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55
AST 14 C 255/00
-
with
P17 = 1 (multifunction relay in remote relay/TA1), the relay is energised in
response to a request from the remote control or from TA1 and returns to the
rest condition upon a DHW request or in case the boiler is switched OFF or to
DHW ONLY mode;
-
with
P17 = 3 (multifunction relay in TA2 request), the relay is energised in
response to a request from TA2 and returns to the rest condition upon a DHW
request or in case the boiler is switched OFF or put into DHW ONLY mode;
During the operation in heating mode, upon any DHW request, the latter has higher priority
and forces the interruption of the function in progress.
CH modulation temperature - standard range (P10
≥
1):
CH temperature setting range: 35÷78°C
CH thermostat triggering temperature OFF = set-point + 5° C
CH thermostat triggering temperature ON = set-point + 0° C
Heating thermostat timer (antifast) - can be set through P11: 0÷10 min, default 4 min with
Tflow > P27
CH thermostat timer reset temperature through parameter P27: 35÷78°C, default 40°C
Heating output rising ramp timing by means of parameter P12: 0÷10 min, default 1 min
Heating modulation temperature reduced range (P10<1):
Heating temperature setting reduced range: 35÷45°C
Reduced CH thermostat triggering temperature OFF = set-point + 2° C
Reduced CH thermostat triggering temperature ON = set-point - 2° C
Heating thermostat timer (antifast) - can be set through P11: 0÷10 min, default 4 min with
Tflow > P27
CH thermostat timer reset temperature through parameter P27: 35°C fixed
Heating output rising ramp timing by means of parameter P12: 0÷10 min, default 1 min
The set-point depends on the setting of the heating temperature through the boiler keys
or the temperature set through remote control.
THERMOREGULATION WITH AMBIENT PROBE
Flow water temperature value is set differently depending on the type of ambient
modulation to be set
With P57=0
(on - off-type modulation)
flow set-point is set with the “+/- heating” keys;
With P57=1
(ambient probe modulation)
flow set-point is calculated according to parameter
P10 according to the following formula:
P10
≥
1
Tset_flow = 45°C + [20*(ambient Tset-point – T_current_ambient)]
P10 < 1
Tset_flow = 30°C + [20*(ambient Tset-point – T_current_ambient)]
With P57=2
(external probe modulation)
refer to next section;
