4. Remove the ten screws securing the filter
inlet plate.
5. Remove the screw and lock washer 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
1
/
8
" hex
wrench through hole in one blade of blower
wheel.
8. Remove the two #6 screws holding the
heater to the motor bracket.
9. Disconnect the short wire from the heater to
the motor.
10. Remove the red heater wire from terminal
block location TB1-3 (see figure 11).
Remove wire ties.
11. Remove the heater.
12. Install the replacement heater.
13. Reroute the red wire through the 4-hole
grommet.
14. Reconnect both wires. Refer to TB1
designators in the schematic (figure 13) and
terminal block wiring designators in figure
11. Install wire ties.
15. Reinstall the blower wheel, making sure
there is 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.)
16. Place the filter inlet plate back on top of the
scroll. Secure the ten screws.
17. Replace the terminal block. Reconnect the
ground wire to the backing plate; make sure
the lock washer is reinstalled.
18. Replace the HEPA filter. Secure it with the
filter retainer and nut.
19. Perform the
FUNCTIONAL CHECK AND
SAFETY INSPECTION
(section 7, pp. 8-15).
10.0 Repair Procedures
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.
To identify replacement parts, refer to figures
9-11 (pp. 24-27). To order replacement parts,
contact Gaymar's Export Department:
Telephone: (716) 662-8636
Fax:
(716) 662-0730
10.1 Replacing the Patient Limit
Thermostat(s) (S2 & S3)
To replace either thermostat (item 17, fig. 11):
1. Unplug the Power Unit.
2. Remove the six screws securing the
enclosure. Open the enclosure.
3. Carefully unplug the terminals from the
thermostat.
4. Remove the two #4 nuts from the
thermostat.
5. Replace the thermostat. Reinstall the nuts.
6. Carefully replace the terminals.
7. Perform the
FUNCTIONAL CHECK AND
SAFETY INSPECTION
(section 7, pp. 8-15).
10.2 Replacing the Heater
To replace the heater (item 3, fig. 9):
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 HEPA filter.
Section 10 - Repair Procedures
WARNING
21
