Sime Planet 25 BF, Installer'S Instructions

Page: 126 / 140

122
4.4 ADJUSTMENT OF HEAT
OUTPUT FOR HEATING
To adjust boiler heat output for heating pur-
poses, i.e., modifying the setting made at the
factory which is approximately 16 kW, use a
screwdriver to adjust the heating heat out-
put trimmer (10 fig. 25).
To increase working pressure, turn the trim-
mer clockwise; to reduce pressure, turn the
trimmer counterclockwise.
To facilitate the operations of adjusting heat
output, see the pressure/heat output dia-
grams for natural gas (methane) and buta-
ne or propane gas (figg. 30 - 30/a - 30/b).
4.5 GAS CONVERSION
A kit is supplied complete with the necessary
change-over materials for operation with
butane gas (G30) or propane gas (G31).
Operate in the following manner for chan-
ging over from one gas to another (fig. 31):
–Close the gas cock.
–Slide out the burner unit.
–Replace the main nozzles delivered with
the kit (6), inserting the copper washer
(4). Use a ø 7 spanner to perform this
operation.
–Insert the "GPL-MET" connector link on
the card and set it on "GPL” (7 fig. 25).
–To set the values of maximum and mini-
mum gas pressure, follow the instruc-
tions given in section 4.3, according to
the type of gas valve used.
When the working pressures have
been adjusted, reseal the regulators.
–After have ultimated the conversion of
the boiler, please stick onto the casing
panel the plate showing the relevant fee-
ding gas which is included into the conver-
sion kit.
NOTE: After assembling all the gas con-
nections, a test for gas tightness must be
carried out using soapy water or special
products. Do not use naked flames.
25
20
15
10
8,1 (7.000) 11,6 (10.000) 17,4 (15.000) 23,2 (20.000)
POTENZA TERMICA kW (kcal/h)
PRESSIONE UGELL
O mbar
30
35
5
29,0 (25.000)
25 30
11
10
9
8
7
6
5
4
3
2
1
8,1 (7.000) 11,6 (10.000) 17,4 (15.000) 23,2 (20.000)
POTENZA TERMICA kW (kcal/h)
PRESSIONE UGELL
O mbar
29,0 (25.000)
25
30
25
20
15
10
8,1 (7.000) 11,6 (10.000) 17,4 (15.000) 23,2 (20.000)
POTENZA TERMICA kW (kcal/h)
PRESSIONE UGELL
O mbar
30
5
29,0 (25.000)
25 30
Fig. 30
Pressure/heat output diagram for natural gas (G20)
Pressure/heat output diagram for butane gas (G30)
Pressure/heat output diagram for propane gas (G31)
Fig. 30/a
Fig. 30/b Fig. 31
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
HEAT OUTPUT kW (kcal/h)
N
OZZLE
PRESSURE
mbar
HEAT OUTPUT kW (kcal/h)
HEAT OUTPUT kW (kcal/h)
N
OZZLE
PRESSURE
mbar
N
OZZLE
PRESSURE
mbar
WARNING: To ensure a perfect seal,
always use the washer (4) supplied in the
kit when replacing nozzles, even in burner
units for which it is not specified.