RN MINI
Pag. 12 / 44
It is extremely important to follow the instructions for use reported on this booklet and it is strictly forbidden to use
the device for purposes other than the ones described in these instructions.
The devices described herein ARE NOT SUITABLE FOR UNDERWATER USE even if their functions remain unaffected
when submerged in water for a short period of time.
Their autonomy depends on the air reserve available. Refer to Table 1 for more information.
Always use breathable air according to the EN 12021 standard.
2.
DETAILED DESCRIPTION
The breathing apparatus
RN
MINI
consists of the following elements:
Carrying system
Air pressure cylinder
Pressure reducer
High pressure gauge with connection hose
Demand valve with audible warning device
Full face mask
and any
Accessories
Reference figures:
Fig. 1 for RN MINI
Fig. 2 for the pressure reducer
Fig. 3 for the demand valve
Fig. 4 for the full-face mask
2.1.
Carrying system (pos. A fig. 1)
The carrying system has a back-plate of anatomical shape (
a1
), made of self-extinguishing material, with adjustable
shoulder straps with padding (
a2
) and waist belt (
a3
), to make sure the device can be comfortably adapted to any
individual. On the left shoulder strap a band with a Velcro closure (
a4
) keeps in place the pressure gauge and the
demand valve hoses.
The cylinder strap (
a5
) allows to mount a 3 l cylinder and locks it in place thanks to a snap buckle.
2.2.
Cylinder with valve (pos. B fig. 1)
The RN MINI SCBA are equipped with a steel or composite cylinder whose technical features are summarized in the
following table:
Tab.1
–
Technical features of the cylinders
Capacity
(l)
Pressure
(bars)
Diameter
(mm)
Length
(mm)
Weight
empty (kg)
Reserve*
(l)
Autonomy**
(min.)
3 (steel)
300
115
420
5
830
27
3 (composite)
300
115
440
1.9
830
27
*at a pressure of 300 bars, the PxV formula is no longer used to calculate the volume of air available, you must consider the
compressibility factor, which leads to a reduction of about 8%.
**autonomy achieved for an average consumption of about 30 l/min. per operator.
The cylinders are equipped with hand wheel valves (
b1
) with threads connection according to the EN 144-1 standard
as far as the connection between the valve and cylinder is concerned (cylinder neck thread M18x1.5) and to the EN
144-2 for nominal operating pressures of 300 bar as far as the connection between the valve and pressure reducer is
concerned. The cylinders and valves are in accordance with the PED 2014/68/UE and/or TPED 2010/35 EU Directives
and with the national regulations of the countries in which they are marketed. They are also provided with all the
relevant documents (declarations of conformity, test certificates, instructions for use).
The identification data is printed on the cylinders and valves as required by the applicable laws or on a special
permanent label applied to the cylinder (composite cylinders). The cylinders are painted according to the EN 1083-3
standard. Breathable air is provided by the cylinders and must always be in accordance with the EN 12021 standard.
The valves of the cylinders can be provided with the Excess Flow Valve accessory upon request (see accessories).
2.3.
Pressure reducer (pos. C in Fig. 1, Fig. 2)
The pressure reducer has a chromed brass body and is installed directly onto the cylinder. It consists of devices that
reduce and maintain the pressure at 5.5 bars depending on the pressure inside the cylinder. When the cylinder pressure
reaches (70
5) bar, a special device increases the output pressure to 8 bars, thus turning the alarm signal of the mask
