Paul FOCUS 200 Base Series, Operating Instructions Manual

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The optional electric pre-heater must take the form of the iso defroster heater DN 125 (Zehnder art.
no. 527003450) with a thermal output of 700 W.
X2 / X4b terminal on control board Wire of pre-heater cable
X2.33 Wire 1 PE
X4b.45 Wire 2 lvo
X4b.46 Wire 3 N
Tab. 9: Terminal assignment of external pre-heater connection
Commissioning the FOCUS unit
Readiness for operation
The unit is ready for operation once all the requirements of the safety regulations and installation
conditions have been met. In particular, this means ensuring that the ventilation tube material is clean
and that all the ventilation technology components required to operate the system are present,
properly installed and ready for operation.
Check all the safety-related components and carry out a function test.
Adjusting the air volume flow
Once you have checked that the FOCUS unit is ready for operation, you can commission it as described below. Diagram
1 shows the scale for the available air volume flow to enable rotary knob positioning. According to the plant design the
total outside air volume flow is to be laid out as nominal ventilation. This nominal air volume flow should correspond to
a rotary knob position of figure control panel.
Fig. 24: Diagram 1, fan speed parametrisation
Fig. 25: Diagram 2, assignment of volume flow ranges