ModvlvS ACC30 Handbuch Seite 22

Parameters for mixing circuit:
Para- Function
meter
S2.1 MIN. SETPOINT
TEMPERATURE IN
HEATING MODE
S2.2 MAX. SETPOINT
TEMPERATURE IN
HEATING MODE
S2.3 MIN. SETPOINT
TEMPERATURE IN
COOLING MODE
S2.4 MAX. SETPOINT
TEMPERATURE IN
COOLING MODE
S2.7 BACKLASH OF
MIXING VALVE
S2.8 MIXING VALVE P -
CONSTANT
S2.9 MIXING VALVE I -
CONSTANT
S2.10 MIXING VALVE D -
CONSTANT
S2.13 BOILER CIRCULATI-
ON PUMP - TIME OF
BOILER TEMPERA-
TURE INCREASE
(SECONDS)
S2.14 BOILER CIRCU-
LATION PUMP
OPERATION
1. STANDARD
2. PERMANENT
S2.16 BOILER CIRCU-
LATION PUMP -
SWITCH-OFF DELAY
(SECONDS)
S2.16 BOILER CIRCULA-
TION PUMP - SHUT-
DOWN DIFFERENCE
T2-T1 (°C)
20 English
Parameter description
Setting of minimal allowed setpoint temperature in heating
mode. Setpoint temperature cannot be adjusted lower as
with this parameter.
Setting of maximal allowed setpoint temperature in heating
mode. Setpoint temperature cannot be adjusted higher as
with this parameter.
Setting of minimal allowed setpoint temperature in cooling
mode. Setpoint temperature cannot be adjusted lower as
with this parameter.
Setting of maximal allowed setpoint temperature in cooling
mode. Setpoint temperature cannot be adjusted higher as
with this parameter.
Setting of mixing valve running time to compensate the
backlash of actuator and mixing valve assembly, which
occours by change of rotation direction.
Setting of mixing valve position correction intensity. Smal-
ler value means shorter movements, higher value means
longer movements,
Setting of mixing valve control frequency - how often
mixing valve position is being controlled. Smaller value
means low frequency, higher value means higher
frequency.
Sensitivity of mixing valve for stand-pipe temperature
changes. Smaller value means low sensitivity, higher
value means high sensitivity.
This function is used in regulation of return in solid fuel
boiler. In the set time, the regulator determines tempe-
rature increase of the boiler by 2°C. If an increase in the
boiler is determined, the regulator activates the circular
pump.
The setting informs us about the operation of the circular
pump of the boiler:
1-STANDARD menas that the pump is operating accor-
ding to the minimum set temperature of the system, and
when the difference between the boiler and return line.
2-PERMANENT means that the pump is operating
continuously when boiler temperature is higher than the
set minimum set temperature of the boiler. This mode is
used for pellet boilers when there is no sensor available in
the thermal storage.
Setting of delayed circulation pump switch-off when there
is no requirement for heating.
This setting determines the difference between sensors T2
and T1 which shuts down circular pump of the boiler.
Setting range Default
value
5 ÷ 70 °C
50 °C
10 ÷ 95 °C
70 °C
10 ÷ 25 °C
15 °C
15 ÷ 35 °C
30 °C
0 ÷ 5 s
0,5 ÷ 2,0
0,4 ÷ 2,5
0,4 ÷ 2,5
30 ÷ 900
seconds
300
1- STANDARD
2- PERMANENT
30 ÷ 900 seconds
300
2.0 ÷ 8.0 °C
3.0
1
1
1
1
1