89
EN
Cod. 3541V991 - Rev. 06 - 10/2022
OMNIA ST 3.2
6. SYSTEM EXEMPLARY SCHEMES
> KEY
3 DHW recirculation pipe
6 Water drain Valve
7 Water fill Valve
8 Plant outlet
9 DHW outlet
10 DHW inlet
11 Plant inlet
12 Hydraulic separator and booster pump (not supplied), evaluate the need
for installation in case of high water pressure drop in the plant.
13 DHW boiler
13.1 Electrical Heater DHW boiler (accessory)
14 Plant water inertial tank (accessory)
17 Check valve
17.1 Check valve (not supplied)
18 Bypass valve (not supplied)
21 DHW Expansion Vessel (accessory)
22 DHW safety valve
23 Thermostatic mixing valve(not supplied)
33 Plant expansion vassel (not supplied)
37 Solar circuit expansion vassel (not supplied)
FCU 1...n Air terminal: it can only be used for cooling with radiant floor heating
or for cooling and heating without radiant floor
FHL 1...n Radiant floor / radiator only heating in zones
G Gas Line
L Liquid Line
P_o External pump, (not supplied), to evaluate possible need for installation
according to the plant water pressure drop, managed by the heat pump.
P_s Solar circuit water pump (not supplied)
SV2 Three-way valve for heating / cooling zone (not supplied)
T1_c - Tn_c Cooling request room thermostat (not supplied)
T1_h - Tn_h Heating request room thermostat (not supplied)
Ts Temperature probe for solar panel (accessory)
TWR Integration of towel warmer in bathroom: if connected to the heating
system it must be integrated with an electrical heater (R) actuated by the
control (C) which closes the valve at the same time (M); if not connected to
the system, heating is provided by the electrical heater only (R) actuated
by the control (C)
UI Internal unit
UE External unit
- - - - Electrical connections
NOTE
For the correct operation of the system, a hydraulic bypass must be provided on the system
capable of ensuring sufficient water circulation to avoid the blocking of the heat pump due to
lack of water flow alarm.
This is, for example, essential if the system includes zone valves or thermostatic valves which,
if they go into partial or complete closure, would result in a reduction / lack of water flow with
consequent water flow switch alarm and therefore the blocking the heat pump.
23
12
29
12
UE
UI
8
11
10
9
G
L
3
17.1
FCU1
FHL1 FHLn
Mn
M1
.......
.......
FCUn
M
18
18
C
Mn
14
SV2
M
R
TWR
M1
T1_c
T1_h
Tn_c
Tn_h
33
6
7
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