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303
EN
cod. 3542A221 - Rev 00 - 10/2022
ALHENA TECH K 50
In each of the above cases,
b27
automatically changes to
5
.
It is necessary to perform the
calibration procedure [Auto Setup]
in the following cases:
•after replacing the PCB
•after changing the gas
(b03)
•setting parameter
P67
to
1
•after changing the value of parameter
P68
•after setting parameter
b27
to
5
for replacement of components such as the electrode, burner,
gas valve, fan or for installations with maximum flue resistance
•in case of fault conditions
A01
,
A06 or other faults when required
(see table 12. Respect the
sequence of fault cures).
The
calibration procedure [Auto Setup]
resets the combustion parameters previously recorded
and must be done only in the cases described above.
Test mode [Test]
Do a heating or DHW request.
1.Access the
Main menu [MENU]
with the
button .
Follow the path
installer menu [Service]
>enter the
Password 1234
(see fig. 17)
>
test mode menu [Test]
.
Confirm with the button
.
2.After ignition, the power goes to Medium
"med". When the combustion value is
stable, "med ok" is displayed (point
).
3.The heating buttons are used to vary the 4
power levels: min (Minimum power), med
(Medium power), max CH (CH Maximum
power) and max (DHW maximum power)
(point ).
4.Only when the
step
value at the set power
is followed by "ok" (med ok, min ok...) can
the CO
2
be adjusted with the DHW but-
tons. Pressing the
DHW
button will in-
crease the “Offset” value by one unit
(point
). By pressing the
and
DHW
buttons for more than 2 sec., the
Offset value will change by 3 units (Offset
adjustment is possible only in steps:
max, med and min
).
When the Power value is followed by "ok"
the combustion value will be saved.
5.The “Offset” adjustment range is from -8 to
+8. Increasing the value decreases the
CO
2
, decreasing it increases the CO
2
.
The CO
2
adjustment must not be done
with less than 500 burner operation
hours, because the system adjusts itself.
fig. 39
To exit the
test mode [Test]
hold down the button
.
If the
Test mode [Test]
is active and enough hot water is drawn to activate the
DHW mode
, the
boiler remains in
Test mode [Test]
but the 3-way valve switches to DHW.
The
Test mode [Test]
is automatically disabled after 15 minutes or when the hot water tank tem-
perature has reached the setpoint.
a
a
b
TEST
Step:
Offset:
Power:
CH temp:
med ok
0
53%
43°
Alarm:
none
a
b
Содержание 0T4T4AWD
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