33
m
CAUTION
The total maximum length is obtained by adding the
length of the inlet and outlet pipes. The total load loss
is determined by the sum of the load losses of the sin-
gle accessories that make up the pipework. It should
not exceed 15 mmH
2
O. The total extension for each
single duct must not in any case exceed 25 m, even
if the total load loss is less than the maximum which
can be applied.
NOTE:
for the boiler to operate correctly it is necessary that a
minimum distance of 0.50 m of the duct is respected with a 90°
inlet curve.
Example: calculation of the load loss of a
MURELLE HT 25
boiler.
Accessories Ø 80
mm
Code
Quan-
tity
Load loss (mm H
2
O)
Inlet
Outlet
Total
Extension W. 1000
mm (horizontal)
8077351
9
9 x 0,15
-
1,35
Extension W. 1000
mm (horizontal)
8077351
9
-
9 x 0,15
1,35
90° curve
8077450
2
2 x 0,20
-
0,40
90° curve
8077450
2
-
2 x 0,25
0,50
Wall terminal
8089501
1
0,10
-
0,10
Wall terminal
8089501
1
-
0,25
0,25
TOTAL
3.95
Installation is permitted as the total load losses (3,95 mmH
2
O)
of the required accessories is less than 15,0 mmH
2
O and the
total extension for each single duct is still less than 25 m.
6.14 Electrical connections
The boiler is equipped with a ready wired power cable which is
to be connected to a 230V~50 Hz network.
If this cable needs to be replaced, an original spare must be re-
quested from
Sime
.
Therefore only the connections of the original components as
shown in the table are needed. These are to be ordered sepa-
rately from the boiler.
DESCRIPTION
CODE
External sensor kit (ß=3435, NTC 10KOhm at
25°C)
8094101
Power cable (dedicated)
6329414
Remote control HOME (open therm)
8092280
Remote control HOME PLUS (open therm)
8092281
m
CAUTION
The maintenance interventions described must ONLY
be carried out the professionally qualified personnel.
a
WARNING
Before carrying out any interventions described:
– set the main system switch to "OFF"
– close the gas valve
– make sure that no hot parts inside the appliance are
touched.
OFF
Fig. 47
To facilitate introduction of the connection wires of the optional
components into the boiler:
– remove the screws (1), pull the front panel (2) forwards and
release it from the top by lifting it
1
2
Fig. 48
