Venting Procedure - Pump In Pressure Mode; Venting Procedure - Pump In Suction Mode - Wilo BAC Einbau- Und Betriebsanleitung

8.1.1 Venting procedure – pump in
pressure mode
8.1.2 Venting procedure – pump in
suction mode
Installation and operating instructions Wilo-BAC
WARNING! Risk of injury!
If the pump/system is installed improperly, liquid may be ejected
during commissioning. Individual components may also become
loose.
• Keep a safe distance from the pump during commissioning.
• Wear protective clothing, protective gloves and protective gog-
gles.
See (Fig. 2):
• Close the discharge valve (Fig. 2, Item 3).
• Unscrew the filling plug (Fig. 2, Item 5) (on the upper part of hydrau-
lics).
• Open the suction valve slowly (Fig. 2, Item 2) and completely fill the
pump.
• Only screw the filling plug back in after water has flown out and all air
has been eliminated.
• Open the suction valve completely (Fig. 2, Item 2).
• Check if the direction of rotation is correct according to the arrow on
the pump housing by briefly starting the pump. If the direction of
rotation is not correct, invert 2 phases on the motor terminal board.
• Open the discharge valve (Fig. 2, Item 3).
Two cases are possible.
First case, see (Fig. 1):
• Open the discharge valve (Fig. 1, Item 3).
• Open the suction valve (Fig. 1, Item 2).
• Unscrew the filling plug (Fig. 1, Item 5) (on the upper part of hydrau-
lics).
• Put a funnel into the port and slowly and completely fill the pump and
the suction pipe.
• Filling is complete when water has flown out and all air has been elim-
inated. Screw the plug back in.
• Check if the direction of rotation is correct according to the arrow on
the pump housing by briefly starting the pump. If the direction of
rotation is not correct, invert 2 phases on the motor terminal board.
Second case, see (Fig. 1/3):
• To make the filling process easier, install a vertical pipe (minimum
length 25 cm), fitted with a stopcock and a funnel, on the pump suc-
tion pipe (see Fig. 3)
• Open the discharge valve (Fig. 1, Item 3)
• Open the suction valve (Fig. 1, Item 2).
• Unscrew the filling plug (Fig. 1, Item 5) (on the upper part of the
hydraulics).
• Fill the pump and the suction pipe completely until water flows out.
• Close the stopcock (which can be left in place), remove the pipe, and
screw the filling plug back in.
CAUTION! Risk of wrong evacuation of air!
A check is always required in both cases mentioned above. After
screwing in again of the filling plug, it is necessary to:
• Start the motor by a brief impulse.
• Unscrew again the filling plug and complete the filling until the
final water level is reached in the pump.
• If necessary, repeat this operation.
• Check if the direction of rotation is correct according to the arrow on
the pump housing by briefly starting the pump. If the direction of
rotation is not correct, invert 2 phases on the motor terminal board.
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