Blodgett KLT-E Series - Manual (Page 12)

10 OM-KLT-E
Sequence of Operation
The following “action-reaction” outline is provided to help understand how the kettle
works.
When the operator starts up the kettle by turning the operating thermostat dial from
“OFF” to a desired setting, the thermostat switch closes. This lights up the heating
indicator light and causes the contactors to close, allowing power to flow to heating
elements.
When the temperature of the steam jacket reaches the value corresponding to the
dial setting, the thermostat switch opens. This turns off the heating indicator light and
causes the contactors to open, stopping the power to the heaters.
As soon as the thermostat senses that the kettle is cooking below the set point, the
thermostat switch closes, the heating indicator light comes on, the contactors close,
and the heaters come on again. On-off cycling continues, keeping the kettle at the set
temperature.
This is why the heating indicator light cycles on and off during normal operation.
Every time the kettle is tilted, the tilt cut-off switch interrupts the power supply to the
heaters, so that the heating elements will not operate while not submerged in the
jacket water.
If steam pressure greater than 50 PSI is generated in the jacket, the safety valve will
open and relieve the excess pressure.
If the jacket water level gets too low before the heating elements overheat, the high-
limit control will open and shut off power to the elements until the kettle cools.
Setting the operating thermostat dial to “OFF” shuts down all control and heating
circuits.