velda Green Line 12500, User Instructions

that,  as  the  occasion  arises,  the  preliminary  filter  scale  and  impeller  should  be     
cleaned before putting the pump into use again (see also below). 

Thermal security device

To prevent overheating and consequently damage to the motor, Green Line Pumps 
have  a  built-in  thermal  security  device.  Remember,  if  the  motor  is  deactivated  by 
overheating you should check the following points before starting the pump again. 
Stop any activities on the pump.
Always switch off the power voltage by pulling the plug out of the receptacle.

l

Is the pump sufficiently immersed in the water?

l

Is the preliminary filter scale polluted, as a result of which the water supply to the 
pump stagnates?

l

Is the impeller or hose socket polluted?

l

Has the pump cooled down sufficiently before restarting it?

As soon as these points have been found to be in order, the pump can be restarted.

Impeller (see illustration)

Not  only  to  remove  trouble,  but  also  to  be  sure  of  a  satisfactory  water  yield,  the 
impeller should be cleaned regularly. To this end you should proceed as follows:

l

Deactivate the power voltage and remove the pump from the pond.

l

Open the preliminary filter scale by opening the green clamps.

l

Remove the large and small bracket by removing the screws.

l

Loosen the swivel of the pump outlet and remove the pump from the filter scale.

l

Open the motor case by removing the 4 screws.

l

Carefully remove the impeller from the motor case.

l

Clean all parts under freely running water, using a soft brush.

l

Assemble all parts in reverse order. Take care that the impeller will run smoothly 
again in the motor housing and that the rubber rings are mounted in the right way. 

USE IN WINTER

If the outside temperature does not go down below -5°C for a longer period of time 
and the pump is sufficiently immersed in water, a Green Line pond pump can also be 
normally used in winter. In severe winters with temperatures lower than -5°C it is to be 
recommended to remove the pump from the pond. Properly clean both the pump 
and the pre-liminary filter scale. Inspect the pump and the flex for any damage. To 
prevent the rubbers from drying out, it is to be recommended to store the pump wet, 
for example in a bucket of water.

CAPACITY

The required pump capacity depends on the type of pond and the filter system.

Model

a lot of koi, no plants 

a lot of fish, few plants 

few fish, a lot of plants

   5000 

   2500 litres 

   5000 litres 

10.000 litres

   8000 

   4000 litres 

   8000 litres 

16.000 litres

12500 

   6000 litres 

12.500 litres 

25.000 litres

15000 

   7500 litres 

15.000 litres 

30.000 litres

20000 

10.000 litres 

20.000 litres 

40.000 litres