warming Unit
Indications/Intended Use
e Model 875 warming unit is indicated for patient warming. is warming unit has been
designed for use with the Bair Paws warming gowns in all preoperative and postoperative
settings.
Contraindication
Do not apply heat to lower extremities during aortic cross-clamping. ermal injury may
occur if heat is applied to ischemic limbs.
Warnings Do not warm patients with the warming unit’s hose alone. ermal injury
may result. Always connect the hose to a Bair Paws warming gown before
providing patient warming.
Do not continue warming if the red Over-temp indicator light illuminates or an
audible alarm sounds; thermal injury may result. Turn the warming unit OFF.
Do not use a forced-air warming device over transdermal medications; increased drug
delivery, patient death, or injury may occur.
Use only Bair Paws warming gowns with this warming unit. is warming unit
has been designed to operate safely with Bair Paws warming gowns; use with
other products may cause thermal injury. To the full extent permitted by law, the
manufacturer and/or importer declines all responsibility for thermal injury resulting
from the unit being used in conjunction with products other than Bair Paws warming
gowns.
Do not allow the warming unit’s hose to contact the patient’s skin during patient
warming. ermal injury may result.
Equipment not suitable for use in the presence of a flammable anaesthetic mixture
with air or with oxygen or nitrous oxide.
is warming unit is not intended for use in the operating room.
Position the temperature controller cord and the hose away from the patient’s neck or
shoulders to avoid entanglement and/or injury.
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Arizant Healthcare Inc.
Cautions
Do not initiate patient warming unless the warming unit is safely placed on a hard
surface or securely mounted. Otherwise, injury may result.
Electrical shock hazard. Do not disassemble the warming unit unless you are a qualified
service technician. ere are electrically live parts within the unit when it is connected
to a power source, even when the unit is in OFF or Standby mode.
Notices
e Bair Paws warming unit meets the international electronic interference
requirements. If radio frequency interference with monitoring equipment occurs,
connect the warming unit to a different power source.
Federal law (USA) restricts this device to sale by or on the order of a licensed healthcare
professional.
To reliably ground this warming unit, only connect to receptacles marked “Hospital
Only” or “Hospital Grade.”
Proper Use and Maintenance
Arizant Healthcare Inc. assumes no responsibility for the reliability, performance, or safety of
the unit if any of the following events occur:
Modifications or repairs are performed by unqualified personnel.
e warming unit is used in a manner other than that described in the Operator’s
Manual or Service Manual.
e warming unit is installed in an environment that does not meet the appropriate
electrical and grounding requirements.
Read Before Servicing Unit
All repair, calibration, and servicing of the Model 875 warming unit must be performed by
qualified, medical equipment service technicians who are familiar with good practice for
medical device repair. If the warming unit does not require the manufacturer’s attention,
Arizant Healthcare Inc. will ship replacement parts to your location. Perform all repairs and
maintenance in accordance with the instructions provided with the replacement parts.
Safety Inspection
Perform a safety inspection after making repairs to the Model 875 unit and before returning
the unit to service. A safety inspection should include calibrating the operating temperature
settings and testing the over-temperature detection function as described in the Service
Procedures section as well as testing for leakage current and continuity check on safety
ground.
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Bair Paws® Model 875 Warming Unit Service Manual
4
Preparing the Bair Paws Model
875 Warming Unit for Use
Before using the warming unit, make sure that it is safely placed on a flat, hard surface such
as a table, or securely mounted on a wall, IV pole, or bedrail.
C: Do not place the warming unit on a soft or uneven surface, such as a bed; this
may cause the air intake to become blocked, compromising the unit’s performance.
A wall-mount bracket is shipped with every warming unit; the brackets for mounting the
warming unit to an IV pole or a bedrail are available separately. Please contact your local
sales representative or call Arizant Healthcare® Customer Service at 1-800-733-7775 for more
information about ordering mounting brackets.
Installing the Wall-mount Bracket
Using the four wall-screw holes on the wall-mount bracket (see Figure 1) as a template,
mark the position for the four wall anchors on the desired wall. e use of a level is
recommended.
Install four suitable wall anchors at the marked positions. If using the provided self-
drilling wall anchors, use a Phillips screwdriver to screw the anchors into position. If
installing into industrial-grade plasterboard, predrilling may be required.
Hold the wall-mount bracket in position against the wall.
Screw the four provided screws through the wall-mount holes and into the wall anchors.
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2.
3.
4.
Figure 1. Front view of wall-mount bracket.
Wall screws

