Mynute Boiler B.A.I.
15
-
Anti-legionellosis function:
Legionellosis is an illness that can
be caught by breathing in small drops of water (aerosol) contain-
ing the legionellosis bacillus (this bacterium is found in rivers and
lakes all over the world). The bacterium can be eliminated by
heating the storage water to a temperature of over 50/55 °C.
At least every 2/3 days, therefore, the domestic hot water tem
-
perature selector (fig. 7a) should be moved to maximum tem
-
perature in order to heat the water in the storage boiler to 60°C
and remain at this temperature for at least 5 minutes.
3 - INSTALLATION REGULATIONS
This natural draught boiler is intended to be connected only to
a flue shared between multiple dwellings in existing buildings
that evacuates the residues of combustion to the outside of
the room containing the boiler. It draws the combustion air
directly from the room and incorporates a draught diverter.
Due to lower efficiency, any other use of this boiler shall be
avoided and would result in higher energy consumption and
higher operating costs.
3.1 Installation regulations
Installation must be carried out by qualified personnel.
Always comply with national and local regulations.
POSITION
Class B appliances cannot be installed in bedrooms, bathrooms or
showers, or in rooms with open flues without adequate ventilation.
It is imperative that the room in which a gas appliance is installed
has a sufficient inflow of air to supply the quantity of air necessary
for normal combustion and ensure proper ventilation of the room
itself. Natural direct ventilation with external air must be provided
for via:
- permanent openings in the walls of the room in which the ap-
pliance is installed leading outdoors. These openings must be
made in such a way as to ensure that the orifices on both the
internal and external side of the wall cannot be obstructed or be
reduced in effective diameter, the orifices themselves must be
protected with metal grilles or similar means and must be situ-
ated near floor level and in a location that does not interfere with
the function of the flue exhaust system (where this position is
not possible, the diameter of the ventilation openings must be
increased by at least 50%),
- while single or multiple branched the ventilation ducts may be used.
The ventilation air must be sourced directly from outside the build-
ing, away from sources of pollution. Indirect ventilation, with air
drawn from rooms next to the room in which the appliance is in-
stalled, is permitted, provided that the limitations indicated by cur
-
rent local regulations. The room in which the boiler is to be installed
must be adequately ventilated in compliance with applicable leg-
islation. Detailed prescriptions for the installation of the flue, gas
piping and ventilation ducting are given in current local regulations.
The aforementioned regulations also prohibit the installation of
electric fans and extractors in the room in which the appliance is
installed. The boiler must have a fixed outward leading exhaust
duct with a diameter not smaller than the exhaust hood collar. Be-
fore fitting the exhaust outlet connector to the flue, check that the
flue has adequate draught and has no restrictions and that the ex
-
hausts of no other appliances are connected to the same flue pipe.
When connecting to a pre-existing flue pipe, check that the latter
is perfectly clean, as deposits may detach from the wall of the pipe
during use and obstruct the passage of the flue gases, creating a
situation of severe danger for the user.
Mynute Boiler B.A.I.
can be installed indoors.
The boiler has protection that guarantees correct operation with a
temperature range from 0°C to 60°C.
To take advantage of protections, the appliance must be able to
start up, since any lockout condition (for example, absence of gas or
electrical supply, or safety intervention) deactivates the protections.
MINIMUM DISTANCES
In order to have access to the boiler to perform regular mainte-
nance operations, respect the minimum spaces foreseen for instal
-
lation (fig. 2).
For correct appliance positioning:
- do not place it on a cooker or other cooking device
- do not leave inflammable products in the room where the boiler
is installed
- heat sensitive walls (for example, wooden walls) must be pro
-
tected with proper insulation.
Keep the distance of 370 mm from the bottom of the boiler
to the furniture casing: there must be sufficient space for
dismantling operations if the magnesium anode has to be
cleaned.
IMPORTANT
Before installation, wash every system piping carefully in order
to remove any residues that may impair the operation of the ap-
pliance. Under the safety valve, install a water collecting funnel
with the corresponding discharge in the event of leaks due to the
overpressure of the heating system. The domestic hot water circuit
does not need a safety valve, but make sure that the pressure of
waterworks does not exceed 6 bar. In case of doubts, install a pres
-
sure reducer. Prior to ignition, make sure that the boiler is designed
to operate with the gas available; this can be checked by the mes-
sage on the packaging and the adhesive label indicating the gas
type. It is very important to highlight that in some cases the smoke
pipes are under pressure and therefore, the connections of several
elements must be airtight.
ANTI-FREEZE SYSTEM
The boiler is fitted as standard with an automatic anti-freeze sys
-
tem that activates when the temperature of the water in the primary
circuit falls below 5 °C. To take advantage of this protection (based
on burner operation), the boiler must be able to switch itself on;
any lockout condition (e.g. lack of gas/electricity supply, or safety
device intervention) therefore deactivates the protection. The anti-
freeze protection is also active when the boiler is on standby. In
normal operation conditions, the boiler can protect itself against
freezing. If the machine is left unpowered for long periods in areas
where temperatures may fall below 0 °C, and you do not want to
drain the heating system, you are advised to add a specific, good
quality anti-freeze liquid to the primary circuit. Carefully follow the
manufacturer's instructions with regards not only the percentage of
anti-freeze liquid to be used for the minimum temperature at which
you want to keep the machine circuit, but also the duration and
disposal of the liquid itself.
For the domestic hot water part, we recommend you drain the cir
-
cuit. The boiler component materials are resistant to ethylene gly-
col based anti-freeze liquids.
3.2 Securing the boiler to the wall and hydraulic con-
nections
Support plate and integrated pre-installation template are provided
for with the boiler (fig. 3).
Mounting instructions:
- fix the boiler support plate (
F
) with the template (
G
) to the wall
and use a plumb to check that it is perfectly horizontal
- trace out 4 holes (ø 6 mm) for fixing the boiler support plate (
F
)
and 2 holes (ø 4 mm) for fixing the preinstallation template (
G
)
- 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.
The position and size of the hydraulic connections are indicated
below:
A
CH return
3/4”
B
CH delivery
3/4”
C
gas connection 3/4”
D
DHW output
1/2”
E
DHW input
1/2”
In case of replacement of Beretta boilers from previous type, there
is an adaptation kit of hydraulic connections available.
