Difference between high limit stat and thermal lockout stat?

Question

I found this in the technical sheet of an industrial dishwasher I am translation into Italian from English

http://www.caterkwik.co.uk/shop/39/83/index.htm

second product click on click here for a view behind the front panel

Answer 1

The high limit stat , protects the heater elements , plastic components , from overheating in an event of a failure in the thermal lockout stat which can be set be the owner of the machine , for example you may wish the highest setting be set at 90 C because of patterned cups , this will never go higher than 90 , but in the event of a failure the high limit will cut out the power at say 95 C , thus protecting the machine , the high limit has to be reset manually , thus ensuring the owner that they know of a possible fault

Answer 2

A high limit stat is a safety cutout device & will stop any other controls applying heat once a certain temperature has been reached.

In this case, the thermal lockout stat sets a maximum temperature for the cycle, which the actual temperature adjustment thermostat can't then exceed.