Section 5 - Controls and Indicators
Section 6 - Preventive Maintenance
6.0 Preventive Maintenance
6.1 HEPA Filter
Dirt that has accumulated on the internal HEPA
air filter will reduce the efficiency of the blower
and heater. Under normal use, replace the HEPA
filter every 1000 operating hours or 12 months,
whichever occurs first. Replace the filter
only
with
the Gaymar P/N listed (see parts list, fig. 9, p.24).
Use only Gaymar replacement parts as
identified in the parts lists (pp. 24-27).
Use of substitute parts could result in
power unit malfunction or patient injury.
Refer to
Functional Check, 7.6 Filter Switch Test &
Filter Replacement
(p. 14) for instructions.
6.2 Blower
The blower motor and fan do not require
lubrication.
6.3 Enclosure Exterior
Clean the control panel and Power Unit exterior
with a soft cloth lightly dampened with a
nonstaining hospital disinfectant.
6.4 Quilts
Quilts are not sterile.
Quilts are intended for single patient use only.
Quilts should be discarded after use.
Small rips or tears in quilt material may be
temporarily fixed with adhesive tape.
6.5 Hose
Clean the hose with a soft cloth lightly dampened
with a nonstaining hospital disinfectant. Place the
connector hose under the bed rail hooks when not
in use.
6.6 Air Vents
Clean accumulated dirt from the air vents with a
vacuum cleaner.
5.0 Controls and Indicators
5.1 Power
An on/off circuit breaker is located on the front
of the unit in the bottom left corner. It controls
power to the entire unit. When switched to the
ON
position, a power indicator in the switch will light.
5.2 Control Panel
An
operator control panel
(fig. 4, p. 6) is
mounted at the top of the Power Unit:
•
[Power Up]
When the power unit is turned on,
the system defaults to the
MED (100°F, 38°C)
temperature setting. A green light directly
above the selector switch will glow indicating
the selected temperature range.
•
[Temperature Settings]
Temperature settings
are selected by pressing the appropriate push-
button --
MIN (fan only), LOW (90°F, 32°C),
MED (100°F, 38°C), or HIGH (110°F, 43°C).
•
[Power Interruption]
If electrical power
is interrupted momentarily, the existing
temperature setting will remain. If electrical
power remains off, the TC3249 will default to
the
MED (100°F, 38°C)
setting when power is
restored.
A
REMOVE FROM USE
indicator will light:
• if a patient safety thermostat or heater
thermostat has tripped.
• if the HEPA filter has been installed incorrectly
or is missing.
The heating element and blower will automatically
turn off when these conditions occur.
7
W ARNING
10.3 Replacing the Thermistor Assembly
(RT1)
To replace the thermistor assembly (item 4, figs.
9-10):
1. Unplug the Power Unit.
2. Remove the six screws securing the
enclosure. Open the enclosure.
3. Unplug the thermistor assembly from the PC
board.
4. Cut the cable ties holding the thermistor wires
to the wire harness and enclosure standoff.
Be careful not to cut the insulation on the
standoff.
5. Remove the filter retainer and nut. Remove the
filter.
6. Remove the ten screws securing the filter inlet
plate.
7. Remove the two screws securing the terminal
block. Remove the screw and lock washer
securing the ground wire to the backing plate.
8. Depending on the method of mounting, either
use wire cutters to remove the spring clip, or
loosen the speed nut securing the thermistor
assembly to the filter inlet plate.
9. Replacement thermistor assemblies may be
slightly larger than the original. If necessary,
open hole slightly, to
1
/
4
".
10. Replace the thermistor assembly. Secure
it with the new speed nut supplied with the
thermistor assembly.
11. Place filter inlet plate back on top of the scroll.
Secure the ten screws.
12. Replace the terminal block. Reconnect the
ground wire to the backing plate. Make sure
the lock washer is reinstalled.
13. Plug the thermistor assembly into the control
board. Use the cable ties supplied with the
thermistor assembly to hold the thermistor
wires to the PC board wire harness and
enclosure standoff.
14. Replace the HEPA filter. Secure it with the filter
retainer and nut.
15. Perform the
FUNCTIONAL CHECK AND SAFETY
INSPECTION
(section 7, pp. 8-15).
10.4 Replacing the motor
To replace the motor:
1. Unplug the Power Unit.
2. Remove the six screws securing the
enclosure. Open the enclosure.
3. Remove the filter retainer and nut. Remove
the filter.
4. Remove the ten screws securing the filter
inlet plate.
5. Remove the screw securing the ground wire
to the backing plate. Remove the two screws
securing the terminal block.
6. Carefully lift the filter inlet plate, exposing the
blower wheel.
7. Remove the blower wheel using a
1
/
8
" hex
wrench through hole in one blade of blower
wheel.
8. Cut wire tie holding wiring harness (fig. 11).
9. Unplug terminals from the motor.
10. Remove the two #8 screws and two #8
nuts from the bottom of motor.
11. Loosen the two #8 screws on top of motor.
Slide filter support bracket off. Loosen
corresponding screws on new motor and
replace filter support bracket. Tighten
screws.
12. Remove and replace the motor.
13. Secure with mounting hardware.
14. Reconnect the terminals.
15. Secure wire harness to motor with a wire tie.
16. Reinstall the blower wheel, making sure
there is 0.10" (2.5 mm) clearance between
the wheel and the blower inlet ring (see fig.
9). NOTE: the hex screw must be aligned
with the flat on the motor shaft.
17. Place the filter inlet plate back on top of the
scroll. Secure the ten screws.
18. Replace the terminal block. Reconnect the
ground wire to the backing plate; make sure
the lock washer is installed.
19. Replace the HEPA filter. Secure it with the
filter retainer and nut.
Section 10 - Repair Procedures (cont’d)
22
