Cleaning The Built-In Filter; Emptying The System; Non-Return Valve - Granit COMFORT Premium C-85 Instrucciones De Instalación Y Mantenimiento

9.2 Cleaning the Built-in Filter

For correct working of the system and achieving the declared performance, clogging of the filter must be prevented. Check
the filter cartridge periodically through the transparent cover and, if necessary, clean it as described below.
1. disconnect the electric supply and wait for 10 minutes;
2. if the system is installed with positive suction head, close the On/Off valve at the suction end;
3. remove the filler cap by unscrewing it manually or use the tool included in the supply;
4. remove the cartridge without rotating it. the relative filter cup-support is also released;
5. empty the cup and wash the cartridge under running water;
6. refit the cartridge back in place taking care to make sure it fits in the cup by means of a bayonet coupling;
7. close the filler cap so that it comes to a mechanical stop.
If the system is to be reused, and not stored away, restore the pump suction and repeat the filling (Sect.2.2) and priming
(Sect.3.3) operations, preferably before point 7. in case of suction lift installation.

9.3 Emptying the system

If you want to drain the water out of the system, proceed as follows:
1. disconnect the electric supply and wait for 10 minutes;
2. if the system is installed on a plant, cut off the suction duct at the point nearest to the system (it is advisable to
have an On/Off valve immediately upline of the system) so that the entire suction system is also not discharged;
3. if the system is installed on a plant, open the nearest delivery tap to discharge pressure to the plant and drain it as
much as possible;
4. If the system is installed on a plant, if an On/Off valve is present immediately downline (it is always advisable to
have one), close this to prevent the quantity of water from flowing back to the plant between the system and the
first tap open;
5. disconnect the pump from the plant;
6. remove the drainage cap (4-Fig.1) and drain out the water inside;
7. refit the drainage cap back in place, taking care to make sure the O-Ring is positioned properly inside it;
8. the water trapped in the delivery system downline of the non-return plant integrated in the system can flow back
only the moment the system is disconnected.
Though essentially drained, the system is unable to expel all the water that it contains.
During handling of the system after emptying it, some small amounts of water may probably leak out from the
system.
It is always advisable to use a three-piece connector at the suction as well as delivery to be able to execute
point 5 easily.

9.4 Non-return valve

The system has an integrated non-return valve which is necessary for correct operation. The presence of solid bodies or
sand in the water could cause malfunctioning of the valve and therefore of the system.
the presence of a filter at the inlet is recommended, if the non-return valve is seen to operate abnormally, it can be removed
from the system and cleaned and/or replaced by proceeding as follows:
ENGLISH
Figure 7
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Although the use of clear water and