Emptying The System; Non-Return Valve - DAB e.sybox Bedienungs- Und Wartungsanweisung

Use of end "C":
this is practically a straight tip screwdriver of
the correct size for manoeuvring the caps of
the main connections of the system (1" and
1"1/4). To be used at the first installation to
remove the caps from the mouths on which
you want to connect the system; for the filling
operation in the case of horizontal installation;
to access the non-return valve, ... If the key
is lost or damaged, the same operations can
be performed using a straight tip screwdriver
of a suitable size..

12.2 Emptying the system

Qual If you want to drain the water out of the system, proceed as follows:
1. disconnect the power supply;
2. turn on the delivery tap closes to the system so as to remove pressure from the system and empty it as much as possible;
3. if there is a check valve immediately downstream from the system (always recommended), close it so as not to let out the water that is in
the plant between the system and the first turned on tap;
4. interrupt the suction pipe in the point closest to the system (it is always recommended to have a check valve immediately upstream from the
system) so as not to drain the whole suction system;
5. remove the drainage cap (fig.1 face E) and let out the water inside (about 2.5 litres);
6. the water that is trapped in the delivery system downstream from the non-return valve integrated in the system can flow out at the time of
disconnecting the system, or on removing the cap of the second delivery (if not used).
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.

12.3 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. Although it is recommended to use fresh water and eventually fit filters on input, if
you notice abnormal operation of the non-return valve it can be extracted from the system and cleaned and/or replaced by proceeding as follows:
(Fig.26):
1. remove the valve access cap;
2. insert the accessory cross key in end "F" (par. 12.1) so as to catch the perforated tab with the hooks;
3. extract without rotating: the operation may require a certain effort. A cartridge is extracted which also holds the valve to be serviced. The
cartridge remains on the key;
4. disengage the cartridge from the key: the hooks are released by pushing the cartridge and the key against each other, at this point slip the
cartridge off the side;
5. clean the valve under running water, ensure that it is not damaged and replace it if necessary;
6. put the complete cartridge back in its seat: the operation requires the force necessary to compress the 2 O-rings. If necessary, use end "D"
of the cross key to help you push. Do not use end "F" or the hooks will again engage the tab of the cartridge and it will be impossible to
release them;
7. Screw on the cap till snug: if the cartridge has not been pushed correctly in place, screwing on the cap will complete its positioning.
Use of end "D":
hexagonal socket head suitable for removing
the cap to perform filling in the case of vertical
installation. If the key is lost or damaged, the
same.
Figure 23
ENGLISH
Figure 24
69
Use of end "E":
this is practically a straight tip screwdriver of
the correct size for manoeuvring the motor
shaft access cap and, if the interface for quick
connection of the system has been installed
(par. 11.3), for access to the key for
disengaging the connection. If the key is lost
or damaged, the same operations can be
performed using a straight tip screwdriver of
a suitable size. .
Use of end "F":
the function of this tool is dedicated to
maintenance of the non-return valve and it is
better described in the respective paragraph 12.3.
Figure 25