31
6.12.3 Installation of separate ducts 80mm
The boiler can be installed with separate air inlet and exhaust
ducts. The figure below illustrate some examples of the fluing
options allowed and the associated losses of the accessories.
The total load loss is the sum of the load losses of the accesso-
ries used. The maximum load loss
must not exceed 15 mm H2O
,
and the maximum flue length
must not exceed 25 m
inlet and
exhaust.
9
C
C33
11
10
3
1
1
3
3
7
3
12
12
12
C13
3
2
3
1
14
12
13
12
NOTE
Before connecting accessories, it is
always advisable to lubricate the
internal part of the gaskets with
silicon products. Avoid using oils
and greases.
Load loss - mm H
2
O
Inlet
Exhaust
1 Air/smoke divider, code 8093050
0
0
Inlet
0
0
0.3
0.4
0.25
0.25
0.13
0.13
0.25
0.25
--
--
--
--
1.5
0.2
--
--
1.5
0.2
2 90° bend, code 8077450
0.25
3 a Extension 80mm L. 1000, code 8077351
3 b Extension 80mm L. 500, code 8077350
7 45° bend, code 8077451
0.20
9 Inlet/ exhaust fitting, code 8091401
--
--
10 Articulated tile, code 8091300
--
--
11 Vertical roof terminal, code 8091204 *
13 Inlet/ exhaust fitting, code 8091401
--
--
14 Coaxial Terminal, code 8091204 *
1.10
* This loss includes the losses with use of item 9 or 13
Murelle Pro HE 30
Load loss - mm H
2
O
Murelle Pro HE 35
0.20
0.10
0.30
0.20
0.10
0.20
0.15
0.15
1.10
Exhaust
Fig. 22
It is essential that flue gas analysis points are made available
directly above the boiler, these are incorporated in the twin flue
adaptor code 8093050.
1
2
3
4
Fig. 23
1
Twin pipe adaptor with test points 8093050
2
Air inlet
3
Exhaust
4
Test point
m
CAUTION
– The maximum overall length is determined by the
sum of the load losses of the individual flue compo-
nents
must not exceed 15 mm H2O
.
– The maximum flue length must not exceed 25m –
air intake, 25m –exhaust.
120
Ø 80
Ø 80
250
400
125
125
Fig. 24
