2009 by ELTRA GmbH Germany – July 2009 – Service Manual Thermostep
Page 60
It is important that the lower furnace is correctly aligned before installing a new upper
furnace. Check that the lower furnace is at the correct height and make adjustments as
required – see lower furnace procedure.
3.17 Install of upper heating element
Unplug instrument from electrical supply and disconnect the compressed air supply.
a.)
Place the upper furnace onto the rim of the lower furnace.
b.)
Check that contact is made with the rear position supports and if necessary adjust so
that the upright part of the rear supports touch the side of the furnace.
c.)
Slide in the two front positioning supports and tighten the 2 x 2.5mm allen screws in
each.
d.)
Carefully place the s/s strap over the furnace so that the strap sits just under the
ceramic tubes that carry the furnace wires. The strap should be positioned evenly
around the furnace approximately 20mm down from the top edge with the clamp
mechanism adjacent to the RHS front positioning support.
e.)
Tighten the 5mm allen screw in the clamp until the furnace is held firmly.
Do not
over tighten
.
f.)
Check the alignment with the lower furnace by slowly raising and lowering the lid by
hand. There should not be any interference.
g.)
Reverse the above procedure from section 12 to complete the installation.
