65
EN
5.7
Adjusting the burner at various installation altitudes
The appliance leaves the factory calibrated for operating at sea level.
(***)
Data measured with flue draught of 0 mbar
ALTITUDE
DUETTO HE EV
25
35
Nozzle
Pump pres-
sure *
(bar)
Diesel flow
rate **
(kg/h)
Air shutter
(notch)
Nozzle
Pump pres-
sure *
(bar)
Diesel flow
rate **
(kg/h)
Air shutter
(notch)
0
m.a.s.l. Danfoss 0,55
x 60° H
12
2,18
3.5
Danfoss 0,65
x 60° H
12
2,9
5,5
(*)
The pump pressure stabilises after roughly 5 minutes of operation.
(**)
Diesel flow rate value referred to a lower heating value (Hi) of 12,01 kWh/kg.
When the thermal unit is installed at altitudes up to maximum 1,300 m.a.s.l., due to the lower air density, the factory adjustments for
the burner must be modified as follows:
– keep the nozzle mounted in the factory
– do not vary the position of the combustion head
– gradually reduce the pump pressure to reduce the fuel flow rate
– adjust the air shutter by taking the following readings:
- CO
2
(%)
- CO (ppm)
- NOx (ppm)
- Bacharach index
- flue gas temperature.
a
WARNING
All operations must be carried out exclusively by the Sime Technical Support Service or by professionally qualified personnel,
according to the instructions appearing in this manual under the paragraph
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