Part 3 SES 2000 Vac (LS3) AUTOCLAVE
Page 28 of 53 ST-SM45g
PART 3 MAINTENANCE
EMC Board (Fig. 2.4, item 5)
27 See 'Appendix C' before proceeding. Remove the
EMC board as follows:
a Remove cable-tie and lift cover, remove two screws
and washers from the PCB and the choke and then
remove the EMC board with the choke.
b Refitting is the reverse of the removal procedure.
However, ensure cover is installed under EMC
board before the board is refitted.
Printer (Fig. 2.2 item 21)
28 Remove the printer as follows:
a Disconnect all electrical connections noting their
position and orientation for correct reconnection.
b Remove two screws from the printer securing
bracket.
c Withdraw the printer through the front panel.
d
Refit the printer using the reverse removal procedure.
Safety Valve (Fig.2.3, item 16)
29 To remove and replace the Safety Valve proceed as
follows:
a Remove safety valve from cross assembly and
clean female thread of cross piece.
b Apply PTFE tape to thread of new valve and refit to
cross assembly.
Band Heater Temperature Sensor (Fig.2.4, item 15)
30 To remove and replace the Band Heater Temperature
Sensor proceed as follows:
a Remove sensor cover from band heater loosen nut
on sensor retaining clamp and remove sensor.
b Release sensor wire from all cable clamps and the
Ferrite clamp by releasing its tie and clips.
c Unplug from the SSR board.
d Refit by reversing the above and coat the sensor
with a light smear of zinc-oxide based heat transfer
compound. Ensure that the sensor is in tight contact
with the band heater by adjusting the clamp if
required.
Note: When a new temperature sensor is fitted, the band
heater must be re-calibrated (see para.57 onwards).
Power Switch (Fig.2.4, item 9)
31 To remove and replace power switch proceed as
follows:
a Remove 4 spade connectors from the switch noting
the terminals each was connected to.
b Release switch from the front panel by pressing the
retaining lugs in on each side and withdraw.
c Replace new switch by reversing the above ensuring
correct orientation (‘0’ left ‘I’ right).
Float Switch (Fig.2.3, item 11)
32 To remove and replace the float switch proceed as
follows:
a Drain reservoir and disconnect the two in-line bullet
connectors.
b Remove float switch retaining nut and remove switch.
c Refit by reversing the above ensuring that the
sealing washer of the switch is correctly positioned
(between the switch housing and the reservoir wall)
and the thin section of the float is positioned
uppermost.
Cooling Ducts
33 There is a cooling duct fitted the Standard autoclave
(a sensor cover). This is fitted as follows:
a The sensor cover is fitted by undoing the rear
chamber clamp band and sliding the tag of the
sensor cover under the clamp band from the rear of
the autoclave. It is positioned on the dividing panel
side of the chamber with its top edge 1cm short of
the top test port. Retighten clamp band after
positioning.
Band heater (Fig.2.4, item 18)
34 To remove and refit the band heater proceed as
follows:
a Remove band heater temperature sensor and
retaining clamp para.30.
b Remove heater connections and the spade
connections to the overheat thermostat.
c Release heater clamp bolts and carefully slide
heater off the chamber vertically by allowing the
heater to open up into a ‘U’ shape.
d Refit new band heater by reversing the above, use
threadlock 670650 on screws and refer to para.30 for
details on how to refit the temperature sensor.
Note: When a new band heater is fitted it must be
recalibrated see calibration para.57 onwards).
Chamber Water Level Sensor
35 To remove and refit the chamber water level sensor
(see Figure on page 46 item 5) proceed as follows:
a Remove nut and washer retaining the wire terminal
and the nut holding the sensor in place at the rear of
the chamber.
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