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Sensors
Go to Menu ( ) - Engineering menu - Sensors.
Main sensor: a wired sensor connected to the control circuit board.
External sensor: a remote sensor that may be contained in the control panel or in a special device
with a parallel connection to the control panel.
Note: also requires activation of the sensor built into the control panel (see the instruction manual
for the specific control panel). If the same sensor is shared by several control panels, activate
the built-in sensor in only one of the control panels or otherwise the panels will show incorrect
feedback from the sensor.
If the corresponding main sensor or built-in control panel sensor is enabled, the unit begins to
respond to its signals. Enabling a missing sensor triggers the corresponding warning in the Alarms
menu.
: setting the measurement range for the СO
2
or the РМ2.5 sensor.
This setting defines the sensor signal limit value which corresponds to 10 V at the analogue input.
Boost switch. If this input is enabled, the Boost mode is activated on receiving a signal to this
input (on).
Fireplace switch. If this input is enabled, the Fireplace mode is activated on receiving a signal to
this input (on).
Note: the Fireplace mode is not available if the unit is configured to heat exchanger freeze
protection by supply fan or by bypass with the heater disabled.
0-10 V control device. If this input is enabled, the unit stops responding to pre-set speeds 1,2,3..
and will respond to an external pot resistor connected to the control circuit board. To enable this
control option, the unit must be in any mode other than Standby.
Fire alarm sensor. Make sure that the fire alarm sensor is connected before enabling this input. A
loss of signal at this input (off) triggers an alarm condition and causes the unit to shut down.
Water pressure sensor. If this sensor is enabled, the unit control system will monitor the heat-
transfer medium pressure. While the water heater is active, a loss of signal at this input (o) triggers
an alarm condition and causes the unit to shut down.
Water ow sensor.
If this sensor is enabled, the unit control system monitors the heat-transfer flow. While the water
heater is active, a loss of signal at this input (off) triggers an alarm condition and causes the unit to
shut down.
Depending on the unit configuration, the screen shows the supply/extract fan speed in rpm or
the supply/extract fan status (o - fan not spinning, on - fan spinning).
Supply/extract lter contamination control O - filter OK, on - replace the filter.
Main heater/preheater thermostat. If the respective heater is active, a loss of signal at these
inputs (off ) triggers an alarm condition and causes the unit to shut down.
Battery voltage. If the battery voltage drops below 2 V, replace the battery.
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