AERMEC FCL Series - Water Control Logic

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Water control (optional)
It is possible for a probe (SW 4) to be installed for reading the temperature of the water circulating
in the exchange coils. Below there is a detailed description of a control logic for enabling/disabling
the loads on the basis of the temperature read by the water probe and the functioning mode set
from the remote control. Thus, if a water probe has been installed, the control logics of the
functioning modes (seen beforehand) must take into account the enabling/disabling of the load
controlled by the water check.
17 °C 22 °C
35 °C 39 °C
Configuration Mode Hysteresis Hysteresis
HEATING Y1 off,
FAN on
Y1 enabled
FAN enabled
Two-pipe fan coil,
with upline water
probe
COOLING Y1 enabled
FAN enabled
Y1 off
FAN on
HEATING Y1 enabled
FAN on
Y1 enabled
FAN enabled
Two-pipe fan coil,
with water probe on
the coil
COOLING Y1 enabled
FAN enabled
Y1 enabled
FAN on
HEATING Y2 off
FAN on
Y2 enabled
FAN enabled
Four-pipe fan coil,
with upline heating
water probe
COOLING Y1 enabled
FAN enabled
HEATING Y2 enabled
FAN on
Y2 enabled
FAN enabled
Four-pipe fan coil,
with heating water
probe on the coil
COOLING Y1 enabled
FAN enabled
HEATING Y1 off
FAN enabled
RE enabled
Y1 enabled
FAN enabled
RE on if
supplement
Two-pipe fan coil
with electric heater
with upline water
probe
COOLING Y1 enabled
FAN enabled
Y1 off
FAN on
HEATING Y2 off
FAN enabled
RE enabled
Y2 enabled
FAN enabled
RE on if
supplement
Four-pipe fan coil
with electric heater
with upline heating
water probe
COOLING Y1 enabled
FAN enabled
behaviour of the system with water probe
Important notes:
The configuration with electric heater and water probe on the coil is not envisaged.
In the case of a replacement electric heater and the water probe absent or broken, the system
assumes that the water temperature is always sufficient: the electric heater is NEVER activated.
The replacement electric heater continues to function for 2’40’’after the reactivation of the heating
water valve, to allow the hot water to start circulating again.
With continuous ventilation: if the water probe is on the battery and the valve is closed (because
the set temperature has been reached), the logic does not take into account the cooling or the
heating of the water in the coil (that will be in line with the ambient temperature) until the valve is
opened again.