BURN/FIRE WARNINGS (CONTINUED)
2.
Do not locate the Hot Spot 110 on a flammable surface.
•
The Hot Spot 110 is equipped with a cooling fan which will maintain the shell at a safe
temperature. Objects removed from the Hot Spot 110 furnace chamber while hot may cause a
fire if placed on a flammable surface.
•
Zircar Zirconia, Inc. recommends that when hot objects are removed from the furnace they
always be placed on a trivet appropriate for the temperature.
3.
Avoid touching the Hot Spot 110 powder coated steel shell when the furnace is in operation. The
metal may become hot and could cause a burn injury with extended contact.
4.
Use heat resistant gloves and darkened eye protection when unloading a hot object from the
Hot Spot 110 furnace chamber. Handling hot objects with bare hands will result in serious burns
of the skin. Radiant heat may cause occular damage if not wearing darkened eye protection.
HEATING ELEMENT WARNINGS
1.
Always use eye protection and gloves when loading and unloading the furnace and when
handling the heating elements.
2.
The Hot Spot 110 is heated with molybdenum di-silicide (MoSi
2
) heating elements which form a
protective silica glaze over the surface of the element. Elements which have been operating at a
high temperature for a prolonged time and then cooled down may have internal stresses which
can cause the protective silica glaze to splinter into small fragments. There have been instances
where heating elements that have been cold for several days have emitted a shower of fine glaze
particles when touched. If a silica glaze shower does occur, vacuum up the silica flakes before fir-
ing again. The flakes could melt into the floor causing premature insulation failure. The elements
are not metal and they are as fragile as glass.
GAS PORT WARNINGS
The following warnings apply if your Hot Spot 110 is equipped with the
optional gas port
:
1.
Do not introduce any flammable atmospheres into the Hot Spot 110 chamber. This may cause an
explosion, possibly leading to serious injury or death.
2.
Always provide good ventilation in the immediate and surrounding areas whenever using the
optional gas port to introduce inert gasses into the Hot Spot chamber. Accumulated gasses such
as nitrogen and argon can be inhaled and result in asphyxiation.
3.
When operating the Hot Spot 110 at 1600 °C in an atmosphere of pure argon and pure nitrogren,
the life of the electric heating elements may be reduced to a few weeks as compared to their
normal life which can be in excess of two years. A discussion of the temperature limits of the
MoSi
2
elements in various atmospheres can be found at www.kanthal.com and
www.isquaredrelement.com.
2
R-110M-01 Rev00
