34
English
AGLL10/20NFJ 07/11_4528571_00
The set point of centralized systems in
which there are network connected
fan coils, is decided by a central unit.
The user may have the opportunity to
increase or decrease the setpoint accord-
ing to the table below.
Dead band
[
°C
]
Deviation of the setpoint
[
°C
]
2
+/- 3
5
+/- 6
The Sleep function in the thermostat is
available if the thermostat is interfaced
with a presence sensor (with normally
open logic) connected to its SP input. In
practice the function consists in chang-
ing the regulation setpoint of the fan
coil if the air-conditioned environment
is not occupied; i.e. decreasing if oper-
ating hot, increasing if operating cold.
This function aims at saving energy. In
this specific case, if the thermostat card
was connected to a presence sensor, the
logic of the SP input occurs as follows:
SP input
Heating Cooling
Dip 7 Off
Dip 7 On
Dip 7 Off
Dip 7 On
Open
Closed
°C
°C
°C
°C
SLEEP FUNCTION
COMFORT FUNCTION
The air side season changeover is inhibited when the SP input is kept closed; this function prevents incorrect status changes
due to the change of the setpoint
In AUX mode is required for activation
of the accessory electrical resistance,
and its susceptibility to the user interfa-
ce VMF-E4
The standard operation of the accessory
provides resistance to his command for
ON-OFF. In order to control this type of
accessory you must first set up the con-
figuration of the dip in the 6-speed On
and set the switch in the "Aux".
The operation of the electrical resistance
occurs when there has been a request
for operation of the thermostat and the
water temperature is sufficiently low.
It is noteworthy that the resistance to
the startup of the thermostat is in the
OFF state, will then be activated only
if the water temperature is below the
threshold of qualification (which is 35
° C with normal bandwidth, 31 ° C with
band reduced).
The activation of the electrical resistan-
ce, however, provides management of
ventilation as a function proportional to
the error but where is the minimum gua-
ranteed speed V2.
This tax is due by the need to provide
adequate dissipation of heat generated
by joule effect resistance.
If the fan coil is operated with conti-
nuous ventilation at the setpoint is rea-
ched the electrical resistance will be
turned off while the fan, after the post
purge phase described below, will conti-
nue with the minimum speed.
The operation of the electrical resistance
of the phases provides pre-purge and
Post-purge in relation to its activation
and deactivation:
Prepurge (20 "to Vminaux) is always
with the activation of the RE
Post-purge step is always the case the
deactivation of the RE (60 "to Vminaux).
WARNING! prepurge (approxima-
tely 20 "Vminaux) is always with the
activation of the RE and the RE of ladi-
sattivazione post purge is always the
case (about 60" Vminaux).
The control software verifies the correct
operation of the anomalous resistance
considering the following:
Thermal resistance
Absence of resistance
The thermal resistance is performed by
reading the NTC that detects the actual
temperature of the accessory.
The control of the absence of resistance
is given by checking the status of the
fuse F2 and the control of the tempera-
ture of at least 50 ° C after 90 seconds of
the load.
The alarm of the resistance (the
combination of heat or lack) is a failure
that inhibits its operation and to restore
the activation must toglieretensione the
thermostat.
FUNCTION ELECTRICAL RESISTANCE
THERMOSTAT SAFETY OF ELECTRICAL RESISTANCE
