Startup; Flushing The Pipe System; Priming; Checking The Direction Of Rotation - Grundfos TP Serie Instrucciones De Instalación Y Funcionamiento

7. Startup

7.1 Flushing the pipe system

The pump is not designed to pump liquids
containing solid particles such as pipe
debris and welding slag. Before starting up
the pump, the pipe system must be
thoroughly cleaned, flushed and filled with
Caution
clean water.
The warranty does not cover any damage
caused by flushing the pipe system by
means of the pump.

7.2 Priming

Do not start the pump until it has been
filled with liquid and vented. To ensure
Caution
correct venting, the vent screw must point
upwards.
Closed systems or open systems where the
liquid level is above the pump inlet:
1. Close the isolating valve on the outlet side and
loosen the vent screw in the motor stool. See fig.
15.
Warning
Pay attention to the direction of the vent
hole and make sure that the escaping
liquid does not cause injury to persons or
damage to the motor or other components.
In hot-liquid installations, pay special
attention to the risk of injury caused by
scalding hot liquid.
In cold-liquid installations, pay special
attention to the risk of injury caused by the
cold liquid.
2. Slowly open the isolating valve on the inlet side
until a steady stream of liquid runs out of the vent
hole.
3. Tighten the vent screw and completely open the
isolating valve(s).
Open systems where the liquid level is below the
pump inlet
The inlet pipe and the pump must be filled with liquid
and vented before the pump is started.
1. Close the isolating valve on the outlet side and
open the isolating valve on the inlet side.
2. Loosen the vent screw. See fig. 15.
3. Remove the plug from one of the pump flanges,
depending on the pump location.
4. Pour liquid through the priming hole until the inlet
pipe and the pump are filled with liquid.
5. Replace the plug and tighten securely.
6. Tighten the vent screw.
The inlet pipe can to some extent be filled with liquid
and vented before it is connected to the pump. A
priming device can also be installed before the
pump.
Vent screw
Fig. 15 Position of vent screw

7.3 Checking the direction of rotation

Do not start the pump to check the direction of
rotation until it has been filled with liquid.
Do not check the direction of rotation with
the motor alone, as an adjustment of the
Note
shaft position is required when the
coupling has been removed.
The correct direction of rotation is shown by arrows
on the motor fan cover or on the pump housing.
13