8
7
b
2
3
d
a
1
c
2
14
INS
TALLER
US
ER
MAINTEN
AN
CE TECHNI
CI
AN
1.9 ELECTRICAL CONNECTION.
The appliance has an IPX5D protection degree; electrical safety of
the appliance is achieved only when it is connected properly to an
efficient 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 efficient earthing system or failure
to comply with the IEC reference standards.
• Open the control panel connections compartment
(Fig. 7).
To carry out electrical connections, all you have to do is open
the connections compartment as follows:
- Remove the front panel (Fig. 52).
- Disassemble the cover (b)
1) Loosen the screw (a).
2) Press the two hooks on the connections compartment cover.
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 a special “X” type
power cable without plug.
ATTENTION:
The 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.
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 man-
ufacturer 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.
The power cable must be laid as shown (Fig. 4).
If the network fuse on the integrated P.C.B. needs replacing, this
must also be done by qualified personnel: use a 3.15 A F (fast) 250
V fuse (size 5 x 20).
For the main power supply to the appliance, never use adapters,
multiple sockets or extension leads.
Installation with system operating at direct low temperature.
The boiler can directly supply a low-temperature system by setting
the flow temperature adjustment range “t0” and “t1” (Par. 3.15).
In this situation it is good practice to insert a relevant safety kit
(optional) made up from a thermostat (with adjustable tempera-
ture). The thermostat must be positioned on the system flow pipe
at a distance of at least 2 metres from the boiler.
1.10 REMOTE CONTROLS AND ROOM CHRONO-
THERMOSTATS (OPTIONAL).
The boiler is prepared for the application of room chrono-ther-
mostats or remote controls, which are available as optional kits
(Fig. 8).
All Immergas chrono-thermostats are connected with 2 wires
only. Carefully read the user and assembly instructions contained
in the accessory kit.
