108
replaced. The electronic board is faulty.
In the case of a sudden lack of voltage, the
burner will immediately switch off. When
voltage returns, the boiler will automatically
start up again.
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. The speed of the modula-
ting pump WILO-YONOS PARA PWM is set
as default (installation parameter
PAR 13
= - -
).
0
600
200
1200
1000
800
600
400
PORTATA (l/h)
PREV
ALENZA RESIDU
A (mbar)
500
400
100
200
300
Mur
elle HM (WIL
O Y
O
N
OS P
ARA)
700
800
Fig. 14
RESIDU
AL
HEAD (mbar)
FLOW RATE (l/h)
Summary of Contents for MURELLE HM
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