Carbolite EZS Series - Manual (Page 2)

E range
2 MF65-1.01 MF65-1.00
1 INTRODUCTION
1.1 Products Covered
This manual contains installation and operating instructions for the single-zone tube furnaces of
model types EHA, EVA, EST and EVT, and the 3-zone models EHC, EVC, EZS and EVZ. The
single-zone models use one controller or programmer operating all elements. The 3-zone models
use three controllers, linked to achieve an extended uniform temperature region.
The horizontal tube furnaces EHA, EHC, EST and EZS are supplied with the controls in an
integral base or separate control box. The “vertical” models EVA, EVC, EVT and EVZ are
supplied with a stand for both vertical and horizontal use, the controls are in a separate box on a
length of flexible conduit
The EST, EVT, EZS and EVZ are split tube furnace designs.
All models are supplied with a pair of “work tube adaptors”, which are made to suit the work tube
outside diameter. Spare or replacement adaptors can be ordered.
1.2 Switches and Lights
1.3 Warning Symbols
1.4 Warning Labels
On the front control panel there are 2 warning labels as shown in Figure 1-1 page 3; they are
numbered 7 and 8. These warnings must be followed for the safe operation of this furnace.
7- Warning label - Do not operate without a work tube. The furnace must not be operated
without the correctly sized work tube and matching correctly sized work tube adaptors or it
could be possible for an operator to access electrically live element coils that could cause
serious injury or death.
8- Warning label - Switch off the furnace before loading and unloading. The furnace heaters
must be switched off using the heater switch item 2 in Figure 1-1 page 3 when the furnace is
being loaded or unloaded. The work tube can become electrically conductive at high
temperatures, presenting a possible hazard to an operator that could cause serious injury or
death if an element failed and collapsed onto a work tube and was not detected.
Instrument switch: when the instrument switch is operated the
temperature control circuit is energised.
Heater light: the adjacent light glows or flashes to indicate that power is
being supplied to the elements
DANGER of electrical shock– read any warning printed next to this
symbol
.
DANGER – hot surface. Read any warning printed next to this symbol.
WARNING: all surfaces of a furnace may be hot.
DANGER – read any warning printed this next to symbol.
Heater switch: the switch disconnects power to the heating elements; unless this
switch is off there is a danger of electric shock when inserting objects into the
furnace