Bair Paws 850 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 850
Warming Unit
Service
Manual

Table of Contents
Introduction to the Bair Paws® Patient Adjustable Warming System ....................................1
Important Information about the Bair Paws Model 850 Warming Unit ..............................2
Indications/Intended Use ........................................................................................2
Contraindication .....................................................................................................2
Warnings ................................................................................................................2
Precautions..............................................................................................................3
Proper Use and Maintenance ..................................................................................3
Read Before Servicing Unit .....................................................................................3
Safety Inspection.....................................................................................................3
Preparing the Bair Paws Model 850 Warming Unit for Use.................................................4
Installing the Wall-mount Bracket ..........................................................................4
Mounting the Warming Unit to the Wall-mount ...................................................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 Temperature Controller Holder...............................................................9
Service Procedures............................................................................................................. 10
Calibrating the Operating Temperatures ............................................................... 10
Testing the Over-Temperature (OT) Circuit.......................................................... 11
Replacing the Filter ...............................................................................................12
Replacing the Temperature Controller and/or Hose............................................... 13
Replacing the Power Cord..................................................................................... 14
Reassembling the Warming Unit........................................................................... 15
Cleaning the Warming Unit.................................................................................. 16
Technical Support and Customer Service .......................................................................... 17
U. S. Customer Service.......................................................................................... 17
When You Call for Technical Support................................................................... 17
Repair and Exchange............................................................................................. 17
Bair Paws Warming Unit Limited Warranty ..................................................................... 18
Specifications .................................................................................................................... 19
Maintenance Log .............................................................................................................. 21
Definition of Symbols .......................................................................................................23

Arizant Healthcare Inc. 1
Introduction to the Bair Paws®
Patient Adjustable Warming System
The Bair Paws patient adjustable warming system consists of the Model 850 forced-air warming unit
and disposable warming gowns. The Bair Paws Model 850 and warming gown can provide comfort
warming and prewarming to patients in preoperative settings. In postoperative settings the Model
850 can provide comfort warming.
This manual includes service procedures and unit specifications for the Model 850 warming
unit. Please refer to the Instructions for Use included with the Bair Paws warming gown for more
information about the gown.
Bair Paws Model 850 Warming Unit
e Bair Paws Model 850 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 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-channel inserts and hose ports enable comfort
warming with a Bair Paws 800 series warming unit
or clinical warming with a Bair Hugger® 500 or 700
series temperature management unit.
®
®

Bair Paws®Model 850 Warming Unit Service Manual
2
Important Information about the
Bair Paws Model 850 Warming Unit
Indications/Intended Use
e Model 850 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 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 the Model 850 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.
e Model 850 warming unit is not intended for use in the operating room.•
Do not allow the warming unit’s hose to contact the patient’s skin during patient warming.•
ermal injury may result.
Position the temperature controller cord and the hose away from the patient’s neck or shoulders•
to avoid entanglement and/or injury.
Equipment not suitable for use in the presence of a flammable anaesthetic mixture with air or•
with oxygen or nitrous oxide.

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Precautions
Do not initiate patient warming unless the Model 850 warming unit is safely placed on a hard•
surface or securely mounted. Otherwise, injury may result.
e Model 850 warming unit meets the international electronic interference requirements of EN•
60601-1-2 and EN 55011. However, if radio frequency interference with monitoring equipment
occurs, connect the warming unit to a different power source.
Monitor the patient’s temperature and cutaneous response every 10-20 minutes or according to•
institutional protocol and monitor the patient’s vital signs regularly.
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 850 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 850 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.

Bair Paws®Model 850 Warming Unit Service Manual
4
Preparing the Bair Paws Model 850 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, or the air intake
may become blocked.
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 the1.
position for the four wall anchors on the desired wall. The use of a level is recommended.
Install four suitable wall anchors at the marked positions. If using the provided self-drilling wall2.
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.3.
Screw the four provided screws through the wall-mount holes and into the wall anchors.4.
Wall screws
Setscrews
Figure 1. Front view of wall-mount bracket.

Arizant Healthcare Inc. 5
Mounting the Warming Unit to the Wall-mount
Slide the V-shaped bracket on the back of the warming unit into the groove of the1.
wall-mount bracket.
Tighten the 2 setscrews located on either side of the wall-mount bracket using a three-inch-long2.
(or longer) small Phillips screwdriver to lock the unit in place (see Figure 2).
Setscrew
Figure 2. Side view of warming unit in the wall-mount bracket.

Bair Paws®Model 850 Warming Unit Service Manual
6
Mounting the Warming Unit on an IV Pole
Ca u t i o n :To prevent tipping, mount the Model 850 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.
no t e :e wall-mount bracket is shipped attached to the IV pole mount.
Position the IV pole-mount at the desired height on the IV pole.1.
Turn the clamp knob on the IV pole-mount clockwise to tighten the clamp to the pole2.
(Figure 3).
Slide the V-shaped bracket on the back of the warming unit into the groove3.
of the IV pole-mount.
Tighten setscrews as shown in Figure 2.4.
IV pole-mount
Clamp knob
IV pole
Figure 3. Installing a warming unit onto an IV pole.

Arizant Healthcare Inc. 7
Mounting the Warming Unit on a Bedrail
N: e wall-mount bracket is shipped attached to the rail-mount.
Slide the V-shaped bracket on the back of the warming unit into the groove of the1.
rail-mount bracket.
Tighten the setscrews (see Figure 2).2.
Hang the rail-mount on the bedrail.3.
Wrap the safety strap around the bedrail and connect the end to the fastener on the strap. The4.
safety strap will prevent the warming unit from falling if the unit is accidentally dislodged from
the bedrail.
Safety strap
Bedrail
Figure 4. Mounting warming unit on a bedrail using the rail-mount.
Rail-mount

Bair Paws®Model 850 Warming Unit Service Manual
8
Mounting the Warming Unit with a Rail-mount to the Wall
Using the wall-screw holes on the rail-to-wall bracket (see Figure 5) as a template, mark the1.
position for the two wall anchors on the desired wall. The use of a level is recommended.
Install two suitable wall anchors at the marked positions. If using the provided self-drilling wall2.
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.3.
Screw the two provided screws through the bracket holes and into the wall anchors.4.
Hook the warming unit with the attached rail-mount to the rail-to-wall bracket as depicted in5.
Figure 5.
Pr e C a u t i o n : For use only with the Model 850 warming unit.
no t e :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.
Rail-to-wall
bracket
Figure 5. Placing the warming unit with a rail-mount onto the rail-to-wall bracket.