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Controls "A" - "B" - "C" - "D"
Use of temperature sensor
Internal sensor:
This is used in all installations where the control is wall-
mounted. To activate it, close jumper JP1 as shown in igure A
and on the electronic board screenprint.
Remote sensor
This is used on all installations with unitmounted control. It is
positioned on the return air, close to the fan. To activate it, close
jumper JP1 as shown in igure B and on the electronic board
screenprint.
Fig. A
3
2
1
Internal sensor
NOTE: Factory setting is with activated internal sensor.
Diagnostic warnings
The following alarm situations are indicated:
Blue LED
Flashing
Indicates that the control is in frost
protection mode (
NTC Control
Power supply connection ( ig. 29)
IMPORTANT: Make earth connection prior to any other
electrical connections.
Before proceeding with the unit connection to the mains
supply locate live L and neutral N, then make connections as
shown in the igure 29.
Communication bus connection
Use connector "J9" (ref. B) on the card to connect the
communication "bus" and make sure to respect the polarities
indicated on the card. We suggest that a BELDEN 9842 cable
is used.
IMPORTANT: The unit can be equipped with a "CRC" wire
control or I.R. control which are supplied as accessories. If the
"CRC" control is used, connect it to the "J2" ref. "A" terminal
block and conigure the system.
Window contact (Normally open) (ig. 29a)
Depending on the contact you need to open, use a small lat
blade screwdriver to prize a spring as shown in the igure.
Route the cable through the underlying space.
If the window contact is open for longer than one minute, the
unit is switched to the "frost protect" mode.
The unit will return to normal operation, when the window
contact closes. Connect pin 11 and 12 of connector J2 as shown
in the igure.
28
42N_S 42N_E
130H44_mul_PRINT-A5_09-13.indd 28
Fig. B
JP1
3
2
1
Remote sensor
).
Red LEDs (group on the right)
Indicates the presence of a fault
(sensor failed or not connected)
Green LED ( )
Indicates that the control is in OFF
mode forced by the external contact.
Red / Blue LED
Flashing
Indicates that the control is in
"Autotest" mode.
Autotest
The "Autotest" function is activated by holding the seasonal
changeover button pressed and at the same time pressing the "
" button three times within 1 second. In this way it is possible
to check the starting of all fan coils. The blue and red LEDs will
begin to lash.
Each of the various units will be activated for 10 seconds in the
following sequence:
Low fan speed.
Medium fan speed.
High fan speed.
CV
Motorized cold-water valve.
HV
Motorized hot-water valve (only for B and D control).
Coniguration of the digital input can be made by software, by
setting it to normally open (default) or normally close modes by
means of the "Service tool" programme.
Presence detecting contact (PD) (ig. 29b)
The unit is equipped with a "Presence detecting" contact.
If this input is disabled, the unit follows the pre-set time
coniguration, but when this input indicates a presence state
for at least 5 seconds, the unit is forced to operate in the
"Occupancy" operating mode.
Connection to be made on pin 5 and 6 of connector J2 as
shown in the igure.
Coniguration of the digital input can be made by software,
by setting it to normally open (preferably) or normally close
modes.
Other connections (ig. 29c)
1.
COM IN
2.
COM OUT/Occupancy LED
3.
GND
4.
+12 V d.c.
5.
Discrete Input
6.
GND
7.
Fan Speed In
8.
Setpoint In
9.
GND
10. AMB Air
11. Discrete Input 2
12. GND
}
CRC
"
"
11/09/13 10.17
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