Supplied By www.heating spares.co Tel. 0161 620 6677
32
DOMINA PLUS F 24 - 30 E
FERELLA EXTRA F 24 - 30 MEL
Version - 09.2002
3.2 Operating diagram
Hot water taps closed
Flow meter off
Heating delay of 2 min. performed
System pressure > 0.8 bar
Boiler on stand-by "LED 5 ON"
Room thermostat, heating potentiometer on call
Heating required "LED 4 ON"
Heating circulator comes on
Heating and tap water sensor enabling signal (NTC 10 Kohm at 25°C)
Air pressure switch "NO" contact open, fan starts
Intake and outlet ducts open, resistance under table limit.
Pressure difference at air pressure switch >180 Pascal (18.00 mm approx.)
Air pressure switch "NO" contact closed
100°C safety thermostat enabling signal
Electric discharge to ignition electrode
Continuous voltage of 230V to the gas valve operators
Main burner ignition
Flame detection at ionization electrode within 10 sec. (safety time)
End of electric discharge.
Ionization working range
- 1 micro Ampere minimum for safety
- 2/3 micro Ampere minimum for working
Ignition gas adjustment (natural gas or LPG) with appropriate parameter.
Hot water taps closed
Boiler on "SUMMER"
Boiler on
Electrical power supply on card 230V
Fuse OK
System pressure >0.8 bar
Boiler on stand-by "LED 5 ON"
Hot water tap opens 2.5 l/min
Flow meter enabling signal
Hot tap water required "LED 3 ON"
Heating temperature adjustment trips; burner and
fan switch off.
The circulator is working "LED 4 blinking" according
to the dedicated parameter.
At the end of the 2 min delay, the burner re-ignites
when required.
Room thermostat trips on reaching the set
temperature.
Boiler in post-circulation "LED 4 blinking"
Heating circulator operates for 6 min.
(post-circulation).
Closing hot water tap, switching off burner.
End of requirement for hot tap water
"LED 3 OFF"
Stand-by after hot tap water operation
"LED 4 blinking"
Delay before starting heating of 2 min.
SUMMER (tap water)
WINTER (heating)
Hot water taps closed
Flow meter off
Heating delay of 2 min. performed
System pressure > 0.8 bar
Boiler on stand-by "LED 5 ON"
Room thermostat, heating potentiometer on call
Heating required "LED 4 ON"
Heating circulator comes on
Heating and tap water sensor enabling signal (NTC 10 Kohm at 25°C)
Air pressure switch "NO" contact open, fan starts
Intake and outlet ducts open, resistance under table limit.
Pressure difference at air pressure switch >180 Pascal (18.00 mm approx.)
Air pressure switch "NO" contact closed
100°C safety thermostat enabling signal
Electric discharge to ignition electrode
Continuous voltage of 230V to the gas valve operators
Main burner ignition
Flame detection at ionization electrode within 10 sec. (safety time)
End of electric discharge.
Ionization working range
- 1 micro Ampere minimum for safety
- 2/3 micro Ampere minimum for working
Ignition gas adjustment (natural gas or LPG) with appropriate parameter.
Hot water taps closed
Boiler on "SUMMER"
Boiler on
Electrical power supply on card 230V
Fuse OK
System pressure >0.8 bar
Boiler on stand-by "LED 5 ON"
Hot water tap opens 2.5 l/min
Flow meter enabling signal
Hot tap water required "LED 3 ON"
Heating temperature adjustment trips; burner and
fan switch off.
The circulator is working "LED 4 blinking" according
to the dedicated parameter.
At the end of the 2 min delay, the burner re-ignites
when required.
Room thermostat trips on reaching the set
temperature.
Boiler in post-circulation "LED 4 blinking"
Heating circulator operates for 6 min.
(post-circulation).
Closing hot water tap, switching off burner.
End of requirement for hot tap water
"LED 3 OFF"
Stand-by after hot tap water operation
"LED 4 blinking"
Delay before starting heating of 2 min.
SUMMER (tap water)
WINTER (heating)