Ferroli SKY ECO F Installations, Bedienungs Und Wartungsanleitungen Seite 89

SKY ECO F
3.1.2 Activation of Auto-setting function for gas
valve calibration
THIS PROCEDURE MUST ONLY BE CARRIED OUT
IN THE FOLLOWING CASES: GAS VALVE REPLACE-
MENT, CARD REPLACEMENT, CONVERSION FOR
GAS CHANGE.
The B&P Gas Valve (with integrated modulating opera-
tor) does not provide for mechanical calibration: the mi-
nimum and maximum power adjustments are therefore
electronically done via two parameters:
Contents Description
q01 Absolute MINIMUM current Offset
q02 Absolute MAXIMUM current Offset
Gas valve pre-calibration
1. Connect a pressure gauge to monitor the gas valve
outlet pressure.
2. Activate the calibration procedure by pressing the
DHW "+" button and "On/Off" button together for 5
seconds. The message "Au" appears alternating with
"to" and the burner is lit. Within 8 seconds the water
heater finds the ignition point. The values of ignition
point, absolute minimum current Offset (parameter
q01) and absolute maximum current Offset (value
q02), are stored by the card.
Gas valve calibration
1. The display will show "q02" flashing; the modulation
current is forced to the pre-calibration value of the
absolute maximum current Offset parameter (para-
meter q02).
2. Press the DHW "+" or "-"buttons to adjust parame-
ter "q02" until the maximum nominal pressure minus
1mbar is reached on the pressure gauge. Wait 10
seconds for the pressure to stabilise.
3. If the pressure read on the pressure gauge is diffe-
rent from the maximum nominal pressure, proceed
with increments of 1 or 2 units of parameter "q02" by
pressing the DHW "+" button: after each change, wait
10 seconds for the pressure to stabilise.
4. When the pressure read on the pressure gauge is
equal to the maximum nominal pressure (the value
of parameter "q02" just set is automatically saved),
press the "On/Off" button: the display will show "q01"
flashing; the modulation current is forced to the pre-
calibration value of the minimum absolute current Of-
fset parameter (value q01).
5. Press the DHW buttons to adjust parameter "q01"
6. Press the DHW "-" button to adjust parameter "q01"
7. If the pressure read on the pressure gauge is diffe-
Natural Gas Propane Gas
0÷100 0÷150
0÷100 0÷150
8. When the pressure read on the pressure gauge is
9. The calibration procedure ends automatically after
Checking of gas pressure values and adjustment
with limited range
If the maximum and/or minimum nominal pressures read
on the pressure gauge are different from those
indicated in the technical data table, proceed with the
next sequence.
cod. 3541S170 - Rev. 04 - 09/2019
until the minimum nominal pressure plus 0.5mbar is
reached on the pressure gauge. Wait 10 seconds for
the pressure to stabilise.
until the minimum nominal pressure is reached on
the pressure gauge. Wait 10 seconds for the pressu-
re to stabilise.
rent from the minimum nominal pressure, proceed
with decrements of 1 or 2 units of parameter "q01" by
pressing the DHW "-" button: after each change, wait
10 seconds for the pressure to stabilise.
equal to the minimum nominal pressure (the value of
parameter "q01" just calibrated is automatically sa-
ved), recheck both adjustments by pressing the "On/
Off" button and correct if necessary by repeating the
procedure described above.
15 minutes or by pressing the DHW "+" button and
"On/Off" button together for 5 seconds.
• Check that the supply pressure complies with that
indicated in the technical data table.
• Connect a suitable pressure gauge to pressure
point "B" located downstream of the gas valve.
• Activate the TEST mode (keeping the "+" and "-"
buttons pressed together for 5 seconds) and fol-
low the instructions for checking the gas pressures
at maximum power and minimum power (see next
paragraph).
• Press the "On/Off" button for 2 seconds to enter
the gas valve calibration mode with limited range
(variation of 12 points with respect to "autosetting"
calibration).
• The card goes to the "q02" setting (maximum po-
wer); displaying the currently saved value, by pres-
sing the DHW buttons.
• If the maximum pressure read on the pressure gau-
ge is different from the nominal one, proceed with
increments/decrements of 1 or 2 units of parameter
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