Ferroli DIVAtop F 24 Instructions For Use, Installation And Maintenance page 20

Adjustment of pressure at burner
Since this unit has flame modulation, there are two fixed pressure values: minimum and maximum, which must be those
given in the technical data table according to the type of gas.
• Connect a suitable pressure gauge to the pressure point "B" downstream of the gas valve.
• Disconnect the pressure compensation tube "N".
• Remove the protection cap "D".
• Operate the boiler in TESTfig. 1 mode.
Adjust the maximum pressure setting by turning the screw "G" clockwise to increase the pressure and anticlock-
•
wise to decrease it.
• Disconnect one of the two fastons "C" from modureg "F" on the gas valve.
• Adjust the minimum pressure setting by turning the screw "E" clockwise to increase the pressure and anticlockwise
to decrease it.
• Turn the burner on and off, checking that the minimum pressure value remains stable.
• Reconnect the faston "C" detached from modureg "F" on the gas valve
• Check that the maximum pressure has not changed
Reconnect the pressure compensation tube "N".
•
• Refit the protection cap "D".
• To end the TEST mode, repeat the activation sequence or wait 15 minutes.
After checking or adjusting the pressure, seal the adjustment screw with paint or a suitable seal.
A
A Pressure point upstream
B Pressure point downstream
C
Modureg electrical connection
D Protection cap
E Minimum pressure adjustment
F Modureg
G
Minimum pressure adjustment
20
H F I
R
B A
L
N
fig. 27 - Gas valve
cod. 3540E821 - 11/2008 (Rev. 00)
DIVAtop F 24
D
E
G
S
C
F
+
M
B
H Compensation tube connection
I Gas valve electrical connection
L
Sealed chamber
M Pressure gauge
N Compensation tube
R Gas outlet
S
Gas inlet
EN