Engli
s
h
In
s
t
a
ll
a
tion
a
nd oper
a
ting in
s
truction
s
Wilo-VeroLine IP-E, Wilo-VeroTwin DP-E
57
6.3.1
Operating modes
Main/standby mode
E
a
ch of the two pump
s
provide
s
the configur
a
tion flow r
a
te. The
other pump i
s
a
v
a
il
a
ble in c
as
e of m
a
lfunction or run
s
a
fter pump
cycling. Only one pump run
s
a
t
a
time (
s
ee Fig. 10, 11
a
nd 1
2
).
Parallel operation
In the p
a
rti
a
l lo
a
d r
a
nge, the hydr
a
ulic output i
s
provided
a
t the
beginning by one pump. The
s
econd pump will be
s
witched on when
it i
s
mo
s
t effective to do thi
s
, i.e. when the tot
a
l power con
s
umption
P
1
of both pump
s
in the p
a
rti
a
l lo
a
d r
a
nge i
s
le
ss
th
a
n the power con-
s
umption P
1
of one pump. Both pump
s
will then be
s
imult
a
neou
s
ly
a
dju
s
ted upw
a
rd
s
to the m
a
ximum
s
peed. (Fig. 14
a
nd 15).
In m
a
nu
a
l control mode, both pump
s
a
lw
a
y
s
run
s
ynchronou
s
ly.
See Section 6.4 “Other function
s
” on p
a
ge 59.
6.3.2
Behaviour in dual pump operation
Pump cycling
In du
a
l pump oper
a
tion, pump cycling i
s
done every
2
4 hour
s
(config-
ur
a
ble).
Pump cycling c
a
n be triggered:
• Intern
a
lly, time-controlled (menu <5.1.3.
2
> + <5.1.3.3>),
• Extern
a
lly (menu <5.1.3.
2
>) by
a
po
s
itive edge
a
t the “AUX” cont
a
ct
(
s
ee Fig. 19),
• M
a
nu
a
lly, (menu <5.1.3.1>).
M
a
nu
a
l or extern
a
l pump cycling i
s
po
ss
ible 5
s
econd
s
a
fter the l
as
t
pump cycling,
a
t the e
a
rlie
s
t.
Activ
a
tion of extern
a
l pump cycling
s
imult
a
neou
s
ly de
a
ctiv
a
te
s
intern
a
l time-controlled pump cycling.
Behaviour of the inputs and outputs
Actu
a
l v
a
lue input IN1
s
etpoint input IN
2
• At the m
as
ter:
a
ct
s
on the whole unit.
“Extern
a
l Off”
• Set
a
t the m
as
ter (menu <5.1.7.0 >): depending on the
s
etting in
menu <5.1.7.0 >,
a
ct
s
only on the m
as
ter or on the m
as
ter
a
nd the
s
l
a
ve.
• Set
a
t the
s
l
a
ve:
a
ct
s
only on the
s
l
a
ve.
Fig. 14:
p-c
control (parallel operation)
Q
s
H
m
a
x
H
H
s
H
min
Fig. 15:
p-v
control (parallel mode)
Q
H
H
Q
H
m
a
x
H
s
H
min