Xylem LOWARA e-LNEEE Series Additional Installation, Operation And Maintenance Instructions page 32

en – Original Instructions
Figure 12: Diode
Table 12: Description
No.
1
2
3
No.
P38
P39
32
- When twin mode is enabled, if only one single lack of water external contact is
used for both units (terminals 13-14 for the single-phase version, terminals 11-12
for the three-phase version), two diodes must be inserted, making sure to comply
with the polarity between the contacts of the 2 units. Refer to figure 12.
Description
I/O terminals of the pump inverter (see Table 8)
External diode
Lack of water external contact
Parameter Unit of
measurement
Adjustment type
SnG NSt FOL
[ , , ]
Multi-pump twin
adjustment mode
BuP ALt PAr
[ , , ,
FPA
]
Description
Adjustment type selection:

SnG
= single pump adjustment

NSt
= multi-pump twin adjustment, Master pump

FOL
= multi-pump twin adjustment, Follower pump
SnG
Default:
Multi-pump twin adjustment mode selection:

BuP
= Backup: only the Master pump is in operation. The
Follower pump only comes into operation in case of Master pump
fault

ALt
= Alternate operation: only one pump at the time is in
operation.
Pump operation switches regularly (parameter P57) in order to