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4.1
GAS VALVE (fig. 17)
The boiler is supplied as standard with a
gas valve, model SIT 848 SIGMA.
4.3
GAS CONVERSION (fig. 18)
This operation must be performed by
authorised personnel using original Sime
components.
To convert from natural gas to LPG or vice
versa, perform the following operations
– Close the gas cock.
– Replace the nozzle (1) and the gasket (2)
using those supplied in the conversion kit.
– Test all the gas connection using soapy
water or special products. Do not use
open flames.
– Apply the nameplate with the new gas
flow layout.
– Calibrate the maximum and minimum
pressures of the gas valve following the
instructions provided in paragraph 4.3.2.
4.3.1
New fuel configuration
Access the parameters section by pres-
sing the control panel keys (
and
) at
the same time for 5 seconds.
The red LED flashes and the display shows:
Scroll the parameters using
or
.
To enter the fuel configuration paramater
PAR 01, use
or
.
The set value
flashes
and if the boiler in
question is a
20 T
with methane, the
display shows:
For the
20 T
boiler to function with LPG,
press until
06
appears
.
Confirm this value using
or
.
Exit the parameters section by pressing
.
The table below gives the values to set
when the supply gas is changed:
4.3.2
Calibrating
the gas valve
pressures
Measure the CO
2
values with a combustion
analyzer.
Sequence of operations:
1)
Press buttons
and
at the same
time for 5 seconds.
(Lo) will appear on the display and the
boiler will work at minimum power.
2)
Press button
to raise the boiler to
maximum power (Hi).
3)
Search for CO
2
values at max power sta-
ted below by acting on the capacity step
(5 fig. 17):
4)
Press button
to bring the boiler to
minimum power (Lo).
5)
Search for CO
2
values at min power sta-
ted below by acting on the OFF-SET adju-
stment screw (6 fig. 17):
6)
Press buttons
and
several times
to verify the pressures; if necessary,
make the appropriate corrections.
7)
Press button
to exit the function.
4.4
DISASSEMBLING THE SHELL
To simplify maintenance operations on the
boiler, it is also possible to completely remo-
ve the shell, as shown in figure 19.
Turn the control panel to move it forward
and be able to access the internal compo-
nents of the boiler.
4.5
MAINTENANCE
To guarantee functioning and efficiency of
the appliance, in respect of the legal provi-
sions in force, it must be regularly checked;
the frequency of the checks depends on
the type of appliance and the installation
1
2
3
4
5
6
Fig. 17
KEY
1
Upstream pressure intake
2
Intermediate pressure intake
3
Air signal inlet (VENT)
4
Downstream pressure intake
5
Capacity step
6
OFF-SET
4
USE AND MAINTENANCE
1
2
Fig. 18
GAS MODELS
PAR 1
12 T
01
METHANE
20 T - 25
02
(G20)
30
03
35
04
12 T
05
PROPANE
20 T - 25
06
(G31)
30
07
35
08
-
-
-
-
-
-
-
-
20
MAX power
Boiler
CO
2
CO
2
model
(Methane)
(Propane)
12
9,2 ±0,3
10,0 ±0,3
20-25-30-35
9,0 ±0,3
10,0 ±0,3
MIN power
Boiler
CO
2
CO
2
model
(Methane)
(Propane)
12
9,2 ±0,3
10,0 ±0,3
20-25-30-35
9,0 ±0,3
10,0 ±0,3
Содержание FORMAT DGT HE 12
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