Service And Maintenance; System Startup - Ferroli DIVAtop MICRO LN 24 C Instrucciones De Uso, Instalación Y Mantenimiento

DIVAtop MICRO LN C

4. SERVICE AND MAINTENANCE

All adjustment, conversion, startup and maintenance operations described below must
only be carried out by Qualified Personnel (meeting the professional technical require-
ments prescribed by current regulations) such as those of the Local After-Sales Tech-
nical Service.
FERROLI declines any liability for damage and/or injury caused by unqualified and un-
authorised persons tampering with the unit.
4.1 Adjustments
Gas conversion
The unit can operate on natural gas or LPG and is factory-set for use with one of these
two gases, as clearly shown on the packing and on the dataplate. Whenever a different
gas to that for which the unit is preset has to be used, a conversion kit will be required,
proceeding as follows:
1. Replace the nozzles at the main burner, fitting the nozzles specified in the technical
data table in , accordingsec. 5.2 to the type of gas used
2. Modify the parameter for the type of gas:
• put the boiler in standby mode
• Press the RESET button (detail 8 - fig. 1) for 10 seconds: the display shows
"TS" flashing
• press the RESET button (detail 8 - fig. 1): the display shows "P01.
• Press the DHW buttons (details 01 and 00 - fig. 1) to set parameter 1 (for nat-
ural gas) or 2 (for LPG).
• Press the RESET button (detail 8 - fig. 1) for 10 seconds.
• the boiler will return to standby mode
3. Adjust the minimum and maximum pressures at the burner (ref. relevant para-
graph), setting the values given in the technical data table for the type of gas used
4. Apply the sticker contained in the conversion kit, near the dataplate as proof of the
conversion.
TEST mode activation
Press the heating buttons (details 3 and 4 -fig. 1) at the same time for 5 seconds to
activate the TEST mode. The boiler lights at the maximum heating power set as de-
scribed in the following section.
The heating symbol (detail 24 - fig. 1) and DHW symbol (detail 12 - fig. 1) flash on the
display; the heating power and lighting power will be displayed alongside.
fig. 20 - TEST mode (heating power = 100%)
To deactivate the TEST mode, repeat the activation sequence.
The TEST mode is automatically disabled in any case after 15 minutes.
Pressure adjustment at the burner
Since this unit has flame modulation, there are two fixed pressure settings: 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.
• Remove the protection cap "D".
• Operate the boiler in TEST mode.
• Adjust the maximum pressure setting by turning the screw "G" clockwise to in-
crease the pressure and anticlockwise 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 the modureg "F" on the gas valve
• Check that the maximum pressure has not changed
• Refit the protection cap "D.
• To end the TEST mode, repeat the activation sequence or wait 15 minutes.
After checking or adjusting the pressure, make sure to seal the adjust-
A
ment screw with paint or a specific seal.
eco
bar
cod. 3540S351 - Rev. 01 - 02/2015
F I
R
A
B
fig. 21 - Gas valve
to Pressure point upstream
B Pressure point downstream
C Modureg electrical connection
D Protective cap
E Minimum pressure adjustment
F Modureg
G Minimum pressure adjustment
I Gas valve electrical connection
M Pressure gauge
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 (details 3 and 4 - 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 (details 1 and 2 - fig. 1) to increase or decrease the power (min. = 00 -
max. = 60). Press the RESET button within 5 seconds and the ignition powerwill remain
that just set. Exit TEST mode (see sec. 4.1).
4.2 System start-up
B
Checks to be made at first ignition, and after all maintenance operations that
involved disconnecting from the systems or an intervention on safety devices
or parts of the boiler:
Before lighting the boiler
• Open any on-off valves between the boiler and the systems.
• Check the tightness of the gas system, proceeding with caution and using a soap
and water solution to detect any leaks in connections.
• Check the correct preloading of the expansion tank (ref. sec. 5.2)
• Fill the water system and make sure that all air contained in the boiler and the sys-
tem has been vented by opening the air vent valve on the boiler and any vent valves
on the system.
• Make sure there are no water leaks in the system, hot water circuits, connections or
boiler.
• Check the correct connection of the electric system and the functioning of the earth
system. l
• Check that the gas pressure value for heating is as required.
• Make sure there are no flammable liquids or materials in the immediate vicinity of
the boiler
Checks during operation
• Ignite the appliance as described in sec. 2.3.
• Check the airtightness of the fuel circuit and water systems.
• Check the efficiency of the flue and air-fume ducts while the boiler is working.
• Check that the water is circulating properly between the boiler and the systems.
• Make sure that the gas valve modulates correctly in both the heating and hot water
production phases.
• Check the proper ignition of the boiler by performing various tests, turning it on and
off with the room thermostat or remote control.
• Make sure that the fuel consumption indicated on the meter corresponds to that giv-
en in the technical data table in sec. 5.2.
• Make sure that with no call for heating the burner correctly ignites on opening a hot
water tap. Check that during heating operation, on opening a hot water tap, the heat-
ing circulator stops and there is a regular production of hot water.
• Check the parameters are programmed correctly and perform any required custom-
ization (compensation curve, power, temperatures, etc.)
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