Hunt sime 30e, Installation Instructions Manual, Page: 27 / 34

6.3.8 WATER PRESSURE VALVE
The water pressure valve (C fig. 17) interve-
nes, 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 - 1,2 bar.
6.3.9 HEAD AVAILABLE
TO SYSTEM
Residual head for the heating system is
shown as a function of rate of flow in the
graph in fig. 16.
To obtain the maximum head available to
the system, turn off the by-pass by turning
the union to the vertical position (fig. 17).
0
200
1600
1400 1200 1000 800 600 400
PORTATA (l/h)
400 400
100
200
300
For
mat DGT
600
By-pass inserito
By-pass escluso
RESIDU
AL
HEAD
(mbar)
FLOW RATE (l/h)
Fig. 16
A
B
C
RIFERIMENTO POSIZIONE BY-PASS
Fig. 17
LEGENDA
A
By-pass on
B By-pass off
C Water pressure valve
By-pass on
By-pass off
REFERENCE POSITION BY-PASS
Page 27 of 34
This valve must not be disabled or
bypassed at any time.