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LMV5000.EN202001V6
9. SWITCH FROM GAS TO OIL AND BACK
(If applicable)
The burner is equipped with a gas valve and air valves for fuel air ratio control (1:7).
When gas firing, the burner capacity is controlled by the stand alone modulating PID
controller that is integrated in the Siemens LMV unit or by the climate computer
through Fiduface.
For oil firing, the burner is equipped with a 2- or 3-stage oil combustion system
(depending on the capacity) with oil valves for fuel air ratio control (1:3). The
combustion capacity is controlled by the stand alone modulating PID that is
integrated in the Siemens LMV unit.
From gas to oil:
1.
Before switching from gas to oil firing, set the
burner load switch to “LOW”
and wait until the burner flame is low. Now set the main switch on the burner
panel to “OFF”.
2.
Check that the boiler temperature setpoint is not below 70°C to prevent oil
condensation. See chapter 6 on how to change setpoint.
3.
Close shut off valve A1.
4.
Set the flue gas inlet valve of the condenser on bypass.
5.
Check that every valve to the oil pump is open and whether the oil pump is
filled with oil. The complete system has to be filled with oil without any air. If
this is not the case it may cause major defects. The oil pump is not a self-
suction pump.
6.
Set the selector switch from “GAS” to “OIL”.
7.
Set the burner load switch to “AUTO” and switch the burner on.
WARNING:
When not specifically stated otherwise, the burner is made for oil as emergency fuel
only. After more than 24 hours on oil firing the burner system may be dirty. Reliable
and clean combustion can no longer be guaranteed.
If a flame failure occurs more than 3 times during start-up, check the furnace for oil.
When the boiler temperature is higher than 65 ºC the oil in the furnace may gasify. At
the next attempt to start, the ignition may ignite the gasified oil and may cause an
explosion
.
The annual maintenance work should include running the burner on oil!
Make sure you have enough oil on stock.
Note: installing, checking and filling the oil tank and oil piping from the oil tank to the
oil pump is not within the scope of our service engineer. This is the responsibility of
the user.
Summary of Contents for RKB
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