77-014 - Yasui Rotating Burnout Furnace 37+
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10-4. OVER HEAT PROTECTION DEVICE
CAUTION
[1] Before operating burnout of stone-set flasks, be sure to check the set temperature limit value
of overheat protection device, and change the set value if necessary to proper value.
[2] When changing the set value, consider that actual temperature may overshoot the set value
of overheat protection device depending upon capacity of flask etc.
[3] The thermocouple for overheat protection device is consumable. If the thermocouple is
damaged by wire-breakage etc. because of deterioration, the overheat protection device cannot
work. So, always keep a spare thermocouple (available as a spare part) in your stock and
replace the deteriorated thermocouple with a new one as far in advance as possible.
10-4-1.
ON AND OFF OF OVERHEAT PROTECTION
If the overheat protection key switch located below
the operation panel of the front panel is turned to ON,
this overheat protection system becomes effective.
If it is turned to off, the overheat protection system
does not work.
10-4-2. OPERATING OVERHEAT PROTECTION
1) Check the set temperature limit on the overheat protection device and change the limit value if
necessary considering properties of the stones, volume of flask etc., in accordance with the
procedure described in the next page.
(Standard set value is 770 degrees centigrade.)
2) If actual temperature in the furnace has become higher than the set temperature limit during
burnout operation, E1605 is displayed and heating is suspended.
The manufacturer shall in no event be liable for any consequential or indirect damages including,
but not limited to, loss of production or loss of profit (including burnout for normal precious metal
casting, for stone-in-wax casting and etc.) or damages due to machine downtime. Casting results
(including burnout for normal precious metal casting, for stone-in-wax casting and etc.) by the
machine or by this manual are not compensated by the manufacturer.
