Log boiler 20 - 60 kW Operation

Operation

As soon as the fuel has been ignited and the exhaust temperature has exceeded 100°C, an arrow appears indicating that the ignition door and the insulation door should be closed.

Fig. 10-2: Close ignition and insulation doors

When the insulation door is closed, the boiler switches to [Ignition] and later to [Heating] mode. Split logs and fire are depicted in the boiler.

As soon as the boiler is supplying heat to the buffer, the buffer pipes are completely displayed as is the boiler pump.

Fig. 10-3: Log boiler in heating mode

If the fuel in the boiler has been burned and the exhaust temperature is below 80°C, the boiler begins the ember burnout and afterwards switches to [Ready] mode.

If the [ASH] button was not pressed during heating, some charcoal and embers will remain in the boiler by design so that new fuel can be ignited more easily when it is added later.

If the button was pressed during heating, the boiler will perform a complete ember burnout.

[Boiler] function block – log boiler

10.2.2

Operating modes

Heating

The boiler is in heating mode and is channelling heat to the consumers.

Ember burnout

The fuel in the boiler is almost completely burned and the exhaust temperature is below 80°C.

Ready

The boiler is switched off and can be started up at any time.

Malfunction

A malfunction has occurred, preventing the boiler from heating. The cause can be found in the list of error messages.

Calibrating lambda probe

The lambda probe is undergoing automatic calibration.

It is not possible for the unit to heat whilst in this mode.

Insulation door open

The boiler's insulation door is open. If the boiler was previously in [Heating] mode, it will switch back to this mode after the insulation door is closed.

If the boiler was previously in a mode other than

[Heating], it will switch to [Ignition] mode after the insulation door is closed.

Ignition

The boiler's insulation door was opened earlier to add fuel or to start up the boiler. After the insulation door is closed, the boiler switches to this mode.

If the boiler is not being started up immediately, it can be switched off again by pressing the button. Then the button shines red.

Overtemperature

The boiler temperature has exceeded the maximum temperature [Boiler max]. The draught fan is switched off and a message appears on the screen indicating that less fuel needs to be added in future. Only when the boiler has cooled below 86°C will the draught fan switch on again and heating resume.

TWIN operation

Optional: only with additional TWIN burner

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[Boiler] function block – log boiler

This mode appears when the buffer needs heat but the log boiler cannot provide it. Then the control system starts the TWIN burner to supply heat to the buffer. The current status of the TWIN burner is shown in the

[Twin] FUB.

Operation

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Operation [Boiler] function block – log boiler

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