Lamtec VMS 4, Руководство пользователя

Страница: 11 / 146

10
1 General Information
The operating states are predefined in the VMS through potential-free contacts
–
Burner on
– Control enabling
– Pre-purge
– Recirculation enabling
– Flame signal
– Fuel selection
The unit is of error-proof construction.
1.3.2 Purpose Internal Firing Rate Controller
This software option enables the calculating of the burner's required firing rate setting contin-
uously for a specified setpoint value (referred e.g. to temperature or pressure), through com-
parison with the actual value. This firing rate setting can be notified internally to the electronic
fuel/air ratio control as the specified value.
1.3.3 Purpose of Internal O
2
Trim
This software function makes it possible to regulate one or several actuators independently of
a switched-on O
2
actual value. By using a self-optimising controller strategy, it is also possible
to regulate burners with frequent firing rate changes.