Galletti MYCOMFORT LARGE Manual Del Usuario página 43

MYCOMFORT LARGE
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 configurations with valve: the minimum speed
available will be maintained even once the temperature has been reached.
> on-board controller and valveless configurations: 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 heating element is on: the fan is forced to run at medium speed
> once the heating element has gone off: a 2 minute post-ventilation cycle will be
run at medium speed. (NB: 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 flashing: 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 proper) enabled or selected (in
case of stand-by fan)
> Extra low speed:
> Minimum Speed
> Medium Speed
> Maximum Speed
NB: in the case of modulating fans, the four symbols mentioned above indicate the
interval (extra-low, low, medium and high) in which the operating speed falls.
NB: if the active speed is different from the one selected by the user (in the case of
a forced override), pressing the button Fan
displayed; pressing again will change this setting.
VALVE
The controller can manage 2- or 3-way valves of the ON/OFF type (i.e. completely
open or completely closed) or modulating valves (the degree of valve opening may
range between 0% and 100%). As in the case of fans, parameter P14 (configuration
of analog outputs) must be carefully set based on the type of valves actually present
in the unit, so that the controller will implement the correct control logic.
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once will cause the latter to be
43
ON/OFF VALVE
The valve opening is controlled according to the operating setpoint and air temperature
setpoint
COOLING
HEATING
MODULATING VALVE
The valve opening is controlled according to the operating setpoint and air temperature
setpoint The regulation logic for opening conforms to the diagrams below.
COOLING
OPENING (%)
HEATING WITH 3-SPEED CONFIGURATIONS
HEATING WITH 4-SPEED CONFIGURATIONS
WATER CONTROL
The checking of water temperature to enable valve opening is a function that concerns
only configurations with 3-way valves and heating element. In such configurations
the water temperature will be checked in the following cases:
> Heating with heat element: operation of the heating element will force the fan to
switch on; it is therefore necessary to prevent excessively cold water from
passing through the unit.
GB
AIR TEMP.
AIR TEMP.
AMBIENT TEMP.
OPENING (%)
AMBIENT
TEMP.
OPENING (%)
AMBIENT
TEMP.
WATER
TEMP.
FC66002638 - rev. 05