Sime 30 BFT, Installer'S Instructions, Page: 18 / 34

110
IT
ES
PT
GB
CR1 CR
TA
TA
Connettore J2
L
N
TA TA
1
VZ
R VZ
1
R
1
NOTA: I relé vengono impiegati solo
nel caso le valvole di zona siano
prive di micro.
Fig. 22
KEY
TA-TA1
Zone room stat
VZ-VZ1 Zone gas valve
R-R1 Zone relay
CR-CR1 Zone microvalve or relay contact
NOTE: Relays are used only if the area valves
have no microswitches.
Connector “TA”
This may occur upon first ignition or
after long periods of boiler lay-off when
there is air in the pipes. It may be caused
by the gas cock being closed or by one of
the valve coils having a break in the win-
ding, so that the valve cannot open.
– Ignition electrode fails to spark
In the boiler, only the gas to the burner
is seen to open. After 10 sec. the war-
ning light indicating equipment “lock-
out” lights up.
This may be due to a break in the wire of
the electrode or to the wire not properly
fastened to the electric terminal of the
control box;
– No detection of flame
The continuous spark discharge of the
electrode is noted starting from ignition
even though the burner is lit.
A f t e r 10 s e c o n d s h a v e e l a p s e d , t h e
sparks cease, the burner goes out, and
the warning light indicating equipment
“lock-out” lights up.
There could have a break in the wire of
the sensing electrode or the electrode
itself is touching earth: the electrode is
worn out and needs replacing. The con-
trol box is defective.
When there is a sudden voltage failure, the
burner shuts out immediately; when power
supply returns, the boiler will start up again
automatically.
3.4 FLOW SWITCH SAFETY VALVE
A flow switch safety valve intervenes,
blocking the operation of the burner if the
boiler is without water due to the formation
of an air lock in the heat exchanger or if the
circulator is not working, or because the
“Aqua Guard” filter is obstructed with impu-
rities.
NOTE: If replacing the flow switch valve,
make sure that the arrow stamped on the
valve points in the same direction as the
flow of water.
3.5 SMOKE STAT
To protect the polypropylene conduit from
smoke the appliance is provided with an
exhaust thermostat (20 fig. 3).
3.6 SYSTEM AVAILABLE HEAD
The head available for the heating plant is
shown as a function of the flow in graph in
fig. 21.
3.7 MAINS ELECTRICITY
CONNECTION
Use a separate electricity supply to con-
nect the room stats and relative zone val-
ves. The micro or relay contact connection
is made to TA-CR-SE (J2) connector of the
circuit board after having removed the jum-
per (fig. 22).
0
600
200 1600 1400 1200 1000 800 600 400
PORTATA (l/h)
PREV
ALENZA RESIDU
A (mbar)
500
400
100
200
300
con by-pass
senza by-pass
Plane
t Dewy - Dewy 30/80
Fig. 21
FLOW RATE (l/h)
RESIDU
AL
HEAD
(mbar)