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Remeha Gas 3002 ECO Manual

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5.6 Flue gas discharge and air supply
5.6.1 General
The Remeha Gas 3002 ECO is available in either a con-
ventional room ventilated or a room sealed (Type B13,
C33, C53 or C63) construction. Specify at the time of
ordering if the boiler is required to be supplied for room
sealed operation. In that case, the boiler will be supplied
with an air supply connection and a clamping band.
This connection must be fixed to the fan inlet (remove the
cover plate on the rear top casing).
- Conventional room ventilated operation:
The open boilers use ambient air as combustion air.
See para. 5.6.3 for a flue gas discharge table of the
Remeha Gas 3002 ECO in room ventilated construction.
- Room sealed operation:
A sealed system is obtained by using an air supply pipe.
Because of this, the number of potential boiler locations
within the building is increased and less stringent
requirements are imposed on the discharge location,
since the air supply and the flue gas discharge are in
the same pressure area.
Besides, open air is generally cleaner, and this has a
positive influence on the effective life of the unit.
See para. 5.6.4 for a flue gas discharge/air supply table
of the remeha Gas 3002 ECO in room sealed construc-
tion.
5.6.2 Requirements
The horizontal components in the flue gas discharge sys-
tem should slope towards the boiler.
- Material:
a. Flues: Single-walled aluminium or stainless steel
(316)
Flexible stainless steel (316) or plastic.
b. Air supply: Single-walled aluminium or stainless steel
or flexible aluminium or flexible stainless
steel or plastic. Discharge condensate out
of the flue seperately
- Construction:
The flue must be airtight and watertight at the seams
and joints.
Construction of the flue
1 = flue without bends
2 = flue with 2 off 45° bends
3 = flue with 2 off 90° bends
4 = flue with a 90° bend, or a flue with 2 off 45°
bends, with a T-inlet.
5.6.3 Conventional room ventilated
Fig. 07 Conventional room ventilated
The table indicates the maxi mum distance to be bridged
to the outlet, depen ding on section size, version and
diameter of the flue gas discharge pipe.
Maximum allowable lengths of flue gas discharge
piping in (L) m
D
(in mm)
234
Outlet with Terminal
Outlet without Terminal
'free outlet'
9 sect.
Ø 130
Ø 150
Ø 180
Ø 200
11 sect.
Ø 150
Ø 180
Ø 200
Ø 250
13 sect.
Ø 150
Ø 180
Ø 200
Ø 250
15 sect.
Ø 150
Ø 180
Ø 200
Ø 250
17 sect.
Ø 180
Ø 200
Ø 250
Ø 300
19 sect.
Ø 180
Ø 200
Ø 250
Ø 300
9
21
+
+
8
20
+
+
3
14
+
+
7
19
+
+
11
34
+
+
5
27
+
+
10
32
+
+
4
16
29
+
3
14
27
+
2
13
26
+
9
19
+
+
3
12
+
+
8
18
+
+
4
16
+
+
7
29
+
+
-
9
22
+
4
14
+
+
3
12
+
+
1
10
+
+
-
5
+
+
5
27
+
+
4
25
+
+
3
14
+
+
2
13
+
+
-
9
+
+
19
+
+
+
17
40
+
+
16
38
+
+
14
35
+
+
+ Length upto 40 m applicable.
For longer lenghts contact our technical departement
- Not applicable
11
7 sect.
Ø 130
Ø 150
Ø 180
Ø 200
432
8
16
+
+
6
14
+
+
5
12
+
+
1
8
+
+
13
34
+
+
12
34
+
+
11
32
+
+
8
28
+
+
12
35
+
+
-
20
+
+
7
23
+
+
-
8
25
+
0
15
33
+
0
15
32
+
-
13
31
+
-
1
13
+
-
8
20
+
-
7
20
+
-
6
18
+
11
21
+
+
-
7
+
+
-
6
+
+
-
5
+
+
D
mm
Ø 130
Ø 150
Ø 180
Ø 200
Ø 250
Ø 300
Note:
For every extra bend of 90° resp. 45°, deduct lengths
according to the following table:
6
21
40
+
5
20
38
+
2
16
34
+
-
-
36
+
length
m
90° bend
1.8
2.1
2.5
3
3.5
4
45° bend
1
1.2
1.4
1.6
2
2.4
… 13 …


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