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MYNUTE X R
Table of standard pipe configuration (*)
1 Bend 90° Ø 80
Air suction
4.5m pipe Ø80
1 Bend 90° Ø 80
4.5m pipe Ø80
Flue gas discharge
Reduction from Ø80 to Ø50 from Ø80 to Ø60
Flue base bend 90°, Ø50 or Ø60 or Ø80
For ducting pipe lengths see table
(*) Use flue gas system accessories made of plastic (PP) for condensing boilers: Ø50 and
Ø80 class H1 and Ø60 class P1.
The boilers are factory set to:
- 20 R: 6,200 rpm in heating mode and in domestic hot water mode and the maximum
attainable length is 5m for the Ø50 pipe, 18m for the Ø60 pipe and 98m for the Ø80 pipe.
- 30 R: 6,900 rpm in heating mode and 7,800 in domestic hot water mode, and the maxi-
mum length that can be reached is 2m for the Ø50 pipe, 11m for the Ø60 pipe and 57m
for the Ø80 pipe.
- 40 R: 6,900 rpm in heating mode and 9,100 in domestic hot water mode, and the maxi-
mum length that can be reached is 7m for Ø60 pipe and 42m for Ø80 pipe (not applicable
for Ø50 pipe).
Should greater lengths be required, compensate the pressure drop with an increase in the
r.p.m.of the fan, as shown in the adjustments table, to provide the rated heat input.
b
The minimum calibration should not be modified.
Table of adjustments
Fan rotations
[rpm]
Heating
DHW
6,200
6,200
6,300
6,300
6,400
6,400
6,500
6,500
6,600
6,600
20 R
6,700
6,700
6,800
6,800
6,900
6,900
7,000
7,000
7,100
7,100
6,900
7,800
7,000
7,900
7,100
8,000
7,200
8,100
7,300
8,200
30 R
7,400
8,300
7,500
8,400
7,600
8,500
7,700
8,600
7,800
8,700
6,900
9,100
7,000
9,200
7,100
9,300
7,200
9,400
7,300
9,500
40 R
7,400
9,600
7,500
9,700
7,600
9,800
7,700
9,900
7,800
10,000
(*)
Maximum length that can be installed ONLY with class H1 discharge pipes.
N/A Not applicable
The Ø50 or Ø60 or Ø80 configurations contain Lab test data. In the event of installations that
differ from the indications in the "standard configurations" and "adjustments" tables, refer to
the equivalent linear lengths below.
b
In any case, the maximum lengths declared in the booklet are guaranteed, and it is
essential not to exceed them.
COMPONENT
Bend 45°
Bend 90°
Extension 0.5m
Extension 1.0m
Extension 2.0m
8
Pipework ducts
ΔP at boiler
Maximum length [m]
Ø 50
Ø 60
Ø 80
5
18
98
7 (*)
23 (*)
125 (*)
9 (*)
28 (*)
153 (*)
11 (*)
33 (*)
181 (*)
13 (*)
38 (*)
208 (*)
15 (*)
43 (*)
236 (*)
17 (*)
48 (*)
263 (*)
19 (*)
53 (*)
291 (*)
22 (*)
58 (*)
319 (*)
24 (*)
63 (*)
346 (*)
2
11
57
3 (*)
15 (*)
75 (*)
4 (*)
19 (*)
93 (*)
6 (*)
22 (*)
112 (*)
7 (*)
26 (*)
130 (*)
9 (*)
30 (*)
148 (*)
10 (*)
33 (*)
166 (*)
12 (*)
37 (*)
184 (*)
13 (*)
40 (*)
202 (*)
15 (*)
44 (*)
220 (*)
N/A
7
42
N/A (*)
10 (*)
60 (*)
1 (*)
13 (*)
78 (*)
3 (*)
16 (*)
96 (*)
4 (*)
19 (*)
114 (*)
5 (*)
23 (*)
138 (*)
7 (*)
26 (*)
156 (*)
8 (*)
29 (*)
174 (*)
9 (*)
32 (*)
192 (*)
10 (*)
35 (*)
210 (*)
Linear equivalent in metres Ø80 (m)
Ø 50
Ø 60
12.3
5
19.6
8
6.1
2.5
13.5
5.5
29.5
12
3.14
Installation on collective flues in positive pressure
The collective flue is a flue gas exhaust system suitable for collecting and expelling the
combustion products of several appliances installed on several floors of a building. The
positive pressure collective flues can only be used for type C condensing appliances.
