19
4 .1
GAS VALVE 16)
The boiler is equipped with an SIT 822
NOVAMIX gas valve (fig. 16).
4 .2
CHANGEOVER TO A DIFFERENT
GAS SUPPLY (fig . 17)
This must only be done by an author-
ised technician using original Sime parts .
Failure to do so voids the warranty .
To change over from methane to LPG or
vice-versa, proceed as follows:
– Close the gas valve.
– Replace the nozzle with its O-ring (1) and
gasket (2) with the one provided in the
changeover kit.
– Check all gas connections with soapy
water or a testing product. Do not use
open flames.
– Affix the label indicating the new gas type.
– Set the max/min gas valve pressures as
indicated in par. 4.2.2.
4 .2 .1 Configuring the new gas supply
To access the installer parameters, hold
down the buttons (
5
3
1
2
4
and
5
3
1
2
4
) together for
5 seconds (3 fig. 12).
Modify the values of parameters with the
buttons (
5
3
1
2
4
and
5
3
1
2
4
).
The control panel display will show PAR 1.
If the gas is currently methane (G20),
SET
68
will display.
To change it to propane (G31), set
SET 70
by
pressing the button (
5
3
1
2
4
) repeatedly.
The standard display
is automatically restored after 10 seconds.
The following table indicates the setpoints
(SET) to be used in all versions when
changing the gas type.
GAS
BOILER
PAR 1
METHANE
(G20)
110 BOX ErP
68
PROPANE
(G31)
110 BOX ErP
70
4 .2 .2 Calibrating the gas valve pressures
Check the CO
2
values with a gas tester.
Procedure:
1)
Hold the button (
5
3
1
2
4
) down for a few
seconds.
2)
Hold the button (
5
3
1
2
4
) down for a few
seconds to set the boiler to maximum
power.
3)
Find the CO2 values at maximum power
given below with the splitter (5 fig. 16):
4)
Hold the button (
5
3
1
2
4
) down for a few
seconds.
5)
Find the CO2 values at minimum power
given below with the OFF-SET screw (6
fig. 16):
6)
Press the buttons (
5
3
1
2
4
and
5
3
1
2
4
) repeat-
edly to check the pressures; correct
them if necessary.
7)
Press the button (
5
3
1
2
4
) again to quit the
function.
4 .5
MAINTENANCE (fig . 20)
To ensure that the appliance works proper-
ly, it must be inspected and tested regular-
ly, as required by the law; the frequency of
such checks depends on the type of appli-
ance, its installation and its use.
It should in any case be checked at least
once a year by an Authorised Technical
Service Centre.
During maintenance operations, the
Authorised Technical Service Centre must
check that the drip siphon is full of water
(especially if the boiler has not been used
for a long time) .
It can be filled via the provided intake
(fig . 20) .
4 USE AND MAINTENANCE
EV1
EV2
1
2
5
6
Fig. 16
KEY
1 Upline pressure fitting
2 Downline pressure fitting
5 Splitter
6 OFF-SET
MAX power
CO
2
(Methane)
CO
2
(Propane)
9.0 ±0.2
10.2 ±0.3
MIN power
CO
2
(Methane)
CO
2
(Propane)
9.0 ±0.2
10.2 ±0.3
2
1
Fig. 17
WARNING: Before working on the boiler in any way, make sure that
it and its components have cooled down and no longer pose a burn
hazard due to their high temperature .
Summary of Contents for MURELLE 110 BOX ErP
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