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Bair Hugger*
Model 505 Warming Unit
Service 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 switches are in the OFF or STANDBY position.
Please forward to Biomedical Engineering Department
Bair Hugger Modell 505 Temperaturmanagementgerät Service Gebrauchsanleitung
Vorsicht: Gefährliche elektrische Spannung. In einem an das Stromnetz angeschlossenen Wärmegerät stehen bestimmte elektrische Komponenten auch dann unter Strom, wenn der Schalter auf AUS oder BEREITSCHAFTSMODUS geschaltet ist.
Bitte an die Abteilung für biomedizinische Technik weiterleiten
Unité de gestion de température Bair Hugger modèle 505 Service Manuel
Mise en garde : Risque d’électrocution. Certaines pièces sont électriquement chargées dans les appareils de réchauffement, lorsque ceux-ci sont connectés à une source d’alimentation et ce, même si l’appareil est en position OFF (arrêt) ou STANDBY (attente).
A transmettre au Service d’ingénierie biomédicale
To t a l Te m p e r a t u r e M a n a g e m e n t S y s t e m
Bair Hugger*
Model 505 Warming Unit
Service Manual 
English 1
Deutsch 29
Français 61
Table of Contents
Introduction 1
Description of the Total Temperature Management* System 1 Indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Contraindications 1 Warnings 2 Cautions 3 Notices 3 Read Before Servicing Equipment 4
Service Procedures 5
Cabinet Cleaning 5 Hose Replacement 5 Power Fuse Replacement 6 Control Board Fuse Replacement 7 Air Filter Replacement 9 Over Heat Alarm Testing 10 Over Heat Alarm Thermostat Adjustment 13 Normal Operating Temperature Testing 15 Normal Operating Temperature Adjustment 17
Specifications 19 Key to Figure 10 20
Technical Support and Customer Service 22
When You Call for Technical Support 22 In-Warranty Repair and Exchange USA 22 Returning Units for Service 23
Troubleshooting 24 Maintenance Log 25 Symbol Definitions 28
Bair Hugger Model 505 Service Manual
Introduction
Description of the Total Temperature Management* System
The Bair Hugger brand Total Temperature Management system consists of a Bair Hugger forced-air warming unit and disposable components, including Bair Hugger forced-air blankets and the 241* blood/fluid warming set, and Bair Paws* patient warming gowns. The system and disposables are intended for use in clinical settings including the operating room. The warming unit draws ambient air through a filter and warms the air to the specified temperature. It then delivers the warmed air through a hose to the blanket or gown.
This manual describes how to service the Model 505 warming unit, and includes maintenance instructions and specifications. For information about using Bair Hugger blankets, the 241 blood/fluid warming set, or Bair Paws gowns with Bair Hugger units, refer to the “Instructions for Use” included with each of these disposable components.
Indications
The Bair Hugger Temperature Management system is intended to prevent and treat hypothermia. In addition, the temperature management system can be used to provide patient thermal comfort when conditions exist that may cause patients to become too warm or too cold. The temperature management system can be used with adult and pediatric patients.
Contraindications
Do not apply heat to lower extremities during aortic cross-clamping. Thermal injury may occur if heat is applied to ischemic limbs.
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Bair Hugger Model 505 Service Manual
Warnings
1.Do not leave patients with poor perfusion unmonitored during prolonged warming therapy sessions. Thermal injury may result.
2.The Bair Hugger temperature management unit has been designed to operate safely ONLY with Arizant Healthcare* disposable components. 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 non-Arizant Healthcare products.)
3.Do not warm patients with the temperature management unit hose alone. Thermal injury may result. Always connect
the hose to a Bair Hugger blanket or Bair Paws gown before providing therapy.
4.Do not place the non-perforated side of the blanket on the patient. Thermal injury may result. Always place the
perforated side (that is, with small holes) towards the patient.
5.Do not continue temperature management therapy if the over-temp indicator light illuminates and the alarm sounds. Thermal injury may result. Unplug the unit, and contact a qualified service technician.
6.Do not continue 241 blood/fluid warming therapy if the over-temp indicator light illuminates and the alarm sounds. Immediately stop fluid flow, and discard the blood/fluid warming set. Unplug the temperature management unit, and contact a qualified service technician.
7.Do not use a forced-air warming device over transdermal medication. Increased drug delivery and patient injury or death may occur.
8.Do not allow the patient to lie on the warming unit hose or allow the hose to directly contact the patient’s skin during patient warming; thermal injury may result.
9.Equipment not suitable for use in the presence of a flammable anesthetic mixture with air or with oxygen or nitrous oxide.
10.Resuable blankets made from woven fabric, or blankets without discrete, visible holes, can cause the safety system of this unit to fail, which may result in serious thermal injury. This warming unit has been designed to operate safety ONLY with Bair Hugger blankets and Bair Paws gowns.
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Bair Hugger Model 505 Service Manual
Cautions
1.Except for specific blanket models, Bair Hugger blankets are not sterile and are all intended for single patient use ONLY. Placing a sheet between the Bair Hugger blanket and the patient does not prevent contamination of this product.
2.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. Adjust air temperature or discontinue therapy when the therapeutic goal is reached or if vital sign instability occurs. Notify physician of vital sign instability immediately.
