User Manual

Functions
Fan control
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● Auto fan runs in the dead zone at low speed in Cooling mode only (P029 = 2).
In heating mode, fan does not run in the dead zone.
● Auto or manual fan does not run in the dead zone (P029 = 3)
● Auto or manual fan runs in the dead zone at low speed in heating and cooling
mode (P029 = 4)
● Auto or manual fan runs in the dead zone at low speed in cooling mode only
(P029 = 5).
In heating mode, fan does not run in the dead zone.
When the fan does not run in the dead zone (P029 = 0), the " Periodic fan kick
Comfort" (P363) function can be enabled for providing periodical ventilating in the
room.
When the fan starts from standstill, it starts at speed 3 for 1 second to ensure safe
fan motor start by overcoming inertia and friction (selected via P361).
In heating sequence, when return water temperature is more than 30 °C (factory
setting, P366), fan operation is enabled even the fan start delay time (P365) is not
reached.
A universal input set as “coil temperature’ (P150, P153 or P155 = 12) needs to be
used to activate this function.
When the electric heater is switched off, the fan overruns for 60 seconds (P352) to
avoid overtemperature of the electric heater or prevent the thermal cutout from
responding.
WARNING
Fan failure
In case of fan failure, the thermostat cannot protect the electric heater against
overtemperature. For this reason, the electric heater must feature a separate
safety device (thermal cutout).
The "Clean fan filter reminder" function counts the fan operating hours and displays
message "FIL " to remind the user to change/clean the fan filter as soon as the
threshold is reached. This does not impact the thermostat's operation, which
continues to run normally. The function is set via P501 (default = OFF (0)).
The "Clean filter reminder" is reset when the operating mode is manually set to
Protection and back.
In Auto mode, the default fan mode is automatic. The fan mode can be changed to
Manual by pressing the FAN button. The fan returns to the automatic default mode
after each switchover from Comfort to Economy mode, and vice versa.
To let the heating/cooling coil reach its temperature, the fan start can be delayed
by a time period set via P365.
Function for On/Off control outputs is listed as following figure:
Fan start kick (P361)
Fan start, minimum hot
water temperature (P366)
Fan overrun for electric
heater
Clean fan filter reminder
Fault information
Fan in Auto mode
Fan start delay
Example