17
While the machine is heating, check for alarms and listen for the alarm
buzzer. In particular, check for any exhaust fan failure alarms. Element
failure alarms (if element monitor option is selected) usually occur in the
"warmup" mode. The effect of an element failure is generally minimal
unless two failed elements are adjacent to each other.
NOTE: Allow the system to stabilize and to enter the "ready" mode
before processing any product.
3.2.9.4.The “Exit” field will terminate and take you out of furnace
operation mode when a safe preset temperature is reached.
You must be in “Process Off” condition to exit (indicated by a red light).
3.2.10.
Transport Speed
Move the cursor to the Belt Speed field. Enter the desired transport speed. Vary
the conveyor speed from minimum to maximum, checking for smooth operation at
all speeds. To check for belt speed accuracy, set the speed at its midrange setting.
Place a coin or metal ruler on the moving belt and time through two fixed points
while the furnace is in the off or cooldown mode.
3.2.11.
Power Off
Before pressing POWER OFF, the furnace must be in cooldown mode.
Press the POWER OFF button. Under normal conditions, the furnace will turn off
when all zones cool below 100
o
C.
If POWER OFF is pressed while the furnace is in the warmup or ready mode, the
furnace will remain in normal operation until the cooldown mode is selected.
3.2.12.
Replace Covers
Install any covers that were removed during the functional checkout.
NOTE: All functions must operate properly before proceeding. Refer to the
Service Information Section and correct any malfunctions before proceeding.
3.2.13.
Shutdown Sequence
The furnace should be shut down when more than an hour will elapse between
production runs. A shutdown conserves energy and prolongs the life of the furnace
and elements. The furnace will enter the “cooldown” mode. Once the zones have
cooled sufficiently and the furnace is in the “off” mode, the atmosphere supply can
be shut off at the source.
3.2.14.
Auto Shutdown Sequence.
The furnace must be in cooldown mode.
Summary of Contents for 2115150301
Page 23: ...22 Figure 3 8 1 1 Event Logging ...
Page 44: ...43 Section 6 PRODUCT SPECIFICATION 6 PRODUCT SPECIFICATION ...
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