ENGLISH
70
PK
Low pressure threshold
on suction
1,0 bar 4 psi
TB
Blockage time for water
lack
15 s 15 s
GP
Proportional gain
coefficient
0,5 0,5
Integral gain coefficient
IC
Configuration of the
reserve
1 (Auto) 1 (Auto)
Table 24
14. PARTICULAR INSTALLATIONS
14.1. Disabling self-priming
The product is made and supplied with the capacity of being self-priming. 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 port 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 port, losing the self-priming
capacityThis gives the advantage of eliminating the clap-like noise of the pipe shutter each time the system is switched on.
To force closure of the self-priming pipe, proceed as follows:
• Disconnect the power supply;
• empty the system (unless you decide to inhibit self-priming at the first installation);
• remove the drainage cap on Face E, taking care not to drop the O-Ring;
• 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;
• 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);
• 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;
• fill the pump, connect the power supply, start the system.
14.2. Installation with quick connection
DAB supplies an accessory kit for Quick Connection of the system. This is a quick coupling base on which to make the connections to
the plant and from which the system can be simply connected or disconnected.
Advantages:
• possibility of making up the plant on-site, testing it, but removing the actual system until the moment of delivery, avoiding possible
damage (accidental blows, dirt, theft, …);
• it is easy for the Assistance service to replace the system with a “spare” in the event of special maintenance.
The system mounted on its quick connection interface appears as in Fig. 10.
Parameters available in version KIWA
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