Ferroli DOMItech F 24 Instructions For Use, Installation And Maintenance - page 33
DOMItech F 24 - F 32
33
EN
cod. 3540R832 - 0
/201 (Rev. 00)
fig. 15 - Gas valve
A
Upstream pressure point
B
Downstream pressure point
C
Modureg electrical connection
D
Protection cap
E
Minimum pressure adjustment
F
Modureg
G
Minimum pressure adjustment
H
Compensation tube connection
I
Gas valve electrical connection
L
Sealed chamber
M
Pressure gauge
N
Compensation tube
R
Gas outlet
S
Gas inlet
Heating power adjustment
To adjust the heating power, switch the boiler to TEST mode (see sec. 4.1). Press the
heating buttons detail 3 - fig. 1 to increase or decrease the power (min. = 00 - max. =
100). Press the reset button within 5 seconds and the max. power will remain that just
set. Exit TEST mode (see sec. 4.1).
Lighting power adjustment
To adjust the lighting power, switch the boiler to TEST mode (see sec. 4.1). Press the
DHW buttons (detail 1 - fig. 1) to increase or decrease the power (min. = 00 - max. = 60).
Press the reset
button within 5 seconds and the lighting power will remain that just
set. Exit TEST mode (see sec. 4.1).
4.2 Startup
Before lighting the boiler
•
Check the seal of the gas system.
•
Check correct prefilling of the expansion tank.
•
Fill the water system and make sure all air contained in the boiler and the system
has been vented.
•
Make sure there are no water leaks in the system, DHW circuits, connections or boil-
er.
•
Check correct connection of the electrical system and efficiency of the earthing sys-
tem.
•
Make sure the gas pressure for heating is that required.
•
Make sure there are no flammable liquids or materials in the immediate vicinity of
the boiler
Checks during operation
•
Switch the unit on.
•
Check the tightness of the fuel circuit and water systems.
•
Check the efficiency of the flue and air/fume ducts while the boiler is working.
•
Make sure the water is circulating properly between the boiler and the systems.
•
Make sure the gas valve modulates correctly in the heating and domestic hot water
production stages.
•
Check correct boiler lighting by performing various tests, turning it on and off with
the room thermostat or remote control.
•
Make sure the fuel consumption indicated on the meter matches that given in the
technical data table in cap. 5.
•
Make sure that with no demand for heating, the burner lights correctly on opening a
hot water tap. Check that in heating mode, on opening a hot water tap, the heating
circulating pump stops and there is regular production of hot water.
•
Make sure the parameters are programmed correctly and carry out any required
customisation (compensation curve, power, temperatures, etc.).
4.3 Maintenance
Periodical check
To ensure correct operation of the unit over time, have qualified personnel carry out a
yearly check, providing for the following:
•
The control and safety devices (gas valve, flow meter, thermostats, etc.) must func-
tion correctly.
•
The fume exhaust circuit must be perfectly efficient.
(Sealed chamber boiler: fan, pressure switch, etc. -The sealed chamber must be
tight: seals, cable glands, etc.)
(Open chamber boiler: anti-backflow device, fume thermostat, etc.)
•
The air/fume terminal and ducts must be free of obstructions and leaks
•
The burner and exchanger must be clean and free of deposits. Do not use chemical
products or wire brushes for cleaning.
•
The electrode must be free of scale and properly positioned.
•
The gas and water systems must be tight.
•
The water pressure in the system when cold must be approx. 1 bar; otherwise bring
it to that value.
•
The circulating pump must not be blocked.
•
The expansion tank must be filled.
•
The gas flow and pressure must match that given in the respective tables.
4.4 Troubleshooting
Diagnostics
The boiler is equipped with an advanced self-diagnosis system. In case of a boiler fault, the
display will flash together with the fault symbol (detail 11 - fig. 1) indicating the fault code.
There are faults that cause permanent shutdown (marked with the letter "A"): to restore
operation, press the RESET button (detail 6 - fig. 1) for 1 second or RESET on the op-
tional remote timer control if installed; if the boiler fails to start, it is necessary to eliminate
the fault.
Faults marked with the letter "F" cause temporary shutdowns that are automatically reset
as soon as the value returns within the boiler's normal working range.
Table of faults
Table. 8 - Fault list
F
H
I
B A
R
+
B
D
E
G
C
F
M
N
L
S
Fault
code
Fault
Possible cause
Cure
A01
No burner ignition
No gas
Check the regular gas flow to the
boiler and that the air has been
eliminated from the pipes
Ignition/detection electrode fault
Check the wiring of the electrode
and that it is correctly positioned and
free of any deposits
Faulty gas valve
Check the gas valve and replace it if
necessary
Ignition power too low
Adjust the ignition power
A02
Flame present signal with
burner off
Electrode fault
Check the ionisation electrode
wiring
Card fault
Check the card
A03
Overtemperature protection
activation
Heating sensor damaged
Check the correct positioning and
operation of the heating sensor
No water circulation in the
system
Check the circulating pump
Air in the system
Vent the system
F05
Air pressure switch (fails to
close contacts within 20 sec.
of fan activation)
Air pressure switch contact open
Check the pressure switch / Fan /
Fan socket
Faulty air pressure switch wiring
Check the wiring
Faulty baffle
Make sure the baffle is correct
Flue not correctly sized or
obstructed
Check the length of the flues / Clean
the flues
A06
No flame after the ignition
stage
Low pressure in the gas system
Check the gas pressure
Burner minimum pressure set-
ting
Check the gas pressures
F10
Delivery sensor 1 fault
Sensor damaged
Check the wiring or replace the
sensor
Wiring shorted
Wiring disconnected