Wilo EMU FA+T Einbau- Und Betriebsanleitung Seite 59

INSTALLATION
Fig. 7: Motor connection diagram in direct starting
U
V Mains connection
W
Fig. 8: Motor connection diagram in star-delta starting
U1
Mains connection;
V1
start of winding
W1
PE Earth
5.5.4. Connecting the monitoring devices
The following list of various connection diagrams
only covers the cable assignments available as
standard. For order-specific versions, a separate
connection diagram is provided for each order.
Each monitoring device must always be con-
nected!
RISK of fatal injury due to explosive atmos-
phere!
If the monitors are not connected correctly,
there is a risk of fatal injury due to explo-
sion if used in potentially explosive areas!
Always have the connection carried out by an
electrician. If the pump is used in potentially
explosive areas:
• the temperature monitor must be connected
via an evaluation relay. We recommend the
'CM-MSS' relay for this. The threshold is
already pre-set.
• Deactivation by the temperature limiter
must be conducted with an anti-reactivation
device! Reactivation should only be possi-
ble if the 'release button' has been manually
activated!
• The electrode for sealing chamber control
must be connected via an intrinsically safe
circuit with an evaluation relay! We recom-
mend the 'XR-41x' relay for this. The thresh-
old is 30 kΩ.
• Also note the additional information in the
appendix!
Motor/terminal compartment monitoring
• The motor/terminal compartment monitor-
ing (moisture sensor) must be connected via an
evaluation relay. We recommend the 'NIV 101/A'
relay for this. The threshold is 30 kΩ.
When the threshold is reached, the unit must
deactivate.
Motor temperature monitoring
• Bimetallic strips must be connected in the
switchgear itself or via an evaluation relay.
Connection values: max. 250 V(AC), 2.5 A, cos φ
= 1
• PTC sensors (in accordance with DIN 44082) must
be connected via an evaluation relay. We recom-
Installation and operating instructions Wilo-EMU FA + T-Motor
Leakage detection for
DK
motor compartment
PE Earth
U2
Mains connection, end
V2
of winding
W2
Leakage detection for
DK
motor compartment
mend the 'CM-MSS' relay for this. The threshold is
already pre-set.
• Depending on whether there are one or two tem-
perature circuits present, the following triggering
status must occur when the threshold value is
reached:
• Temperature limiting (one temperature circuit):
When the threshold is reached, the unit must
deactivate.
• Temperature control and limiting (two tem-
perature circuits): When the threshold for the
low temperature (control) is reached, an 'early
warning' may be triggered, and when the
threshold for the high temperature (limiting) is
reached, a 'deactivation' must be triggered.
Comply with the information in the appendix
regarding use in potentially explosive atmos-
pheres!
For this reason, no warranty claims can be ac-
cepted for any damage to the winding resulting
from unsuitable motor monitoring.
Fig. 9: Bimetallic strip connection diagram
Temperature limiting
(one temperature circuit)
20 Temperature sensor
connection
21
Fig. 10: PTC sensor connection diagram
Temperature limiting
(one temperature circuit)
10 PTC connection (in
accordance with
DIN 44082)
11
Sealing chamber monitoring
• The sealing chamber is monitored by a pen-
cil electrode. This must be connected via an
evaluation relay. We recommend the 'NIV 101/A'
relay for this. The threshold is 30 kΩ. When the
threshold is reached, a warning must be given or
the unit switched off.
Comply with the information in the appendix
regarding use in potentially explosive atmos-
pheres!
CAUTION!
If there is only a warning, the pump could be
irreparably damaged by water ingress. We
always recommend switching the pump off!
Temperature control and
limiting
(two temperature circuits)
High temperature con-
21
nection
20 Middle connection
Low temperature con-
22
nection
Temperature control and
limiting
(two temperature circuits)
High temperature con-
11
nection
10 Middle connection
Low temperature con-
12
nection
English
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