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5.4
Fan adjustment
Modulation is based on variable-speed technology.
Combustion air delivery can be adjusted by varying the motor's
speed (rpm).
The proportioning gas train delivers the right amount of fuel, de-
pending on the pressure detected in the purging circuit.
Hence the output delivered is adjusted by varying the motor's
speed of rotation. The speed of the motor can be adjusted setting
the control box.
5.5
Matching the working points "Speeds for low-fire (P1), ignition load (P0) and high-fire (P2) for the heating
engineer to the application
•
Mains voltage is available
•
Safety loop is closed
•
There is no heat request, unit is in standby (OFF)
Proceed as follows (Fig. 27):
A
S8595
A
–
keep the button
and
pressed for > 5 seconds;
–
display shows OFF blinking.
If there is no operating action for >30 seconds, the
LME7... changes automatically to standard mode.
This means that adaptation of the working points
must be started again.
CAUTION
–
Heat request (temperature controller) ON.
–
Basic unit is started and runs through the startup phase. Then,
the unit runs through the respective program phases in accor-
dance with the program sequence; the numbers appear blink-
ing.
–
The unit proceeds to the end of the prepurge phase (P30),
goes to the start load position and then displays P0 (ignition
load sped). In the process, the display shows alternately P0
and a 3-digit number.
NOTE:
The 3-digit number shows the setting value for parameter P0/P1 or
P2 as the speed and must be multiplied by 10.
+
A
–
By pressing
and
step sizes of 10 rpm within the limits predefined by the OEM
(P0max, P0min).
20062175
Start-up, calibration and operation of the burner
-
+
nfo
+
-
or
simultaneously de-
-
or
the speed can be changed in
The adjustments, via the onboard operating panel (Fig. 27), are
carried out by means of the positions:
START
determines the ignition position
MIN
determines the minimum modulation
MAX
determines the maximum modulation
NOTE:
the setting value of P0 must be greater than the setting value of P1.
The basic unit checks the setting values. If setting rules are violat-
ed, the unit goes to lockout and displays error message Loc: 225.
nfo
–
Press
to transfer the setting value to the onboard memory.
–
The startup phase proceeds. The burner is ignited.
The program proceeds to lowfire position P1.
In the process, the display shows alternately P1 and the speed.
–
By pressing
step sizes of 10 rpm within the limits predefined by the OEM
(P1max, P1min).
nfo
Fig. 27
–
Press
to transfer the setting value to the onboard memory.
–
The burner proceeds to high-fire position P2. In the process,
the display shows alternately P2 and the speed.
–
By pressing
step sizes of 10 rpm within the limits predefined by the OEM
(P2max, P2min).
–
Press
to transfer the setting value to the onboard memory.
/reset
–
By pressing ESC (press
ting process is ended and the burner changes to the operating
position.
–
In the operating position, the output predefined by the external
load controller applies.
NOTE:
To store the settings in the PME... program module, a manual
backup is required.
30
GB
+
A
-
and
or
the speed can be changed in
+
A
-
and
or
the speed can be changed in
+
-
or
simultaneously) the set-
(P0)
(P1)
(P2)
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