DAB Esybox Serie Instructions Pour L'installation Et L'entretien page 67

11. PARTICULAR INSTALLATIONS
11.1 Inhibiting self-priming
The product is made and supplied with the capacity of being self-priming. With reference to par. 6, 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).
When the water arrives at the system intake already under pressure (maximum allowed 2 bar) 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 (unless you decide to inhibit self-priming at the first installation);
3. remove the drainage cap anyway, taking care not to drop the O-ring (Fig.18);
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.
3
5
11.2 Wall installation
This product is already set up for installation hanging on the wall with the DAB accessory kit, to be purchased separately. The wall installation
appears as in Fig.18.
ENGLISH
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6
Figure 18
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Figure 17
Figure 19