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Operation and Maintenance Manual - EN
If the function (Parameter S34 = 2) is turned on in the boiler, the following practice is used
for boilers DC40GSP and DC40SPT:
For wood heating, swich the selector switch to the top position (I) – the wood burning symbol.
To start heating with pellets, swich the selector switch the bottom position (II) – the pellet
burner symbol. Model DC40GSP and DC40SPT with the automatic start function activated (default
settings) allows swich the selector switch at any time, regardless of fuel being fired.
Setting the selector switch into the position for pellets with initiate the burner DIAGNOSTICS to
determine the existing boiler status (waste gas temperature, boiler temperature, temperature inside
the buffer tank).
In case the preconditions for immediate burner launch are not met, that means the boiler is at the
wood firing or burnout stage, when the magazine still contains sufficient quantity of wood, the
burner will be set into standby. The exhaust fan on the boiler will remain in operation (provided
the parameter S6 = 11, 4 has been set) to ensure proper burnout of wood.
The burner display will show the AUTOSTART message at this stage.
If the AUTOSTART message keeps flashing slowly, the precondition defined for particular
function (S34 = 1 or S34 = 2) has not been met – the wood burnout is still in progress.
If the AUTOSTART is flashing fast (wood burnout is completed), the precondition defined by
the particular function has not been met (S15 = 2), which means that the temperature TV on the
accumulation (buffer) tank has not dropped below the set value given by the parameter S16 (the
energy from the accumulation tank has not been exhausted). This condition may also occur, if the
control thermostat on boiler has not been activated or if the end limit switch on the top stoking
doors has not been pushed (no star symbol lit up at the thermostat symbol in the burner display).
Once all the preconditions for burner launch have been met (wood burnt out, accumulation tank
exhausted), it will be commissioned. The exhaust fan will not be in use during regular pellet
firing process (parameter S6 = 11).
Never forget to push limit switch with a push-button!
INFO – In case of an electric outage, the burner will perform a DIAGNOSTIC and, if all
conditions are met, will burn out and return to normal operation. Otherwise it will await the
fulfillment of previous conditions (drop of exhaust and water temperature).
If we want to use wood to heat up the boiler, it suffices to place the switch on the wood
position (I). However, it is better to first keep the switch on the „0“ position for 10 - 15
minutes so that the burner can properly burn out. This is an ideal time to prepare the fuel
for stoking.
WARNING – DC40GSP and DC40SPT boilers do not allow you to control the solar heating
function directly from the pellet burner. Additionally the TK and TSV sensors are used for
measuring the temperature of the boiler and exhausts during this function.
• Parameter S35 – characterizes the limit (max.) temperature of the boiler TK, during which the
burner will automatically start during the AUTOSTART function (S34 = 2)… (75 °C)
• Parameter S36 – characterizes the limit (max.) temperature of the exhausts TSV, during which the
burner will automatically start during the AUTOSTART function (S34 = 2)… (80 °C)
44


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