25
Installation info
JP2
OT
RT
OT
RT
LPG
JP1
NAT
LPG
NAT
A
B
2.4 - FILLING THE
SYSTEM
EAfter completing all the connections of the
system the heating circuit can be filled.
This filling operation must be performed with
care as follows:
-
open the air vents of the radiators and che-
ck that the automatic air vent in the boiler
is works properly;
-
gradually open the water tap and check
operation of any automatic air vents instal-
led in the system;
-
close the air vents on the radiators as soon
as water comes out;
-
use the pressure gauge on the boiler to
check that the pressure has reached the
value of 0.8/1bar;
-
close the water inlet tap and then release
the air again through the radiator air vents;
-
after switching on the boiler and after the
system has reached the correct tempera-
ture, stop the pump and repeat the air re-
lief operations;
-
let the system cool down and then adjust
the water pressure to 0.8/1 bar.
WARNING
The minimum water pressure
switch does not give electrical
fig. 27
2.3.2 - JUMPER LOCATION
They are placed on the modulation card and
their purpose is to settle basic operational fun-
ctions.
In order to get access to the jumper:
-
WARNING! switch off electrical supply.
-
Remove the casing.
-
Remove the four screws
(A)
and the cover
(B)
in order to get access to the connec-
tions area.
JP1:
For nat. gas boilers, the jumper is on
NAT.
For LPG boilers, the jumper is on
LPG
.
JP2:
SETTLEMET OF THE CHRONOTHER-
MOSTAT TYPE
For modulating chronothermostat the jumper
is on
OT
For
ON / OFF
thermostat
(delivery condition)
the jumper is in
RT.
FILLING TAP
impulse to the burner to ignite when the pres-
sure is lower than 0.4 bar. The pressure of the
water in the C.H. system must not be lower
than 0.8/1bar; if this value is lower use the
water filling tap on the boiler to adjust the pres-
sure.
This must be performed when the system is
cold. Use the temperature and pressure gau-
ge on the boiler to read the pressure value of
the circuit.
NB: After a given period of inactivity and
without electrical supply the pump could be
blocked.
Before switching on the boiler it is important
to restart the pump as follows: loosen the pro-
tection screw in the centre of the pump motor,
insert a screwdriver in the hole and then ma-
nually rotate the pump shaft clockwise.
Once the pump has been restarted tighten the
protection screw and check that there are no
water leaks.
WARNING
Once the protection screw has been removed
a little water may leak out. Before replacing
the casing of the boiler dry any wet surfaces.
2.5 - STARTING THE BOILER
PRELIMINARY CHECKS
Before starting the boiler check that:
-
the boiler installation has been made in
accordance with all the applicable regula-
tions concerning water and gas installation,
smoke evacuation and electrical installa-
tion
-
the flue gas exhaust duct and its terminal
are installed correctly:
when the boiler is
switched on there must be no leakage
of any combustion products from any
seals;
-
the supply voltage of the boiler is 230 V-
50 Hz;
-
the system is correctly filled with water
(pressure at the gauge 0.8/1 bar);
-
any gate valves taps of the system are
open;
-
the mains gas corresponds to that with
which the boiler has been calibrated: othe-
rwise, convert the boiler to use the gas
available (see section: “MODIFICATION
FOR OTHER GASES “):
this operation
must be performed by qualified techni-
cians;
-
the gas supply tap is open;
-
there are no gas leaks;
-
the external mains switch is on;
-
the boiler’s safety valve is not locked;
-
there are no water leaks.
SWITCHING ON AND OFF
To switch on and off the boiler follow the indi-
cations in the “
Users’ Instructions
”.
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