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3.7 Electric connection
To access the electrical wiring, proceed as follows:
- turn off the main switch on the system
- loosen the fixing screws (A) and remove the shell (fig. 6)
- release the panel and turn it forwards (fig. 7)
- unscrew the two screws of the small cover on the electronic
board to have access to the terminals (fig. 10).
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 operates with an alternating current of 230 Volt/50
Hz, has a power input of 110W (12 R.S.I.), 123W (25 C.S.I.-25
R.S.I.), 129W (30 C.S.I.), 148W (35 R.S.I.) and 153W (38 C.S.I.)
and complies with EN 60335-1 standard.
Connect the boiler to an safe earth circuit according to current leg-
islation.
The installer is responsible for ensuring the appliance is suit-
ably earthed; the manufacturer declines all liability for any
damage deriving from incorrect or omitted earthing.
Live and neutral (L-N) connections should also be respected.
The earth conductor must be a couple of cm longer than the
others.
The boiler can operate with phase-neutral or phase-phase power
supply.
For floating power supply, without an earth-bonded conductor, it
is necessary to use an insulation transformer with secondary an-
chored to ground.
Gas and/or water pipes may not be used to earth electrical
equipment.
Use the supplied power cable to connect the boiler to the mains
power supply.
Connect the ambient thermostat and/or external programmable
timer clock as shown in the electrical diagram.
When replacing the power cable, use a HAR H05V2V2-F cable,
3x 0,75 mm2, max. external Ø 7 mm.
3.8 Filling the heating system
Once the hydraulic connections have been carried out, fill the heat-
ing system.
This operation must be carried out with cold system, according to
the following instructions (fig. 17):
- open the automatic air vent by turning the plug on the lower valve
(A) and upper valve (E) two or three turns, to bleed the air con-
tinuously, leave valve plugs A-E open
- ensure that the cold water inlet tap is open
- open the filling tap (B) (external to the system for R.S.I. model)
until the pressure indicated by the water gauge is between 1 and
1.5 bar
- close the filling tap.
Note: the boiler is bled automatically via the two automatic bleed
valves A and E, positioned on the circulator and inside the air dis-
tribution box respectively. If you encounter problems bleeding the
boiler, proceed as described in paragraph 3.11.
3.9 Draining the heating system
Before starting to drain the system, switch off the electrical supply
by turning off the main switch of the system.
Close the shut-off devices on the heating system.
Manually loosen the system drain valve (C).
The water from the system is discharged through the outlet collec-
tor (D).
3.10 Draining the domestic hot water system (only C.S.I.
model)
When there is risk of frost, the domestic hot water system must be
emptied in the following way:
- close the main tap of the water mains
- open all the hot and cold water taps
- drain the lowest points.
ATTENTION
The collector must be connected, by means of a rubber pipe (not
supplied),
to a suitable collection and evacuation system in the storm water
outlet and in compliance with current regulations. The external di-
ameter of the collector is 20 mm: we therefore suggest using an
Ø18-19 mm pipe, to be closed with a suitable clamp (not supplied).
The manufacturer is not responsible for any damage caused by the
lack of a collection system.
3.11 Suggestions for correctly venting the air from the
heating circuit and the boiler
When installing the boiler or when carrying out extraordinary main-
tenance operations, proceed as follows:
1. Use a CH11 wrench to open the manual breather valve located
over the air distribution box (fig. 5): connect the hose supplied
with the boiler to the valve in order to discharge the water into
an external container.
2. Open the manual filling tap on the hydraulic assembly and wait
until water starts flowing from the valve.
3. Power the boiler leaving the gas tap closed.
4. Use the room thermostat or the remote control panel to activate
request for heat so that the three-way will turn to heating.
5. Turn on a tap to activate request for hot water (for instanta-
neous boilers only; use the water heater thermostat for boilers
just for heating connected to an external water heater) for an
interval of 30" every minute to make the three-way cycle from
heating to hot water and vice versa about ten times (the boiler
will be go into alarm as there is no gas under these circum-
stances, it must therefore be reset every time this happens).
6. Continue the sequence until water only comes out of the man-
ual air vent valve and the flow of air has finished; close the
manual air vent valve at this point.
7. Make sure the system is at the correct pressure (1 bar is ideal).
8. Close the manual filling tap on the hydraulic assembly.
9. Open the gas tap and switch on the boiler.
3.12 Fumes exhaustion and air suction
For fumes exhaustion, refer to the current local and national regu-
lations. Always comply with local standards of the Fire Department,
the Gas Company and with possible municipal dispositions.
The release of combustion products is assured by a centrifugal fan
placed inside the combustion chamber and its correct operation
is constantly checked by a pressure switch. The boiler is supplied
without the flue gas outlet/air suction kit, since it is possible to use
the accessories for appliance with a forced draught sealed cham-
ber that better adapts to the installation characteristics.
It is essential for flue gas release and the restoration of boiler
combustion air to use certified pipes and that connection is car-
ried out correctly as indicated by the instructions supplied with the
flue gas accessories. With only one smoke pipe you can connect
more pieces of appliance provided that every piece of appliance is
sealed chamber type.
POSSIBLE OUTLET CONFIGURATIONS (FIG. 11)
B23P/B53P Suction indoors and discharge outdoors
C13-C13x Discharge via concentric wall outlet. The pipes may
leave the boiler independently, but the outlets must be concentric
or sufficiently close
together to be subjected to similar wind conditions (within 50 cm)
C23 Discharge via concentric outlet in common smoke pipe (suc-
tion and discharge in the same pipe)
C33-C33x Discharge via concentric roof outlet. Outlets as for C13
C43-C43x Discharge and suction in common separate smoke
pipes, but subjected to similar wind conditions
C53-C53x Separate discharge and suction lines on wall or roof and
in areas with different pressures. The discharge and suction lines
must never
be positioned on opposite walls
C63-C63x Discharge and suction lines using pipes marketed and
certified separately (1856/1)
C83-C83x Discharge via single or common smoke pipe and wall
suction line
C93-C93x Discharge on roof (similar to C33) and air suction from a
single existing smoke pipe
"FORCED OPEN" INSTALLATION (TYPE B23P/B53P)
Fumes outlet duct Ø 80 mm (fig. 12)
The fumes outlet duct can be aimed in the most suitable direction
for installation needs.
To install follow the instructions supplied with the kit.
In this configuration, the boiler is connected to the Ø 80 mm fumes
Mynute Green C.S.I. E - R.S.I. E
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