Sime FORMAT DGT 30e - Use and Maintenance; Gas Valve Description; Gas Conversion Process; New Fuel Configuration

30
6.4.1 GAS VALVE
The boilers are equipped standard with
theSIT845SIGMAgasvalve(fig.22).
The gas valve is set at two pressure
values:maximumandminimum.
Accordingtothetypeofgasburnt,these
correspondto thevaluesgiven inTable
4.
The gas pressures at the maximum
and minimum values, are factory set.
Consequentlytheymustnotbealtered.
The gas valve will require resetting on
conversion to another gas(Natural gas
toLPG).

6.4.2 GAS CONVERSION
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opera-
tions(fig.23):
– Close the gas cock and isolate the
boilerselectricalsupply.
– Disassembletheburnermanifold(3).
– Replacethemainnozzles(6)supplied
in a kit, inserting the copper washer
(4).Useaø7spannertoperformthis
operation.
– Configurethenewfuelasindicatedin
point6.4.2.1
– For calibrating the maximum and
minimum gas pressure values, see
point6.4.2.2.
–Fixthelabeltothedataplateshowing
theNewgasconfiguration.
NOTE: Ensure that on reassembly all
seals are replaced as require, and the
tightness tested, using a suitable leak
detection fluid.
6.4.2.1 New fuel configuration
Accesstheparameterssectionbypres-
singthecontrolpanelkeys(
1
2
3
4
and
1
2
3
4
)
atthesametimefor5secon-
ds.
The red LED flashes and the display
shows:
Scrolltheparametersusing
1
2
3
4
or
1
2
3
4
.
To enter the fuelconfigura-
tionparamaterPAR01,use
1
2
3
4
or
1
2
3
4
.
Thesetvalueflashesandif
theboilerinquestionisa30withmetha-
ne,thedisplayshows:
6.4 USE AND MAINTENANCE
3
4
2
1
5
6
Fig.23
KEY
 1 Swivelconnection1/2”
 2 Locknut1/2”
 3 Burnermanifold
 4 Washerø6.1
 5 Burners
 6 NozzleM6
 7 Screw
WARNING: To ensure a perfect
seal, always use the washer (4)
supplied in the kit when repla-
cing nozzles, even in burner
units for which it is not speci-
fied.
Fig.22
KEY
1 Modulator
2 EV1-EV2coils
3 Pressureinletupstream
4 Pressureinletdownstream
5 VENTpressure
TABLE 4
Output BurnerpressurekPa ModulatorcurrentmA
 NG  LPG NG  LPG
Maximum 0,85  2,50 130  165
Minimum 0,04  0,33 0  0
1
2
3
4
1
2
3
4