3.Do not leave pediatric patients unattended during therapy.
4.Do not initiate temperature management therapy unless the temperature management unit is safely placed on a hard surface or securely mounted. Otherwise, injury may result.
5.To prevent tipping, clamp the Temperature Management Unit to an IV pole at a height that provides stability. We recommend clamping the unit no higher than 44”
(112cm) on an IV pole with a minimum 14” (35cm) radius wheelbase. Failure to do so may result in IV pole tipping, catheter site trauma, and patient injury.
6.Electrical shock hazard. Do not disassemble the temperature management unit unless you are a qualified service technician. There are electrically live parts with in the unit when it is connected to a power source, even when the unit is in Standby mode.
Notices
1.The Bair Hugger temperature management unit meets medical electronic interference requirements. If radio frequency interference with other equipment should occur, connect the unit to a different power source.
2.Federal law (USA) restricts this device to sale by or on the order of a licensed healthcare professional.
3.To reliably ground this Bair Hugger warming unit, only connect to receptacles marked “Hospital Only” or “Hospital Grade”.
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Bair Hugger Model 505 Service Manual
Read Before Servicing Equipment
The repair, calibration, and servicing of the warming unit requires the skill of a qualified medical equipment service technician who is familiar with good practice for medical device repair. If service is designated as not requiring manufacturer’s attention, the technical information is provided in this service manual or will be provided, on request, by Arizant Healthcare Inc.
Refer to Service Manual
Perform all repairs and maintenance in accordance with the instructions in this service manual.
Safety Inspection
Perform a safety inspection after making repairs to the
Bair Hugger warming unit and before returning the warming unit to service. A safety inspection should include a test of the operating temperatures (described in this service manual), the Over Heat alarm system, as well as a leakage current test.
Proper Use and Maintenance
Arizant Healthcare Inc. assumes no responsibility for the reliability, performance, or safety of the equipment if:
•Modifications or repairs are performed by non-authorized personnel.
•The equipment is used in a manner other than that described in the Operator’s or Service Manuals.
•The equipment is installed in an environment that does not meet the relevant grounding requirements.
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Bair Hugger Model 505 Service Manual
Service Procedures
Cabinet Cleaning
Tools/Equipment
Soft cloth, lightly dampened with water and mild detergent.
Method
1.Disconnect the warming unit from the power source.
2.Wipe the exterior of the warming unit clean.
CAUTION: Do not use a dripping wet cloth when cleaning the warming unit. Moisture may seep into the electrical contacts and damage the components. Also, do not use alcohol or other
solvents to clean the cabinet. Solvents may damage the labels and other plastic parts.
Hose Replacement
Method
1.Press the tab on the blower outlet to release the existing hose.
2.Attach the replacement hose by inserting the flange end at a 45° angle in the grooved blower outlet, then snap the hose into place. (See Figure 1.)
Figure 1. Attaching the
Replacement Hose
Press this |
Insert flange into |
tab to |
groove and snap into |
release |
place |
hose |
|
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Bair Hugger Model 505 Service Manual
Power Fuse Replacement
The power fuses are located in the power entry module. A spare fuse is located in the fuse carrier (see Figure 2).
Tools/Equipment
Phillips-head screwdriver
Small slotted screwdriver
Method
1.Disconnect the warming unit from the power source.
2.Remove the 2 Phillips-head screws that secure the cord retainer. Remove the power cord.
3.Locate the fuse carrier in the center of the power entry module (see Figure 2).
4.Use the small screwdriver to remove the fuse carrier from the power entry module.
5.Remove the blown fuse(s) from the fuse carrier.
6.Place the new fuse(s) (as marked) into the fuse carrier.
CAUTION: Replace only with the fuse capacity and type that is indicated on the adjacent label.
7.Replace the fuse carrier into the power entry module.
8.Reattach the power cord.
9.Replace the 2 Phillips-head screws to reattach the cord retainer.
10.Reconnect the warming unit to the power source.
11.Record the maintenance action taken and the hours of operation (read from the hour meter) in the Maintenance Log section.
Detail
Figure 2. Location
of Power Fuse Fuse
carrier
Power entry module (see detail)
Spare fuse
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Bair Hugger Model 505 Service Manual
Control Board Fuse Replacement
Control board fuses are located on the control board. (See Figure 3.) The internal fuses on the Model 505 are for control board functions only.
The power fuses are located in the power entry module. Instructions for power fuse replacement can be found in the
Power Fuse Replacement section.
Tools/Equipment
Phillips-head screwdriver
Method
1.Disconnect the warming unit from the power source.
2.Turn the Model 505 unit over, so that the bottom panel is facing up.
3.Using the Phillips-head screwdriver, remove the screw from each of the 2 front feet (bumpers) and remove the feet.
4.Remove the Phillips-head screw from the center of the upper rear panel.
5.Remove the 2 Phillips-head screws located under the bed hooks on the upper rear panel. Turn the unit right side up.
6.Lift the top cover and unhook the front of the top cover from the retainer bracket inside. The control panel is located on the underside of the top cover. See Figure 3 for location of the fuse.
7.Remove the fuse and replace with the new one.
CAUTION: Replace only with the fuse capacity and type that is indicated on the adjacent label.
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Bair Hugger Model 505 Service Manual
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