Sime FORMAT DGT 30/55 BF Manual Del Usuario página 77

gauge connected as indicated in fig. 16.
3.09 HEAD AVAILABLE
TO SYSTEM (fig. 17)
Residual head for the heating system is
shown as a function of rate of flow in the
graph in fig. 17.
3. 1 0 WATER PRESSURE
VALVE (fig. 17/a)
The water pressure valve (C fig. 17/a)
intervenes, blocking burner functioning, if it
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 - 1,5 bar.
500
400
300
200
100
0
200 400
25/55
30/55
600 800 1000 1200
FLOW RATE (l/h) PORTATA (l/h)
B
A
Flow rate Portata
(l/h)
0
100
200
300
400
500
600
700
800
900
1000
1100
1600
1400
Fig. 16
30/55
25/55
(mbar)
(mbar)
387 400
383 391
374 382
362
370
354 359
342 345
328 330
315
310
302 290
288 270
264
244
246 ---
Fig. 17
KEY
A Deviator valve
B Circulation pump
C Water pressure valve
C
Fig. 17/a
ES
PT
ENG
77