Pellas X S.Control, Operation And Installation Manual, Page: 37 / 48

37
temperature reduction) also will not cause reduction in preset
temperature below value set in this parameter.
Maximum mixer temperature
Parameter serves two functions:
- allows restricting setting too high mixer preset temperature.
Automatic control also will not cause exceeding preset temperature
above value set in this parameter.
- with parameter mixer setting = activated FLOOR is also limit
temperature of mixer sensor when mixer pump is deactivated. For
floor heating set the value below 45 degrees C
– 50 degrees C or
other if producer of materials used for floor or CH installation designer
state differently.
Proportionality range
Attention: it is not recommended to modify the parameter.
It is the mixer step value. If increased, the mixer circuit reaches the
preset value in a shorter time. Excessive parameter value may result
in overshooting and unnecessary feeder movements which reduce the
feeder life. It is recommended to set the parameter value within the
range of 2 to 6 (factory setting: 3).
Integration time constant
Attention: it is not recommended to modify the parameter.
The parameter which has an impact on the mixer standby time when
the temperature measured by the mixer circuit sensor is close to the
preset circuit temperature. Higher value translates into longer
standstills of the cylinder. Excessive value will extend the time
necessary for the cylinder to stabilize the preset circuit temperature. If
the value is too high, the time necessary for the cylinder to stabilize
the preset circuit temperature will be prolonged. Setting the value too
low may result in the temperature overshooting or a premature
cylinder wear. It is recommended to set the parameter value between
80 and 140 (factory setting: 110).
Valve opening time
Set full valve opening time given at the plate of valve servomotor, i.e.
140s.
Pump off by thermostat
Setting the parameter on YES value causes closing of mixer
servomotor and deactivating mixer pump after disconnecting joints of
room thermostat. This is not recommended because the heated room
can be too cool.
Mixer input dead zone
Setting parameter determining value of temperature dead zone for
mixer controlling circuit. The controller regulates mixer in such a way
to keep the temperature of mixer cycle equal to preset value.
However, avoid too frequent movements of servomotor, which can
shorten its long-life usage. Regulation is undertaken only when
measured temperature of mixer cycle will be higher or lower than
preset value by the value bigger than mixer dead zone.
14.6 OTHERS
Show advanced setup
Options available:

YES (displays hidden parameters which edition is not
recommended)

NO (hides hidden parameters)
Service counters
Collective service information about the status of the boiler, power
boiler and burner during operation of the boiler feed pumps, etc.
Output H mod A
Output H mod B/C
Output H mod A:

boiler reserve
– output 39-40 controls the reserve boiler.

alarms
– the alarm output is activated 39-40. It allows to select
the alarm on which the output H mod A it react.

circulation pump - output 39-40 controls the circulation pump.

signaling operation mode
– output 39-40 voltage is applied
continuously in all operating modes of the controller. The voltage
is taken only when the controller is switched off.