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• make sure all the measurements are correct, then drill holes in
the wall using a drill and point with the diameter given previously
• fix the plate to the wall by the supplied anchor screws
• make hydraulic connections.
After installing the boiler, the screws D
After installing the boiler and connecting it to the water and gas
supplies, fit the lower cover (A-B, fig. 3b) so that its hooks slip into
the relative slots in the lower part of the boiler. Fix the lower cover
with the screw C (fig. 3c) contained in the documentation envelope
in the boiler.
3 - HYDRAULIC CONNECTIONS
Position and dimensions of hydraulic connections are specified in
figure 2:
A - CH return
B - CH delivery
C - gas connection
D - DHW outlet
E - DHW inlet
F -
Support plate
G - Pre-installation template
If water hardness exceeds 28°Fr, it is recommended to use water
softeners, to prevent any limestone deposit in boiler due to exces-
sively hard water.
4 - GAS CONNECTION
Before connecting appliance to gas pipe network, check the fol-
lowing:
• regulations in force are met
• gas type used is the same as set for appliance operation
• pipes are clean.
Gas must be piped externally. If the pipe goes through a wall it must
go through the central opening in the lower part of the template. It
is recommended to install an appropriately sized filter on the gas
line in case gas from the mains contains some small solid particles.
After installation make sure that all the joints have been made airtight
conforming to standard installation practices.
5 - ELECTRIC CONNECTION
To access the electrical connections, proceed as follows:
- unscrew the lower cover fixing screw (C, fig. 3c)
- pull the cover towards you and remove (A-B) (fig. 4a)
- loosen the fixing screws (D) and remove the shell (fig. 3a)
- lift up the panel and turn it forwards
- open the terminal board covers making them slide in the direc-
tion of the arrows (fig. 4b: E high voltage connections 230 V, F
low voltage connections, G.
Connect the appliance to the mains power supply with a switch
featuring a distance of at least 3,5 mm (EN 60335-1, category III)
between each wire.
The appliance uses alternating current at 230 Volt/50 Hz and com-
plies with EN 60335-1 standard. Connect the boiler to a safe earth
circuit according to current legislation.
Live and neutral (L-N) connections should also be respected.
The boiler can operate with phase-neutral or phase-phase power
supply. For floating power supply, without an earth-bonded conduc-
tor, it is necessary to use an insulation transformer with secondary
anchored to ground.
The earth conductor must be a couple of cm longer than
the others.
Gas and/or water pipes may not be used to earth electri-
cal equipment.
The installer is responsible for making sure that the
appliance has an adequate earthing system; the manu-
facturer shall not be held liable for eventual damages
caused by incorrect usage or failing to earth the boiler.
(fig. 3a) can be removed.
1
3/4"
3/4"
3/4"
1/2"
1/2"
Use the supplied power cable to connect the boiler to the mains
power supply.
Connect the ambient thermostat and/or time clock as shown in the
electrical diagram.
When replacing the power cable, use a HAR H05V2V2-F cable,
3 x 0,75 mm
, Ø max. external 7 mm.
2
6 - FILLING AND EMPTYING THE SYSTEM
The central heating system can be filled up once the water mains
have been connected up.
This must be done while the installation is cold by:
• giving two or three turns to the cap of the automatic air vent valve
(A, fig. 5a and 5b) to open it;
• making sure the cold water inlet tap is open
• opening the filling tap (C) until the pressure on the hydrometer
(D) is between 1 and 1,5 bar (blue zone) (fig. 5a and 5b).
Close the filling tap after filling it up.
The boiler is equipped with an efficient air separator so that there
is no need to do anything manually.
The burner only ignites when air venting has finished.
NOTE: even if the boiler is fitted with a semi-automatic filling system,
open tap C to fill the circuit the first time.
Empty the system by:
• switching off the boiler
• connect the rubber hose, supplied standard, to the boiler drain
valve (E, fig. 5a and 5b)
• loosening the valve by hand (E)
• emptying out the lowest parts of the system.
DHW system emptying
The hot water system must be emptied every time there is risk of
freezing by:
• turning off the tap at the mains
• turning on all the hot and cold taps
• emptying out the lowest parts of the system.
ATTENTION
The safety valve outlet (B) must be connected to a suitable col-
lection system.
The manufacturer shall not be held liable if the safety valve should
eventually cause flooding.
7 - FUMES EXHAUSTION AND BURNING
AIR SUCTION
Boiler is equipped with a system controlling proper exhaustion of
combustion products - fume thermostat (12a-12b, fig. 82a-82b);
in case of abnormality, this system immediately stops appliance
operation. Press the
button to restore functionning condition. If
abnormality persists, do not perform any action, but immediately
call Technical Service; technicians will correct fume exhaustion
defect and test operation.
Refer to regulations in force for burnt product exhaustion.
It is compulsory using rigid pipes, junctions between elemen-
ts must be tight and all components must be resistant to tem-
perature, condensates and mechanical stresses.
Device controlling proper fume exhaustion must never be
deactivated. Use original spare parts only when replacing it.
Exhaustion ducts which are not insulated can be dangerous.
Openings for burning air must comply with regulations in for-
ce.
If condensates are produced, insulate exhaustion duct.
Fig. 6b shows the top view of boiler with reference measures
for fume outlet distance between centres, from boiler sup-
port plate.
6
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