ECONCEPT ST
39
EN
cod. 3540S814 -
/201
(Rev. 00)
Accessing the electrical terminal block
Follow the instructions given in fig. 18 to access the electrical connections terminal block.
The layout of the terminals for the various connections is also given in the wiring diagram
in fig. 34.
fig. 18 - Accessing the terminal block
3.6 Fume ducts
Important
The unit is a "C type" with sealed chamber and forced draught, the air inlet and fume out-
let must be connected to one of the following exhaust/inlet systems. The unit is approved
for operation with all the Cxy flue configurations indicated on the data plate (some con-
figurations are given by way of example in this section). Some configurations may be ex-
pressly limited or not permitted by law, standards or local regulations. Before proceeding
with installation, check and carefully observe the above prescriptions. Also, comply with
the provisions on the positioning of wall and/or roof terminals and the minimum distances
from windows, walls, vents, etc.
B
This C-type unit must be installed using the inlet and fume exhaust ducts supplied by the
manufacturer in accordance with UNI-CIG 7129/92. Failure to use them automatically
invalidates every warranty and relieves the manufacturer of any liability.
A
For fume exhaust pipes longer than 1 metre, during installation take in account
the natural expansion of the materials when the boiler is operating.
To prevent deformations, leave an expansion space of approx. 2 ÷ 4 mm for
every metre of pipe.
Connection with coaxial pipes
fig. 19 - Examples of connection with coaxial pipes (
= Air /
= Fumes)
For coaxial connection, fit the unit with one of the following starting accessories. For the
wall hole dimensions, refer to the figure on the cover. Any horizontal sections of the fume
exhaust must be kept sloping slightly towards the boiler, to prevent condensate from
flowing back towards the outside and causing dripping.
fig. 20 - Starting accessory for coaxial ducts
Before proceeding with installation, check with table 2 that the maximum permissible
length is not exceeded, bearing in mind that every coaxial bend gives rise to the reduc-
tion indicated in the table. For example, a Ø 60/100 duct comprising a 90° bend + 1 hor-
izontal metre has a total equivalent length of 2 metres.
Table. 2 - Max. length coaxial ducts
Connection with separate pipes
fig. 21 - Examples of connection with separate pipes (
= Air /
= Fumes)
For the connection of separate ducts, fit the unit with the following starting accessory:
fig. 22 - Starting accessory for separate ducts
Before proceeding with installation make sure the maximum permissible length has not
been exceeded, by means of a simple calculation:
1.
Completely establish the layout of the system of split flues, including accessories
and outlet terminals.
2.
Consult the table 4 and identify the losses in m
eq
(equivalent metres) of every com-
ponent, according to the installation position.
3.
Check that the sum total of losses is less than or equal to the maximum permissible
length in table 3.
Table. 3 - Max. length separate ducts
Table. 4 - Accessories
Connection to multiple flues
fig. 23 - Examples of connection to flues (
= Air /
= Fumes)
To connect the
ECONCEPT ST
boiler to a multiple flue or a single chimney with natural
draught, the flue or chimney must be expressly designed by professionally qualified tech-
nical personnel in conformity with the current regulations and be suitable for sealed
chamber units equipped with a fan.
In particular, chimneys and flues must have the following characteristics:
•
Be sized according to the method of calculation given in the current regulations.
•
Be fumetight, resistant to the fumes and heat and impermeable to condensate.
•
Have a round or quadrangular section, with vertical progression and no constrictions.
•
Have ducts that convey the hot fumes at a suitable distance or isolated from com-
bustible materials.
•
Be connected to only one unit per floor.
•
Be connected to a single type of unit (all or only forced draught units or all and only
natural draught units).
•
Have no mechanical suction devices in the main ducts.
•
Be at a lower pressure, along the entire length, in conditions of stationary operation.
•
Have at their base a collection chamber for solid materials or condensate, provided
with an airtight metal door.
Coaxial 60/100
Coaxial 80/125
Max. permissible length
5 m
15 m
Reduction factor 90° bend
1 m
0.5 m
Reduction factor 45° bend
0.5 m
0.25 m
C
13
C
13
C
33
C
33
C
33
C
13
Ø 100
Ø 60
120
142
Ø 80
Ø 127
120
147
Ø 100
Ø 60
041002X0
041006X0
041001X0
Separate ducts
Separate ducts
ECONCEPT ST 25
ECONCEPT ST 35
Max. permissible length
75 m
eq
55 m
eq
Losses in m
eq
Inlet
air
Fume exhaust
Vertical
Horizontal
Ø 80
PIPE
1 m M/F
1KWMA83W
1.0
1.6
2.0
BEND
45° M/F
1KWMA65W
1.2
1.8
90° M/F
1KWMA01W
1.5
2.0
PIPE SECTION
with test point
1KWMA70W
0.3
0.3
TERMINAL
air, wall
1KWMA85A
2.0
-
fumes, wall with antiwind
1KWMA86A
-
5.0
FLUE
Split air/fumes 80/80
1KWMA84U
-
12.0
C
53
C
33
C
53
B
23
C
13
041003X0
C
83
C
43
C
43
