20
3.8 - CONNECTION
Danger!
The gas connection must be carried out only by
a qualified installer who must respect and apply
that foreseen by relevant laws in force in the local
prescriptions of the supply company. Incorrect in-
stallation can cause damage to persons, animals
and objects for which the manufacturer cannot be
held responsible.
If you smell gas:
a) do not operate electric switches, the telephone
or any other object that may cause sparks;
b) Immediately open doors and
windows to create air current
to purify the room;
c) Shut the gas cocks.
d) Ask for the intervention of professionally
qualified personnel.
The mains pressure must be within 0.5 and 6 bar
(in the event of greater pressure install a pressure
reducer).
Attention!
Do not mix the heating water with incorrect
concentrations of antifreeze or anti-corrosion
substances! This could damage the gaskets
and cause noise during operation.
Unical will not be held liable for damage to
persons, animals or objects due to failure to
comply with the above instruction.
XC-K 3
CONNECTIONS
G
Gas Inlet
[Inch]
M (T1)
Flow
[dN]
R (at / bt)
(T2 - 3)
return
[dN]
T4
Expansion vassel
[dN]
T5
drain Boiler
[Inch]
T7
Flue gas exhaust
[Ø mm]
T8
Condensation drain
[Ø mm]
1000
X
dN 125
dN 125
dN 65
G 1’’
350
dN 40
1250
X
dN 150
dN 150
dN 80
G 1’’
400
dN 40
1500
X
dN 150
dN 150
dN 80
G 1’’
400
dN 40
1750
X
dN 200
dN 200
dN 100
G 1’’
450
dN 40
2000
X
dN 200
dN 200
dN 100
G 1’’
450
dN 40
2500
X
dN 250
dN 250
dN 125
G 1’’
550
dN 40
3000
X
dN 250
dN 250
dN 125
G 1’’
550
dN 40
11
4 1
1 2
1 3
3 1
3 2
4 2
Selez.
Servizi di Riscaldamento
Seleziona la Funzione
Esci
T4
M
T1
Rat
T3
Rbt
T2
T7
T5
T8
G
3.7 -
FLUE GAS EXHAUST PIPE
CONNECTION
To connect the flue gas exhaust pipe, local and national stand
-
ards must be observed.
It is recommended to insulate the pipe connecting to the chimney
to reduce heat loss and noise.
along the section connecting the boiler to the
flue there must be suitable points for measuring
flue gas temperature and analysing combustion
products.
Use only exhaust pipes suitable for the type of fuel used.
The supplier will have no contractual or extra-contractual
liability for damage caused due to incorrect installation and
use and anyway failure to comply with the instructions pro-
vided by the manufacturer.
when performing replacement installations, alwaYs
replace the flue gas exhaust accessory as well.
The flue must comply with standards in force.
Warning!
If it is not necessary to have the 2 returns
in the system, ever use the low temperature
return Rbt (T2).