Green Heating Technology
22
SERVICE
Manual
City Class F-FR
Gas valve
GAS VALVE
TOOLS
tools suggested:
screw - nut
CALIBRATION
•
Outlet pressure: Values written on User manual (1)
•
Inlet pressure: Net pressure must be: 20 mbar – MTN / 29- 37 mbar - LPG (2)
•
Vent Connection: Pressure compensation on sealed chamber (3)
•
Coil modulator wires: MTN = 20 – 120 mA / LPG = 30 – 165 mA
•
Disconnect one to force boiler on minimum value set ( 4)
•
Minimum adjustment: Use the screw to set the minimum value (respecting the data on User
manual) (A)
•
Maximum adjustment: Use the nut (10 mm) to set the maximum value (respecting the data
on User manual) (B)
•
Protection cup: After any adjustments, mount the protection cup (C)
F FR
Gas supply pressure
Nominal pressure
mbar
20
37
20
37
20
37
20
37
Inlet pressure (min÷max)
mbar
17 ÷ 25
35÷40
17 ÷ 25
35÷40
17 ÷ 25
35÷40
17 ÷ 25
35÷40
Injectors number
9
11
13
15
Injectors diameter
mm/100
130
78
130
78
130
77
130
78
Gas pressure to injectors at
Qn (MAX)
mbar
12.4
27.8 / 35.7
13.0
27.5 / 35.6
12.8
27.7 / 35.8
12.6
27.4 / 35.4
Gas pressure to injectors at
Qr (MIN)
mbar
2.4
6.5 / 6.5
1.9
4.9 / 4.9
1.9
6.5 / 6.5
1.7
6.5 / 3.9