When the heat exchanger is cut out and the steam is purged, the oil in the heat exchanger should ( ).
When the cooler is purged, the water source side should ( ).
When the cooler is purging, what the water source side does correctly is ( ).
When the cooler is purged, the water source side valve should ( ).
When the unit stops, the cooler stops and purges for a specified time of not less than ( ).
The unit stops to cool down, and the heating furnace is turned off at the furnace outlet temperature ( ).
When the unit is stopped to cool down, the principle of ( ) should be observed.
The cooling rate of the heating furnace should be controlled ( ) when the unit is stopped for cooling.
When the unit stops to cool down, the heating furnace should ( ).
When the unit stops and does not burn, when the heating furnace extinguishes all the gas nozzle, install the gas tank ( ).
When the unit is stopped, when the heating furnace extinguishes a single self-produced low pressure gas nozzle, it should ( ).
When the unit is stopped, the heating furnace should extinguish all self-produced low pressure gas nozzle ( ).
Sequence of heating furnace vacuum extinguishing gas nozzle ( ) when the unit is stopped.
When the unit stops and the heating furnace extinguishes the oil nozzle, it should ( ).
When the fuel oil line is purged, the fuel oil line should be closed ( ) when the steam is purged from the oil nozzle.
