Ferroli i25 Instructions For Use, Installation And Maintenance - I25 / I29
i25 / i29
9
EN
cod. 3541I730 - Rev. 02 - 11/2016
Adjustment of pressure at the burner
Since this unit has flame modulation, there are two fixed pressure values: the minimum and max-
imum, which must be those given in the technical data table according to the type of gas.
•
Connect a suitable pressure gauge to pressure point “B” located downstream of the gas
valve
•
Remove the protection cap “D” undoing screw “A”.
•
Operate the boiler in TEST mode.
•
Adjust the power to the max. value.
•
Adjust the max. pressure with screw "G", clockwise to increase the pressure and anticlock-
wise to decrease it
•
Disconnect one of the two Faston connectors from the modureg "C" on the gas valve.
•
Adjust the min. pressure with screw "E", clockwise to decrease the pressure and anticlock-
wise to increase it.
•
Reconnect the Faston connector detached from the modureg on the gas valve.
•
Check that the maximum pressure has not changed.
•
Refit protection cap “D”.
•
To end the TEST mode repeat the activation sequence or wait 15 minutes.
A
After checking or adjusting the pressure, make sure to seal the adjust-
ment screw with paint or a specific seal.
fig. 21 - Gas valve
A - Protection cap screw
B - Pressure point downstream
C - Modureg cable
D - Protection cap
E - Min. pressure adjustment
G - Max. pressure adjustment
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).
Measure the gas rate
Measure the gas rate and check against following table:
4.4 Routine servicing, maintenance & repair
General
PLEASE NOTE: During routine servicing, and after any maintenance or change of part
of the combustion circuit, we recommend that the following is checked:
•
The integrity of the flue system and the flue seals;
•
The integrity of the boiler combustion circuit and the relevant seals;
•
The operational (working) gas inlet pressure at maximum rate, as described in
section 4.4;
•
The gas rate, as described in section 4.4;
•
The combustion performance, as described in section 3.4 Combustion check.
Competence to carry out the check of combustion performance
PLEASE NOTE: BS 6798: 2009 Specification for installation and maintenance of
gas-fired boilers of rated input not exceeding 70 kW net advises that:
•
The person carrying out a combustion measurement should have been assessed
as competent in the use of a flue gas analyser and the interpretation of the results;
•
The flue gas analyser used should be one meeting the requirements of BS7927 or
BS-EN50379-3 and be calibrated in accordance with the analyser manufacturers’
requirements, and
•
Competence can be demonstrated by satisfactory completion of the CPA1 ACS as-
sessment, which covers the use of electronic portable combustion gas analysers in
accordance with BS 7967, Parts 1 to 4.
Periodical check
To keep the unit working properly over time, it is necessary to have qualified personnel make an annual
check that includes the following tests:
•
The control and safety devices (gas valve, flow meter, thermostats, etc.) must function correctly.
•
The flue pipe must be fully efficient.
•
The airtight chamber must be sealed
•
The air-flue terminal and ducts must be free of obstructions and leaks
•
The condensate evacuation system must be efficient with no leakage or obstructions.
•
The burner and exchanger must be clean and free of scale. When cleaning, do not use chemical
products or wire brushes.
•
The electrode must be free of scale and properly positioned.
•
The gas and water systems must be leak free.
•
The water pressure in the heathing system must be about 1 bar; otherwise, bring it to that value.
•
The circulation pump must not be blocked.
•
The expansion tank must be filled.
•
The gas flow and pressure must correspond to that given in the respective tables.
•
The electrode must be properly positioned and free of deposits.
fig. 22 - Electrode positioning
A
The boiler casing, panel and aesthetic parts can be cleaned with a soft damp cloth, possibly
soaked in soapy water. Do not use any abrasive detergents and solvents.
Combustion check
Connect the flue gas analyzer to the flue gas sampling point as shown in the fig. 23 and check combus-
tion as described in table 7 and table 8.
1.
Press the CH button for 5 seconds to place boiler into test mode
2.
Wait for 10 minutes for the boiler to stabilize fully
3.
Take the measurement and record
4.
Take the boiler to minimum output by pressing the CH – button, allow the boiler to stabilize for a
further 10 minutes.
5.
Take the measurement and record.
fig. 23 - Flue gas sampling point
1 = Air - 2 = Flue gas
Tabella. 7 - Maximum rate
Tabella. 8 - Minimum rate
GAS RATES (NATURAL GAS)
AFTER 10 MINUTES FROM COLD
BOILER MODEL
Maximum rate
Minimum rate
m
3
/h
ft
3
/h
m
3
/h
ft
3
/h
i25
2.646
93.58
1.06
37.49
i29
2.963
104.80
1.06
37.49
C
D
B
D
C
E
G
A
ACCEPTABLE COMBUSTION RANGE
MAXIMUM RATE AFTER 10 MINUTES FROM COLD
Boiler Model
CO/CO
2
RATIO
CO
2
NG
CO
2
LPG
i25
0.004
7,2 ÷ 7,9
8,2 ÷ 8,9
i29
0.004
ACCEPTABLE COMBUSTION RANGE
MINIMUM RATE AFTER 10 MINUTES FROM COLD
Boiler Model
CO/CO
2
RATIO
CO
2
NG
CO
2
LPG
i25
0.004
2,0 ÷ 2,5
2,5 ÷ 3,5
i29
0.004
3
± 0,5
=
=
1
2
1
2