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14 SERVICE SETTINGS OF MIXER
Mixer servo and mixer pump are OFF
It is used when the mixer circuit supplies CH radiator
system. Max. temperature of mixer circuit is not limited,
mixer is fully opened during alarms e.g. boiler overheating.
Note: do not activate this option if the pipes used are not
high-temperature resistant. In such conditions it is
recommended to set "MIXER SUPPORT " at "FLOOR”.
It is used when the mixer circuit supplies underfloor heating
system. Max. temperature of mixer circuit is limited to the
value of the parameter of "Max. preset mixer temp.” Note:
upon selection of the option of "FLOOR ON" set the max.
preset mixer temperature at such value, which prevents the
floor destruction and occurrence of burn risk.
Once the mixer temperature has exceeded a "mixer preset
value", power supply to mixer pump stops. Once the mixer
temperature has dropped by 2 ºC, the pump switches on
again. This option is mainly used to control the underfloor
heating pump in case it works with thermostatic valve
without servo.
This parameter is used to prevent the user to set too low
preset value of mixer circuit temperature.
This parameter has two functions:
- it enables preventing the user to set too high value of
preset mixer temperature,
- when the parameter "Mixer support " is set at "FLOOR ON,
it determines the limit value of mixer temperature at which
the mixer pump will stop. For underfloor heating set this
parameter at the value not exceeding 45°C - 50°C unless
the manufacturer of materials used to complete the floor or
CH system designer has recommended other values.
Enter the time of full valve opening taken from the rating
plate of valve servo (e.g. 140s)
Once this parameter has been set at "YES", mixer servo
closes and mixer pump stops upon opening thermostat
contacts (the room has been heated). Performance of this
operation is not recommended because the heated room
may be cooled down too much.
Upon setting of Operat. in SUMMER = ON , mixer is not
closed in SUMMER mode.
Parameter setting, which determines the value of
temperature dead zone of mixer control system. The
regulator controls the mixer in the manner assuring that
actual temperature value measured by the mixer sensor is
equal to the preset value. Nevertheless, in order to avoid too
frequent servo motions, which may unnecessarily reduce its
lifetime, regulation starts once the measured temperature of
the mixer circuit has been higher or lower than the preset
value by the value set in Mixer input dead zone.
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