Attaching The Hose; Removing The Hose; Testing The Alarm; Replacing The Air Filter - 3M Bair Hugger 675 Service Manual

3. Cart Installation: Place the unit in the center of the cart with the warming unit
feet aligned with the recesses in the cart.
(Note: The front rolling cart casters are lockable.)
4. Push down to snap the warming unit in place.
Attaching the hose
Service Frequency
As needed
Tools/Equipment
• Hose
Method
1. Align the triangle on top of the warming unit hose
connection with the notched groove on the hose end.
2. Push the hose in and turn clockwise approximately ¼ turn
until it snaps into place.
Removing the Hose
Service Frequency
As needed
Tools/Equipment
• None
Method
1. Hold the warming unit end of the hose and rotate
counter-clockwise approximately ¼ turn until
it stops.
2. Pull the hose straight out of the warming unit.
Testing the Alarm
Service Frequency
As needed
Tools/Equipment
• None
Method
1. Connect the warming unit to a grounded power source.
2. Verify the alarm sounds for approximately one beep and then silences.
Replacing the Air Filter
Service Frequency
Every 12 months or 500 hours of use.
The Change Filter indicator will display on the LCD screen after 500 hours
of use.
Tools/Equipment
• Replacement air filter (Use only 3M supplied air filter)
• #2 Phillips screwdriver
CAUTION: Do not attempt to clean the air filter as it may be contaminated from
use. Discard the filter in a manner consistent with institutional protocol.
English / 34-8720-2487-1
MODEL
675
System
Cart Installation
Method
1. Disconnect the warming unit from the
grounded power source.
2. If the warming unit is mounted to a rolling
cart remove the cart by gently pulling on
the front tab on the cart and lifting the
warming unit off the cart.
3. Turn the warming unit upside down.
4. Remove the 2 screws located in the
bottom of the warming unit.
5. Lift the filter cover off the warming unit.
6. Remove the air filter and discard it.
7. Place the new filter in the filter
compartment in either orientation.
8. Replace the filter cover on the
warming unit.
9. Replace the 2 screws in the filter cover.
10. If the warming unit was attached to a
rolling cart, place the warming unit in the
center of the cart and push down to snap
it in place.
11. Connect the warming unit to a properly
grounded power source.
12. Access the Diagnostic mode (see Diagnostic Mode section).
13. Navigate to the FILTER TIMER menu option and select it by pressing the
Ambient button.
14. Reset the filter timer by highlighting Yes and pressing the Ambient button.
15. Verify the filter time displayed at the top of the LCD screen displays 0.0.
16. Exit the Diagnostic Menu by pressing the Power button.
Calibrating the Operating Temperature
CAUTION
Perform all temperature testing of the warming unit with a 3M Model
22110 Temperature Test Unit.
3M assumes no responsibility for the reliability, safety, or performance of the
temperature management system if temperature tests or adjustments are made
in any manner other than those described here. Improper measurement or
adjustment of the warming unit's normal operating temperature could result in
patient exposure to temperatures outside of the indicated range and may lead to
patient injury.
Service Frequency
Every 12 months or 500 hours of use.
Tools/Equipment
• Model 22110 Temperature Test Unit
• Calibrated thermocouple monitor
Notes:
• The Model 22110 temperature test unit simulates the operating characteristic of
3M blankets and gowns when used with the warming unit.
• When using the Model 22110 temperature test unit, take temperature readings
using a calibrated thermocouple monitor that can accept a male, subminiature
connector and read a "K" style thermocouple (e.g., a Fluke 52 K/J Thermometer).
If the test unit's connector does not fit your thermocouple monitor, remove the
connector from the test unit and attach a connector that fits your monitor. Be
certain to observe polarity.
Method
1. Connect the warming unit to a grounded power source. The unit performs a
self-test and automatically proceeds to Standby mode.
2. Connect the temperature test unit to the end of the warming unit hose by fully
inserting the hose end up to the hose card stop flange.
3. Access the Diagnostic mode (see Diagnostic Mode section).
4. Navigate to the CALIBRATION menu option then press the Ambient button.
The warming unit is now in Calibration mode. In this mode, the warming unit
performs the following tasks:
• Blower turns ON.
• Heater elements turn ON.
• The LCD displays:
a. The text "DISPLAY" followed by the calibrated temperature of the air
exiting the warming unit.
b. The text "OFFSET" followed by the offset value. The offset value is the air
temperature difference between the warming unit hose connection (i.e.
air entering the hose) and the hose end (i.e. air exiting the hose).
5. Wait for the temperature shown on the warming unit's LCD display to stabilize
at 43.0°C ± 0.1°C (about 3-5 minutes).
6. Compare the temperature shown on the LCD display and the temperature of
the thermocouple (test kit) monitor.
• If the temperatures match, press the Ambient button to save and return
to the Diagnostic Mode main screen.
Filter
Filter Cover
Screws
9