Ferroli SIGMA Installation And Servicing Instructions page 4

1 03 Technical data
Heat
output
Model
Max
kW
Sigma 20/40 11,7
Sigma 40/60 17,6
Gas supply pressures
Model
G20-NG
Sigma 20/40
Sigma 40/60
Model
Flow
1
Ø
Sigma 20/40 22
Sigma 40/60 22
Maximum working temperature 82°C, adjustable between 60°C and 82°C.
Heat
input
(net)
Min Max Min
kW kW kW
5,5 13,0 6,1
11,4 19,5 12,7
G31-LPG
mbar mbar
20 37
20 37
Max. working
Connections
Return Gas inlet
2 3
Ø Ø
22 15
22 15
Sigma
Heat
input
(gross)
G20-NG
Max Min
Ø
kW kW
14,4 6,8 3,0
21,7 14,1 3,60
Burner gas pressures
G20-NG
Minimum
mbar
3,1
6,4
pressure Protection
C.H.circuit level
bar
3 IP 40
3 IP 40
Injectors
(mm)
G20 m
G31-LPG
Ø Max
1,8 1,37
2,30 2,06
Nominal Minimum
mbar mbar
14,0 9,0
15,3 16,0
Boiler
water
Weight
contents
kg litres
30 1,3
35 1,6
Gas flow rates
3
/h-NG G31 kg/h-LPG
Min Max Min
0,64 1,02 0,48
1,34 1,53 0,99
G31-LPG
Nominal
mbar
36
36
Gas valve
Ø 1/2"
Honeywell
VK 4105 A
VK 4105 A