Hoval AgroLyt 20, Руководство по эксплуатации

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Function of the N5.2TopTronic
®
lambda controller
• The controller is switched on via the main switch 1. The individual operating mode is shown on the dis-
play (point 13, page 16).
• Closing the loading door initiates an automatic function sequence:
- The forced draught fan is switched on at high speed (operating mode 1, optimised heat-up phase).
- The system changes over to full load mode (operating mode 2) when the flue gas temperature exceeds
about 170 ºC.
- If the storage tank temperature exceeds about 70 ºC (parameter P01, see page 19), the boiler output is
reduced to adjust it to the effectively required thermal output (operating mode 3, modulating output).
- If the storage tank temperature drops below 70 ºC during burnout, the boiler is switched back to full load
operation (operating mode 2).
• When the wood is used up and there are only embers left in the loading chamber, the burnout optimisation
mode is initiated (operating mode 4). The flow rate of the air supplied to the embers is reduced by slowing
down the fan and partially closing the air dampers.
• A drop in the flue gas temperature to below 120 ºC indicates that there is no fuel left and that only glowing
charcoal remains in the boiler. This condition triggers the shut-down of the pump and the fan unit, and
the air dampers are closed off completely; this prevents the boiler from cooling down and allows a certain
quantity of embers to remain for subsequent reloading of wood without the need for relighting (operating
mode 5, ember preservation).
• After expiry of the ember retention time (default setting 90 minutes), the system switches over to operating
mode 6 (residual heat utilisation). The heat remaining in the boiler is now transferred to the storage tank.
• The residual heat utilisation mode is completed when the boiler temperature drops below 40 ºC and the
boiler is switched off (operating mode 0, boiler off).
• The smouldering gas extractor is turned on when the fuel loading door is opened to prevent any smouldering
gases from escaping (operating mode 8). In this operating mode the forced draught fan runs at increased
speed and extracts the smouldering gases directly through the smouldering gas channel.
• If the fuel does not light during heat-up and the flue gas temperature does not rise above 120 ºC within 30
minutes, the automatic cut-out switches off the fan unit; the operating mode changes automatically from 1
(heat-up phase) back to 0 (boiler off).
The boiler control unit should always be operational (also in summer when the boiler is not operating) in order
to keep both the boiler protection function and the regular lambda sensor function test in an active state. The
associated electrical consumption is negligible.
When the main switch is turned off and then on again, the control unit reacts as if a power failure had occurred:
it automatically changes over to operating mode 1 (heat-up phase). If the boiler does not subsequently heat
up, it is possible to cancel this operating mode by pressing the “Stop” key (press for 5 seconds) to prevent
the fan from running unnecessarily for 30 minutes.
Heating system control
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