QUADRIFOGLIO B
92
EN
cod. 3541D501 - Rev. 03 - 12/2013
fig. 51 - SLAVE
Legend
3.4 Gas connection
B
Before making the connection, make sure the unit is arranged for operation with
the type of fuel available and carefully clean all the pipes of the gas system to
remove any residues that could affect proper functioning of the boiler.
The gas must be connected to the relevant connection (see fig. 76 and fig. 77) in con-
formity with the current regulations, using a continuous-surface stainless steel hose,
placing a gas cock between the system and the boiler.
A
To allow easy opening of the burner door during periodic maintenance,
the last section of the connection between the system and the unit must
have a continuous-surface stainless steel hose.
fig. 52
Make sure that all gas connections are tight. The capacity of the gas meter must be suf-
ficient for the simultaneous use of all units connected to it. The diameter of the gas pipe
leaving the boiler is not decisive for choosing the diameter of the pipe between the unit
and the meter; it must be chosen according to its length and pressure losses, in conform-
ity with the current regulations.
B
Do not use the gas pipes to earth electrical appliances.
In case of connection in cascade, make sure to install a fuel shutoff valve ex-
ternally with respect to the modules.
3.5 Electrical connections
Connection to the electrical grid
B
The unit's electrical safety is only guaranteed when correctly connected to an
efficient earthing system executed according to current safety standards. Have
the efficiency and suitability of the earthing system checked by professionally
qualified personnel. The manufacturer is not responsible for any damage
caused by failure to earth the system. Also make sure that the electrical system
is adequate for the maximum power absorbed by the unit, as specified on the
boiler dataplate.
The boiler is prewired and provided with a Y-cable and plug for connection to the elec-
tricity line. The connections to the grid must be made with a permanent connection and
equipped with a bipolar switch whose contacts have a minimum opening of at least 3
mm, interposing fuses of max. 3A between the boiler and the line. It is important to re-
spect the polarities (LINE: brown wire / NEUTRAL: blue wire / EARTH: yellow-green
wire) in making connections to the electrical line. During installation or when changing
the power cable, the earth wire must be left 2 cm longer than the others.
B
The user must never change the unit's power cable. If the cable gets damaged,
switch off the unit and have it changed solely by professionally qualified person-
nel. If changing the electric power cable, use solely
“HAR H05 VV-F”
3x0.75
mm2 cable with a maximum outside diameter of 8 mm.
Room thermostat (optional)
B
CAUTION: The room thermostat must have clean contacts. CONNECTING
230 V. TO THE TERMINALS OF THE ROOM THERMOSTAT WILL IRREPA-
RABLY DAMAGE THE ELECTRONIC CARD.
When connecting a remote timer control or a timer switch, do not take the pow-
er supply for these devices from their cut-out contacts. Their power supply must
be taken with a direct connection from the mains or with batteries, depending
on the kind of device.
External probe (optional)
Connect the probe to the respective terminals. The maximum permissible length of the
electric cable connecting the boiler - external probe is 50 m. A common 2-wire cable can
be used. The external probe should preferably be installed on the North, North-West wall
or on the wall facing most of the main living-room. The probe must never be exposed to
the early morning sun, and in general (as far as possible) it should not be exposed to
direct sunlight; protect it if necessary. In any case, the probe must not be installed near
windows, doors, vents, flues or heat sources that could affect the reading.
fig. 53 - Inadvisable positioning of external probe
Accessing the electrical terminal block
The electrical terminal block is located in the rear of the control panel. Make the connec-
tions as shown in the wiring diagram on fig. 87 and run the cables through the special
cable glands.
fig. 54 - Electrical terminal block
For connection in cascade
NOTE:
The boiler's electronics can manage a
maximum of 6 modules
.
1.
Connect the modules as shown in fig. 55 (
example con 4 modules
)
fig. 55 - Connection in cascade
A
1st Module
B
2nd Module
C
3rd Module
D
4th Module
139
Remote Control: it can be installed in place of 72 to manage the request of the 1st zone (direct)
302
Remote reset input (230Vac): the example shows the connection of a double-pole switch at 230Vac, allowing
the resetting of a block type fault
357
Fault indication (230Vac): the example shows the connection of a lamp at 230Vac
19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
37 38 39 40 41 42 43 44
FUSE
3.15A
L
N
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18
357
302
N
L
37 38 39 40 41 42 43 44
19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
FUSE
3.15A
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18
A
B
C
D
31 32
33
34
35
36
31 32
33
34
35
36
31 32
33
34
35
36
31 32
33
34
35
36
