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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).
4
3
2
1
KEY
1
Upstream pressure intake
2
Intermediate pressure intake
3
Air signal inlet (VENT)
4
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 gasket OR (1) 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
For access to the installer's parameters,
press simultaneously keys
and
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
parameter PAR 1. If the boiler is a methane
(G20) model, SET 6 will be displayed:
To change the fuel to propane (G31), it is
5
6
Fig. 16
necessary to set SET 14, by pressing the
key
.
The standard display will automatically
return after 10 seconds.
The table below shows the SET settings to
enter when the type of gas fuel is changed.
GAS
METHANE
(G 20)
PROPANE
for
(G 31)
4.2.2
Calibrating the gas valve
pressures
Measure the CO
2
analyzer.
Sequence of operations:
1) Press and hold the button down for a
few seconds
2) Press the button for a few seconds
3) Identify the CO
4) Press the button for a few seconds
5) Identify the CO
MODEL
PAR 1
100 BOX
6
150 BOX
6) Press the buttons several times to
100 BOX
14
150 BOX
7) Press the button
4.5
To guarantee functioning and efficiency of
the appliance, in respect of the legal provi-
values with a combustion
sions in force, it must be regularly checked;
the frequency of the checks depends on
the type of appliance and the installation
and usage conditions.
In any case, it should be inspected at least
.
once a year by a qualified technician.
1
values at max. power by
2
adjusting the shutter (5 fig. 16):
MAX power
CO
(Methane)
CO
(Propane)
2
2
9,2 ±0,2
10,3 ±0,3
values at min. power by
2
adjusting the OFF-SET regulation screw
(6 fig. 16):
MIN power
CO
(Methane)
CO
(Propane)
2
2
9,5 ±0,2
10,0 ±0,3
check the pressures
and
ge them if required.
once more to quit
the function.
MAINTENANCE (fig. 20)
ES
ENG
FR
Fig. 17
.
.
chan-
55
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