42
EN
Cod. 3542B230 - Rev. 00 - 02/2022
OMNIA S HYBRID H 3.2
7.9.1 Opening the front panel
1.
To dismount the front panel of the indoor unit:
Partially unscrew the screws A (see "fig. 27 - removing the front panel").
Pull the panel B out and release it from the upper fixings (see "fig. 27 - removing
the front panel").
2.
Make the connections referring to the functional electrical diagram present in
this manual.
3.
Proceed in reverse order to reassemble the front panel. Make sure that it is cor-
rectly attached to the upper fixing and completely resting on the side panels. The
head of the screw “A”, once tightened, must be positioned as indicated in "fig. 28
- assembly with bottom screws").
fig. 27 - removing the front panel
OK
NO
fig. 28 - assembly with bottom screws
7.9.2 User terminal block connections
The terminal block (detail 4b "fig. 29 - User terminal block") is located on the left
side of the boiler electric box. The terminal block is a male-female connector strip.
There is an identification label of the 11 terminals available on the side of the
terminal block.
4b
R
R
A
B
E
P
Q
E
H
L1
C
fig. 29 - User terminal block
ID
TERMINAL
FUNCTION
NOTES
R
For factory testing
Reserved
R
For factory testing
Reserved
P
Serial Modbus
For serial connection to the
outdoor unit
Q
AND
A
Serial Modbus
For connection to the external
monitoring system (BMS) or
remote control
B
AND
H
For connection to room
thermostats
For details, see the following
paragraph "H-L1-C - Digital
inputs for room thermostat"
L1
C
H-L1-C - Digital inputs for room thermostat
If the digital inputs H-L1-C are enabled by parameter 6.1 and parameter 5.3
(see “9.3.2 Heat pump service menu" on page 60), they have priority over
ON/OFF settings and mode change (only for Method A) from user interface
.
Digital inputs not enabled (default)
Set par. 6.1 = 0
Digital inputs enabled
•
Method A - operating mode setting
The request can occur, for example, via 2 Heat and Cool operating status switches:
Set par. 6.1 = 1 (mode set).
H-L1 (Heat)
L1-C (Cool)
Operating status
Closed
Open
System heating mode
Open
Closed
System cooling mode
Closed
Closed
System cooling mode
Open
Open
Off on system
OT
OT
A
B
E
P
Q
E
H
L1
C
HEAT (H)
COOL (C)
fig. 30 - Method A thermostat (for mode change)
•
Method B - Operating request on system
The request may come, for example, from a room thermostat. The system will
operate in the mode set by the user interface.
Set par. 6.1 = 2 (one zone)
Operating status:
H-L1
L1-C
Operating status
Closed
Not used
Used by the system
Open
Not used
Off on system
OT
OT
A
B
E
P
Q
E
H
L1
C
TZ
fig. 31 - Method B thermostat ( 1 zone)
