How To Access To The Electric Box; User Terminal Block Connections; Connection Of System Add-Ons - Ferroli OMNIA S 3.2 Installations- Und Bedienungsanleitung

OMNIA S 3.2

7.7.2 How to access to the electric box

1. To dismount the front panel of the indoor unit:
• Partially unscrew the screws A (see "fig. 14 - removing the front panel").
• Pull the panel B out and release it from the upper fixings (see "fig. 14 - 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 correctly 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. 15 - assembly with bottom screws").
fig. 14 - removing the front panel
E
P
Q
E
A
B
E
1 A 1
fig. 16 - view without front panel
To access the terminals of the indoor unit:
• loosen the two screws (detail 1 - fig. 16) under the electric box
• loosen the top screws (detail 2a - fig. 17)
• grip the box and release it (fig. 18)
• turn it forwards (fig. 19) remove the metal sheet of the rear cover (detail 3 - fig. 19) secured with 2 screws (detail 4 - fig. 19).
NB: The rear fastening bracket can be removed (detail 2 - fig. 17) by removing the screw (detail 2b - fig. 17).
Legend:
A Display panel and keyboard (fig. 16)
B Electronic hydronic board (fig. 20)
C Thermal cut-off switch for single-phase electric resistance with manual reset button (detail C1 fig. 20)
D Thermal cut-off switch for three-phase electric resistance with manual reset button (detail D1 fig. 20)

7.7.3 User terminal block connections

The terminal block (detail B fig. 16) 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 6 terminals available on the side of
the terminal block.

7.7.4 Connection of system add-ons

The unit can manage system add-ons, such as an external circulation pump / zone 1 water pump, zone 2
water pump, 3-way mixer valve for zone 2, 3-way diverter valve for not/cold mode and smart grid. All these
elements are controlled by the hydronic board.
2a
2b
2
fig. 17 - view without front panel
Cod. 3541V941 - Rev. 04 - 05/2022
OK
fig. 15 - assembly with bottom screws
fig. 18 - how to release the electric box
NO
4
3
fig. 19 - how to turn the electric box
B
C1
D1
D
fig. 20 - Internal view of electrical cabinet
ID
FUNCTION
TERMINAL
P
For serial connec-
Q Serial Modbus tion to the outdoor
AND
A For connection
to the external
B
Serial Modbus monitoring system
(BMS) or remote
AND
EN
C
NOTES
unit
control
99