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Les langues disponibles
Connection kits
The connection kits shown in are supplied standard fig. 16
b
b4
d
c
e
d1
d
c1
c
c
S
L
M
N
P
Q
b-b1-b4
a1
S
R
M N P
Q
b3-b4
a-a2-a3
fig. 16 - Plumbing connections kit
a
3/4" union assembly for Ø18 pipe
a1
Union assembly for Ø14 pipe
a2
1/2" gas cock
a3
Cock 7/8"
b
System delivery connection pipe
b1
System return connection pipe
b2
Gas system connection pipe
b3
Cold water inlet connection pipe
b4
Domestic hot water outlet connection pipe
c
3/4" ring
c1
1/2" ring
d
De 24 seal
d1
De 18.5 seal
E
Safety valve
L
OT 58 nipple
M
O-ring
N
OT 58 stop collar
P
Copper washer
Q
OT58 union
R
Ball cock
S
Female sleeve
7
Gas inlet
8
Domestic hot water outlet
9
Cold water inlet
10
System delivery
11
System return
System water charcteristics
In the presence of water harder than 25° Fr (1°F = 10ppm CaCO
treated water is advisable in order to avoid possible scaling in the boiler. The treatment
must not in any case reduce the hardness to values below 15°F (Decree 236/88 for uses
of water intended for human consumption). Water treatment is indispensable in the case
of very large systems or with frequent replenishing of water in the system. If partial or
total emptying of the system becomes necessary in these cases, it is advisable to refill it
with treated water.
38
EN
10
a
8
7
a1
a2
a3
b2
b3
b1
d-d1
d1
c1
), the use of suitably
3
cod. 3540S814 -
Antifreeze system, antifreeze fluids, additives and inhibitors
The boiler is equipped with an antifreeze system that turns on the boiler in heating mode
when the system delivery water temperature falls under 6°C. The device will not come
on if the electricity and/or gas supply to the unit are cut off. If it becomes necessary, it is
permissible to use antifreeze fluid, additives and inhibitors only if the manufacturer of
these fluids or additives guarantees they are suitable for this use and cause no damage
to the heat exchanger or other components and/or materials of the boiler unit and sys-
tem. It is prohibited to use generic antifreeze fluid, additives or inhibitors that are not ex-
pressly suited for use in heating systems and compatible with the materials of the boiler
unit and system.
9
11
3.4 Gas connection
B
Before carrying out the connection, make sure the unit is arranged for the type
of fuel available and carefully clean all the system gas pipes to remove any res-
idues that could affect proper boiler operation.
a
The gas must be connected to the relevant union (see figure on cover) in conformity with
the current regulations, with a rigid metal pipe or with a continuous surface flexible s/steel
tube, installing a gas cock between the system and boiler. Make sure all the gas connec-
tions are tight. The gas meter capacity must be suitable for the simultaneous use of all
the units connected to it. The diameter of the gas pipe leaving the boiler does not deter-
mine the diameter of the pipe between the unit and the meter; it must be chosen accord-
ing to its length and pressure losses, in conformity with the current regulations.
B
Do not use the gas pipes to earth electrical appliances.
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. 17 - Inadvisable positioning of external probe
/201
(Rev. 00)
ECONCEPT ST
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