2.6
HEATER UNIT
In
“SOLO 20-30-PR 40 OF/BF”
mod-
els, the heater unit comes on with the
consensus of the burner, after a delay
of a maximum of 90 seconds required
to bring fuel in the nozzle holder area
up to a temperature of 65°C. Once this
temperature has been reached, the
thermostat, which is located above
the preheater (1 fig. 15/b), will give
consensus for the burner to start.
The heater will remain on for as long
as the burner stays on and go of f
when the burne goes off.
The
“DUETTO 20-30-PR 40 OFi/30
BFi”
model has a lower power heater
which remains on all the time after the
main switch is turned on in the control
panel in winter only. The first time it is
turned on at the beginning of the sea-
son, it may be difficult for the burner to
come on, and the boiler may stop work-
ing if the operating cycle is begun
before te correct fuel temperature has
been reached.
When it is started again, enough time
will have passed (2 - 3 minutes) for the
fuel to have reached the correct tem-
perature for start-up.
“SOLO 40 OF/BF - DUETTO 40
OFi/BFi” model have no heater unit,
as it is not required.
2.7
ELECTRICAL CONNECTION
The boiler is supplied with an electric
cable and the electric power supply to
the boiler must be 230V-50Hz single-
phase through a fused main switch.
The stat cable, whose installation is
compulsory for obtaining a better
adjustment of the room temperature,
must be connected as shown in fig. 9 -
9/a.
NOTE:
Device must be connected
to an efficient earthing sys-
tem. SIME declines all responsibili-
ty for injury or damage to persons
resulting from the failure to pro-
vide for proper ear thing of the
appliance.
Always turn off the power supply
before doing any work on the electri-
cal panel.
75
1
2
5
6
7
RESET
TWICE
ONLY
12
1
2
3
bar
KEY
1
Gas-oil pump
2
Pressure gauche intake
3
Pressure adjustment screw
Fig. 8
Fig. 8/a
Summary of Contents for DUETTO 20 OFi
Page 1: ...Solo OF BF Duetto OFi BFi IT ES PT GB CERTIFICAZIONE DEL SISTEMA DI QUALITA AZIENDALE ...
Page 86: ......
Page 87: ......
