Beretta Mynute Green E 30 R.S.I. Manual Para El Instalador Y El Usuario página 7

Twin pipes (Ø 80 mm) (Fig. 15)
The twin pipes can face in the direction most suitable for installation
requirements.
For installation, follow the instructions supplied with the specific ac-
cessory kit for condensation boilers.
Arrange the flue gas discharge pipe so it slopes by 3° towards
the boiler.
The boiler automatically adapts the purging to the type of in-
stallation and the length of the pipes. Do not obstruct or choke
the pipes in any way.
For the maximum length indications of the individual pipe see
the graphics (fig. 16).
The use of longer pipes reduces the boiler output.
Maximum straight length
of twin pipe Ø 80 mm
30 R.S.I. 42+42 m
Ø 80 twin pipes with Ø 50, Ø 60 and Ø 80 pipework (Fig. 17)
The characteristics of the boiler allow the Ø 80 flue gas discharge
pipe to be connected to the Ø 50, 60 and 80 range of pipework.
For the pipework we recommend carrying out a design calcula-
tion in order to comply with the applicable prevailing standards.
The allowed base configurations are indicated in the table.
Base pipe configuration table (*)
Air suction
Flue gas exhaust
(*) Use the plastic (PP) flue accessory systems for condensing boil-
ers that can be found on the residential catalogue price list, ø 50 ø 80
H1 class and ø 60 P1 class.
The boilers come from the factory calibrated to 5.600 r.p.m. (DHW)
and 4,700 r.p.m. (CH) and maximum length reachable is 14 m for the
ø 60 pipe and 2 m for the ø 50 and 75 for the ø 80 pipe
If you need to reach greater lengths compensate for the pressure
drop with an increase of the number of fan rotations as shown in the
adjustments table in order to guarantee the rated heat input.
The minimum calibration must not be modified.
If the prevailing value is greater than 200 Pa the law requires the use
of H1 pressure class flue accessories
Fan rotations
Ø 50 pipework
maximum number
of fan rotations
pipes
(rpm)
Maximum
length
DHW CH
m
5600 4700 2
5700 4800 4
5800 4900 5 (*)
5900 5000 8
6000 5100 11
6100 5200 13
6200 5300 15
6300 5400 19
(*) Compatible length with P1 class pipes
NOTE
If pipes different than those in the Beretta catalogue are used you must
see the ΔP values on the above tables to calculate the maximum length
of the pipes.
The Ø 60 and Ø 50 configurations have experimental, laboratory checked
data.
Pressure loss
45° curve 90° curve
1 m
1 90° ø 80 curve
4.5 m ø 80 pipe
1 90° ø 80 curve
4.5 m ø 80 pipe
Reduction from ø 80 to ø 50 or ø 80 to ø 60
flue base curve 90° ø 50, ø 60 and ø 80
for pipework pipe lengths see the table
Ø 60 pipework Ø 80 pipework
pipes pipes
Maximum Maximum
length length
m m
14 75
19 104
21 (*) 117 (*)
159
190
217
253
301
In the event of installations other than those indicated in the "base
configurations" and "adjustments" table, see the equivalent Ø 80 - Ø
60 or Ø 50 linear lengths shown below.
In any case the maximum lengths declared in the booklet are
guaranteed and it is essential that they are not exceeded.
Ø 60 component
45° Ø 60 curve
90° Ø 60 curve
0.5 m Ø 60 extension
1.0 m Ø 60 extension
2.0 m Ø 60 extension
Ø 50 COMPONENT
45° Ø 50 curve
1.5 m
90° Ø 50 curve
0.5 m Ø 50 extension
1.0 m Ø 50 extension
2.0 m Ø 560 extension
3.11 Installation on collective flues in positive pressure
The collective flue is a gas discharge system suitable for collecting
and expelling the combustion products of several appliances in-
stalled on several floors of a building (fig. 18).
The collective flues in positive pressure can be used only for type C
condensing appliances. Consequently the B53P/B23P configuration
is not permitted.
Installation of the boiler on collective flues in pressure is permitted
only at G20 using a specific check valve, supplied as an accessory.
See the related instructions for the assembly procedure.
The boiler is sized to operate correctly up to a maximum internal
pressure of the smoke pipe no higher than the value shown in the
multigas table.
Complete the check valve assembly operations and proceed with
adjustment of the number of fan rotations as shown in the multigas
table.
Ensure that the air suction pipes and combustion product outlet are
airtight.
Installation of the check valve (fig. 19) requires the application of the
ATTENTION label that comes with the same accessory on a visible
part of the boiler shell. Applying the label is essential for safety during
maintenance or replacement of the boiler and/or the collective flue.
WARNINGS
The manufacturer will not be liable in the event of failure to
apply the check valve and the related label prior to placing the
boiler in service.
The appliances connected to a collected flue must all be of the
same type and have equivalent combustion characteristics.
ΔP at the
boiler
The number of appliances that can be connected to a collective
output
flue in positive pressure is defined by the smoke pipe designer.
with max
length (°)
MAINTENANCE FOR APPLICATION IN A COLLECTIVE FLUE
Pa
UNDER PRESSURE
145
During scheduled maintenance on the appliance you must also
183
check the condition of the check valve in order to guarantee correct
200
operation and safety of the system.
255
Before proceeding with maintenance you must conduct an analysis
295
of the combustion product and check the boiler operating status.
330
In the event of maintenance on the boiler's combustion circuit
377
(gas discharge pipes, condensate syphon, burner, electrode
440
conveyors) you must close the gas discharge pipe that comes
from the smoke pipe under pressure and check the seal.
Subsequently:
- Remove electrical power by setting the system's main switch to
"off"
- Close the gas interception taps
- Remove the shell
- Unhook the instrument panel and rotate it downward
- Unhook and remove the air box cover
Mynute Green E R.S.I.
Linear equivalent in
metres Ø 80 (m)
5
8
2.5
5.5
12
Linear equivalent in
metres Ø 80 (m)
12,3
19,6
6,1
13,5
29,5
7