Startup Of Pump With Air-Cooled Top (Cool-Top ® ) - Grundfos CR Serie Instrucciones De Instalación Y Operación

Startup of pump with air-cooled top (
16.
Caution
Do not start the pump until it has been filled with liquid and vented.
Warning
Pay attention to the direction of the vent hole and ensure 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. We recommend you to connect a drain pipe to the 1/2" air vent in order to lead the hot
water/steam to a safe place.
Step
1
Open
2
3
Open
4
Cool-Top
Closed
Open
®
)
The air-cooled top should only be started up with cold liquid.
Close the isolating valve on the discharge side and open the isolating
valve on the suction side of the pump.
Remove the priming plug from the air-cooled chamber (pos. 2) and
slowly fill the chamber with liquid.
When the chamber is completely filled with liquid, replace the priming
plug and tighten securely.
Open the isolating valve on the discharge side of the pump.
The valve may have to be partially closed when the pump is started if
there is no counter pressure (i.e. boiler not up to pressure).
Start the pump and check the direction of rotation.
See the correct direction of rotation of the pump on the motor fan
cover.
If the direction of rotation is wrong, interchange any two of the
incoming power supply leads.
After 3 to 5 minutes, the air vent has been filled with liquid.
During start-up of a cold pump with hot liquid, it is
Note
Note
normal that a few drops of liquid are leaking from the
sleeve.
Action
25