2017_E_TYPE-HL.doc Page 12 of 55 24-Oct-2017
2.2.5 Reset Faults
The Reset Faults push buttons are located on the flame safety modules. It is used to
resume normal operation after either a Process or Oxidizer fault has been corrected.
2.2.6 OTS Test
The OTS (Over Temperature Suppression) Test push-button is used to verify that the
OTS spray misting system is functioning properly. The OTS system is an integral and highly
important safety feature that ensures that a runaway combustion event that drives up either the
process chamber, the oxidizer chamber or the stack gas temperatures above acceptable limits
does not occur.
Before starting the processing cycle, the operator should open the process chamber doors
and push the OTS Test push-button. The operator should observe and ensure that the misting
nozzles are misting properly.
The OTS misting nozzle must mist to be effective. If the water is injected directly
without misting, it will not have any effect in suppressing over-temperature conditions in the
process chamber. This visual inspection will verify that the misting pin is not broken and that
the nozzles are not plugged. This inspection is very important and should be performed prior to
each start-up.
2.2.7 Stack High Limit Controller [ETC-S]
Some older model ovens include an Excess Temperature Control-System (ETC-S) switch
located in the stack base. If the temperature of the flue gas from the oxidizer chamber exceeds a
preset temperature, the ETC-S opens up the circuit to the system and shuts it down. However, in
1996 the system was changed and is now controlled from the panel with a manual reset
temperature controller. This controller is labeled ETC-S HIGH TEMP.
Note: The power supply to the water solenoid valve is not affected when the oven high
limit control system is tripped. The OTS water mist spray system can continue to operate to
lower the chamber temperature.
To Next Page
Loading...