Sime BRAVA DGT HE 12 T Instrucciones De Instalación Y Mantenimiento página 109

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shown as a function of rate of flow in the
graph in fig. 15.
To obtain the maximum head available to
the system, turn off the by-pass by turning
the union to the vertical position (fig. 15/a).
600
500
400
300
200
100
600
500
400
300
200
100
3.8
WATER PRESSURE
VALVE (fig. 15/a)
The water pressure valve (C fig. 15/a)
intervenes, blocking burner functioning, if it
0
200
400
0
200
400
C
A
con by-pass
By-pass on
senza by-pass
By-pass off
600
800
1000
PORTATA (l/h)
FLOW RATE (l/h)
con by-pass
By-pass on
senza by-pass
By-pass off
600
800
1000
PORTATA (l/h)
FLOW RATE (l/h)
D
B
REFERENCE POSITION BY-PASS
RIFERIMENTO POSIZIONE BY-PASS
detects that there is insufficient pressure
in the boiler (< 0,6 bar).
To restore burner functioning, to bring back
the pressure of the boiler at values compri-
se between 1 - 1,2 bar.
35
25 - 30
1200
20 T - 25/15 - 25/40
12 T
1200
Fig. 15
KEY
A
By-pass on
B
By-pass off
C
Water pressure valve
D
Automatic vent
Fig. 15/a
IT
ES
PT
ENG
109

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