Monitoring Of Oil Lubrication System; Bm Hp Circulation Pump - Grundfos BMEX Serie Instrucciones De Instalación Y Funcionamiento

7.1.5 Monitoring of oil lubrication system

The oil lubrication system is monitored by a level switch
positioned as shown in fig. 11. The electrical connection to 0-250
V (with a maximum 10 A back-up fuse) is made in the terminal
box.
During periods of inactivity, the oil container may be
empty. Check the oil level after 5 minutes of
Note
operation. If necessary, refill the oil container.
Level switch
Max. oil level
Min. oil level
Terminal box
Fig. 11 Oil lubrication system

7.2 BM hp circulation pump

The electrical connection must be carried out by an authorised
electrician in accordance with local regulations.
Warning
Before making any electrical connections, make sure
that the power supply has been switched off and that
it cannot be accidentally switched on.
The pump must be connected to an external mains
switch with a minimum contact gap of 3 mm in all
poles.
The pump must be earthed.
The required voltage quality measured at the motor terminals is -
10 %/+ 6 % of the rated voltage during continuous operation
(including variation in the supply voltage and losses in cables).
Check that there is voltage symmetry in the power supply lines,
i.e. approximately same difference of voltage between the
individual phases. See also section
cable, point 1.
In order for the pump to meet the EC EMC Directive (2004/108/
EC), a 0.47 µF capacitor (in accordance with IEC 384-14) must
always be connected over the two phases to which the
temperature transmitter is connected. See fig. 12.
0.47 µF
0,47 µF
RD = red
YE = yellow
BK = black
Fig. 12 Electrical connection, BM hp circulation pump
23. Checking motor and
RD
YE
BK
BM hp
The electrical connections must be made in the terminal box. See
figures 13, 14 and 15.
Terminal box
Fig. 13 Position of terminal box, BM hp circulation pump
Black :U
M
Red :V
Yellow
:W
Fig. 14 BM hp circulation pump, direct-on-line starting
W2 B2
S
U
P
V2 R2
P
L
U2 Y2
Y
F W1 R1
O
R
V1 Y1
U1 B1
B = black
B=Black, R=Red, Y=Yellow
R = red
Y = yellow
Fig. 15 BM hp circulation pump, star-delta starting
BM hp
S
L1
U
P
L2
P
L
L3
Y
M
9