Therefore the B53P/B23P configuration is forbidden. The installation of boilers under
collective pressure flues is allowed exclusively in G20. The boiler is sized to operate
correctly up to a maximum internal pressure of the flue no higher than the value of 25 Pa.
Check that the fan speed corresponds to what is shown in the table "technical data".
Make sure that the air intake and exhaust pipes of the combustion products are watertight.
WARNINGS:
b
The appliances connected to a collective pipe must all be of the same type and have
equivalent combustion characteristics.
b
The number of devices connected to a positive pressure collective pipe is defined by
the flue designer.
The boiler is designed to be connected to a collective flue sized to operate in conditions
where the static pressure of the collective flue pipe can exceed the static pressure of the
collective air duct of 25 Pa in the condition in which n-1 boilers work at maximum rated heat
input and 1 boiler at the minimum rated heat input allowed by the controls.
b
The minimum permissible pressure difference between the flue gas outlet and the
combustion air inlet is -200 Pa (including - 100 Pa of wind pressure).
For both types of exhaust, further accessories are available (curves, extensions, terminals,
etc.) which make possible the flue gas exhaust configurations foreseen in the boiler booklet.
b
outlet
The pipes must be installed in such a way as to avoid condensation sticking which
Pa
would prevent the correct evacuation of the combustion products.
b
174
A data plate must be present at the connection point with the collective flue pipe. The
213
plate must include at least the following information:
- the collective flue is sized for boilers C(10) type
253
- the maximum permissible mass flow of the combustion products in kg/h
292
- the dimensions of the connection to the common pipes
332
- a warning concerning the openings for the air outlet and the entry of the combu-
371
stion products of the collective pressure pipe; these openings must be closed and
410
their tightness must be checked when the boiler is disconnected
450
- the name of the manufacturer of the collective smoke pipe or its identification
symbol.
489
b
See applicable legislation for the discharge of the combustion products as well as
528
local regulations.
190
b
229
The flue gas pipe must be suitably selected based on the parameters shown below.
269
308
maximum length
348
ø 60-100
387
ø 80
426
ø 80/125
466
b
505
The terminal of the collective pipe must generate an upward air current.
b
544
Before attempting any operation, disconnect the appliance from the electrical supply.
196
b
235
Before assembling, lubricate the gaskets with a non-corrosive glide lubricant.
b
275
The flue gases discharge pipe should be inclined, if the pipe is horizontal, by 3°
314
towards the boiler.
b
354
The number and characteristics of the exhaust ventilation devices which are the real
393
characteristics of the flue itself.
b
432
The condensation can flow inside the boiler.
472
b
511
The maximum recirculated value allowed in wind conditions is 10%.
b
550
The maximum permissible pressure difference (25 Pa) between the combustion
products inlet and the air outlet of a collective flue can not be exceeded when-
1 boiler work at the maximum nominal heat output and 1 boiler within minimum
temperature allowed by the checks.
b
The collective smoke pipe must be adequate for an overpressure of at least 200 Pa.
b
The collective flue must not be equipped with a wind-proofing device.
At this point it is possible to install the curves and extensions, available as accessories,
depending on the type of installation desired.
The maximum permissible lengths of the flue pipe and the air intake pipe are given in the
instruction manual of the reference device (fig 18a-18b).
With C(10) installation, in any case, report the number of fan speed (rpm) on the
label placed next to the data plate.
Installation currently not available on model 40kW.
minimum length
4,5
0,5
4,5
0,5
4,5
0,5
UM
m
m
m
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