Training manual ALTEAS & GENUS ONE
Page. 17 of 88
The pump is full modulating.
The pump speed change in relation with the boiler
power
Performed from the flow and return NTC. If the
temperature rises 102°C a lock out occurs,
indicated on the display with 1 01.
After flame detection the boiler is free to modulate
the power according to the required thermal load
and realized thanks to the speed of the ventilator.
Modulation is carried out between the maximum
heating power values (adjustable from the control
panel with parameter 2 31) and the minimum
power value (value fix). The shutdown
temperature of the burner is operated as follows:
1° min after flame detection:
T off = T set-point + 8°C
2° min after flame detection:
T off = T set-point + 6°C
starting from the 3
rd
min after flame
detection:
T off = T set-point + 4°C
This logic is used to prevent the burner from
shutting down too quickly with the system at
temperature.
Next ignition can be delayed from 0 to 7 minutes
(default value = 2 min., adjustable from the control
panel with parameter 2 36.
N.B. Starting from heating request, the “limit temperature” (88°C, not adjustable fixed value) remains on
executed by the primary exchanger outlet probe (NTC 1).
When the burner is switched OFF, post ventilation is performed in order to evacuate the residual exhaust
during 5 seconds.
If there is a bad circulation through the heating system, the automatic by-pass can be opened (max
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