93
ES
PT
ENG
3.8
WATER FLOW GUAGE
The.water.flow.gauge.(4.fig..3).intervenes,.
blocking. burner. functioning,. in. case. the.
boiler.is.lacking.of.water.for.formation.of.
air.bubbles.in.the.heat.exchanger.and.the.
case.the.pump.not.functions.
N.B.: when replacing the flow meter
valve, verify that the arrow printed on its
body is pointing in the same direction of
the water flow.
3.9
HEAD AVAILABLE TO SYSTEM
(fig. 14)
Residual. head. for. the. heating. system. is.
shown.as.a.function.of.rate.of.flow.in.the.
graph.in.fig..14..
0
600
200
1200
1000
800
600
400
PORTATA.(l/h)
PREV
ALENZA.RESIDUA.(mbar)
500
400
100
200
300
Mur
el
le
.HE.25/55.-.30/55.ErP
25/55 ErP
30/55 ErP
Fig..14
RESIDUAL
.HEAD
.(mbar)
FLOW.RATE.(l/h)