Wacker Neuson E 2200, Operator'S Manual

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Operation E 2200 / E 3000ES
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wc_tx001667gb.fm
4.24 Burner Controller Periods and Modes
Periods The burner controller has several periods it sequences through during normal
operation. These periods are described below.
.
Period Action or Function
Power up As soon as power is supplied to the burner controller, it conducts an
internal safety check. If all internal conditions are OK, the burner
controller enters the idle mode and will remain there until there is a call
for heat, or power is disconnected.
Safety
(5 seconds)
When the setpoint of the temperature controller is set at a temperature
higher than that of the heat transfer fluid, the output contacts of the
temperature controller close, completing a circuit between terminal “T”
and “3T” of the burner controller. This is the call for heat.
The burner controller initiates the safety period.
If flame or light is detected, the burner controller remains in the idle
mode and no other functions take place.
If flame or light is not detected after 5 seconds:
„
Power is sent to the burner motor/fuel pump. Fuel is pumped from the
supply tank and returned to the supply tank through the return/bypass
port of the fuel pump. This process purges air from the fuel lines.
„
Power is sent to the electrodes and any residual fuel is burned off.
„
Fresh air fills the combustion chamber.
„
The valve-on-delay period starts.
Valve-on-
delay
The valve-on-delay period lasts 15 seconds. It is enabled (turned on or
off) with DIP switch 3. When enabled:
„
Power is sent to the burner motor/fuel pump.
„
Power is sent to the electrodes.
„
The fuel shut-off valve is energized (opens) and fuel flows to the noz-
zle after the valve-on-delay times out.