Electrical connections
Before any maintenance operation,
ensure that the general power supply is switched off.
Electrical installation must be performed in accordance with current regulations.
OFF
ON
1
2
U0629273-A
The electrical diagram for the hydraulic unit is shown on
fig. 49, page 74
.
fig. 33 - Overall layout of electrical connections for a simple installation (1 heating circuit)
Outside sensor
Cable 2 x 0.75 mm²
Interconnection between
outdoor unit and hydraulic unit
Phase, Neutral, Earth, Communication bus)
Cable 4 G 1.5 mm²
Electrical backup power supply
(see table below)
DHW power supply
(phase, neutral, earth) Cable 3 G 1.5 mm²
General electrical supply
(phase, neutral, earth) (see table below)
Electrical
Board
or
or
or
or
Room sensor A78 (battery/option)
Room sensor A59 (battery/option)
Room sensor A75 (option)
Cable 2 x 0.5 mm²
Room sensor A59 (option)
Cable 2 x 0.5 mm²
Typass ATL (option)
Cable 3 x 0.5 mm²
- 34 -
alfea Excellia HP Duo A.I. / Installation / 1945 - EN