Ferroli ECONCEPT TECH 25 A Instrucciones De Uso página 32

4. SERVICE AND MAINTENANCE
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 arranged has to be used, a conversion kit will be required, proceeding as follows:
1. Remove the casing.
2. Open the sealed chamber.
3. Release the fixing clip C and remove gas pipe A from the fan - venturi assembly.
4. Replace nozzle B, inserted in the gas pipe, with that contained in the conversion kit.
5. Reassemble gas pipe A with the clip and check the seal of the connection.
6. Apply the label, contained in the conversion kit, near the dataplate.
7. Refit the sealed chamber and casing.
8. Modify the parameter for the type of gas:
• put the boiler in standby mode
• press the DHW buttons detail 1 - fig. 70 for 10 seconds: the display shows "P01" flash-
ing.
• press the DHW buttons detail 1 - fig. 70 to set parameter 00 (for use with natural gas)
or 01 (for use with LPG).
• press the DHW buttons detail 1 - fig. 70 for 10 seconds.
• the boiler will return to standby mode
9. Using a combustion analyser connected to the boiler fume outlet, check that the CO2 content
in the fumes, with the boiler operating at max. and min. output, matches that given in the tech-
nical data table for the corresponding type of gas.
fig. 17 - Gas conversion
TEST mode activation
Press the heating buttons (detail 3 - fig. 70) at the same time for 5 seconds to activate the TEST
mode. The boiler lights at the maximum heating power set as described in the following section.
The heating and DHW symbols (fig. 87) flash on the display; the heating power will be displayed
alongside.
fig. 18 - TEST mode (heating power = 100%)
Press the heating buttons (detail 3 - fig. 70) to increase or decrease the power (Min.=0%,
Max.=100%).
Press the DHW button "-" (detail 1 - fig. 70) and boiler power is immediately adjusted to min. (0%).
Press the DHW button "+" (detail 1 - fig. 70) and boiler power is immediately adjusted to max.
(100%).
If the TEST mode is activated and enough hot water is drawn to activate the DHW mode, the boiler
remains in TEST mode but the 3-way valve goes to DHW.
To deactivate the TEST mode, repeat the activation sequence.
The TEST mode is automatically disabled in any case after 15 minutes or on stopping of hot water
drawing (if enough hot water was drawn to activate DHW mode).
32
EN
ECONCEPT TECH 25 A - 35 A
Heating power adjustment
To adjust the heating power, switch the boiler to TEST mode (see sec. 19.1). Press the heating
buttons detail 3 - fig. 70 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. 19.1).
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.
• Check the correct tightness and efficiency of the condensate removal system and
trap.
• Make sure the water is circulating properly between the boiler and systems.
• Make sure the gas valve modulates correctly in heating and domestic hot water pro-
duction.
• Check proper lighting of the boiler by turning it on and off several times with the room
thermostat or remote control.
• Make sure the fuel consumption indicated on the meter matches that given in the
technical data table on cap. 20.
• Make sure that with no heating demand the burner correctly lights on opening a hot
water tap. Check that the heating circulating pump stops on opening a hot water tap
during heating operation and there is a regular production of hot water.
• Check correct programming of the parameters and carry out any required customi-
sation (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.
• The sealed chamber must be tight.
• 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 to clean.
• The electrode must be properly positioned and free of scale.
• The gas and water systems must be tight.
• The water pressure with system 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.
• The condensate removal system must be efficient, with no leaks or obstructions.
4.4 Troubleshooting
Diagnostics
In case of operation faults or problems, the display flashes and the fault identification
code appears.
There are faults that cause permanent shutdown (marked with the letter "A"): to restore
operation just press the reset button (detail 6 -fig. 70) for 1 second or RESET on the op-
tional remote timer control if installed; if the boiler fails to start, it is necessary to firstly
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.
cod. 3540R802 - 07/2012 (Rev. 00)