13
7
6
2
b
a
2
1
1
a
3
c
d
13
INS
TALLER
US
ER
MAINTEN
AN
CE TECHNI
CI
AN
To protect from possible dispersions of DC voltage, it is necessary
to provide a type A differential safety device.
If the power supply cable is damaged, it must be replaced by a
special cable or assembly, which are only available from the manu-
facturer or its After-sales Service. It is recommended to contact
a qualified company (e.g. the Immergas Authorised After-Sales
Technical Assistance Service) for replacement to avoid a hazard.
Th
e power cable must be laid as shown (Fig. 5).
If the network fuse on the connection terminal block needs re-
placing, this must also be done by qualified personnel: use a 3.15
A fast fuse.
For the main power supply to the appliance, never use adapters,
multiple sockets or extension leads.
Installation with system operating at direct low temperature.
Th
e boiler can directly supply a low-temperature system by setting
the
fl
ow temperature adjustment range “t0” and “t1” (Par. 3.15). In
this situation it is good practice to insert a relevant safety kit (op-
tional) made up from a thermostat (with adjustable temperature).
Execute connection to terminal boards 14 and 15, eliminating
jumper X70 (Fig. 36).
Th
e thermostat must be positioned on the
system
fl
ow pipe at a distance of at least 2 metres from the boiler.
1.9 REMOTE CONTROLS AND ROOM CHRONO
-
THERMOSTATS
(
OPTIONAL
)
.
The boiler is prepared for the application of room chrono-
thermostats or remote controls, which are available as optional
kits (Fig. 7).
All Immergas chrono-thermostats are connected with 2 wires
only. Carefully read the user and assembly instructions contained
in the accessory kit.
1.
8
ELECTRICAL CONNECTION.
Th
e appliance has an IPX5D protection degree; electrical safety of
the appliance is achieved only when it is connected properly to an
e
ffi
cient earthing system, as specified by current safety standards.
ATTENTION:
the manufacturer declines any respon-
sibility for damage or physical injury
caused by failure to connect the boiler
to an e
ffi
cient earthing system or failure
to comply with the IEC reference standards.
•
Open the control panel connections compartment
(
Fig.
6
)
.
To carry out electrical connections, all you have to do is open
the connections compartment as follows.
- Remove the front panel (Fig. 49).
- Remove the cover (Ref. b Fig. 6).
1) Loosen the two screws (a).
2) Press the two hooks on the cover (b).
3) Remove the cover (b) from the control panel (c).
- At this point, it is possible to access the terminal board (d).
Also ensure that the electrical installation corresponds to maxi-
mum absorbed power specifications as shown on the boiler data
nameplate. Boilers are supplied complete with an “X” type power
cable without plug.
ATTENTION:
Th
e power supply cable must be con-
nected to a 230V
±
10
%
/ 50Hz mains
supply respecting L-N polarity and
earth connection; this network must
also have a multi-pole circuit breaker
with class III overvoltage category in
compliance with installation regulations.
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