Wacker Neuson 5000620172, Operator'S Manual

Page: 64 / 162

wc_tx001903gb.fm
64
Operation E 1100
Ignition
carryover
The ignition carryover state starts as soon as the flame is established.
During this state:
„
The fuel shut-off valve is open (energized).
„
Pressurized fuel atomizes at the burner nozzle.
„
The atomized fuel is ignited by the electrodes.
„
The electrodes stay powered for up to 10 seconds after flame is
sensed.
When the ignition carryover state has elapsed:
„
The ignition transformer is shut off.
„
The burner control enters the run state.
If the flame is lost during the ignition carryover state:
„
If the lockout time has not expired, the burner control returns to trial-
for-ignition state.
„
If the lockout time has expired, the burner control enters the recycle
mode.
Run The run state starts and continues once the ignition carryover state has
elapsed. During this state:
„
The fuel shut-off valve is open (energized).
„
Pressurized fuel atomizes at the burner nozzle.
„
The flame is monitored by the cad cell.
When the setpoint is reached (call for heat satisfied), the burner control
enters the burner-motor-off delay state.
If the flame is lost during the run state:
„
The burner control enters the recycle mode.
Burner-motor-
off-delay
The burner-motor-off-delay state starts immediately after the setpoint is
reached, i.e., the call for heat has been satisfied. The time of this state
is 30 seconds. During this state:
„
The output contacts of the temperature controller open, interrupting
the circuit between terminals labeled “T”.
„
The fuel shut-off valve closes (de-energizes).
„
The burner motor runs until the burner-motor-off delay expires, then
the burner motor turns off.
„
The burner control returns to the idle mode.
If the cad cell detects flame during the burner-motor-off-delay state:
„
The burner control goes into the standby state.
State Action or Function