Sime FORMAT DGT HE 25/15 Para El Instalador página 99

4 USE AND MAINTENANCE
4. 1 GAS VALVE (fig. 17)
The boiler is supplied as standard with a
gas valve, model SIT 848 SIGMA.
4
3
2
1
KEY
1 Upstream pressure intake
2 Intermediate pressure intake
3 Air signal inlet (VENT)
4 Downstream pressure intake
5 Capacity step
6 OFF-SET
4.3 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
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 25/15 with methane, the
display shows:
5
6
Fig. 17
For the 25/15 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:
GAS
METHANE
(G20)
PROPANE
(G31)
-
) at
4.3.2 Calibrating the gas valve
pressures
Measure the CO
2
analyzer.
.
Sequence of operations:
1) Press buttons
time for 5 seconds. (Lo) will appear on
the display and the boiler will work at
minimum power.
2) Press button
3) Search for CO
.
.
4) Press button
MODEL PAR 1
5) Search for CO
- 01
25/15 02
- 03
- 04
- 05
25/15 06
- 07
- 08
- -
6) Press buttons
- -
- -
- 20
7) Press button
4.4
values with a combustion
To simplify maintenance operations on the
boiler, it is also possible to completely remo-
ve the shell, as shown in figure 19.
and at the same
Turn the control panel to move it forward
and be able to access the internal compo-
nents of the boiler.
1
2
Fig. 18
to raise the boiler to
maximum power (Hi) .
values at max power sta-
2
ted below by acting on the capacity step
(5 fig. 17):
MAX power
Boiler CO CO
2
model (Methane) (Propane)
25/15 9,0 ±0,3 10,0 ±0,3
to bring the boiler to
minimum power (Lo).
values at min power sta-
2
ted below by acting on the OFF-SET adju-
stment screw (6 fig. 17):
MIN power
Boiler CO CO
2
model (Methane) (Propane)
25/15 9,0 ±0,3 10,0 ±0,3
and several times
to verify the pressures; if necessary,
make the appropriate corrections.
to exit the function.
DISASSEMBLING
THE CASING
IT
ES
PT
ENG
2
2
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