Carbolite EZS Series - Manual (Page 9)

E range
MF65-1.01 9 9
Using the EVA/EVC/EVT/EVZ horizontally
The EVA and EVC models can be used either
with the stand vertically as shown in Figure 2-9,
page 8 or horizontally as shown in Figure 2-12.
To use horizontally simply tip the stand over into
the horizontal position making sure that the
flexible conduits are not trapped beneath the
frame. This may take 2 people to do on the larger
models.
The position of the furnace on the stand can be
adjusted if necessary.
Note: To prevent injury to the operator and
damage to the furnace this must only be done
when the furnace is switched off and cold.
Fitting the standard work tube in an
EVA/EVC furnace. (Tools required: 4mm Hex key.)
Note that the EVT/EVZ models can only be used with the extended length work tube. This is to
allow the work tube to be held in place when the furnace is opened in the vertical position.
The diameter of the work tube is a customer order option and therefore varies between tube
furnaces. The fitting of the work tube is as follows with reference to Figure 2-13. Note that
standard work tubes are also referred to as tubes suitable for working in air; they are 150mm
longer than the heated length of the furnace (see Table 9-1 page 24). Read section 5.2 page 19
before fitting the work tube.

Remove the top work tube end guard (item 8) then remove the work tube adaptor fixing
bracket (4) that holds the work tube end stop (7) and the work tube adaptor (3) in place.
Note
(1)
it might be easier to do this with the furnace in the horizontal position as shown in
Figure 2-12 page 9.
Note
(2)
if a different work tube with a different outer diameter is being fitted it will be
necessary to fit new correctly sized work tube adaptors (3) in which case both end guards
and work tube adaptor fixing brackets (4) will need removing.

Slide the work tube into the furnace through the work tube adaptor (3) until it reaches the
opposite work tube bottom stop (7). Note that the work tube might be a tight fit when it is
new and may need to be twisted backwards and forwards slightly as it slides in. For long
work tubes it may be necessary to use a long
wooden pole such as a broom handle to support
and line up the work tube as it is pushed through.
It may also take 2 people to perform this
operation.

Reassemble the work tube end stop (7), work tube
adaptor bracket (4) and the tube end guard (8).
Index to numbered items in Figure 2-13.
1. EHA/EHC tube furnace
2. Work tube adaptor (size dependent on work tube
diameter)
3. Work tube (size diameter customer option)
4. Work tube adaptor fixing bracket
5. Fixing screws M6 x15
6. Washer M6
7. Work tube end stop (dependent on work tube
diameter)
8. Tube furnace end guard
Figure 2-12. EVA/EVC positioned horizontally on the stand
Figure 2-13. Exploded view showing how to fit
the work tube in the EVA