Seltron ACD20, Instruction Manual

Page: 35 / 52

| 35 Instructions for settings
EN SERVICE S PARAMETERS
Para-
meter
Parameter name Parameter description Setting
range
Default value
S2.9 Mixing valve
I - constant
Setting of mixing valve control
frequency - how often mixing
valve position is being controlled.
Smaller value means low
frequency, higher value
means higher frequency
0.4 ÷ 2.5 1
S2.10 Mixing valve
D - constant
Sensitivity of mixing valve for
stand-pipe temperature changes.
Smaller value means low
sensitivity, higher value means
high sensitivity.
0.4 ÷ 2.5 1
S2.13 Boiler circula-
tion pump -
boiler temper-
ature increase
time (seconds)
This function is used to control
the return to the solid fuel boiler.
Within the set time, the controller
detects a 2 °C increase in the
boiler temperature. If a boiler
increase is detected, the control-
ler starts the circulation pump.
30 ÷ 900
seconds
300 s
S2.14 Boiler
circulation
pump -
operating
mode
This setting determines the
operation of the boiler circulation
pump:
- Standard - means that the
pump operates according to the
set minimum system temperature
and when the differential between
the boiler and the return-pipe is
exceeded.
- Constant - means that the pump
operates whenever the boiler
temperature gets higher than the
set minimum system temperature.
This mode can be used for pellet
boilers when there is no sensor in
the heat storage.
- Standard
- Constant
Standard
S2.15 Circulation
pump - switch-
off delay
(minutes)
Setting of delayed circulation
pump switch-off when there is no
requirement for heating.
30 ÷ 900
seconds
300 s