12
Heating function
DEFAULT SETTING: set point regulation
(technical parameter t01 = 0)
When heating cycle activation is requested by the room thermostat,
the circulation pump is powered while the modulating valve is opened
gradually until the set point temperature is reached. In the high
temperature models (SATK2230. - SATK2240.) the valve is opened
up to the maximum allowed (see “primary flow rate limitation” on
page 14).
The circulation pump is stopped and the modulating valve is closed at
the end of the heating cycle. The heating cycle ON condition is indicated
by the blinking
symbol.
Heating flow temperature setting (SATK2210. and SATK2220.)
To set the flow temperature press the <SET> key until the symbol in
the red circle appears. Use the <R> knob to change the value.
The flow temperature range is:
25–45°C for SATK2210. (LOW temperature)
45–75°C for SATK2220. (MEDIUM temperature)
OPTIONAL SETTING: primary return temperature limit
(technical parameter t01 = 1)
When heating cycle activation is requested by the room thermostat,
the circulation pump is powered while the modulating valve is opened
gradually until the set point temperature is reached (in SATK2230.
and SATK2240. the vale is open fully, up to the maximum allowed), if
the return temperature is lower than or equal to the set limit value. In
case this condition is not met, in HIUs with control of the flow temp.
(SATK2210. and SATK2220.) the flow temperature is reduced (by a
maximum of 15°C in SATK2220., and maximum 3°C in SATK2210., in
order to bring return temperature within the limit values. In SATK2230.
and SATK2240. a reduction of the heating flow rate is operated. When
the flow temperature/flow rate must be reduced in order to limit return,
the
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icon appears on the display.
To set the flow temperature press the <SET> button until the symbol
in the green circle appears. Use the <R> knob to change the value (*).
The primary return limit temperature range is:
15–42°C for SATK2210. (LOW temperature)
30–70°C for SATK2220. (MEDIUM temperature)
OPTIONAL SETTING: modulating temperature regulation with
compensated set point (technical parameter t01 = 2)
(SATK2210. and SATK2220.)
When the function is enabled, the flow temperature is modified
(± 10°C with respect to the set point for HIU in HIGH temperature,
± 3°C if in LOW temperature) according to the temperature detected
by the return probe in order to maintain this latter temperature value
constant. This keeps the actual thermal output of the slab under
control, and consequently also the ambient thermal load. The thermal
response time of the system is thus minimised.
This feature should not be used in combination with thermostatic
radiator valves.
When the function is enabled the display shows the symbol .
OPTIONAL SETTING: weather compensation (technical
parameter t01 = 3)
When the function is enabled, the flow temperature is calculated
based on the temperature detected by the outside probe (optional
code 789833), in accordance with the curve shown below. The “k”
coefficient can be changed by pressing <SET> button until the related
setting appears.
The display shows the symbol
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.
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intervento limite temperatura ritorno
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(*) if these set points cannot be changed you must set parameter
t07 to value 0 in the technical menu (see “access to technical menu”
below). Parameter t07 = 1 “freezes” the operating set points to
prevent inadvertent modifications by the user.
Text (°C)
T flow (°C)
MIN
5
0
-5
-15
MAX
10
-10
20
15
25
30
-20
k = 3.0
k = 2.5
k = 2.0
k = 1.5
k = 1.0
k = 0.5
k = 0.0
MAX is the set temperature value
MIN is 45°C for HIGH temp. HIUs, 25°C for LOW temp. ones.
<mode>
ACS ON/OFF
Risc. ON/OFF
<set>
Ora/giorno corrente
Temperature di set point
k regolazione climatica
<day/night>
Set diurno/notturno
<temp>
Visualizzazione
temperature
(set point am
sonde)
<prog>
Programmazione oraria
riscaldamento e funzione
“comfort”
<reset>
Reset errore riarmabile/funzione
scaldamassetto
<R>
+/-
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mandata a punto fisso
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climatica
