Beretta Mynute Green E 25 C.S.I. Installer And User Manual page 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
25 C.S.I. 53+53 m
30 C.S.I. 42+42 m
Ø 80 twin pipes with Ø 50 and 60 pipework (Fig. 17)
The characteristics of the boiler allow the Ø 80 flue gas discharge
pipe to be connected to the Ø 50 or 60 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 H1
class and ø 60 P1 class
The boilers come from the factory calibrated to:
- 25 C.S.I.: 4,700 r.p.m. and maximum length reachable is 11 m for
the ø 60 pipe and 1 m for the ø 50 pipe
- 30 C.S.I.: 5,600 r.p.m. and maximum length reachable is 14 m for
the ø 60 pipe and 2 m for the ø 50 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
Mynute Green E 25 C.S.I. adjustments table
Maximum number
Ø 50 pipework pipes
of fan rotations
(rpm)
maximum length
DHW CH
m
4700 3900 1
4800 4000 4
4900 4100 6
5000 4200 8
5100 4300 10
5200 4400 14
5300 4500 17
5400 4600 20
5500 4700 23
5600 4800 26
5700 4900 28
5800 5000 32
5900 5100 35
6000 5200 38
6100 5300 41
6200 5400 44
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 or ø 60
for pipework pipe lengths see the table
ΔP at the boiler
Ø 60 pipework pipes
output with
maximum length
max length (°)
m
11
16
22
28
31 (*)
-
-
-
-
-
-
-
-
-
-
Maximum number
of fan rotations
(rpm)
DHW CH
6300 5500
Mynute Green E 30 C.S.I. adjustments table
Fan rotations
maximum number
of fan rotations
(rpm)
DHW CH
5600 4700
5700 4800
5800 4900
5900 5000
6000 5100
1.5 m
6100 5200
6200 5300
6300 5400
(*) 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.
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
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).
PA
The collective flues in positive pressure can be used only for type C
90
condensing appliances. Consequently the B53P/B23P configuration
120 is not permitted.
Installation of the boiler on collective flues in pressure is permitted
150
only at G20 using a specific check valve, supplied as an accessory.
180
See the related instructions for the assembly procedure.
200
The boiler is sized to operate correctly up to a maximum internal
255
pressure of the smoke pipe no higher than the value shown in the
295
multigas table.
338
Complete the check valve assembly operations and proceed with
375
adjustment of the number of fan rotations as shown in the multigas
410
table.
445
Ensure that the air suction pipes and combustion product outlet are
485
airtight.
535 Installation of the check valve (fig. 19) requires the application of the
ATTENTION label that comes with the same accessory on a visible
575
part of the boiler shell. Applying the label is essential for safety during
613
maintenance or replacement of the boiler and/or the collective flue.
650
Ø 50 pipework pipes Ø 60 pipework pipes
maximum length maximum length
m m
49
Ø 50 pipework
Ø 60 pipework pipes
pipes
Maximum length
Maximum length
m m
14
2
4 19
5 21 (*)
8 -
11 -
13 -
15
19
Linear equivalent in
metres Ø 80 (m)
Linear equivalent in
metres Ø 80 (m)
Mynute Green E C.S.I.
ΔP at the boiler
output with
max length (°)
PA
710
ΔP at the
boiler output
with max
length (°)
Pa
145
183
200
255
295
330
377
440
5
8
2.5
5.5
12
12,3
19,6
6,1
13,5
29,5
7