DOMIcondens HE 26 C
6
EN
cod. 3540Z852 - Rev. 01 - 08/2012
3.5 Electrical connections
Important
B
The unit must be connected to an efficient earthing system in conformity with
current safety regulations. Have the efficiency and suitability of the earthing
system checked by professionally qualified personnel; the Manufacturer de-
clines any liability for damage caused by failure to earth the system.
The boiler is prewired and provided with a "Y" type cable (without plug) for con-
nection to the electric line. The connections to the power supply must be per-
manent and equipped with a double-pole switch with contact opening distance
of at least 3 mm, installing fuses of max. 3A between the boiler and the line.
Make sure to respect the polarities (LINE: brown wire / NEUTRAL: blue wire /
EARTH: yellow/green wire) in connections to the electric line.
B
The unit's power cable must not be replaced by the user; if damaged, switch
the unit off and have the cable replaced by professionally qualified personnel.
If replacing the power cable, only use
"HAR H05 VV-F"
3x0.75 mm2 cable with
max. ext. diameter of 8 mm.
Room thermostat (optional)
B
IMPORTANT: THE ROOM THERMOSTAT MUST HAVE VOLTAGE-FREE
CONTACTS. CONNECTING 230 V TO THE ROOM THERMOSTAT TERMI-
NALS WILL PERMANENTLY DAMAGE THE ELECTRONIC BOARD.
When connecting time controls or a timer, do not take the power supply for these devices
from their breaking contacts Their power supply must be by means of direct connection
from the mains or with batteries, depending on the kind of device.
Accessing the electrical terminal block
Follow the instructions given in fig. 10 to access the electrical connections terminal block. The lay-
out of the terminals for the various connections is also given in the wiring diagram in fig. 26.
fig. 10 - Accessing the terminal block
3.6 Fume ducts
Important
The unit is “type C” with sealed chamber and forced draught; the air inlet and fume outlet
must be connected to one of the following extraction/suction systems. Before installation,
check and carefully observe the above prescriptions. Also, comply with the provisions
concerning the positioning of wall and/or roof terminals and the minimum distances from
windows, walls, vents, etc.
Expansion
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 any deformation, leave an expansion space of approx. 2 ÷ 4 mm for
every metre of pipe.
Baffles
Boiler operation requires fitting the baffles supplied with the unit, according to that given
in the following tables.
Before inserting the fume exhaust pipe, check the presence of the right baffle (when it is to be
used) and that it is correctly positioned. The boilers are fitted standard with the smallest diameter
baffle. To replace the baffle (ref. 1 - fig. 11), proceed as indicated in fig. 11.
fig. 11
Connection with coaxial pipes
Standard coaxial installation
fig. 12 - Standard coaxial installation
Other coaxial connections
fig. 13 - Examples of connection with coaxial pipes (
= Air /
= Fumes)
Table. 2 - Typology
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 outside, to prevent condensate from
flowing back towards the unit.
fig. 14 - Starting accessory for coaxial ducts
Table. 3 - Baffles for coaxial ducts
139
72
5
6
138
3
4
3 4
5 6
1
Type
Description
C1X
Wall horizontal exhaust and inlet
C3X
Roof vertical exhaust and inlet
Coaxial 60/100
Coaxial 80/125
Max. permissible length
6 m
12 m
Reduction factor 90° bend
1 m
0.5 m
Reduction factor 45° bend
0.5 m
0.25 m
Baffle to use
0 ÷ 2 m
Ø 45
0 ÷ 6 m
Ø 45
2 ÷ 4 m
Ø 50
6 ÷ 12 m
no baffle
4 ÷ 6 m
no baffle
125
200
200
80
400
700
Ø100
125
196
80
330
700
Ø100
Drill the wall 10÷20 mm
more than the
pipe diameter
Rear outlet
Side view
Side outlet
Front view
Between
10 e 60 mm
Between
10 e 60 mm
041025G0
C
1X
C
1X
C
3X
C
3X
C
3X
C
1X
041001X0
041002X0
041006X0
Ø 102
Ø 61.5
Ø 127
Ø 80.5
120
120
90.5
68.5
Ø 100.5
Ø 61.6
Summary of Contents for DOMIcondens HE 26 C
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