Electrical Connection - Wilo BAC Einbau- Und Betriebsanleitung

7.4

Electrical connection

Safety
Installation and operating instructions Wilo-BAC
• For an indirect connection via a tank, the suction pipe must have a
strainer to keep any impurities out of the pump, as well as a non-
return valve.
• If the pump is operated in suction mode (Fig. 1):
immerse the strainer into the fluid (at least 200 mm) and, if necessary,
put weights on the flexible hose. Limit the length of the suction pipe
and avoid all features that cause losses of head (tapers, bends, etc.).
No air must get into this pipe which rises upwards (by 2%).
CAUTION Risk of leak!
The alignment of the pipes and the pump ports is important.
• If a "Victaulic" pipe union is used, an angular deviation of max. 3° of
2'' pumps is allowed, and an angular deviation of max. 2° of 3'' od
pumps is allowed
• If screwed unions are used, the alignment of the pump ports must
not have any deviation and the tightening must not exceed 4daNm.
• Carefully seal the pipes with suitable products.
Nominal connection diameter (DN) of the pump:
Port type
Victaulic ≤ 2,2 kW 2" (Ø 60,3 mm)
Victaulic > 2,2 kW 3" od (Ø 76,1 mm)
Threaded ≤ 2,2 kW 2" (50-60 mm)
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.
• Check to ensure all connections (including potential-free contacts)
are voltage-free.
• For a safe installation and operation, a proper grounding of the
pump to the grounding terminals of the power supply is required.
• Observe the installation and operating instructions for the acces-
sories!
• Make sure that the operating current, the voltage and the frequency
comply with the rating plate data of the motor.
• The pump must be connected to the power supply by a solid cable
that is equipped with a grounded plug-connection or a main power
switch.
• Three-phase motors must be connected to an approved safety
switch. The nominal current must correspond to the electrical data on
the rating plate of the motor.
• The supply cable must be laid in a way that it never touches the pipe-
work and/or the pump and motor housing.
• The pump/installation must be grounded in compliance with local
regulations. A ground fault interrupter can be used as an extra protec-
tion.
• The connection to the network must be in accordance with the con-
nection plan.
Port ND (tapped):
Suction Discharge
1
1 " (Ø48,3 mm)
/
2
3" od (Ø 76,1 mm)
1
1 " (40-49 mm)
/
2
English
25