Despatch LFD Series with Protocol Plus Manuel d'utilisateur télécharger pdf (Page 20)

Note that in a Class A oven, the heater can not be energized until the forced exhaust

system has brought in a minimum amount of fresh air into the chamber. The purge

timer provided prevents the heater from energizing until the oven has had enough time

to bring in the amount of fresh air required. The purge timer is energized by the airflow

switch which closes when the exhaust system is running.

The pre-determined purge time is two minutes for the LFD1-42 and LFD2-24 and three

minutes for the LFD2-11.

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Despatch LFD Series with Protocol Plus Manuel d'utilisateur Page 20