Installation and operation manual
9
FWEC3
Advanced plus electr
onic controller
FC66002765
WATER CONTROL
Irr
espective of the type of fan present (modulating or non-
modulating), fan operation will be constrained by the system
water temperature control. Based on the operation mode,
different heating or cooling thresholds will be enabled.
Upon a call of the thermostat, the absence of the enabling
signal will be indicated on the display by the fl ashing of the
symbol representing the active mode (
or )
The enabling signal is ignor
ed:
■ if the water sensor is not included (P04 = 0) or in alarm
status because disconnected
■ in the cooling mode with 4-pipe confi gurations
FORCED OVERRIDES
The normal fan operating logic (modulating or non-modulating)
will be ignored in particular override situations that may be
necessary to ensure correct control of the temperature or the
unit operation. This may occur:
in the cooling mode:
■ on-board controller (P01 = 0) and confi gurations with valve:
the minimum speed available will be maintained even once
the temperature has been reached.
■ on-board controller and valveless confi gurations: after
every 10 minutes in which the fan remains idle a 2 minute
cleaning is carried out at medium speed to enable the air
sensor to read the room temperature more correctly.
in the heating mode:
■ While the electrical heater is on: the fan is forced to run at
medium speed
■ once the electrical heater has gone off: a 2 minute post-
ventilation cycle will be run at medium speed. (N.B.: this
cycle will be completed even if the thermostat is switched
off or in the event of a changeover to the cooling mode)
DISPLAY
The display shows the fan status
■ On fl ashing: fan in standby mode
■ On steadily lit: fan on
■ OFF: fan disabled to operate by natural convection only
and fan speed (with indication of “automatic” logic if pro-
per) enabled or selected (in case of stand-by fan)
AUTOMATIC OPERATION LOGIC (AUTO):
WITH 3 OR 4-SPEED CONFIGURATIONS AND ON/OFF
VALVE(S) OR W/O VALVE(S):
N.B.: in case of 4-speed confi guration and valve,
ventilation in heating mode is shifted by 0.5°C
to permit a natural convection phase
WITH 3 OR 4-SPEED CONFIGURATIONS AND
MODULATING VALVE(S):
HEATING WITH 3-SPEED CONFIGURATIONS
HEATING WITH 4-SPEED CONFIGURATIONS
HEA
TING
Room
temperature
Room
temperatur
e
COOLING
W
ater
temperature
COOLING
HEA
TING
Water
temperature
COOLING
Room
temperature
Room
temperatur
e
Room
temperatur
e
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