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Arizant Healthcare Inc.
Placing the Warming Unit on the Wall-mount Bracket
Snap the warming unit into position by sliding the clip on the back of the warming unit
into the groove of the wall-mount bracket. e assembly will click when the clip is fully
seated in the wall-mount bracket.
Lift the warming unit straight up to remove it from the wall-mount bracket.
N: It may be necessary to gently strike the case bottom in an upward fashion with
the palm of your hand to release the clip from the wall-mount bracket.
1.
2.
Figure 2. Inserting the warming unit into the groove of the wall-mount bracket.
Wall-mount
bracket
Case bottom

Bair Paws® Model 875 Warming Unit Service Manual
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Mounting the Warming Unit on an IV Pole
C: To prevent tipping, mount the Model 875 warming unit on an IV pole at a height
that ensures stability. We recommend mounting the warming unit no higher than 44 in.
(112 cm) from the floor on an IV pole with a minimum wheelbase radius of 14 in. (35.6 cm).
Failure to do so may result in IV pole tipping, leading to potential catheter site trauma and
other patient injuries.
Position the IV pole-mount at the desired height on the IV pole.
Turn the clamp knob on the IV pole-mount clockwise to tighten the clamp to the pole
(Figure 3).
Snap the warming unit into position by sliding the clip on the back of the warming
unit into the groove of the IV pole-mount. e assembly will click when the clip is fully
seated in the IV pole-mount.
1.
2.
3.
Figure 3. Installing a warming unit onto an IV pole.
Clamp knob
IV pole
IV pole-mount
Clip

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Arizant Healthcare Inc.
Mounting the Warming Unit on a Bedrail
Slide the clip on the back of the warming unit into the groove of the rail-mount bracket.
e assembly will click when the clip is fully seated in the rail-mount.
Hang the Model 875 warming unit on the bedrail by the hooks on the rail-mount.
Wrap the safety strap around the bedrail and connect the end to the fastener on
the strap. e safety strap will prevent the warming unit from falling if the unit is
accidentally dislodged from the bedrail.
1.
2.
3.
Figure 4. Mounting the warming unit on a bedrail using the rail-mount.
Safety strap
Bedrail
Rail-mount

Bair Paws® Model 875 Warming Unit Service Manual
8
Mounting the Warming Unit with a Rail-mount to the Wall
P: e rail-to-wall bracket is intended for use only with a Bair Paws 800 series
warming unit.
N: A minimum of two wall anchors must be used to secure the rail-to-wall bracket to the
wall. Additional wall anchors (up to a total of four) can be used for extra support.
Using the wall-screw holes on the rail-to-wall bracket (see Figure 5) as a template,
mark the position for the two wall anchors on the desired wall. e use of a level is
recommended.
Install two suitable wall anchors at the marked position. If using the provided self-
drilling wall anchors, use a Phillips screwdriver to screw the anchors into position. If
installing into industrial-grade plasterboard, predrilling may be required.
Hold the rail-to-wall bracket in position against the wall.
Screw the two provided screws through the bracket holes and into the wall anchors.
If the warming unit is not already connected to the rail-mount, slide the clip on the
back of the warming unit into the groove of the rail-mount. e assembly will click
when the clip is fully seated in the rail-mount.
Hook the warming unit with the attached rail-mount to the rail-to-wall bracket as
depicted in Figure 5.
Lift the warming unit straight up to remove it from the rail-to-wall bracket.
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Figure 5. Placing the warming unit with a rail-mount onto the rail-to-wall bracket.
Rail-to-wall
bracket
Rail-mount