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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
accessory kit for condensation boilers.
b
Arrange the flue gas discharge pipe so it slopes by 3° towards the
boiler.
b
The boiler automatically adapts the purging to the type of
installation and the length of the pipes. Do not obstruct or choke
the pipes in any way.
b
For the maximum length indications of the individual pipe see the
graphics (fig. 16).
b
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
20 R.S.I.
50+50 m
30 R.S.I.
42+42 m
Ø 80 twin pipes with Ø 50, Ø 60 and Ø80 pipework (fig. 17)
The characteristics of the boiler allow the Ø 80 flue gas discharge pipe
to be connected to the Ø 50 or Ø 60 Ø 80 or range of pipework.
b
For the pipework we recommend carrying out a design calculation
in order to comply with the applicable prevailing standards.
The allowed base configurations are indicated in the table.
Base pipe configuration table (*)
Air suction
1 90° ø 80 curve
4.5 m ø 80 pipe
Flue gas exhaust
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 or ø 80
For pipework pipe lengths see the table
(*) Use the plastic (PP) flue accessory systems for condensing boilers
that can be found on the residential catalogue price list, ø 50 and ø 80
H1 class; ø 60 P1 class.
The boilers come from the factory calibrated to:
- 20 R.S.I.: 4.500 r.p.m. (DHW) and 4.500 r.p.m. (CH), and maximum
length reachable is 3m for the ø 50 pipe, 12m for the ø 60 pipe and
80m for the ø 80 pipe.
- 25 C.S.I.: 4.900 r.p.m. (DHW) and 4.100 r.p.m. (CH), and maximum
length reachable is 1m for the ø 50 pipe, 10,6m for the ø 60 pipe and
58,5m for the ø 80 pipe.
- 30 C.S.I. - 30 R.S.I.: 5.800 r.p.m. (DHW) and 4.900 r.p.m. (CH), and
maximum length reachable is 2m for the ø 50 pipe, 13,7m for the ø
60 pipe and 75,5m 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.
b
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 20 R.S.I. adjustments table
Maximum
Ø 50
number of fan
pipework
rotations
pipes
(rpm)
DHW
CH
maximum length (m)
4.500
4.500
3
4.600
4.600
4
4.700
4.700
6
4.800
4.800
8
4.900
4.900
12 (*)
(*) Maximum installable lengths ONLY with exhaust pipes in H1 class.
Pressure loss
45° curve
90° curve
1 m
1.5 m
Ø 60
Ø 80
ΔP at the
pipework
pipework
boiler
pipes
pipes
output
12
80
15
90
20
108
24
131
34 (*)
187 (*)
Mynute Green E 25 C.S.I. adjustments table
Maximum
number of fan
rotations
(rpm)
DHW
CH
4.900
4.100
5.000
4.200
5.100
4.300
5.200
4.400
5.300
4.500
5.400
4.600
5.500
4.700
5.600
4.800
5.700
4.900
5.800
5.000
5.900
5.100
6.000
5.200
6.100
5.300
6.200
5.400
6.300
5.500
6.400
5.600
6.500
5.700
(*) Maximum installable lengths ONLY with exhaust pipes in H1 class.
Mynute Green E 30 C.S.I. - R.S.I. adjustments table
Maximum
number of fan
rotations
(rpm)
DHW
CH
5.800
4.900
5.900
5.000
6.000
5.100
6.100
5.200
6.200
5.300
6.300
5.400
6.400
5.500
6.500
5.600
(*) Maximum installable lengths ONLY with exhaust pipes in H1 class.
NOTE
If pipes different than those in the catalogue are used you must see
the ΔP values on the above tables to calculate the maximum length of
the pipes.
The Ø 50, Ø 60 and Ø 80 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.
b
In any case the maximum lengths declared in the booklet are
guaranteed and it is essential that they are not exceeded.
COMPONENT
45° curve
90° curve
0.5 m extension
1.0 m extension
2.0 m extension
3.9
Filling the heating system (fig. 18-19)
Pa
Once the hydraulic connections have been carried out, fill the heating
120
system. This operation must be carried out with a cold system, following
141
these instructions:
- open the lower automatic relief valve cap (A) by two or three turns to
170
allow continuous air venting and leave it open
199
- ensure that the cold water inlet tap is open
268
- open the filling tap (C) (external to the system for R.S.I. model) until
the pressure indicated on the water gauge is between 1 bar and 1.5
bar
- re-close the filling tap.
Mynute Green E C.S.I. - R.S.I.
Ø 50
Ø 60
Ø 80
pipework
pipework
pipework
pipes
pipes
pipes
maximum length (m)
1
10,6
58,5
4
16,3
89,6
6
21,9
120,7
8
27,6
151,8
10
31,4
172,5
14 (*)
229,5 (*)
17 (*)
270,9 (*)
20 (*)
315,4 (*)
23 (*)
353,8 (*)
26 (*)
390,0 (*)
28 (*)
426,3 (*)
32 (*)
467,7 (*)
35 (*)
519,5 (*)
38 (*)
560,9 (*)
41 (*)
600,3 (*)
44 (*)
638,6 (*)
49 (*)
700,8 (*)
Ø 50
Ø 60
Ø 80
pipework
pipework
pipework
pipes
pipes
pipes
maximum length (m)
2
13,7
75,5
4
19,0
104,5
5
21,4
117,5
8 (*)
159,5 (*)
11 (*)
190,0 (*)
13 (*)
216,7 (*)
15 (*)
252,6 (*)
19 (*)
300,7 (*)
Linear equivalent in metres Ø 80 (m)
Ø 50
12,3
19,6
6,1
13,5
29,5
ΔP at the
boiler
output
Pa
90
120
150
180
200
255
295
338
375
410
445
485
535
575
613
650
710
ΔP at the
boiler
output
Pa
145
183
200
255
295
330
377
440
Ø 60
5
8
2,5
5,5
12
7
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