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4
USE AND MAINTENANCE
4.1
GAS VALVE (fig. 16)
The boiler is supplied as standard with a
gas valve, model SIT 822 NOVAMIX (fig. 16).
EV1
KEY
1
Upstream pressure intake
2
Downstream pressure intake
5
Shutter
6
OFF-SET
4.2
GAS CONVERSION (fig. 17)
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 with OR (1) and gasket
(2) with the one supplied in the kit.
– Inspect all the gas connections using
soapy water or relevant products. Do not
use naked 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 4.2.2.
4.2.1
New fuel configuration
5
5
For access to the installer's parameters,
press simultaneously keys
5 seconds (3 fig. 12).
The parameters will scroll up and down
with the keys
and
The display pane will show the values of the
1
1
parameter PAR 1.
5
If the boiler is a methane (G20) model, SET
69 will be displayed:
To change the fuel to propane (G31), it is
2
2
necessary to set SET 71, by pressing the
3
key
.
4
The standard display will automatically
1
return after 10 seconds.
The table below shows the SET settings to
2
62
4
ATTENTION: Before performing any work on the boiler, make
sure that the same and its components have cooled in order to
prevent the risk of burns due to high temperatures.
EV2
5
6
2
1
Fig. 16
enter when the type of gas fuel is changed.
METHANE
PROPANE
5
5
3
3
and
for
4.2.2
1
1
3
3
.
Measure the CO
analyzer.
2
2
Sequence of operations:
1) Press and hold the button down for a
4
4
4
2) Press the button for a few seconds
3) Identify the CO
2
1
GAS
MODEL
220 BOX ErP
330 BOX ErP
(G 20)
440 BOX ErP
550 BOX ErP
660 BOX ErP
220 BOX ErP
330 BOX ErP
(G 31)
440 BOX ErP
550 BOX ErP
660 BOX ErP
Calibrating the gas valve
pressures
values with a combustion
2
5
5
3
.
few seconds
1
1
values at max. power by
2
2
2
4
adjusting the shutter (5 fig. 16):
MAX power
PAR 1
CO
(Methane)
2
9,0 ±0,3
4) Press the button for a few seconds
69
5) Identify the CO
adjusting the OFF-SET regulation screw
(6 fig. 16):
MIN power
71
CO
(Methane)
5
2
9,0 ±0,3
6) Press the buttons several times to
5
check the pressures
ge them if required.
1
7) Press the button
the function.
1
2
4.5
MAINTENANCE (fig. 20)
2
To guarantee functioning and efficiency of
the appliance, in respect of the legal pro-
visions in force, it must be regularly che-
3
.
cked; the frequency of the checks depends
on the type of appliance and the installation
and usage conditions.
4
Fig. 17
5
CO
(Propane)
2
10,2 ±0,3
3
.
1
values at min. power by
2
2
CO
(Propane)
5
2
4
10,2 ±0,3
3
3
and
chan-
1
3
once more to quit
2
4
4
4
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