Part 3 SES 2000 AUTOCLAVE
Page 20 of 43 ST-SM8l
PART 3 MAINTENANCE
PARTS REPLACEMENT AND ADJUSTMENT
WARNING
Switch-off and disconnect mains power supply
before removing autoclave cover, or doing
maintenance procedures.
Check that chamber is at atmospheric pressure
before opening the door. When the door is
opened beware of possible very hot water or
steam escaping from the chamber.
IMPORTANT NOTE: On the latest units the copper
pipes and related fittings have been replaced by
silicone tubing and modified fittings. Please refer to
the parts list for details during any part replacement.
Removing Cover (Fig. 2, item 19)
3.3 To remove the cover:
CAUTION
An earth lead is connected between the terminal
block and the earth stud inside the rear of the cover.
Disconnect the lead before removing the cover
completely.
a Unscrew and remove the four cover screws (two
on each side) from the casing lower edge.
b Remove reservoir access cover.
c With unit facing towards you, remove the cover -
lifting it from the rear of the unit first.
Refitting Cover (Fig. 2, item 19)
3.4 To refit the cover:
a Re-connect the earth lead between the terminal
block and the earth stud inside the rear panel of
the cover.
b Carefully locate the front upper flange of the cover
in the small gap between the stainless steel
dividing plate and the front panel of the unit, then
lower the cover down in position.
c Refit the four cover screws and the reservoir
access cover.
Thermal Fuse (Fig. 4, item 7)
3.5 Detach the two female push-on connectors.
Unhook one end of mounting spring and remove thermal
fuse assembly. Fit replacement in reverse order and
ensure that fuse body is located at the bottom of the
chamber about half way between the front and the
back.
Transformer (Fig. 4, item 11)
3.6 Detach the transformer connections, noting the
position of each one. Remove the transformer securing
nuts and bolts. The replacement transformer should be
an identical unit. To install replacement transformer,
reverse the removal procedure.
Controller Board (Fig. 4, item 12)
3.7 Note the orientation and position of the plugs
connecting the controller board to the unit, and then
disconnect them. Remove the bolt securing the controller
board voltage regulator to the dividing panel. Remove
the four bolts securing the controller board to the
dividing panel, and remove the control board, complete
with the regulator. To fit replacement, reverse the
removal procedure. When mounting the voltage
regulator, coat the mating surface with a thin layer of
zinc oxide-based heat transfer compound and ensure
that the bolt is well tightened. When tightening the
controller board securing nuts, ensure that control
switches do not foul the holes in the front panel through
which they protrude.
Note
Avoid overtightening the nylon nuts securing the
controller
When a new controller is fitted, it will be necessary
to recalibrate it to suit the temperature sensor fitted
in the machine (see Routine Calibration Procedure).
Pressure Door Lock (Fig. 3, item 7)
3.8 To remove the pressure door lock for adjustment
or replacement proceed as follows: From front of
pressure door lock remove screw-slotted locking bolt.
Detach plumbing connection from rear of lock body,
then slacken the two hexagon headed screws in the
lock housing to release lock body. Clean old locking
compound fragments out of threaded hole in piston, if
re-fitting original lock unit. To fit original or replacement
pressure lock unit, proceed as follows:
a Apply a drop of ‘Loctite 542’ thread lock to female
thread only in hexagon shaped piston, then fit lock
body into lock housing on chamber neck ring and
secure it with the two hexagon headed screws
using thread lock (part number 306033).
b Attach and secure plumbing connection.
c Apply a smear of silicone compound (MS4) to
shaft only of locking bolt, avoiding the thread.
d Insert locking bolt into front of lock body and screw
it into piston thread until bolt head stands
1/2mm clear of cabinet front plate. Ensure that bolt
is free to move in and out easily.
e Ensure locking bolt is fully engaged with the door
at its maximum extension.
Note
Do not attempt to repair a leaking or otherwise
unserviceable door lock.
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