Checking The Ignition Load; Matching The Working Points "Speeds For Low-Fire (P1), Ignition Load (P0) And High-Fire (P2) For The Heating Engineer To The Application; Prerequisites - Siemens LME7 Series Basic Documentation

Checking the ignition load



Prerequisites

Building Technologies Division
Infrastructure & Cities Sector

To check the ignition load speed, set the required worst-case conditions close to
the overvoltage limit

Start the burner and check the speed, the volumetric air flow or air pressure by
taking appropriate measures while ensuring compliance with the relevant
standards (e.g. EN 676) in the ignition phase (P38, P40 or P44)

If the worst-case requirements are not satisfied, change safety parameter 675.01
accordingly
On successful completion of the test, reset parameter 559 to control as described
above (setting value = 1).
Note:
To store the settings in the PME... program module, a manual backup is required.
Also see chapter Manual backup.
27.4.5 Matching the working points "Speeds for low-fire (P1),
ignition load (P0) and high-fire (P2) for the heating
engineer to the application

Initial settings of the basic PWM parameters on the OEM level are made

Unit is wired up in accordance with the proposed application

Mains voltage is available

Safety loop is closed

There is no heat request, unit is in standby (OFF)
Basic Documentation LME7...
27 PWM settings
232/245
CC1P7105en
29.11.2011