Wilo Wilo-CronoBloc-BL, Installation And Operating Instructions Manual

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English
30 WILO SE 11/2013
• Shut-off devices must always be installed in front of and behind the
pump in order to avoid having to drain the complete system when the
pump is inspected or replaced.
NOTE
A settling section must be provided before and after the pump, in the
form of a straight pipe. The length of this settling section should be at
least 5 x DN of the pump flange (Fig. 10). This measure serves to avoid
flow cavitation.
• The lantern has an opening on the underside which allows a drain pipe
for condensation water/condensate to be connected (e.g. when used
in air-conditioning or cooling systems). The condensate generated
can then be effectively drained.
• The pipes and pump must be free of mechanical stress when installed.
The pipes must be fastened in such a way that the pump does not
bear the weight of the pipes.
• The bleed valve (Fig. 1/2/3, Item 1.31) must always face upwards.
• All installation positions except for “motor facing down” are allowed.
NOTE
The installation position with horizontal motor shaft is permitted
for the IL and DL series only up to a motor power of 15 kW (Fig. 11).
A motor support is not necessary. Only the installation position with
vertical motor shaft is intended for a motor power >15 kW. BL series
monobloc pumps are to be mounted on a sufficiently strong base or
mounting brackets (Fig. 12).
NOTE
The motor terminal box must not face downward. If necessary, the
motor or motor impeller unit can be rotated once the hexagon head
bolts have been loosened. While rotating the motor or motor impeller
unit, ensure that the housing O-ring seal does not become damaged.
NOTE
When pumping out a tank, ensure that the fluid level is always high
enough above the suction port of the pump so that the pump never
runs dry. The minimum intake pressure must be maintained.
NOTE
In the case of insulated systems, only the pump housing may be insu-
lated, not the lantern, motor and motor (Fig. 1/2/3, Item 1.3 to 2).
7.2 Electrical connection
Safety DANGER! Risk of fatal injury!
A fatal shock may occur if the electrical connection is not made
correctly.
• Only allow the electrical connection to be made by an electrician
approved by the local electricity supplier and in accordance with
the local regulations in force.
• Observe the installation and operating instructions for the acces-
sories!
Fig. 10: Settling section before and after the pump
r
5 x DN
d s
r
⬇
2,5 · (d · 2s)
Fig. 11: IL/DL
DL
IL
Fig. 12: BL