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3
SECTION 2
TECHNICAL DATA
2.1 Central heating
Syntesi 25
Syntesi 29
Syntesi 35
Heat input
25.0 kW
29.0 kW
35.0 kW
Max heat output 60/80
°
C (return & flow temp.)
24.1 kW
28.0 kW
33.9 kW
Max heat output 30/50
°
C (return & flow temp.)
25.9 kW
29.7 kW
36.2 kW
Min heat output 60/80
°
C (return & flow temp.)
9.5 kW
9.5 kW
9.4 kW
Min heat output 30/50
°
C (return & flow temp.)
10.1 kW
10.2 kW
10.2 kW
Minimum working pressure
0.45 bar
Maximum working pressure
3.0 bar
Minimum flow rate
350 l/h
2.2 Domestic hot water
Maximum input
25.0 kW
29.0 kW
35.0 kW
Maximum output
24.1 kW
28.0 kW
33.9 kW
Minimum output
9.5 kW
9.5 kW
9.4 kW
Flow rate (35
o
C rise)
9.9 kW
11.5 kW
13.9 kW
Maximum inlet pressure
6.0 bar
Minimum inlet pressure
0.15 bar
Minimum flow rate
2.0 l/min
2.3 Gas pressures
Inlet pressure (G20)
20.0 mbar
Burner pressure maximum
8.8 mbar
9.3 mbar
10.1 mbar
Burner pressure minimum
1.5 mbar
1.25 mbar
1.00 mbar
Maximum gas rate
2.65 Sm
3
/h
3.07 Sm
3
/h
3.75 Sm
3
/h
Minimum gas rate
1.05 Sm
3
/h
1.05 Sm
3
/h
1.05 Sm
3
/h
Injector size (quantity)
12 x 1.35 mm
14 x 1.35 mm
16 x 1.35 mm
2.4 Expansion vessel
Capacity
8-litres
10-litres
Maximum system volume
76-litres
91-litres
Pre-charge pressure
1.0 bar
2.5 Dimensions
Height
820mm
Width
400mm
450mm
500mm
Depth
350mm
Dry weight (kg)
44.0
45.0
48.0
2.6 Clearances
Sides
12mm
Top
150mm from casing or 25mm above flue elbow (whichever is applicable)
Bottom
150mm
Front
600mm
2.7 Connections
Flow & return
22mm
Hot & cold water
15mm
Gas
15mm
Safety valve
15mm
Condense
21mm
2.8 Electrical
Voltage (V/Hz)
230/50
Power consumption
174W
174W
194W
Internal fuse
2A
External fuse
3A
2.9 Flue details (concentric)
Maximum horizontal flue length (60/100mm)
5.75m
4.90m
0.75m
Maximum vertical flue length (60/100mm)
6.55m
5.70m
1.55m
Maximum horizontal flue length (80/125mm)
13.80m
11.80m
6.75m
Maximum vertical flue length (80/125mm)
15.30m
13.30m
8.25m
2.9A Flue Details (twin pipes)
Maximum horizontal flue length (80mm + 80mm)
25m+25m
20m+20m
10m+10m
Maximum vertical flue length (80mm + 80mm)
25m+25m
20m+20m
10m+10m
2.10 Efficiency
SEDBUK (%)
87.4
87.5
88.1