AERMEC GLFI10M Manuel D'utilisation page 31

INBUILT MODULATING VALVE OUTPUT
The thermostat board for the GLF grids has an inbuilt analogue output (M19: M20) that is dedicated to provide a voltage reference for the control
of the modulating valve for a 2-pipe system. The output logic of this voltage is the same as that shown in the Logic diagram valve control with
continuous ventilation considering the curves with excursion:
COOLING/HEATING MODE CHANGEOVER
SEASON CHANGEOVER ON THE BASIS OF THE WATER
If the thermostat is configured to be used without a valve (dip 1 OFF) or with a probe upstream from the valve (dip 2 ON), the measured water
temperature is the one effectively available on the terminal so the season is forced to Heating or Cooling according to that temperature. The
season changeover thresholds are shown in the figure below (where you can also see the meanings of dip 4).
In this configuration, the indications of the left-hand LED correspond to the active mode (red for Heating, blue for Cooling, and blue/pink or
red/pink in the disabled area). Ventilation is only enabled if the water temperature is suitable for Heating mode or Cooling mode. This avoids
unwanted cold ventilation during the winter, and controls the activation and deactivation of all the terminals on the basis of the effective state
of the water available (centralised control of the On-Off and Heating-Cooling commands).
SEASON CHANGEOVER ON THE BASIS OF THE AIR
There are certain types of system in which the season changeover depends on the air:
• 2-pipe systems with a water probe downstream of the valve
• all 2-pipe system without a water probe
• 2-pipe systems (cooling only) + Heater (heating only)
• 2-pipe systems + Heater used for integration/replacement
• All 4-pipe systems
The season changeover takes place on the basis of the following criterion:
- Cooling mode: if the room temperature is lower than the set value and the difference is equal to the dead band (2°C or 5°C), heating mode is
activated
- Heating mode: if the room temperature is higher than the set value and the difference is equal to the dead band (2°C or 5°C), cooling mode is
activated
The dead band is defined via Dip 7 - i.e. if Dip 7 is OFF, the dead band is 5°C, whereas if Dip 7 is ON, the dead band is 2°C.
In the presence of the VMF-IR remote control, the season change of the fan coil is dictated by the selection made using the "change season"
key
Δt HEATING = 1.8 °C
Δt COOLING = 1.2 °C
Vantilazione
Freddo
disabilitata
17°C 22°C
22°C 25°C
Caldo
35°C 39°C Normal Band (dip 4 OFF)
31°C 35°C Reduced Band (dip 4 ON)
AGLFI10NFJ 2006_5905245_01
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