Siemens LME71, Основная документация

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Smart Infrastructure Basic Documentation LME7... CC1P7105enr
6 Function 24.07.2020
6 Function
6.1 Preconditions for burner startup


LME7 is reset

All contacts in the line are closed, there is a request for heat

No undervoltage

Air pressure switch or POC must be in its no-load position, or Dbr1 is connected to
terminal X2-02 (depending on program sequence)

Flame detector is darkened and there is no extraneous light

All contacts in the safety loop are closed
6.2 Undervoltage


Safety shutdown from the operating position takes place should mains voltage
drop below about AC 75 V (UN = AC 120 V)

Restart is initiated when mains voltage exceeds about AC 100 V (UN = AC 120
V)


Safety shutdown from the operating position takes place should mains voltage
drop below about AC 165 V (UN = AC 230 V)

Restart is initiated when mains voltage exceeds about AC 195 V (UN = AC 230
V)
6.3 Controlled intermittent operation
Depending on the PME7, refer to
User Documentation A7105.x .
After no more than 24 hours of continuous operation, the LME7 initiates an automatic
controlled shutdown followed by a restart.