Xylem Lowara ResiBoost MMW Series, Installation, Operation And Maintenance Manual, Page: 37 / 244

Table 20: Models MMA and MTA
Parame-
ter
Descrip-
tion
Range Unit of
meas-
urement
Default
Pr Propor-
tional co-
efficient
of the
PID reg-
ulator (*)
2 to 100 - 19
ACCEL-
ER.
Acceler-
ation
time.
Minimum
time re-
quired
for the
frequen-
cy of the
motor to
go from
minimum
to maxi-
mum fre-
quency.
2 to 15 Hz/sec 10
DECEL-
ER.
Deceler-
ation
time.
Minimum
time re-
quired
for the
frequen-
cy of the
motor to
go from
minimum
to maxi-
mum fre-
quency.
2 to 15 Hz/sec 10
FREQ.S
W.
Selection
of the
switching
frequen-
cy of the
power
mod-
ule.**
4 / 8 kHz 8
DE-
FAULT
PAR
Select
YES to
set the
default
values
NO/YES - NO
RESET
CONT.
Select
YES to
reset the
operation
counters
and the
alarm
log.
NO/YES - NO
SET
PRESS
Set the
required
0.5 to 10
0.0 to 16 bar 2.5
Parame-
ter
Descrip-
tion
Range Unit of
meas-
urement
Default
pressure
value of
the sys-
tem (set
point)
(in rela-
tion to
the full
scale of
the sen-
sor)
MIN.PRE
SS
Pressure
value of
the sys-
tem be-
low
which
the A4
"mini-
mum
pres-
sure"
alarm is
trig-
gered.
When
the alarm
is trig-
gered,
the pump
stops
and the
ART
function
is ena-
bled.
See Spe-
cial func-
tions .
Trigger-
ing of the
alarm is
delayed
by the
length of
time set
in the
MP DE-
LAY pa-
rameter.
0.0 to
( SET
PRESS
-0.4)
0.0 =
Disabled
bar 0.0
(*) these values depend on the type of installation
and are compatible with all the various types of sys-
tem.
(**) The noise level of the motor can be reduced us-
ing a frequency of 8 kHz. Increasing the switching
frequency reduces the capacity of the converter. It is
advisable to use a frequency of 4 kHz when the mo-
tor cable is long, in order to minimize the capacitive
currents in the cable.
WARNING:
Editing the parameters can cause the
converter to malfunction. Contact the as-
sistance service when modifications are
required.
5.4 Special functions
en - Original instructions
37