10
Giacomini S.p.A.
Via per Alzo 39, 28017 San Maurizio d’Opaglio (NO) Italia
+39 0322 923372 - giacomini.com
Electrical connections
Electronic board
• The HIU is powered electrically by connecting the 230 V mains supply to the three-pin terminal board M1 of the electronic board.
• The remote control /chronothermostat (K480Y002) is connected to terminals 23-24 of the electronic board.
• The external temperature probe (K365PY002) is connected to terminals 27-28 of the electronic board.
• The optional safety thermostat (K373/K373I), is connected to terminals 39-40 of the electronic board.
• Multizone additional control to terminals 21-22 on the electronic board (additional thermostats to be ordered separately).
24 23 22 21 20 19
32 31 30 29 28 27 26 25
40 39 38 37 36 35 34 33
42 41
1 2 3 4 5 6 7 8
9 10 11 12 13
14 15
L N
M1
18 17 16
SAFETY
THERMOSTAT
K373 / K373I
REMOTE CONTROL
K480Y002
MULTIZONE
ADDITIONAL
CONTROL
EXTERNAL
TEMPERATURE
PROBE K365P
230 Vac
WARNING.
Work on electrical components must be carried out by qualified personnel. Make sure that the power supply is disconnected when making
connections.
Electric technical data
• Electronic board power supply of the satellite: 230 V
• Supply voltage frequency: 50÷60 Hz
• Ambient operating temperature: -20÷60 °C
• Ambient storage temperature: -20÷80 °C
• Humidity: max 90 % @ 40° C non-condensing
• Maximum absorption: 7 VA
• Maximum length of external probe cable: 30 m
• Maximum length of remote control cable: 30 m
M-Bus
To connect the M-Bus data transfer cable to the
concentrator, refer to the datasheet of the thermal energy
meter used.
Electrical cabinet
B
C
On the back of the HIU there is an IP55 electric box
containing the electronic control board.
To access the electric cabinet (Ref. C) unscrew the two
screws (Ref. A) to release the metal bracket (Ref. B) on
which the electric cabinet is housed.
Then pull out the metal bracket by pulling it up.
