Particular Installations - Granit COMFORT Premium C-85 Instrucciones De Instalación Y Mantenimiento

AY Anticycling Function
AE Anti-blocking function
AF Antifreeze

8. PARTICULAR INSTALLATIONS

8.1 – e18
The product is made and supplied with the capacity of being self-priming. With reference to par. 4, the system is able to
prime and therefore operate in whatever installation configuration chosen: below head or above head. However there are
cases in which the self-priming capacity is not necessary, or areas where it is forbidden to use self-priming pumps. During
priming the pump obliges part of the water already under pressure to return to the suction part until a pressure value is
reached at delivery whereby the system can be considered primed. At this point the recirculating channel closes
automatically. This phase is repeated each time the pump is switched on, even already primed, until the same pressure
value that closes the recirculating channel is reached (about 1 bar -14.5 psi).
When the water arrives at the system intake already under pressure or when the installation is always below head, it is
possible (and mandatory where local regulations require it) to force the closure of the recirculating pipe, losing the self-
priming capacity. This obtains the advantage of eliminating the clicking noise of the pipe shutter each time the system is
switched on.
To force closure of the self-priming pipe, proceed as follows:
1. Disconnect the power supply;
2. empty the system;
3. remove the drainage cap, taking care to make sure the O-Ring does not fall (Fig. 5) (Fig.5);
4. with the aid of pliers take the shutter out of its seat. The shutter will be extracted together with the O-Ring and the
metal spring with which it is assembled;
5. remove the spring from the shutter; insert the shutter in its seat again with the respective O-Ring (side with gasket
towards the inside of the pump, stem with cross-shaped fins towards the outside);
6. screw on the cap after having positioned the metal spring in side so that it is compressed between the cap itself
and the with cross-shaped fins of the shutter stem. When repositioning the cap ensure that the respective O-Ring
is always correctly in its seat;
7. fill the pump, connect the power supply, start the system.
If the system is installed on a plant, it is advisable to force closure of the self-priming duct before use the first
time, or, in any case, before connecting the system to the plant. With the electric power supply disconnected,
follow points 3. to 7. listed above (Sect. 8.1).
ENGLISH
Table 10: Factory settings
17
SMART
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