Wilo -Rexa PRO series Einbau- Und Betriebsanleitung Seite 20

US English
The wires of the connection cable are assigned as
follows:
7-wire connection cable
Wire number
1
2
3
4
5
6
Green/yellow
If the pump is fitted with a plug, it is connected
to the power supply by inserting the plug into a
socket.
5.5.4. Three phase AC motor
Fig. 6.: Connection diagram with bimetallic strip
L1
L2 Line power
L3
PE Ground
Fig. 7.: Connection diagram with PTC sensor
L1
L2 Line power
L3
PE Ground
The three phase version is supplied with free cable
ends. The connection to line power is made in the
switchgear.
Electrical connections may only be made by a
qualified electrician!
The wires of the connection cable are assigned as
follows:
7-wire connection cable
Wire number
1
2
3
4
5
6
20
Terminal
Temperature monitor for winding
L (U1/Z1)
N (U2)
Z2 - connection for the operating
capacitor
Leakage detection for motor com-
partment
Ground (PE)
Leakage detection for
DK
motor compartment
20
Bimetallic strip
21
Leakage detection for
DK
motor compartment
10 PTC sensor (in acc. with
DIN 44082)
11
Terminal
Temperature monitor for winding
U
V
W
Leakage detection for motor com-
partment
Green/yellow Ground (PE)
If the pump is fitted with a plug, it is connected
to the power supply by inserting the plug into a
socket.
The specified wire assignments apply to the stan-
dard pumps in the PRO series.
The wire assignment for freely configured pumps
in the PRO series can be found in the connection
diagram enclosed with this manual.
5.5.5. Connecting the monitoring devices
RISK of fatal injury due to explosion!
If the monitors are not connected correctly,
there is a risk of fatal injury due to explosion 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 comes preset.
• Deactivation by the temperature limiter must be
conducted with an anti-reactivation mecha-
nism, meaning that reactivation should only be
possible if the "release button" has been pressed
manually!
• The pencil electrode for sealing chamber control
must be connected via an intrinsically safe cir-
cuit with an evaluation relay. We recommend the
"XR-42x" relay for this. The threshold is 30 kΩ.
• Also note the additional information in the
appendix!
All monitoring devices must be connected at all
times.
Motor temperature monitor
The pump is equipped with a temperature limiter
as standard (one-circuit temperature monitoring).
When the threshold is reached, the pump must
switch off.
If a temperature controller and limiter are fit-
ted (two-circuit temperature monitoring; can be
ordered as an option), a "preliminary warning" can
take place at the low value and "deactivation" must
take place at the higher value.
• When used outside potentially explosive areas, the
bimetallic strips can be connected directly in the
switchgear.
Connection values: max. 250 V(AC), 2.5 A, cos φ = 1
• PTC sensors (optionally available and in accordance
with DIN 44082) must be connected via an evalua-
tion relay. We recommend the "CM-MSS" relay for
this. The threshold is already preset.
For this reason, no warranty claims can be accept-
ed for any damage to the winding resulting from
unsuitable motor monitoring.
INSTALLATION
WILO SE 2014-11 V05 Letter