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4.5.1 Chimney sweep function
(fig.
21)
To check boiler combustion, press the
installer’s key
for a few seconds.
The
chimney sweep function will switch on
and will continue for 15 minutes.
From that moment, the boiler will start
working in heating mode at maximum
power, with cut off at 80°C and re-igni-
tion at 70°C
(ATTENTION! Temperature
may reach excessive values when using
unprotected low temperature plants.
Before activating the chimney sweep
function make sure that the radiator
valves or eventual zone valves are
open)
.
The test can also be carried out with the
boiler working in D.H.W. mode.
For this, after activating the chimney
sweep function, open one or more hot
water faucets. Under these conditions,
the boiler will function at maximum
power with the D.H.W. circuit kept at
between 60°C and 50°C. During the
test, the hot water faucets must remain
open.
If the key
and
are pressed during
the 15 minutes of the chimney sweep
function, the boiler will be brought
respectively to maximum and minimum
power.
The chimney sweep function will auto-
matically switch off after 15 minutes or
when the key
is pressed again.
4.5.2 Operation floor drying
(fig.
22)
The operation floor drying keeps the floor
at a pre-established temperature profile
and it is
activated only for those systems
combined with the mixed zone card
MIXED ZONE code 8092234
. The tempe-
rature profiles can be selected by means
of the installer parameter PAR 43:
0 = Not activated function
1 = Curve setting A
2 = Curve setting B
3 = Curve setting A + B
The turning off of the function happens
clicking on the button OFF (return of PAR
43 to the value 0) or automatically at the
end of the function.
The set of the mixed zone follows the
development of the selected curve and
reaches a maximum of 55°C.
During the function all the other heating
demands are ignored (heating, sanitary,
antifreeze and chimney sweep).
During the functioning the display shows
the remaining days for the completion of
the function
(example mains digits -15 =
15 days lack to the end of the function).
The diagram fig. 22 reports the develop-
ment of the curve.
ATTENTION:
- Observe the relevant standards and
regulations of the floor manufactu-
rer!
- Proper functioning is ensured only
when the plant is correctly installed
(hydraulic system, electrical instal-
lation, settings)! If not observed, the
floor might get damaged!
50
45
40
35
30
20
5
10
15
18
[Tag
]
0
25
55
A
B
1
1
5
7
X
A + B
1
25
[TVw]
Fig. 22
TVw
Flow temperature setpoint
Tag
Period in days
x Start
day
A Functional
heating
B
Floor curing heating
Fig. 21
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